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Gamma Microelectronics
Gamma Microelectronics

GM3326 Datasheet Preview

GM3326 Datasheet

STEP-UP & DOWN DC/DC CONVERTER CONTROLLER ICS

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GM3326 pdf
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Description
GM3326 is step-up/down DC/DC converter controller ICs
with fast, and low ON resistance drivers built-in. A versatile
step-up/ down DC/DC converter can be realised by using
with large output current only 4 basic external components
- transistors, coils, diodes, and capacitors.
Output voltage is selectable in 0.1V steps within a 2.4V ~
6.0V ( ± 2.5% accuracy) range, and switching frequency is
set at or 300KHz.
GM3326 switches from PWM to PFM control during light
loads, and the series offers high efficiencies from light
loads through to large output currents.
Soft-start time is internally set to 10 msec, which offers
protection against rush currents when the power is
switched on and also against voltage overshoot.
During shutdown (CE pin = L), consumption current can be
reduced to as little as 0.5µA or less.
Features
Input Voltage Range : 2.0V ~ 10V
Output Voltage Range : 2.4V ~ 6.0V ( ± 2.5%
accuracy) (selectable in 0.1V steps)
Oscillation Frequency : 300KHz ( ± 15%
accuracy)
Output Current : more than 250mA (VIN=2.4V,
VOUT=3.3V)
Efficiency : 81% (typ) at 5.0V, 78% (typ) at 3.3V
Stand-By : ISTB = 0.5µA (max)
Output Voltage Internal Set-Up
SOT-25 Package
Application
Mobile phones
PDAs
Palmtop computers
TYPICAL APPLICATION CIRCUITS
Portable audio equipment
Various power supplies
VOUT
Schottky
MBRS140
3L colis SMTSPR5D5047C-220
Youth coils YCDH57-220
L
Pch MOSFET
FDN338P
Nch MOSFET
FDN339AN
Schottky
MBRS140
VIN
+
CL
68µF/ 10V
Chemi_con
PT- Series
VOUT
EXT
GM3326 VDD
CE GND
+
CIN
100µF/ 10V
Chemi_con
PT- Series
www.gammamicro.com 1



Gamma Microelectronics
Gamma Microelectronics

GM3326 Datasheet Preview

GM3326 Datasheet

STEP-UP & DOWN DC/DC CONVERTER CONTROLLER ICS

No Preview Available !

GM3326 pdf
MARKING INFORMATION & PIN CONFIGURATIONS
SOT-25 (SOT-23-5)
CE VOUT
54
OAVYW
123
GND
VDD
EXT
OA: Device Code
V : Output Voltage
Y : Year
W : Weekly
ORDERING INFORMATION
Ordering Number
GM3326-2.5ST25R
GM3326-2.8ST25R
GM3326-3.0ST25R
GM3326-3.3ST25R
GM3326-3.5ST25R
GM3326-4.0ST25R
GM3326-4.5ST25R
GM3326-5.0ST25R
GM3326-5.5ST25R
GM3326-6.0ST25R
Output Voltage
2.5
2.8
3.0
3.3
3.5
4.0
4.5
5.0
5.5
6.0
Suffix
B
E
G
J
L
Q
V
A
F
K
Package
SOT-25
SOT-25
SOT-25
SOT-25
SOT-25
SOT-25
SOT-25
SOT-25
SOT-25
SOT-25
* For detail Ordering Number identification, please see last page.
Shipping
3,000 Units/ Tape & Reel
3,000 Units/ Tape & Reel
3,000 Units/ Tape & Reel
3,000 Units/ Tape & Reel
3,000 Units/ Tape & Reel
3,000 Units/ Tape & Reel
3,000 Units/ Tape & Reel
3,000 Units/ Tape & Reel
3,000 Units/ Tape & Reel
3,000 Units/ Tape & Reel
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VDD Pin Voltage
VOUT Pin Voltage
CE Pin Voltage
EXT/ Pin Voltage
EXT/ Pin Current
Power Dissipation
SYMBOL
VDD
VOUT
VCE
VEXT/
IEXT/
Pd
Operating Ambient Temp.
Topr
Storage Temp.
2
Tstg
RATINGS
-0.3 ~ 12
-0.3 ~ 12
-0.3 ~ 12
-0.3 ~ VDD +0.3
± 100
150
-40 ~ +85
-40 ~ +125
UNITS
V
V
V
V
mA
mW
°C
°C


Part Number GM3326
Description STEP-UP & DOWN DC/DC CONVERTER CONTROLLER ICS
Maker Gamma Microelectronics
Total Page 7 Pages
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