G5335 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – High Efficiency 10A Synchronous Buck Converter

Global Mixed-mode Technology
G5335
High Efficiency 10A Synchronous Buck Converter
Features
„ Ultra-High Efficiency
„ 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 I_LIMIT)
„ Quasi-PWM with 100ns Load-Step Response
„ 1% VOUT Accuracy Over Line and Load
„ Programmable Switching Frequency
„ Adjustable Output Range from 0.8V
„ 4.5V to 28V Adapter or Battery Input Range
„ Integrated Boost Switch
„ OVP & UVP
„ Over Temperature Protection (non-latch)
„ Adjustable Soft-Start
„ Power-Good Indicator
Applications
„ Notebook Computers
„ I/O Supply
„ Chipset/RAM Supply as Low as 0.8V
„ Networking Power Supply
General Description
G5335 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
G5335 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 G5335 is intended for the power supply of
Notebook Computer, or other low-voltage supplies as
low as 0.8V. The G5335 is available in QFN4X4-23
package.
Ordering Information
ORDER
NUMBER
G5335QT1U
Note: QT: QFN4X4-23
1: Bonding Code
U : Tape & Reel
Pin Configuration
MARKING
5335
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
QFN4X4-23
PGOOD 1
EN 2
PFM 3
V+
AGND 4
FB 5
TON 6
17 LX
16 LX
15 PGND
LX
14 PGND
13 PGND
12 PGND
Ver: 0.3
Jun 19, 2013
G5335 QFN4X4-23
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
TEL: [phone]
http://www.gmt.com.tw
1