Document
Global Mixed-mode Technology
G5330A
High Efficiency 10A Synchronous Buck Converter for 5V System Power
Features
General Description
G5330A 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 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 G5330A achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. The built-in 5V LDO supports 80mA for internal circuit with automatic bootstrapping to DC/DC converter output. The G5330A is intended for the 5V system power supply of Notebook Computer. The G5330A is available in QFN4X4-28 package.
Ultra-High Efficiency Low Quiescent Current of 40µA Integrated 8.5mΩ at VCC=5V N-Channel MOSFET for Low Side Integrated 20mΩ at VCC=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 4.5V to 5.5V Adjustable Output Range 5.5V to 28V Adapter or Battery Input Range Integrated Boost Switch OVP & UVP Over Temperature Protection (non-latch) 3.3ms Soft-Start Power-Good Indicator Fixed 5V, 80mA Bootstrapped Linear Regulator
Applications
Notebook Computers I/O Supply Networking Power Supply
Ordering Information
ORDER NUMBER
G5330AQN1U Note: QN: QFN4X4-28 1: Bonding Code U : Tape & Reel
MARKING
5330A
TEMP. RANGE
-40°C to +85°C
PACKAGE (Green)
QFN4X4-28
PGOOD
Pin Configuration
LDO5
OUT
ON5
TON
BST
22
FB
27
28
26
25
24
23
21
NC
ENL AGND VCC PGND LX LX LX LX
1 2 3 4 5 6 7 8 9 10 13 14 15 11 12 16
20 19
V+ V+ V+ V+
AGND
V+
18 17
LX
PGND
PGND
PGND
PGND
PGND
G5330A QFN4X4-28
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
PGND
LX
LX
Ver: 1.0 Feb 14, 2014
TEL: 886-3-5788833 http://www.gmt.com.tw
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