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PDF ( 数据手册 , 数据表 ) G5617A

零件编号 G5617A
描述 Programmable Output High-Speed Step-Down Controller
制造商 Global Mixed-mode Technology
LOGO Global Mixed-mode Technology LOGO 


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G5617A 数据手册, 描述, 功能
Global Mixed-mode Technology
G5617A/G5617B
Programmable Output High-Speed Step-Down
Controller for Notebook Computer
Features
„ 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
„ Dynamic Voltage Scaling by G0 and G1 Inputs
„ 4.5V to 24V Battery Input Range
„ OVP & UVP
„ Built-in BST Diode
„ 1.7ms Soft-Start
„ Drives Large Synchronous-Rectifier FETs
„ Power-Good Indicator
„ G0/G1 High Active (G5617A)
G0/G1 Low Active (G5617B)
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
Ordering Information
ORDER
NUMBER
G5617AR41U
G5617BR41U
Note:R4:TQFN3X3-16
1: Bonding Code
U: Tape & Reel
Pin Configuration
MARKING
5617A
5617B
General Description
G5617A/G5617B PWM controller uses constant
on-time control scheme to handle wide input/output
voltage ratios with ease and provides 100ns in-
stant-onresponse to load transients while maintaining
a relatively constant switching frequency. The
G5617A/G5617B 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. Alternatively, two-stage conversion (stepping
down the +5V system supply instead of the battery) at
a higher switching frequency allows the minimum pos-
sible physical size. The G5617A/G5617B is intended
for CPU core, chipset, DRAM, or other low-voltage
supplies as low as 0.75V. It provides four resis-
tor-programmable output voltages by G0 and G1 digi-
tal inputs.
The G5617A/G5617B is available in 16-pin TQFN (3X3)
package.
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
PACKAGE
(Green)
TQFN3X3-16
TQFN3X3-16
OUT 1
VCC 2
FB 3
PGOOD 4
17 GND
Thermal
Pad
12 DH
11 LX
10 ILIM
9 VDD
Ver: 1.0
Nov 09, 2011
G5617A/G5617B TQFN3X3-16
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
TEL: 886-3-5788833
http://www.gmt.com.tw
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零件编号描述制造商
G5617AProgrammable Output High-Speed Step-Down ControllerGlobal Mixed-mode Technology
Global Mixed-mode Technology
G5617BProgrammable Output High-Speed Step-Down ControllerGlobal Mixed-mode Technology
Global Mixed-mode Technology

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