RT9480 Datasheet. Www.s Manuals.com. R04 Richtek

User Manual: Marking of electronic components, SMD Codes 1Q, 1Q=**. Datasheets FMMT5088, KST5088, MMBT5088, RT9480GQW.

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RT9480
Easy to Use Power Bank Solution (EZPBSTM) Integrated Chip
with Two Ports Output
General Description

Features

The RT9480 is a high integration and easy to use power
solution for Li-ion power bank and other powered handheld
applications. We call it EZPBSTM (Easy to Use Power
Bank Solution). This single chip includes a linear charger,
a synchronous Boost with dual output load management
and a torch function support. The battery volume and the
state of charging and discharging can be indicated by
4LEDs. The RT9480 is available in the WQFN-24L 4x4
package.

EZPBSTM (Easy to Use Power Bank Solution)





Charger



Applications





Li-ion Power Bank



Ordering Information

One Linear Charger up to 1.2A
DPM Function (Dynamic Power Management)
Thermal Regulation
Auto-Recharge
Support JEITA Function

USB Output

RT9480



Serial Number
Package Type
QW : WQFN-24L 4x4 (W-Type)
(Exposed Pad-Option 2)




Lead Plating System
G : Green (Halogen Free and Pb Free)

Support Dual USB Output
Auto and Button Control
Sync-Boost Total Output Current up to 2.5A
 Peak Efficiency 97%

Battery State of Charge (SOC) Indicator

Note :



Richtek products are :





Compact BOM Elements with EZPBSTM Single Chip
Protection Functions (OTP, OVP, OCP, VBUS and
Output Short Protection)
Support Charging and Discharging at the same time
by Smart Algorithm

RoHS compliant and compatible with the current require-



Battery SOC Detection
Support NTC for Battery Temperature Sensing
4LEDs for Battery SOC Display

ments of IPC/JEDEC J-STD-020.


Other Functions

Suitable for use in SnPb or Pb-free soldering processes.



Torch Functions

Simplified Application Circuit
Input Power

VBUS
CIN

RT9480

VBAT

Battery
CBAT

L1
Battery

LXBST

USBOUT1

USB Port 1

USBOUT2

USB Port 2

C1
VMID
SWIN2

LEDx

LED Indicator

CVMID
TORCH
BUTTON

DS9480-04

December 2014

Torch Function

GND

is a registered trademark of Richtek Technology Corporation.

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1

RT9480
Pin Configurations

Marking Information

(TOP VIEW)
VBUS
PGNDBST
PGNDBST
LXBST
LXBST
VMID

For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.

24 23 22 21 20 19

VBAT
TS
LED1
LED2
LED3
LED4

GND

15
25

5
6

14
13

9 10 11 12

NC
NC
GND
TORCH
BUTTON
TP1

USBOUT1
USBOUT1
SWIN2
USBOUT2
NC
TP2

WQFN-24L 4x4

Product Name List
Serial
Number

Product Name

Auto/Button

SOC LED
Number

Programmable

Battery
Regulation

Time Out of
USBOUT Detach

Button

4LEDs

Disable

4.2V

12 Hours

RT9480GQW
AA01

RT9480GQW-AA01

Auto

4LEDs

Disable

4.2V

3sec

AA02

RT9480GQW-AA02

Button

4LEDs

Disable

4.35V

12 Hours

AA03

RT9480GQW-AA03

Button

4LEDs

Disable

4.2V

3sec

AB01

RT9480GQW-AB01

Enable

* : Please refer to application note.
-- : Set by program

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2

is a registered trademark of Richtek Technology Corporation.

DS9480-04

December 2014

RT9480
Functional Pin Description
Pin No.

Pin Name

Pin Function

VBAT

Battery Charge Current Output.

Battery Temperature Sense Setting.

LED1

Current Sink Output for LED1.

LED2

Current Sink Output for LED2.

LED3

Current Sink Output for LED3.

LED4

Current Sink Output for LED4.

No Internal Connection.

GND

Ground. The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.

TORCH

Current Sink Output for Torch LED Function. Open Drain Output

BUTTON

Button Control Input for mode change.

TP1

Connected to GND.

TP2

Connected to GND.

USBOUT2

USB-2 Power Output.

SWIN2

USB-2 Power Input.

