G5338 [GMT]
High-Speed Step-Down Controller;
| 型号： | G5338 |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | High-Speed Step-Down Controller |
| 文件： | 总1页 (文件大小：65K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
G5338
Global Mixed-mode Technology
High-Speed Step-Down Controller
Features
General Description
Ultra-High Efficiency
G5338 uses constant on-time control scheme to han-
dle wide input/output voltage ratios with ease and pro-
vides 100ns “instant-on” response to load transients
while maintaining a relatively constant switching fre-
quency. The G5338 achieves high efficiency at a re-
duced cost by eliminating the current-sense resistor
found in traditional current-mode PWMs. Efficiency is
further enhanced by an ability to drive very large syn-
chronous rectifier MOSFETs. Single-stage buck con-
version allows these devices to directly step down
high-voltage batteries for the highest possible effi-
ciency. The noiseless pulse-skipping mode setting
maintains the switching frequency above 25kHz to
eliminates the audio noise. The G5338 is intended for
CPU core, chipset, DRAM, or other low-voltage sup-
plies as low as 0.5V. The G5338 is available in
TQFN2X2-12 package.
4700ppm/°C RDS(ON) Current Sensing ( without
Current-Sense Resistor )
Quasi-PWM with 100ns Load-Step Response
Built in 1% 0.5V Reference Voltage
0.5V to 3.3V Adjustable Output Range
4.5V to 28V Battery Input Range
Integrated Boost Diode
OVP & UVP
1.5ms Voltage Servo Soft-Start
Drives Large Synchronous-Rectifier FETs
Power-Good Indicator
Thermal Shutdown (Non-latch)
Applications
Notebook Computers
CPU Core Supply
I/O Supply
Chipset/RAM Supply as Low as 0.5V
Ordering Information
ORDER
NUMBER
G5338K71U
TEMP.
RANGE
PACKAGE
(Green)
MARKING
5338
-40°C to +85°C
TQFN2X2-12
Note: K7: TQFN2X2-12
1: Bonding Code
U : Tape & Reel
Pin Configuration
13 GND
1
2
3
PGOOD
EN
DL
LX
9
8
7
Thermal
Pad
DH
MODE
G5338 TQFN2X2-12
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.4
May 03, 2012
1
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