G5310
Global Mixed-mode Technology
High Efficiency 10A Synchronous Buck Converter
Features
General Description
Ultra-High Efficiency
G5310 is a 10A, synchronous DC/DC buck converter
with integrated 20mΩ N-channel high-side MOSFET
and 8.5mΩ N-channel low-side MOSFET. It uses con-
stant on-time control scheme to handle wide in-
put/output voltage ratios with ease and provides 100ns
“instant-on” response to load transients while main-
taining a relatively constant switching frequency. The
G5310 achieves high efficiency at a reduced cost by
eliminating the current-sense resistor found in tradi-
tional current-mode PWMs. Single-stage buck conver-
sion allows these devices to directly step down
high-voltage batteries for the highest possible effi-
ciency. The G5310 is intended for the power supply of
Notebook Computer, or other low-voltage supplies as
low as 0.75V. The G5310 is available in QFN4X4-28
and QFN5X5-32 package.
Integrated 8.5mΩ at VDD=5V N-Channel
MOSFET for Low Side
Integrated 20mΩ at VDD=5V N-Channel
MOSFET for High Side
No Current-Sense Resistor (Lossless ILIMIT)
Quasi-PWM with 100ns Load-Step Response
1% VOUT Accuracy Over Line and Load
Programmable Switching Frequency
0.75V to 3.6V Adjustable Output Range
4.5V to 28V Adapter or Battery Input Range
Integrated Boost Switch
OVP & UVP
Over Temperature Protection (non-latch)
3.3ms Soft-Start
Power-Good Indicator
Applications
Notebook Computers
I/O Supply
Chipset/RAM Supply as Low as 0.75V
Networking Power Supply
Ordering Information
ORDER
NUMBER
G5310QN2U
G5310QA1U
TEMP.
RANGE
PACKAGE
(Green)
MARKING
5310
5310
-40°C to +85°C
-40°C to +85°C
QFN4X4-28
QFN5X5-32
Note: QN: QFN4X4-28 QA: QFN5X5-32
1,2: Bonding Code
U : Tape & Reel
Pin Configuration
24
1
2
3
V+
1
20
19
18
17
ILIM
AGND
VDD
ILIM
AGND
VDD
PGND
LX
V+
V+
V+
V+
2
23
22
21
20
19
18
V+
AGND
V+
V+
AGND
3
4
5
6
7
8
V+
4
PGND
V+
5
6
7
8
PGND
PGND
PGND
LX
LX
LX
LX
LX
LX
LX
LX
LX
17 PGND
G5310 QFN5X5-32
G5310 QFN4X4-28
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.5
Apr 01, 2013
1