USBOUT1

USB-1 Power Output.

VMID

Boost Output.

20, 21

LXBST

Boost Switch Output.

22, 23

PGNDBST

Boost Power GND.

VBUS

VBUS Power Supply.

7, 8, 14
9,
25 (Exposed Pad)

17, 18
19

DS9480-04

December 2014

is a registered trademark of Richtek Technology Corporation.

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3

RT9480
Function Block Diagram

VBUS

Linear Charger 1.2A

USBOUT1

USB-1 Load
Manager Up to 2.1A

USBOUT2

USB-2 Load
Manager Up to 1A

VBAT

SWIN2
Central Control

VMID

1. Battery Capacity
Detection
2. Protection
3. LED Display
4. Mode Control
5. Button Operation

LXBST

PGNDBST

LED1
LED2
LED3
LED4
TP1
TP2

BUTTON

TORCH

Torch Brightness
Control (Open Drain)

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4

GND

is a registered trademark of Richtek Technology Corporation.

DS9480-04

December 2014

RT9480
Operation
The RT9480 is a high integrated IC for Li-Ion battery power
bank. It includes a linear charger 1.2A, a synchronous
Boost 5.1V, two output load management, LED indicator
and torch function.
Change Current
Base on thermal regulation function, the charging current
can support up to 1.2A.
VBUS OVP
If the input voltage (VBUS) is higher than the threshold
voltage VOVP, the internal OVP signal will go high and the
charger will stop charging until VIN is below VOVP − ΔVOVP.

The converter has an over-temperature protection. When
the junction temperature is higher than the thermal
shutdown rising threshold, the system will be latched and
the output voltage will no longer be regulated until the
junction temperature drops under the falling threshold.
Output Short Protection
When output short to ground, the system will be latched
and the output voltage will no longer be regulated until
power reset.
CC/CV/TR Multi Loop Controller
There are constant current loop, constant voltage loop and
thermal regulation loop to control the charging current.

VMID OVP
If the internal voltage (VMID) is higher than the threshold
voltage VOVP, the internal OVP signal will go high and the
charger will stop charging until VMID is below
VOVP −ΔVOVP.
OCP
The converter senses the current signal when the highside P-MOSFET turns on. As a result, The OCP is cycle
by-cycle current limitation. If the OCP occurs, the converter
holds off the next on pulse until inductor current drops
below the OCP limit.

DS9480-04

OTP

December 2014

Too Hot or Too Cold
The temperature sense input TS pin can be connected a
thermistor to determine whether the battery is too hot or
too cold for charging operation. If the battery's temperature
is out of range, charging is paused until it re-enters the
valid range.

is a registered trademark of Richtek Technology Corporation.

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5

RT9480
Absolute Maximum Ratings















(Note 1)

Supply Voltage, VBAT -------------------------------------------------------------------------------------- −0.3V to 6V
Supply Voltage, VBUS ------------------------------------------------------------------------------------- −0.3V to 10V
Supply Voltage USBOUT1, USBOUT2 Pulse (100μs) ---------------------------------------------- −0.3V to 10V
LED Output Voltage, LED1, LED2, LED3, LED4 ---------------------------------------------------- −0.3V to 10V
TORCH --------------------------------------------------------------------------------------------------------- −0.3V to 10V
Other Pins ----------------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, PD @ TA = 25°C
WQFN-24L 4x4 ---------------------------------------------------------------------------------------------- 3.57W
Package Thermal Resistance (Note 2)
WQFN-24L 4x4, θJA ----------------------------------------------------------------------------------------- 28°C/W
WQFN-24L 4x4, θJC ---------------------------------------------------------------------------------------- 7.1°C/W
Junction Temperature Range ------------------------------------------------------------------------------ 150°C
Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------- 260°C
Storage Temperature Range ------------------------------------------------------------------------------ −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) -------------------------------------------------------------------------------- 2kV
MM (Machine Model) --------------------------------------------------------------------------------------- 200V

Recommended Operating Conditions




(Note 4)

Supply Input Voltage, VBAT, VBUS --------------------------------------------------------------------- 2.8V to 5.5V
Junction Temperature Range ------------------------------------------------------------------------------ −40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------ −40°C to 85°C

Electrical Characteristics
TOP Unit Electrical Characteristics
(VBUS = 5V, VBAT = 3.7V, TA = 25°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

A

Supply Input
Battery Quiescent Current
IBAT_sdy
for Standby

No VBUS, Boost
on, Indicator Off.

