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PDF G5601A Data sheet ( Hoja de datos )
| Número de pieza | G5601A | |
| Descripción | High-Speed Step-Down Controller | |
| Fabricantes | Global Mixed-mode Technology | |
| Logotipo |  |
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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-on” response 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
1 page | ||
| Páginas | Total 1 Páginas | |
| PDF Descargar | [ Datasheet G5601A.PDF ] | |
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