Datasheet > UC3550_11

UC3550_11

更新时间： 2024-11-11 12:20:43

品牌	Logo	应用领域
友顺 - UTC		控制器
页数	文件大小	规格书
9页	391K
描述
PWM CONTROLLEDï¼ PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER DESCRIPTION

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UC3550_11 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC3550

CMOS IC

PWM CONTROLLED， PWM/PFM

SWITCHABLE STEP-UP DC-DC

CONTROLLER

DESCRIPTION

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

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.

SOT-25

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

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.

The UTC UC3550 series goes automatically into skip switching

cycles under light load condition to maintain high efficiency.

FEATURES

* Input Voltage Range：0.9~8V

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

Accuracy ± 2.5%

* High Efficiency 88% (Typ.)

* Low Start-up Voltage of 0.9V Typical at I_OUT= 1.0mA

* Oscillator Frequency: 300kHz.(±20%)

* Chip Enable Pin with Pull-up Current Source

* High Output Current up to 1000mA (V_IN= 2.0V, V_OUT=3.3V)

ORDERING INFORMATION

Ordering Number

Package

SOT-25

Packing

Tape Reel

Lead Free

Halogen Free

UC3550L-xx-AF5-R

UC3550G-xx-AF5-R

www.unisonic.com.tw

1 of 9

QW-R502-082,C

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