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Button Mode

is a registered trademark of Richtek Technology Corporation.

DS9480-04

December 2014

RT9480
Charger Unit Electrical Characteristics
(VBUS = 5V, VBAT = 3.7V, TA = 25°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Supply Input
VBUS  VBAT VOS Rising

VOS_H

100

200

VBUS  VBAT VOS Falling

VOS_L

VBUS Operating Range

VBUS_CHG

4.5

5.5

VBUS Regulation

DPM

VDPM = 4.5V

5

VBAT Regulation

VREG

TA = 0 to 85C, VREG = 4.2V

1

Re-Charge Threshold

VRECHG

VREG  Recharge Level

150

VBUS Power FET RDS(ON)

RDS(ON)_chg IBAT = 1A

200

300

m

Battery Charger

Voltage Regulation

Current Regulation
Fast-Charge Current Accuracy ICHG

ICHG = 1.2A

5

Pre-Charge Current Accuracy

ICHG_Pre

Ratio of Fast-Charge Current

5.5

14.5

Pre-Charge Threshold

Vpre

VBAT Rising

2.35

2.5

2.65

Pre-Charge Threshold
Hysteresis

Vpre

VBAT Falling

120

200

280

ITERMI

TF_CC

hour

Charge Termination Detection
Termination Current Ratio
Timer
Fast-Charge Time Fault

Boost Unit Electrical Characteristics
(VBUS = 5V, VBAT = 3.7V, TA = 25°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Supply Input
Output Voltage

VOUTBST

5.1

Output Voltage Accuracy

VOUTBST

5

2.5

IOCP

f SW

0.2

0.25

0.3

MHz

Over-Voltage Protection

VMID_OVP

5.6

5.7

Over-Voltage Protection
Hysteresis

VMID_OVP_hys

0.2

Under-Voltage Protection
(Short-Circuit Protection)

VBST_FBUV

3.37

MAX Output Current
PFET Peak Current Limit

As VBAT > 3.3V, VOUT = 5V

Power Switch
Switching Frequency
Protection

DS9480-04

December 2014

is a registered trademark of Richtek Technology Corporation.

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7

RT9480
Others Electrical Characteristics
(VBUS = 5V, VBAT = 3.7V, TA = 25°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

0.75

200

LED
LED Current Sink

ILED

Torch
Open-Drain Low Voltage

VODL_T

ISINK = 5mA

Button
Button Control
Press Duty
Time

Logic-High

VIH_B

1.5

Logic-Low

VIL_B

0.4

High-Level

TPress_H

0.1

sec

Low-Level

TPress_L

0.1

sec

105

°C

Protection
Charger Thermal Regulation

TREG

For Charger

Over-Temperature Protect

TOTP

150

°C

Over-Temperature Protect
Hysteresis

TOTP

°C

VBUS OVP Threshold Voltage

VOVP

VBUS Rising

6.5

6.8

7.1

VBUS OVP Threshold Voltage
Hysteresis

VOVP_Hys

VBUS Falling

200

280

VBUS Attached Threshold
Voltage

VBUS_ATT

VBUS Rising

3.8

4.2

VBUS Attached Threshold
Voltage Hysteresis

VBUS_ATT_Hys

VBUS Falling

200

280

BASE

Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.

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is a registered trademark of Richtek Technology Corporation.

DS9480-04

December 2014

RT9480
Typical Application Circuit
RT9480
24

Input Power

VBUS

VBAT

CIN
1µF/25V

CBAT
10µF
16
19

SWIN2
VMID

USBOUT1

2
17, 18

CVMID
22µF x2

COUT1
1µF
USBOUT2

L1
1µH
VBAT
C1
10µF

20, 21
22, 23

LXBST
3

LED3 5

10 R1

LED1

PGNDBST

11 BUTTON
TP1

R3 100k 13
TP2
9, 25 (Exposed Pad)

LED4
TORCH

December 2014

Li-Bat
Prot-IC

N-MOSFET

USB2
Output

Power
Display

VMID

GND

DS9480-04

USB1
Output

RNTC
10k
Semitec
103AT

VBAT

Button
R2 100k 12

15
COUT2
1µF

LED2
VBAT

+
-

is a registered trademark of Richtek Technology Corporation.

