G5695 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – 1.4MHz 1A Synchronous Step-Down Regulator

Global Mixed-mode Technology
G5695
1.4MHz 1A Synchronous Step-Down Regulator
Features
„ High Efficiency: Up to 93%
„ Low Quiescent Current: Only 50µA During Op-
eration
„ Internal Soft Start Function
„ 1A Output Current
„ 2.5V to 6V Input Voltage Range
„ 1.4MHz Switching Frequency
„ No Schottky Diode Required
„ 100% Duty Cycle in Dropout Operation
„ 0.6V Reference Allows Low Output Voltages
„ <1µA Shutdown Current
„ Current Mode Operation for Excellent Line and
Load Transient Response
„ Over Temperature Protected
„ RoHS Compliant
General Description
The G5695 is a high efficiency monolithic synchronous
buck regulator using a constant frequency, current
mode architecture. Supply current during operation is
only 50µA and drops to <1µA in shutdown. The 2.5V
to 6V input voltage range makes the G5695 ideally
suited for single Li-Ion battery-powered applications.
100% duty cycle provides low dropout operation, ex-
tending battery run time in portable systems. Switching
frequency is internally set at 1.4MHz, allowing the use
of small surface mount inductors and capacitors. The
internal synchronous switch increase efficiency and
eliminates the need for an external Schottky diode.
Built-in soft start function eliminates in-rush current
that could damage the system.
Applications
„ Cellular Telephones
„ Personal Information Appliances
„ Microprocessors and DSP Core Supplies
„ Wireless and DSL Modems
„ Digital Still and Video Cameras
„ MP3 Players
„ Portable Instruments
Ordering Information
ORDER
NUMBER
MARKING
OUTPUT
VOLTAGE
G5695T11U
5695x
Adjustable
G5695TO1U
5695x
Adjustable
G5695RB1U
Note:T1: SOT-23-5
1: Bonding Code
U: Tape & Reel
5695
TO:TSOT-23-5
Adjustable
RB: TDFN2X2-6
TEMP.
RANGE
-40°C~ +85°C
-40°C~ +85°C
-40°C~ +85°C
PACKAGE
(Green)
SOT-23-5
TSOT-23-5
TDFN2X2-6
Pin Configuration
Typical Application Circuit
G5695
G5695
VIN 1
5 LX
NC 1
6 VFB
GND 2
EN 2
Thermal
Pad
5 GND
VIN 3
4 LX
EN 3
4 VFB
TDFN2X2-6
SOT-23-5/TSOT-23-5
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
V_IN
4~6V
G5695
1
VIN
5
LX
C_IN
2.2µF
CER
3
EN
4
VFB
GND
2
R1
V_OUT = 0.6V × (1+ _R2 )
2.2µH
C_FB* (option)
R1
R2 82k
18k
V_OUT
3.3V
300mA
C_OUT
10µF
CER
Ver: 1.6
Apr 17, 2013
TEL: [phone]
http://www.gmt.com.tw
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