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.
Open the PDF directly: View PDF 
.
Page Count: 3
Ver: 1.4
Aug 26, 2011 TEL: 886-3-5788833
http://www.gmt.com.tw
1
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)
Ultra-High Efficiency
No Current-Sense Resistor (Lossless I
LIMIT
)
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
•
••
•
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 Ca-
pacitance
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 Surg-
ing Current
Over Current Protection of VTT Output
Thermal Shutdown Protection
Applications
Notebook Computers
CPU Core Supply
Chipset/RAM Supply as Low as 0.75V
1.8V and 2.5V I/O Supply
General Description
The G5616 is intended for DDR/SSTL-2, D-
DRII/SSTL-18 and DDRIII memory systems. It inte-
grates a synchronous buck PWM controller with a 3-A
sink-source linear regulator and buffered reference.
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 effi-
ciency at a reduced cost by eliminating the cur-
rent-sense resistor found in traditional current-mode
PWMs. Efficiency is further enhanced by an ability to
drive very large synchronous rectifier MOSFETs. Sin-
gle-stage buck conversion allows these devices to
directly step down high-voltage batteries for the high-
est possible efficiency.
The 3A sink/source tracking termination regulator is
specifically designed for low-cost/ low-external com-
ponent 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 accord-
ing 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).
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.
Ordering Information
ORDER
NUMBER MARKING TEMP.
RANGE PACKAGE
(Green)
G5616RZ1U 5616 -40°C to +85°C TQFN3X3-20
G5616R51U 5616 -40°C to +85°C TQFN4X4-24
Note: RZ: TQFN3X3-20 R5: TQFN4X4-24
1: Bonding Code
U : Tape & Reel
Ver: 1.4
Aug 26, 2011 TEL: 886-3-5788833
http://www.gmt.com.tw
2
G5616
Global Mixed-mode Technology
Pin Configuration
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
G5616 TQFN4X4-24
VTTGND
VTTSNS
GND
MODE
VTTREF
NC
PGND
NC
CS
VPP
VCC
PGOOD
1
2
3
4
5
613
14
15
16
17
18
24
19
21
23
22
NC
8
7
9
10
11
12
Thermal
Pad
S5
S3
VDDQSET
VDDQSNS
NC
DL
LX
DH
BST
VLDOIN
VTT
20
G5616 TQFN3X3-20
1
2
3
4
511
12
13
14
15
16
17
18
20
19
8
7
9
10
Thermal
Pad
6
VTTGND
VTTSNS
GND
MODE
VTTREF
S5
S3
VDDQSET
VDDQSNS
PGND
CS
VPP
VCC
PGOOD
DL
LX
DH
BST
VLDOIN
VTT
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
G5616 TQFN4X4-24
VTTGND
VTTSNS
GND
MODE
VTTREF
NC
PGND
NC
CS
VPP
VCC
PGOOD
1
2
3
4
5
613
14
15
16
17
18
24
19
21
23
22
NC
8
7
9
10
11
12
Thermal
Pad
S5
S3
VDDQSET
VDDQSNS
NC
DL
LX
DH
BST
VLDOIN
VTT
20
G5616 TQFN3X3-20
1
2
3
4
511
12
13
14
15
16
17
18
20
19
8
7
9
10
Thermal
Pad
6
VTTGND
VTTSNS
GND
MODE
VTTREF
S5
S3
VDDQSET
VDDQSNS
PGND
CS
VPP
VCC
PGOOD
DL
LX
DH
BST
VLDOIN
VTT
