G5333 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – High Efficiency 8A Synchronous Buck Converter

Global Mixed-mode Technology
G5333
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
„ 0.9V to 5.5V 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
„ Fixed 5V, 10mA Linear Regulator
Applications
„ Networking Power Supply
„ I/O Supply
General Description
G5333 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
G5333 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 G5333 is intended for the power supply
as low as 0.9V. The G5333 is available in QFN3X3-21
package.
Ordering Information
ORDER
NUMBER
G5333QP1U
Note: QP: QFN3X3-21
1: Bonding Code
U : Tape & Reel
Pin Configuration
MARKING
5333
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
QFN3X3-21
AGND 1
V5V 2
PGOOD ³
EN 4
PGND 5
PGND 6
AGND
V+
LX
14 V+
13 _V+
Ver: 0.5
Aug 12, 2013
G5333 QFN3X3-21
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
TEL: [phone]
http://www.gmt.com.tw
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