G5001 Datasheet, PDF (1/2 Pages) Global Mixed-mode Technology Inc – 300kHz DC-DC Step-Down PWM Controller

Global Mixed-mode Technology Inc.
G5001
300kHz DC-DC Step-Down PWM Controller
Features
„ 3.3V, 2.5V, 1.8V Fixed Output or Adjustable
Version
„ External PMOS Switch
„ Available in SOT-23-5 Package
„ Input Range 2.5V~5.5V
„ Output Tolerance ±2.5%
„ Oscillator Frequency 300KHz, ±15%
„ Internal Soft-Start
„ Standby Current 0.5µA (Max)
„ 1V Reference Voltage for Adjustable Version
Applications
„ Electronics Information Organizers
„ Palmtops
„ Cellular and portable phones
„ Portable Audio Systems
„ Various Multi-function Power Supplies
General Description
The G5001 series are pure voltage-mode PWM
step-down DC/DC converter controllers with built-in
high speed low ON resistance drivers.
Large output currents are possible by using an exter-
nally connected transistor, coil, diode.
Output voltage is selectable for 1.8, 2.5V, 3.3V
(±2.5%). For other output voltages the FB version,
which has a 1V internal reference voltage, is available.
With built-in UVLO function, the external switch will be
forcibly switched off when used below the stipulated
voltage. An internal soft start is available and the soft
start time is set up internally.
Pin Configuration
Typical Application Circuit
V_DD
C_IN
47µF
EXT 1
VDD 2
G5001
T11
5 VOUT
(FB)
GND 3
SOT-23-5
4 CE
R_FB1
R_FB2
C_FB
VDD _EXT
FB _G5001
CE GND
M
L
D ^22µH
V_OUT
C_OUT
47µF
Output External Set-up Version
V_OUT = 1 • ( 1 +
R_FB1
R_FB2
)
CE 1
GND 2
G5001
T12
5 VDD
VOUT ³
(FB)
SOT-23-5
4 EXT
Ver: 0.7
Dec 06, 2006
V_DD
C_IN
47µF
VDD _EXT
VOUT _G5001
CE
GND
M
L
D 22µH
V_OUT
C_OUT
47µF
Output Internal Set-up Version
TEL: [phone]
http://www.gmt.com.tw
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