Global Mixed-mode Technology
G5332A
General Description
G5332A is a 8A, synchronous DC/DC buck converter
with integrated 30mΩ N-channel high-side MOSFET
and 15mΩ 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
G5332A 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 G5332A is intended for the power supply
of Notebook Computer, or other low-voltage supplies
as low as 0.75V. The G5332A is available in
QFN3X3-21 package.
High Efficiency 8A Synchronous Buck Converter
Features
Ultra-High Efficiency
Low Quiescent Current of 60µA
Integrated 15mΩ at VCC=5V N-Channel
MOSFET for Low Side
Integrated 30mΩ at VCC=5V N-Channel
MOSFET for High Side
No Current-Sense Resistor (Lossless I
LIMIT
)
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
3V to 28V Adapter or Battery Input Range
Integrated Boost Switch
OVP & UVP
Over Temperature Protection (non-latch)
2ms 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
G5332AQP1U
Note: QP: QFN3X3-21
1: Bonding Code
U : Tape & Reel
TON
MARKING
5332A
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
QFN3X3-21
BST
Pin Configuration
21
FB
V+
V+
20
19
17
V+
16
AGND
1
18
15
14
V+
13
V+
VCC
2
PGOOD
3
EN
4
PGND
PGND
5
6
AGND
V+
LX
10
11
LX
LX
PGND
PGND
LX
G5332A QFN3X3-21
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
PGND
12
7
8
9
V+
Ver: 0.7
Aug 26, 2013
TEL: 886-3-5788833
http://www.gmt.com.tw
1