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9

RT9480
Typical Operating Characteristics
USBOUT Voltage vs. Load Current

USBOUT Efficiency vs. Load Current
6.0

100
90

5.5

Efficiency (%)

Output Voltage (V)

VBAT = 3.9V
VBAT = 3.7V
VBAT = 3.3V

60
50
40
30
20

5.0

VBAT = 3.3V
VBAT = 3.7V
VBAT = 3.9V

4.5
4.0
3.5

USBOUT = 5.1V

USBOUT = 5.1V, L = 1μH, COUT = 1μF
3.0

0
0

500

1000

1500

2000

2500

500

1000

USBOUT Voltage vs. Temperature

2500

VBUS OVP Threshold Voltage vs. Temperature

5.5

7.2

OVP Threshold Voltage (V)

5.4
5.3

Output Voltage (V)

2000

Load Current (mA)

5.2
5.1
5.0

VBAT = 3.3V
VBAT = 3.7V
VBAT = 3.9V

4.9
4.8
4.7
4.6
-50

-25

100

7.0

Rising

6.8
6.6

Falling

6.4
6.2

VBAT = Real Battery

USBOUT = 5.1V

6.0

4.5

-50

125

-25

Battery Regulation Voltage vs. Temperature

4.22

105°C
4.19

4.16

4.13

VIN = 5V, VBAT = Real Battery
4.10
-50

-25

100

Temperature (°C)

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10

125

100

125

ICHG Thermal Regulation vs. Temperature
ICHG Thermal Regulation (mA)

4.25

Temperature (°C)

Battery Regulation Voltage (V)1

1500

1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0

VIN = 5V, VBAT = Real Battery
-50

-25

100

125

Temperature (°C)

is a registered trademark of Richtek Technology Corporation.

DS9480-04

December 2014

RT9480
Application Information
The RT9480 is a high integrated IC for Li-Ion battery power
bank. This chip includes a linear charger, a synchronous
Boost, two output load management, LED indicator and
torch function.
Pre-Charge Mode

battery in order to maintain thermal regulation at around
105°C. This operation continues until the junction
temperature falls below the thermal regulation threshold
(105°C) by the hysteresis level. This feature prevents the
maximum power dissipation from exceeding typical design
conditions.

When the output voltage is lower than 2.3V, the charging
current will be reduced to a fast-charge current ratio to
protect the battery life time.

Time Fault

Fast-Charge Mode

When time fault happens, the charger cycle will be turned
off charging function.

When the output voltage is higher than 2.5V, the charging
current will be equal to the fast-charge current with 1.2A.
Constant-Voltage Mode
When the output voltage is near 4.2V or 4.35V, the charging
current will fall below the termination current.
Re-Charge Mode
When the chip is in charge termination mode, the charging
current will gradually go down to zero. However, once the
voltage of the battery drops to below 4.05V or 4.2V, then
the charging current will resume again.
Charge Termination
When the charge current is lower than the charge
termination current ratio (10%) for VBAT > 4.05V or 4.2V
and the time is larger than the deglitch time (25ms), it will
be latched high unless the power is re-toggled.

The Fast-Charge Fault Time is set by 24hours.

Battery Pack Temperature Monitoring
The RT9480 features an external battery pack temperature
monitoring input. The TS input connects to the NTC
thermistor in the battery pack to monitor battery
temperature and prevent danger over temperature
conditions. If at any time the voltage at TS falls outside of
the operating range, charging will be suspended. The NTC
thermistor recommends using 10kΩ.
JEITA Function
For JEITA battery temperature standard :
CV regulation voltage will change at the following battery
Temp ranges 45°C to 60°C.

4.35V or 4.2V
4.2V or 4.05V

Input DPM Mode
If the input voltage is lower than VDPM (4.5V), the input
current limit will be reduced to stop the input voltage from
dropping any further. This can prevent the IC from damaging
improperly configured or inadequately designed USB
sources.
Temperature Regulation
In order to maximize charge rate, the RT9480 features a
junction temperature regulation loop. If the power
dissipation of the IC results in junction temperature greater
than the thermal regulation threshold (105°C), the RT9480
will cut back on the charge current and disconnect the
Copyright © 2014 Richtek Technology Corporation. All rights reserved.

