SY6288 Datasheet. Www.s Manuals.com. R0.58 Silergy

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Application Note: AN_SY6288
Low Loss Power Distribution Switch
Preliminary Specification
General Description

Features

SY6288 is an ultra-low RDS(ON) switch with current
limiting function to protect the power source from over
current and short circuit conditions.

•
•
•
•

Ordering Information

•

SY6288□(□□)□
Temperature Code
Package Code
Optional Spec Code

•
•
•
•
•

Temperature Range: -40°C to 85°C
Ordering Number
SY6288AAAC
SY6288ACAC
SY6288AFAC
SY6288BAAC
SY6288BCAC
SY6288BFAC
SY6288CAAC
SY6288CCAC
SY6288CFAC
SY6288C1CAC
SY6288C2CAC
SY6288C4CAC
SY6288DAAC
SY6288DCAC
SY6288DFAC
SY6288D1AAC
SY6288D1CAC
SY6288D1FAC
SY6288D2CAC

Package type
SOT23-5
MSOP8
SO8
SOT23-5
MSOP8
SO8
SOT23-5
MSOP8
SO8
MSOP8
MSOP8
MSOP8
SOT23-5
MSOP8
SO8
SOT23-5
MSOP8
SO8
MSOP8

Note
0.6A/Active High
0.6A/Active High
0.6A/Active High
0.6A/Active Low
0.6A/Active Low
0.6A/Active Low
2A/Active High
2A/Active High
2A/Active High
1.5A/Active High
1.5A/Active High
2A/Active High
2A/Active Low
2A/Active Low
2A/Active Low
1.5A/Active Low
1.5A/Active Low
1.5A/Active Low
1.5A/Active Low

•
•

Distribution voltages: 2.5V to 5.5V
Over temperature shutdown and automatic
retry
Reverse blocking (no body diode)
At shutdown, OUT can be forced higher than
IN
Fault flag (OCB) output for over current and
fault conditions
Automatic output discharge at shutdown
Built-in softstart
0.4ms rise time
RoHS Compliant and Halogen Free
Two Enable polarities and three current levels
o SY6288A: Active High/0.6A
o SY6288B: Active Low/0.6A
o SY6288C: Active High/2A
o SY6288C1: Active High/1.5A
o SY6288C2: Active High/1.5A
o SY6288C4: Active High/2A
o SY6288D: Active Low/2A
o SY6288D1: Active Low/1.5A
o SY6288D2: Active Low/1.5A
Compact packages minimize board space:
SOT23-5, SO8, MSOP8
UL certification NO. 20100428-E333762
TUV certification NO. R501887690001

Typical Application Circuit

Note: A low-ESR 150uF aluminum electrolytic or
tantalum between VOUT and GND is strongly
recommended.

AN_SY6288 Rev. 0.58

Silergy Corp. Confidential-prepared for Customer Use Only

1

AN_SY6288
Pin Configurations (Top View)

SOT23-5

MSOP8

SO8

Part Number
Package type
SY6288AAAC
SOT23-5
SY6288ACAC
MSOP8
SY6288AFAC
SO8
SY6288BAAC
SOT23-5
SY6288BCAC
MSOP8
SY6288BFAC
SO8
SY6288CAAC
SOT23-5
SY6288CCAC
MSOP8
SY6288CFAC
SO8
SY6288C1CAC
MSOP8
SY6288C2CAC
MSOP8
SY6288C4CAC
MSOP8
SY6288DAAC
SOT23-5
SY6288DCAC
MSOP8
SY6288DFAC
SO8
SY6288D1AAC
SOT23-5
SY6288D1CAC
MSOP8
SY6288D1FAC
SO8
SY6288D2CAC
MSOP8
Note① : x=year code, y=week code, z= lot number code.

Top Mark
CWxyz
ABTxyz
AAJxyz
DBxyz
ABDxyz
AALxyz
DFxyz
ABUxyz
AAMxyz
ADKxyz
ADLxyz
AEXxyz
BUxyz
ABExyz
AANxyz
DSxyz
ACKxyz
ACJxyz
AEHxyz

①

Functional Pin Description
Pin Name
IN
GND
OUT
EN- SY6288A/C/C1/C2/C4
ENB- SY6288B/D/D1/D2
OCB

AN_SY6288 Rev. 0.58

Pin Number
(SO8, MSOP8)
2,3
1
6,7,8

Pin number
(SOT23-5)
5
2
1

4

4

5

3

Pin Description
Input pin
Ground pin
Output pin
ON/OFF control. Don’t float. EN:
high enable. ENB: low enable.
Open Drain Fault Flag

