UC3500G-XX-AB3-R UTC [Unisonic Technologies], UC3500G-XX-AB3-R Datasheet

UC3500G-XX-AB3-R

Manufacturer Part Number

UC3500G-XX-AB3-R

Description

HIGH EFFICIENCY VFM CONTROLLED STEP-UP DC/DC CONVERTER

Manufacturer

UTC [Unisonic Technologies]

Datasheet

1.UC3500G-XX-AB3-R.pdf (12 pages)

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UC3500

HIGH EFFICIENCY VFM

CONTROLLED STEP-UP

DC/DC CONVERTER

for applications that prioritize high efficiency and high frequency.

The efficiency is greatly improved by utilizing an internal VFM

controlled scheme that switches with fixed frequency and is

adjustable up to more than 150 KHz depending on the load.

to realize the conversion from the battery voltage to the selected

output voltage in the range of 2.5V ~ 5.5V.

and the device is operating down to 0.5V. The Output current is

guaranteed up to 150mA, while quiescent current is only 18μA.

* 0.8V start-up voltage

* 0.5V hold-on voltage

* Output current up to 150mA

* Low supply current of 18μA

* Wide output voltage range of 2.5V~5.5V

* Output voltage accuracy ±2%

* High efficiency up to 88%

* Low profile and minimum external components

www.unisonic.com.tw

UC3500L-xx-AB3-R

UC3500L-xx-AE3-R

The UTC UC3500 Step-up DC/DC converters are optimized

The UTC UC3500 requires only three external components

The start-up voltage of UTC UC3500 is guaranteed at 0.8V

ORDERING INFORMATION

UC3500L-xx-AF5-R

DESCRIPTION

FEATURES

Lead Free

UNISONIC TECHNOLOGIES CO., LTD

Ordering Number

UC3500G-xx-AB3-R

UC3500G-xx-AE3-R

UC3500G-xx-AF5-R

Halogen Free

Package

SOT-89

SOT-23

SOT-25

Tape Reel

Packing

CMOS IC

QW-R502-072,D

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UC3500G-XX-AB3-R Summary of contents

Page 1

... Wide output voltage range of 2.5V~5.5V * Output voltage accuracy ±2% * High efficiency up to 88% * Low profile and minimum external components ORDERING INFORMATION Ordering Number Lead Free UC3500L-xx-AB3-R UC3500G-xx-AB3-R UC3500L-xx-AE3-R UC3500G-xx-AE3-R UC3500L-xx-AF5-R UC3500G-xx-AF5-R www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd Package ...

Page 2

UC3500 MARKING INFORMATION PACKAGE VOLTAGE CODE SOT- SOT- ...

Page 3

UC3500 BLOCK DIAGRAM OUT AMPLIFIER VREF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw OSCILLATOR ERROR VFM CONTROL VI LIMITER X GND CMOS IC OUT QW-R502-072.D ...

Page 4

UC3500 ABSOLUTE MAXIMUM RATING PARAMETER Output Voltage Input Voltage LX Pin Voltage LX Pin Output Current Power Dissipation at 25°С SOT-23/SOT-25 Derating Rate Ta>25°С Operating Junction Temperature Storage Temperature Note: Absolute maximum ratings are those values beyond which the device ...

Page 5

UC3500 ELECTRICAL CHARACTERISTICS(Cont.) UC3500-2. 1.7V) IN PARAMETER Output Voltage Start-up Voltage ( (Note Hold-on Voltage Supply Current Internal Switch R DS(ON) Internal Leakage Current Maximum Oscillator Frequency Oscillator Duty Cycle Efficiency UC3500-3. ...

Page 6

UC3500 ELECTRICAL CHARACTERISTICS(Cont.) UC3500-3.6V (V =2.2V) IN PARAMETER Output Voltage Start-up Voltage ( (Note Hold-on Voltage Supply Current Internal Switch R DS(ON) Internal Leakage Current Maximum Oscillator Frequency Oscillator Duty Cycle Efficiency UC3500-4.0V (V =2.4V) IN ...

Page 7

UC3500 PRINCIPLE OF OPERATION The UTC UC3500 consists of a Band-Gap reference voltage source, error amplifier, VFM control logic core, oscillator, V limiter amplifier, N-channel MOSFET switching transistor and output voltage divider network. LX The device compares the Band-Gap reference ...

Page 8

UC3500 TYPICAL APPLICATION CIRCUIT RECONMMENDED COMPONENTS ：47μH (Sunida CD54 Fosc＝500kHz) L ：MA737, or MBRM110L D ：10V 4.7μF (Tantalum ：16V 47μF (Tantalum) C OUT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw CMOS QW-R502-072.D ...

Page 9

UC3500 TYPICAL CHARACTERISTICS UC3500-2.5V Output Waveform - 100 125 Time(µs) Output Waveform of LX Under Maximum Frenquency ...

Page 10

UC3500 TYPICAL CHARACTERISTICS(Cont.) UC3500-2.7V Output Waveform - 100 125 Time(µs) Output Waveform of LX Under Maximum Frenquency ...

Page 11

UC3500 TYPICAL CHARACTERISTICS(Cont.) UC3500-3.3V Output Waveform - 100 125 Time(µs) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com. ...

Page 12

UC3500 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 all UTC ...

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