DS9480-04

December 2014

100% Ichg
50% Ichg

0C

10C

45C 60C

Synchronous Step-Up
The converter operates in fixed frequency PWM Mode
with 250kHz, Continuous Current Mode (CCM), and
Discontinuous Current Mode (DCM) with internal
MOSFETs.

is a registered trademark of Richtek Technology Corporation.

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11

RT9480
Operation Method

Button Mode

Charge Mode : VBUS in and charging battery

Button mode : When external handheld device plug in for
power bank, the USBOUT will turns on by button.

Discharge Mode : USBOUT in and discharging for handheld
Chg-Dchg Mode : VBUS and USBOUT in, charging battery
and discharging handheld at the same time
Relax Mode : VBUS and USBOUT plug out

If device attched, RT9480 will count 12 hours
(RT9480GQW or AA02) or 3sec (AA01 or AA03) to turn
off USBOUT after detach.


AA01 and AA03. Please reference Product Name List.



Attach mean device plug in and loading > 100mA.



Detach mean device plug out and loading < 50mA.

Button Function

Function

Button

Action
Micro-USB Adapter
plug-in : ON

Charging

NA
Micro-USB Adapter
plug-out : OFF
USB slave plug-in : ON

Discharging

Check Battery
Capacity

Torch

0.1s

After unplugging the H/H device, the power bank stops
USB slave plug-out : OFF charging the device automatically without pressing the
button.
Press the button (short
press) one time : ON
After 20sec : OFF

0.1s 0.1s

Press the button (short press), the LED battery indicator
lights up.
After 20sec, the LED battery indicator fades out.

Double click the button
(short press) : ON

Double click the button (short press), the torch light lights
up.

Double click the button
(short press : OFF

Double click the button (short press) again, the torch light
fades out.

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Description
After plugging in the external power source, the power
bank will be charged automatically without pressing the
button, and the LED battery indicator lights up at the
same time.
After unplugging the external power source, the power
bank stops being charged automatically without pressing
the button, and the LED battery indicator fades out at the
same time.
After plugging in the H/H device and pressing the button,
the power bank starts to charge the device.

is a registered trademark of Richtek Technology Corporation.

DS9480-04

December 2014

RT9480
BUTTON Press Timing

LED Indicator Function

Define Button (Short/Long) Press Timing

About LED indicator, it will follow below table to show
SOC. The LED current is 0.75mA.

Short press = min (0.1s)

Blank = min (0.1s)

●●●●
Low→High
● : LED ON, ○ : LED OFF, ● : LED FLASH
Battery Voltage

SOC LED Flash and Running Timing

●○○○

SOC LED Flash

 3700mV

0.5s

Operation of Charging

●●○○
●●●○
●●●●

0.5s

 3700mV
 3940mV

SOC LED Running

●●○○
●●● ○
●●● ●

0.5s

 3940mV
 4100mV

●●● ●

0.5s

 4100mV
 4200mV

●●●●

4200mV

●●●●

Battery Voltage

Operation of Discharging

 4200mV
 3880mV

●●●●

 3880mV
 3720mV

●●●○

 3720mV
 3500mV

●●○○

 3500mV
 3200mV
 3200mV
 2800mV

DS9480-04

●●● ○

December 2014

●○○○
●○○○

is a registered trademark of Richtek Technology Corporation.

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13

RT9480
Thermal Considerations

Layout Consideration

For continuous operation, do not exceed absolute
maximum junction temperature. The maximum power
dissipation depends on the thermal resistance of the IC
package, PCB layout, rate of surrounding airflow, and
difference between junction and ambient temperature. The
maximum power dissipation can be calculated by the
following formula :

The PCB layout is an important step to maintain the high
performance of the RT9480.

