UC3550G-XX-AF5-R UTC [Unisonic Technologies], UC3550G-XX-AF5-R Datasheet

UC3550G-XX-AF5-R

Manufacturer Part Number

UC3550G-XX-AF5-R

Description

PWM CONTROLLED,PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER

Manufacturer

UTC [Unisonic Technologies]

Datasheet

1.UC3550G-XX-AF5-R.pdf (10 pages)

Current page: 1 of 10
Download datasheet (369Kb)

UC3550

PWM CONTROLLED， PWM/PFM

SWITCHABLE STEP-UP DC-DC

CONTROLLER

DC/DC controllers includes an error amplifier, oscillator, PWM

comparator, skip cycle comparator, voltage reference, soft-start, and

high speed lower ON-resistance driver for driving external power

devices (NMOS or NPN) ,Additionally, a CE (chip enable) function that

reduces power consumption during shut-down mode.

have a driver pin ,ext pin, for connecting to an external transistor(NMOS

or NPN). a lower ON-resistance external transistor can obtain larger

output current. With only external components, this series allow a

simple means to accommodate high output current applications.

cycles under light load condition to maintain high efficiency.

* Input Voltage Range：0.9~8V

* Output Voltage Range：1.8~6V Programmable in 0.1V with High

* High Efficiency 88% (Typ.)

* Low Start-up Voltage of 0.9V Typical at I

* Oscillator Frequency: 300kHz.(±20%)

* Chip Enable Pin with Pull-up Current Source

* High Output Current up to 1000mA (V

www.unisonic.com.tw

Accuracy ± 2.5%

The UTC UC3550 series is a compact, high efficiency, step-up

That typically operated from a single-or dual-cell battery packs. It

The UTC UC3550 series goes automatically into skip switching

ORDERING INFORMATION

FEATURES

DESCRIPTION

UC3550G-xx-AF5-R

Order Number

UNISONIC TECHNOLOGIES CO., LTD

= 2.0V, V

OUT

Package

SOT-25

= 1.0mA

OUT

=3.3V)

Tape Reel

Packing

SOT-25

QW-R502-082,B

CMOS IC

1 of 10

Related parts for UC3550G-XX-AF5-R

UC3550G-XX-AF5-R Summary of contents

Page 1

... Accuracy ± 2.5% * High Efficiency 88% (Typ.) * Low Start-up Voltage of 0.9V Typical Oscillator Frequency: 300kHz.(±20%) * Chip Enable Pin with Pull-up Current Source * High Output Current up to 1000mA (V ORDERING INFORMATION Order Number UC3550G-xx-AF5-R www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd = 1.0mA OUT = 2.0V, V =3.3V) IN ...

Page 2

UC3550 MARKING INFORMATION PACKAGE VOLTAGE CODE SOT- PIN CONFIGURATION PIN DESCRIPTION PIN NO PIN NAME Chip Enable The chip is enabled if a voltage ...

Page 3

UC3550 BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw CMOS QW-R502-082,B ...

Page 4

UC3550 ABSOLUTE MAXIMUM RATING PARAMETER Supply Voltage EXT Voltage EXT Sink/Source Current CE Input Voltage Range CE Input Current Range Power Dissipation (Ta=25°C) Junction Temperature Operating Temperature Storage Temperature Note: Absolute maximum ratings are those values beyond which the device ...

Page 5

UC3550 ELECTRICAL CHARACTERISTICS (Cont.) UC3550-5.0V PARAMETER OSCILLATOR Frequency Frequency Temperature Coefficient Maximum PWM Duty Cycle Minimum Start-up Voltage Minimum Start-up Voltage Minimum Start-up Voltage Temperature Coefficient Minimum Operation Hold Voltage Soft-Start Time CE (PIN 1) CE Input Voltage : High ...

Page 6

UC3550 TYPICAL STEP-UP CONVERTER APPLICATION V IN 10uF 0.1µ Step-up Converter using external MOSFET V IN 10uF 0.1µ Recommended components Nmos t ：XP161A0390PR/ (Torex) or NTGS3446T1(ON SEMI ：10Uh(Sunida CD54 fosc＝300kHz) SD ：MA737, or MBRM110L C ：10V 10uF (tantalum) ...

Page 7

UC3550 EXTERNAL COMPONENT SELECTION Inductor Selection An inductor value of 10uH performs well in most application. The UC3550 series also work with inductors in the 4.7uH to 12uH range. An inductor with higher peak inductor current tends a higher output ...

Page 8

UC3550 TYPICAL CHARACTERISTICS No Load Input Current vs. Input Voltage (Using MOSFET OUT 0.1 V OUT 0. Input Voltage, V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 100 10 =5.0V 0.1 =3.0V 0. (V) ...

Page 9

UC3550 TYPICAL CHARACTERISTICS(Cont.) Efficiency vs Output Current (5.0V) 100 V =3. =2. =0. 0 Output Current, I EXT ON-Resistance vs Temperature =5.0V×0.96 ...

Page 10

UC3550 TYPICAL CHARACTERISTICS(Cont.) UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and ...

Related keywords

UC3550G-XX-AF5-R datasheet
UC3550G-XX-AF5-R data sheet
UC3550G-XX-AF5-R pdf datasheet
UC3550G-XX-AF5-R component
UC3550G-XX-AF5-R part
UC3550G-XX-AF5-R distributor
UC3550G-XX-AF5-R RoHS
UC3550G-XX-AF5-R datasheet download