G5616 Datasheet. Www.s Manuals.com. Gmt

User Manual: Marking of electronic components, SMD Codes 56, 56 **, 56**, 56-, 5601, 5601A, 5616, 5630, 56=**, 56A, 56R*, 56W, 56Y, 56Z*, 56p, 56s, 56t. Datasheets 1.5SMC56AT3, APL5156-33B, APL5156-50B, BAT17-06, BSR19, BZV49-C56, FDN5630, FSD273TA, G5601, G5601A, G5616R51U, G5616RZ1U, MM5Z4V3, NZQA5V6XV5T1G, PDTC115EK, RT8299GQW, RT8299ZQW, STN3456.

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G5616

Global Mixed-mode Technology

Complete DDR, DDRII and DDRIII Memory Solution
Synchronous Buck PWM Controller, 3A LDO,
Buffered Reference
Features
•Synchronous Buck Controller (VDDQ)











General Description
The G5616 is intended for DDR/SSTL-2, DDRII/SSTL-18 and DDRIII memory systems. It integrates a synchronous buck PWM controller with a 3-A
sink-source linear regulator and buffered reference.

Ultra-High Efficiency
No Current-Sense Resistor (Lossless ILIMIT)
Quasi-PWM with 100ns Load-Step Response
1.8V(DDRII) /1.5V(DDRIII) Fixed or Adjustable to
2.5V(DDR) or 0.75V to 3.6V Adjustable Output
Range
2V to 24V Battery Input Range
400kHz Switching Frequency
OVP & UVP of VDDQ Output
Drives Large Synchronous-Rectifier FETs
Power-Good Indicator

The PWM controller uses constant on-time control
scheme to handle wide input/output voltage ratios with
ease and provides 100ns “instant-on” response to
load transients while maintaining a relatively constant
switching frequency. The G5616 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode
PWMs. Efficiency is further enhanced by an ability to
drive very large synchronous rectifier MOSFETs. Single-stage buck conversion allows these devices to
directly step down high-voltage batteries for the highest possible efficiency.

•3-A LDO (VTT), Buffered Reference (VTTREF)












Support DDR (1.25 VTT) , DDR II (0.9 VTT) and
DDRIII(0.75 VTT) Requirements
VLDOIN Voltage Range: 1.2V to 3.6V
Requires Only 20µF Ceramic VTT Output Capacitance
Supports High-Z in S3 and Soft-Off in S5
Integrated Divider Tracks 1/2 VDDQSNS for
Both VTT and VTTREF
Remote Sensing (VTTSNS)
±20mV Accuracy for VTT and VTTREF
10mA Buffered Reference (VTTREF)
Built-In Soft-Start to Reduce the VLDOIN Surging Current
Over Current Protection of VTT Output
Thermal Shutdown Protection

The 3A sink/source tracking termination regulator is
specifically designed for low-cost/ low-external component count systems. The regulator contains a high
speed operational amplifier that provides fast load
transient response with only 20µF (2x10µF) of ceramic
output capacitance. The G5616 supports remote
sensing functions and all features required to power
the DDR /DDRII /DDRIII VTT bus termination according to the JEDEC specification. In addition, the G5616
includes integrated sleep-state controls placing VTT in
High-Z in S3 (suspend to RAM) and soft-off for VTT
and VTTREF in S5 (Shutdown).

Applications





The G5616 provides OVP, UVP, over current and
thermal shutdown protection functions and is available
in a 20-pin 3X3 TQFN package and 24-pin 4X4 TQFN
includes over voltage protection.

Notebook Computers
CPU Core Supply
Chipset/RAM Supply as Low as 0.75V
1.8V and 2.5V I/O Supply

Ordering Information
ORDER
NUMBER

MARKING

TEMP.
RANGE

PACKAGE
(Green)

G5616RZ1U
G5616R51U

5616
5616

-40°C to +85°C
-40°C to +85°C

TQFN3X3-20
TQFN4X4-24

Note: RZ: TQFN3X3-20
1: Bonding Code
U : Tape & Reel

R5: TQFN4X4-24

TEL: 886-3-5788833
http://www.gmt.com.tw

Ver: 1.4
Aug 26, 2011

1

G5616

Global Mixed-mode Technology

MODE

4

12

VPP

VTTREF

5

11

VCC

8

9

10

S3

PGOOD

7
VDDQSET

S5

6
VDDQSNS

G5616 TQFN3X3-20

BST

DH

LX

DL

22

20

19

VLDOIN
23

21

VTT
24
GND
MODE

4

VTTREF

5

14

VCC

NC

6

13

PGOOD

Thermal
Pad

12

CS

NC

13

Thermal
Pad

11

3

S5

GND

NC

3

9

PGND

17

10

14

2

S3

2

PGND

VTTSNS

VDDQSET

VTTSNS

18

8

15

1

VDDQSNS

1

VTTGND

7

LX
16

VTTGND

DL

NC

BST

DH
17

VLDOIN
19

18

VTT
20

Pin Configuration

16

CS

15

VPP

G5616 TQFN4X4-24

Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.

TEL: 886-3-5788833
http://www.gmt.com.tw

Ver: 1.4
Aug 26, 2011

2

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