G5380 [GMT]
High Efficiency 8A Synchronous Buck Converter for 5V System Power;
| 型号： | G5380 |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | High Efficiency 8A Synchronous Buck Converter for 5V System Power |
| 文件： | 总1页 (文件大小：59K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
G5380
Global Mixed-mode Technology
High Efficiency 8A Synchronous Buck Converter for
5V System Power
Features
General Description
Ultra-High Efficiency
G5380 is a 8A, synchronous DC/DC buck converter
with integrated 20mΩ N-channel high-side MOSFET
and 17mΩ 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
G5380 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 80mA for internal
circuit with automatic bootstrapping to DC/DC con-
verter output. The G5380 is intended for the 5V sys-
tem power supply of Notebook Computer. The G5380
is available in QFN4X4-28 package.
Low Quiescent Current of 40µA
Integrated 17mΩ 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
6V to 28V Adapter or Battery Input Range
Noiseless Pulse-skipping Mode (25kHz min)
VCLK Output
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
G5380QN1U
TEMP.
RANGE
PACKAGE
(Green)
MARKING
5380
-40°C to +85°C
QFN4X4-28
Note: QN: QFN4X4-28
1: Bonding Code
U : Tape & Reel
Pin Configuration
20
19
18
17
V+
V+
V+
V+
1
2
3
4
5
6
AGND
V+
V+
VCC
VCLK
PGND
LX
LX
LX
7
8
LX
G5380 QFN4X4-28
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.3
Oct 16, 2013
1
相关型号：
©2020 ICPDF网 联系我们和版权申明