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PDF ( 数据手册 , 数据表 ) G5601A

零件编号 G5601A
描述 High-Speed Step-Down Controller
制造商 Global Mixed-mode Technology
LOGO Global Mixed-mode Technology LOGO 


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G5601A 数据手册, 描述, 功能
Global Mixed-mode Technology Inc.
G5601A
High-Speed Step-Down Controller with LDO Con-
troller for Notebook Computer
Features
--PWM Controller
„ Ultra-High Efficiency
„ No Current-Sense Resistor (Lossless ILIMIT)
„ Quasi-PWM with 100ns Load-Step Response
„ 1% VOUT Accuracy Over Line and Load
„ 0.75V to 3.6V Adjustable Output Range
„ 4.5V to 24V Battery Input Range
„ OVP & UVP
„ 1.7ms Soft-Start
„ Drives Large Synchronous-Rectifier FETs
„ Power-Good Indicator
--LDO Controller
„ 1.5% Accuracy Over Line and Load
„ Adjustable Output down to 0.75V
„ Independent Enable and Power Good Indicator
„ Drives N-channel MOSFET within Rail to Rail
Controller Voltage
„ MLCC and POSCAP Stable
Applications
„ Notebook Computers
„ CPU Core Supply
„ Chipset/RAM Supply as Low as 0.75V
„ 1.8V and 2.5V I/O Supply
„ Networking Power Supply
Pin Configuration
General Description
G5601A PWM controller uses constant on-time control
scheme to handle wide input/output voltage ratios with
ease and provides 100ns instant-onresponse to
load transients while maintaining a relatively constant
switching frequency. The G5601A achieves high effi-
ciency at a reduced cost by eliminating the cur-
rent-sense resistor found in traditional current-mode
PWMs. Efficiency is further enhanced by an ability to
drive very large synchronous rectifier MOSFETs. Sin-
gle-stage buck conversion allows these devices to
directly step down high-voltage batteries for the high-
est possible efficiency. Alternatively, two-stage con-
version (stepping down the +5V system supply instead
of the battery) at a higher switching frequency allows
the minimum possible physical size. The G5601A is
intended for CPU core, chipset, DRAM, or other
low-voltage supplies as low as 0.75V. G5601A LDO
controller can drive an external NMOSFET to provide
a second output voltage from PWM output or other
power source. It is adjusted output from 0.75V. The
independent enable input, open-drain power good in-
dicator, under-voltage protection and soft-start are
provided for system application.
The G5601A is available in 16-pin TQFN (3X3) package.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5601AR41U 5601A -40°C to +85°C TQFN3X3-16
Note:R4:TQFN3X3-16
1: Bonding Code
U : Tape & Reel
OUT 1
VCC 2
FB 3
PGOOD 4
17 GND
Ther mal
P ad
12 DH
1 1 LX
10 ILIM
9 VDD
Ver: 1.4
Feb 11, 2010
G5601A TQFN3X3-16
1
TEL: 886-3-5788833
http://www.gmt.com.tw












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