G5383 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – High Efficiency 8A Synchronous Buck Converter

Global Mixed-mode Technology
G5383
High Efficiency 8A Synchronous Buck Converter
Features
„ Ultra-High Efficiency
„ Low Quiescent Current of 30µA
„ Integrated 15mΩ at V5V=5V N-Channel MOSFET
for Low Side
„ Integrated 30mΩ at V5V=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 0.9V
„ 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
„ Fixed 5V, 10mA Linear Regulator
Applications
„ Networking Power Supply
„ I/O Supply
Ordering Information
ORDER
NUMBER
G5383QU1U
Note: QU: QFN3X3-24
1: Bonding Code
U : Tape & Reel
MARKING
5383
Pin Configuration
General Description
G5383 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
G5383 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 built-in 5V LDO supports 10mA for internal
circuits. The G5383 is intended for the power supply
as low as 0.9V. The G5383 is available in QFN3X3-24
package.
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
QFN3X3-24
AGND 1
V5V 2
V+ 3
PGOOD 4
EN 5
PGND 6
NC 7
19 V+
18 V+
V+
17 V+
16 LX
15 PGND
LX
14 PGND
13 PGND
Ver: 0.4
Nov 27, 2013
G5383 QFN3X3-24
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
TEL: [phone]
http://www.gmt.com.tw
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