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PDF L3380 Data sheet ( Hoja de datos )
| Número de pieza | L3380 | |
| Descripción | PWM STEP UP DC-DC CONTROLLER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de L3380 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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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
1 page  
L3380
APPLICATION CIRCUIT
L1
CDRH8D28-470
D1
M1FH3
VOUT
C2
VIN C1 Q1
FDN335N
EXT
L3380
R1 SHUTDOWN
VSS
CMOS IC
C3
F93 OUT
TEST CIRCUIT
1.
Oscilloscope
+
-
EXT
SHUTDOWN
VSS
VOUT
+
0.1u 47u
VIN
+
-
2.
VIN + + 47u
--
EXT
VOUT
SHUTDOWN
VSS
0.1u
+
47u -
v
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 9
QW-R502-099,A
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet L3380.PDF ] | |
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