Silergy Corp. Confidential-prepared for Customer Use Only

2

AN_SY6288
Absolute Maximum Ratings (Note 1)
All pins-------------------------- -------------------------------------------------------------------------------- 6V
Power Dissipation, PD @ TA = 25°C SOT23-5/MSOP8/SO8--------------------------------------------- 0.4/0.5/0.65W
Package Thermal Resistance (Note 2)
SOT23-5/MSOP8/SO8, θ JA ------------------------------------------------------------------------ 250/150/90°C/W
SOT23-5/MSOP8/SO8, θ JC ------------------------------------------------------------------------ 130/ 65/ 45°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 2)
HBM (Human Body Mode) ----------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------ 200V

Recommended Operating Conditions (Note 3)
IN----------------------------------------------------------------------------------------------------------------- 2.5V to 5.5V
EN/ENB--------------------------------------------------------------------------------------------------------- -0.3V to VIN+0.3V
All other pins --------------------------------------------------------------------------------------------------- 0-5.5V
Junction Temperature Range -------------------------------------------------------------------------------- -40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------- -40°C to 85°C

AN_SY6288 Rev. 0.58

Silergy Corp. Confidential-prepared for Customer Use Only

3

AN_SY6288
Electrical Characteristics
(VIN = 5V, CL=1uF, per channel, TA = 25°C unless otherwise specified)

Parameter
Input Voltage Range

Symbol
VIN

Shutdown Input Current

ISHDN

Quiescent Supply Current

IQ

FET RON

RDS(ON)

Current Limit

ILIM

Short Circuit Output Current

IOS

Logic-Low
Voltage
Logic-High
Voltage
IN UVLO Threshold
IN UVLO Hysteresis
Turn-ON Time
OCB Low Resistance
OCB Delay Time
OUT Shutdown Discharge
Resistance
Thermal
Shutdown
Temperature
Thermal Shutdown Hysteresis

VIL

EN/ EN
Threshold

Test Conditions
Open load, switch off
Output grounded, switch off
Open load, switch on
SOT23-5(SY6288A/B/C/D/D1)
MSOP8 (SY6288A/B/C/C1/C4)
MSOP8 (SY6288C2/ D1/D2)
MSOP8 (SY6288D)
SO8( SY6288A/B/C/D/D1)
SY6288A/B
SY6288C/D
SY6288C1
SY6288C2/D2
SY6288D1
SY6288C4
MSOP8 (SY6288D),OUT
connected to GND device
enabled.

VIH
VIN,UVLO
VIN,HYS
TON

Min
2.5

Typ

60
60
50
57
65
0.8
2.1
1.6
1.5
1.6
2.5

0.1
0.1
32
80
80
70
70
85
1.2
2.9
2.4
1.75
2.5
2.9

1.2

1.8

Max
5.5
1
1
100
100
90
83
105
1.6
3.7
3.2
2
3.7
3.7

Unit
V
µA
µA
µA
mΩ
mΩ
mΩ
mΩ
mΩ
A
A
A
A
A
A

2.4

A

0.8

V

2

V

ROCB
TOCB_Delay

0.1
400
10
10

2.4

V
V
µs
Ω
ms

RDIS

10

Ω

TSD

150

°C

20

°C

RL=5 Ω, CL=1uF

Note 1: Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device.
These are for stress ratings. 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 for extended periods may remain possibility to affect device reliability.
Note 2: θ JA is measured in the natural convection at TA = 25°C on a low effective single layer thermal conductivity
test board of JEDEC 51-3 thermal measurement standard.
Note 3: The device is not guaranteed to function outside its operating conditions

AN_SY6288 Rev. 0.58

Silergy Corp. Confidential-prepared for Customer Use Only

4

AN_SY6288
Typical Operating Characteristics
(SY6288DFAC)

AN_SY6288 Rev. 0.58

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5

AN_SY6288

Output Fall Time vs. VIN
( RL=2.5Ω )

2400

Rise Time (us)

2100
1800
1500
1200

COUT=1uF

900

COUT=100uF

600

COUT=470uF

300
0
2.5

3

3.5

4

4.5

5

5.5

6

Current Limit (A)

VIN (V)

AN_SY6288 Rev. 0.58

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6

AN_SY6288
Block diagram

AN_SY6288 Rev. 0.58

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AN_SY6288
Operation
The SY6288 is a current limited P-channel MOSFET
power switch designed for high-side load-switching
applications. There is no parasitic body diode between
drain and source of the MOSFET, so the SY6288
prevents current flow from out to input when out being
externally forced to a higher voltage than vin when
chip is disabled.
Over-current protection
When the over-current condition is sensed, the gate
of the pass switch is modulated to achieve constant
output current. Under output short circuit conditions,
the normal current limit folded back 50%. If the over
current condition presists for a long enough time, the
junction temperature may exceed 150C, and overtemperature protection will shut down the part. Once
the chip temperature drops to 130C, the part will restart.
Fault Flag (OCB)
The OCB output is asserted (active low) when an
overtemperature shutdown condition is encountered or
after overcurrent condition persists for 10ms. The
output remains asserted until the overcurrent or
overtemperature condition is removed. Connecting a
heavy capacitive load to an enabled device can cause a
momentary overcurrent condition; however, no false
reporting on OCB occurs due to the 10-ms deglitch

