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PDF UC3552 Data sheet ( Hoja de datos )

Número de pieza UC3552
Descripción PWM DC-DC CONVERTER
Fabricantes Unisonic Technologies 
Logotipo Unisonic Technologies Logotipo



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No Preview Available ! UC3552 Hoja de datos, Descripción, Manual

UNISONIC TECHNOLOGIES CO., LTD
UC3552
PWM DC-DC CONVERTER
WITH INTERNAL SWITCH AND
SOFT-START
„ DESCRIPTION
The UTC UC3552 is a step-up PWM DC-DC converter with a
internal switch which is 1.6A, 0.23. UTC UC3552 offers users
flexibility in determining loop dynamics and adjusting operating
frequency cause it’s equipped with an external compensation
pin ,and it also allows the use of small, low equivalent resistance
(ESR) ceramic output capacitors. UTC UC3552 is capable of
converting a standard input of 3.3V to multiple outputs of 8V, 8V ,
and 23V. Otherwise, filtering and loop performance are enhanced
and facilitated by a high switching frequency of either 640 kHz
or1.3MHz.
As a power-smart design in shutdown mode a soft-start with an
external capacitor that sets the input current ramp rate, reduces the
current consumption to 0.1μA. A mere 2.6V input yields an
impressive output voltage to 12V when operating.
„ FEATURES
* 1.6A, 0.23, internal switch
* High efficiency: 90%
* Adjustable output: VDD to 12V
* Adjustable frequency: 640kHz or 1.3MHz
* Wide input range: +2.6V ~ +5.5V
* Low shutdown current: 0.1μA
* Programmable soft-start
„ ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UC3552L-S08-R
UC3552G-S08-R
UC3552L-S08-T
UC3552G-S08-T
UC3552L-SM1-R
UC3552G-SM1-R
UC3552L-SM1-T
UC3552G-SM1-T
Package
SOP-8
SOP-8
MSOP-8
MSOP-8
CMOS IC
Packing
Tape Reel
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
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UC3552 pdf
UC3552
„ TYPICAL APPLICATION CIRCUIT
CMOS IC
VOUT
L 6.8μH
SW
D1
VDD
2.6V~5V
VDD
SHDN
ON/OFF
COUT
33μF
R1 274k
C1
3.3μF
C2
0.47μF
R2 44.2k
UTC
IN UC3552
SS
CSS
27nF
1.2MHz
GND
FREQ
EO 640KHz
CEO2
33pF
CEO
1.3nF
REO
47K
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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