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L3380 Datasheet Preview

L3380 Datasheet

PWM STEP UP DC-DC CONTROLLER

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L3380 pdf
UNISONIC TECHNOLOGIES CO., LTD
L3380
PWM STEP UP DC-DC
CONTROLLER
CMOS IC
DESCRIPTION
The L3380 is PWM step up DC-DC switching controller that
operates from 0.9V. The low start up input voltage makes L3380
specially designed for powering portable equipment from one or two
cells battery packs. This device consist of a soft start circuit, a
reference voltage source, an error amplifier, an oscillator, a phase
compensation, a PWM controller and an output drive circuit for
driving external power transistor.
Additionally, a chip enable feature is provided to power down the
converter for extended battery life. The device features a voltage
mode PWM control loop, providing stable and high efficiency
operation over a broad load current range.
FEATURES
* 0.9V low start-up Input voltage at 1mA load
* Low operation current
* 0.5uA low shutdown current
* Fix requency PWM at 100KHZ
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* Built in PWM switching control circuit ,duty ratio is 0~83%
* Output voltage:0.1V step setting is available between 2.0V and
6.5V
* Soft start time: 6ms
* Shutdown function
APPLICATIONS
*Portable devices
*Electronic games
*Portable audio (MP3)
*Personal digital assistant (PDA)
*Digital still cameras(DSC)
*Camcorders
*White LED driver
*Single and dual-cell battery operated products
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
L3380-xx-AF5-R
L3380L-xx-AF5-R
Package
SOT-25
1
2
3
5
4
SOT-25
*Pb-free plating product number: L3380L
Packing
Tape Reel
L3380L-xx-AF5-R
(1)Packing Type
(2)Package Type
(3)Output Voltage Code
(4)Lead Plating
(1) R: Tape Reel
(2) AF5: SOT-25
(3) xx: refer to Marking Information
(4) L: Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw
Copyright © 2006 Unisonic Technologies Co., Ltd
1 of 9
QW-R502-099,A



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L3380 Datasheet Preview

L3380 Datasheet

PWM STEP UP DC-DC CONTROLLER

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L3380 pdf
L3380
MARKING INFORMATION
PACKAGE VOLTAGE CODE
SOT-25
18:1.8V
21:2.1V
25:2.5V
27:2.7V
30:3.0V
33:3.3V
40:4.0V
50:5.0V
MARKING
321
Voltage Code
H0
Lead Plating
45
PIN DESCRIPTION
PIN NAME
FUNCTION
1
SHUTDOWN
Shutdown control input, “H” : normal operation
“L” : stop step up( whole circuit stop).
2
VOUT
Power supply and voltage output.
3 NC No connection.
4 VSS Ground.
5 EXT Switching the circuit by connecting to a transistor.
CMOS IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 9
QW-R502-099,A


Part Number L3380
Description PWM STEP UP DC-DC CONTROLLER
Maker UTC
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