circuit. OCB is not deglitched when the switch is
turned OFF due to an overtemperature shutdown.
Supply Filter Capacitor
In order to prevent the input voltage drooping during
hot-plug events, a 10uF ceramic capacitor form VIN to
GND is strongly recommended. However, higher
capacitor values could reduce the voltage droop on the
input further. Furthermore, an output short will cause
ringing on the input without the input capacitor. It
could destroy the internal circuitry when the input
transient exceed 6V which is the absolute maximum
supply voltage even for a short duration.
Output Filter Capacitor
Between VOUT and GND, a low-ESR 150uF
alumimum electrolytic or tantalum capacitor is strongly
recommended to meet the 330mV maximum droop
requirement. Standard bypass methods should be used
to minimize inductance and resistance between the
bypass capacitor and the downsteam connector. This
will reduce EMI and improve the transient performance.
If long cables are connected to the output terminals, an
anti-parallel schottky diode such as BAT54 is
suggested to be placed in parallel with the output
terminals to absorb the negative ringing due to the
cable inductance.

PCB Layout Guide
For best performance of the SY6288 , the following
guidelines must be strictly followed:

Locate the ceramic bypass capacitors as close as
possible to the VIN pins and VOUT pins of
SY6288.

Keep all VBUS traces as short and wide as possible
and use at least 2 ounce copper for all VBUS traces.
Place a ground plane under all circuitry to lower
both resistance and inductance and improve DC
and transient performance.
A low-ESR 150uF aluminum electrolytic or
tantalum capacitor between VOUT and GND is
strongly recommended.
Locate the output capacitor as close to the
connectors as possible to lower impedance(mainly
inductance) between the port and the capacitor
and improve transient performance.
Input and output capacitors should be placed
closed to the IC and connected to ground plane to
reduce noise coupling.

AN_SY6288 Rev. 0.58

Silergy Corp. Confidential-prepared for Customer Use Only

8

AN_SY6288
PCB Layout Guide(SO8)

PCB Top Over Layer (SO8)

PCB Bottom Layer (SO8)

PCB Top Layer (SO8)

AN_SY6288 Rev. 0.58

Silergy Corp. Confidential-prepared for Customer Use Only

9

AN_SY6288
SOT23-5 Package outline &
PCB layout design
0.55

1.50 - 1.70

0.80

2.70 - 3.00

2.40

2.80 - 3.10

0.30 - 0.50

0.95 TYP

0.3 - 0.6

0.01 - 0.1

0.1 - 0.15

0.25 REF

Recommended Pad Layout

1.0 - 1.3

0.95 TYP
1.90 TYP

Notes: All dimensions are in millimeters.
All dimensions don’t include mold
flash & metal burr.

AN_SY6288 Rev. 0.58

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10

AN_SY6288

5.40

3.80 - 4.00

1.27 TYP

5.80 - 6.20
6.10

1.55

SO8 Package outline & PCB
layout design

0.60

0.30 – 0.50

0.60 - 0.85

0.08 - 0.25

4.80 - 5.00
1.40 - 1.60

°
-8

0.25 base

0

45°

0.25 - 0.50

0.18 - 0.25

Recommended Pad Layout

1.27 (TYP)

Notes: All dimensions are in millimeters.
All dimensions don’t include mold
flash & metal burr.

AN_SY6288 Rev. 0.58

Silergy Corp. Confidential-prepared for Customer Use Only

11

AN_SY6288
MSOP8 Package outline & PCB
layout design

4.70-5.10

5.30

2.85-3.10

1.35

0.65

0.75-0.95

0.40-0.80

0.25 base

0.10-0.25

2.85-3.10

0.05-0.15

0.45
Recommended Pad Layout

0.65 (TYP)

Notes: All dimensions are in millimeters.
All dimensions don’t include mold
flash & metal burr.

AN_SY6288 Rev. 0.58

Silergy Corp. Confidential-prepared for Customer Use Only

12

AN_SY6288
Taping & Reel Specification
1. Taping orientation
SOT23-5
3.9/4.1

7.7/8.3

1.45/1.55

Feeding direction
SOP8
1.45/1.55

11.7/12.3

3.9/4.1

Feeding direction
MSOP8
1.45/1.55

11.7/12.3

3.9/4.1

Feeding direction
AN_SY6288 Rev. 0.58

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13

AN_SY6288
2. Carrier Tape & Reel specification for packages

Package
types

Tape width
(mm)

Pocket
pitch(mm)

Reel size
(Inch)

Reel
width(mm)

Trailer
length(mm)

Leader length
(mm)

Qty per
reel

SOT23-5

8

4

7"

8.4

280

160

3000

SOP8

12

8

13"

12.4

400

400

2500

MSOP8

12

8

13"

12.4

400

400

3000

3. Others: NA

AN_SY6288 Rev. 0.58

Silergy Corp. Confidential-prepared for Customer Use Only

14

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