G5602

G5602
Global Mixed-mode Technology
High-Speed Step-Down Controller
Features
General Description
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
Integrated Boost Diode
OVP & UVP
1.7ms Soft-Start
Drives Large Synchronous-Rectifier FETs
Power-Good Indicator
G5602 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 G5602 achieves high efficiency at a reduced cost by eliminating the current-sense resistor
found in traditional current-mode PWMs. Efficiency is
further enhanced by an ability to drive very large synchronous rectifier MOSFETs. Single-stage buck conversion allows these devices to directly step down
high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping
down the +5V system supply instead of the battery) at
a higher switching frequency allows the minimum possible physical size. The G5602 is intended for CPU
core, chipset, DRAM, or other low-voltage supplies as
low as 0.75V. The G5602 is available in 16-pin TQFN
3X3 and SSOP-16 package and includes over voltage
protection.
Applications
Notebook Computers
CPU Core Supply
I/O Supply
Chipset/RAM Supply as Low as 0.75V
Networking Power Supply
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5602R41U
G5602S11U
5602
G5602
-40°C to +85°C
-40°C to +85°C
TQFN3X3-16
SSOP-16
Note: R4:TQFN3X3-16
1: Bonding Code
U : Tape & Reel
S1: SSOP-16
BST
G5602
13
NC
14
EN_SKIP
15
16
TON
Pin Configuration
OUT
1
12
DH
VCC
2
11
LX
FB
3
10
ILIM
PGOOD
4
9
VDD
8
DL
7
PGND
6
AGND
NC
5
Thermal
Pad
EN_SKIP
1
16
BST
TON
2
15
DH
OUT
3
14
LX
VCC
4
13
ILIM
FB
5
12
VDD
PGOOD
6
11
DL
AGND
7
10
PGND
NC
8
9
NC
SSOP-16
G5602 TQFN3X3-16
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver:1.0
Aug 29, 2011
1