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High-Speed Step-Down Controller: Features General Description

The G5602 is a high-speed step-down controller that provides ultra-high efficiency power conversion for applications such as notebook computers, CPUs, and networking equipment. It uses constant on-time control for wide input/output voltage ratios with 100ns load response and 1% output accuracy. The G5602 eliminates the need for a current-sense resistor to reduce costs and increase efficiency by up to 95%. It can regulate output voltages from 0.75V to 3.6V using battery inputs from 4.5V to 24V.

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354 views1 page

High-Speed Step-Down Controller: Features General Description

The G5602 is a high-speed step-down controller that provides ultra-high efficiency power conversion for applications such as notebook computers, CPUs, and networking equipment. It uses constant on-time control for wide input/output voltage ratios with 100ns load response and 1% output accuracy. The G5602 eliminates the need for a current-sense resistor to reduce costs and increase efficiency by up to 95%. It can regulate output voltages from 0.75V to 3.6V using battery inputs from 4.5V to 24V.

Uploaded by

edi purwanto
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Global Mixed-mode Technology G5602

High-Speed Step-Down Controller


Features General Description
 Ultra-High Efficiency G5602 uses constant on-time control scheme to han-
 No Current-Sense Resistor (Lossless ILIMIT) dle wide input/output voltage ratios with ease and pro-
 Quasi-PWM with 100ns Load-Step Response vides 100ns “instant-on” response to load transients
 1% VOUT Accuracy Over Line and Load while maintaining a relatively constant switching fre-
 0.75V to 3.6V Adjustable Output Range quency. The G5602 achieves high efficiency at a re-
 4.5V to 24V Battery Input Range duced cost by eliminating the current-sense resistor
 Integrated Boost Diode found in traditional current-mode PWMs. Efficiency is
 OVP & UVP
further enhanced by an ability to drive very large syn-
 1.7ms Soft-Start
chronous rectifier MOSFETs. Single-stage buck con-
 Drives Large Synchronous-Rectifier FETs
version allows these devices to directly step down
 Power-Good Indicator
high-voltage batteries for the highest possible effi-
ciency. Alternatively, two-stage conversion (stepping
down the +5V system supply instead of the battery) at
Applications a higher switching frequency allows the minimum pos-
 Notebook Computers sible physical size. The G5602 is intended for CPU
 CPU Core Supply core, chipset, DRAM, or other low-voltage supplies as
 I/O Supply low as 0.75V. The G5602 is available in 16-pin TQFN
 Chipset/RAM Supply as Low as 0.75V 3X3 and SSOP-16 package and includes over voltage
 Networking Power Supply protection.

Ordering Information
ORDER TEMP. PACKAGE
MARKING
NUMBER RANGE (Green)
G5602R41U 5602 -40°C to +85°C TQFN3X3-16
G5602S11U G5602 -40°C to +85°C SSOP-16
Note: R4:TQFN3X3-16 S1: SSOP-16
1: Bonding Code
U : Tape & Reel

Pin Configuration
EN_SKIP
TON

BST

G5602
NC

EN_SKIP 1 16 BST
15

13
16

14

TON 2 15 DH
OUT 1 12 DH
OUT 3 14 LX
VCC 2 11 LX
Thermal VCC 4 13 ILIM
Pad
FB 3 10 ILIM
FB 5 12 VDD

PGOOD 4 9 VDD PGOOD 6 11 DL

AGND 7 10 PGND
8
7
5

NC 8 9 NC
NC

AGND

PGND

DL

SSOP-16
G5602 TQFN3X3-16
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.

Ver:1.0 TEL: 886-3-5788833


Aug 29, 2011 http://www.gmt.com.tw
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