PD(MAX) = (TJ(MAX) − TA) / θJA
where TJ(MAX) is the maximum junction temperature, TA is
the ambient temperature, and θJA is the junction to ambient
thermal resistance.
For recommended operating condition specifications, the
maximum junction temperature is 125°C. The junction to
ambient thermal resistance, θJA, is layout dependent. For
WQFN-24L 4x4 package, the thermal resistance, θJA, is

Both the high current and the fast switching nodes demand
full attention to the PCB layout to save the robustness of
the RT9480 through the PCB layout. Improper layout might
show the symptoms of poor line or load regulation, ground
and output voltage shifts, stability issues, unsatisfying
EMI behavior or worsened efficiency.For the best
performance of the RT9480, the following PCB layout
guidelines must be strictly followed.


Place the input and output capacitors as close as
possible to the input and output pins respectively for
good filtering.



Care should be taken for a proper thermal layout. Wide
traces, connecting with vias through the layers, provides
a proper thermal path to sink the heat energy created
from the device and inductor. Keep the main power traces
as wide and short as possible. Recommend as below :

28°C/W on a standard JEDEC 51-7 four-layer thermal test
board. The maximum power dissipation at TA = 25°C can
be calculated by the following formula :

VBUS trace > 40mil;

The maximum power dissipation depends on the operating
ambient temperature for fixed T J(MAX) and thermal
resistance, θJA. The derating curve in Figure 1 allows the
designer to see the effect of rising ambient temperature
on the maximum power dissipation.

LXBST trace > 80mil;

Maximum Power Dissipation (W)1

P D(MAX) = (125°C − 25°C) / (28°C/W) = 3.57W for
WQFN-24L 4x4 package

VBAT trace > 80mil;

VMID trace > 40mil;
USBOUT1 trace > 80mil;
USBOUT2 trace > 40mil.

4.0

Four-Layer PCB



The switching node area connected to LX and inductor
should be minimized for lower EMI.



Connect the GND pin, PGNDBST pin and Exposed Pad
together to a strong ground plane for maximum thermal
dissipation and noise protection.



Directly connect the output capacitors to the feedback
network of each channel to avoid bouncing caused by
parasitic resistance and inductance from the PCB trace.

3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0

100

125

Ambient Temperature (°C)

Figure 1. Derating Curve of Maximum Power Dissipation

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is a registered trademark of Richtek Technology Corporation.

DS9480-04

December 2014

RT9480
LX should be connected to Inductor by
wide and short trace, keep sensitive
compontents away from this trace
GND

CBAT

VMID

VBAT

Input capacitors
must be placed
as close as
possible to the
Input pins.

GND

CMID

GND C1

VBUS

PGNDBST

LXBST

VMID

L1
PGNDBST

VBUS

CIN

COUT1

VBAT 1

18 USBOUT1

17 USBOUT1

LED1

LED2

15 USBOUT2

LED3

14 NC

LED4

13 TP2

RNTC

VBAT

D1
D2
D3
D4

16 SWIN2

GND

USBOUT1

VMID

Output
capacitors must
be placed as
close as
possible to the
Output pins.

USBOUT2
COUT2

TORCH

BUTTON

TP1

GND

R3
7

GND

VMID

GND

Connect GND
Pin and PGND
Pin to Exposed
Pad.

Connect the Exposed Pad to a ground
plane.

Figure 2. PCB Layout Guide

DS9480-04

December 2014

is a registered trademark of Richtek Technology Corporation.

www.richtek.com
15

RT9480
Outline Dimension
D2

SEE DETAIL A
L
1

Symbol

DETAIL A
Pin #1 ID and Tie Bar Mark Options

A
A1

Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.

Dimensions In Millimeters

Dimensions In Inches

Min

Max

Min

Max

0.700

0.800

0.028

0.031

0.000

0.050

0.000

0.002

0.175

0.250

0.007

0.010

0.180

0.300

0.007

0.012

3.950

4.050

0.156

0.159

Option 1

2.400

2.500

0.094

0.098

Option 2

2.650

2.750

0.104

0.108

3.950

4.050

0.156

0.159

Option 1

2.400

2.500

0.094

0.098

Option 2

2.650

2.750

0.104

0.108

e
L

0.500
0.350

0.020
0.450

0.014

0.018

W-Type 24L QFN 4x4 Package

Richtek Technology Corporation
14F, No. 8, Tai Yuen 1st Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789
Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should
obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot
assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be
accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries.

www.richtek.com
16

DS9480-04

December 2014

www.s-manuals.com

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