Datasheet > S-8551AA-M5T1G

S-8551AA-M5T1G

更新时间： 2024-09-15 04:03:15

品牌	Logo	应用领域
精工 - SII		稳压器开关光电二极管
页数	文件大小	规格书
26页	426K
描述
STEP-DOWN, BUILT-IN FET, SYNCHRONOUS RECIFICATION, PWM CONTROL SWITCHING REGULATORS

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数据手册

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S-8551AA-M5T1G 数据手册

Rev.2.1_01

STEP-DOWN, BUILT-IN FET, SYNCHRONOUS

S-8550/8551 Series

RECTIFICATION, PWM CONTROL SWITCHING REGULATORS

The S-8550/8551 Series is a CMOS synchronous rectification step-down

switching regulator which mainly consists of a reference voltage circuit, an

oscillator, an error amplifier, a phase compensation circuit, a PWM controller, an

under voltage lockout circuit (UVLO), a current limit circuit, and a power MOS

FET. The oscillation frequency is high at 1.2 MHz, so a high efficiency, large

output current, step-down switching regulator can be achieved by using small

external parts.

The built-in synchronous rectification circuit makes achieving high efficiency

easier compared with conventional step-down switching regulators. A ceramic

capacitor can be used as an output capacitor. High-density mounting is

supported by adopting a small SOT-23-5 package.

The S-8550 and S-8551 Series are offered according to different pin configuration.

Features

• Oscillation frequency :

1.2 MHz

• Input voltage range :

• Output voltage range :

• Output current :

2.0 to 5.5 V

Arbitrarily settable by external output voltage setting resistor

600 mA

• Reference voltage :

• Efficiency :

• Soft-start function :

• Shutdown function :

• Built-in current limit circuit

0.6 V 2.0%

92%

1 ms typ.

Shutdown current consumption : 1.0 µA max.

• Pch power MOS FET on-resistance :

• Nch power MOS FET on-resistance :

0.4 Ω typ.

0.3 Ω typ.

• Constant continuous mode operation (no light load mode)

• Small package :

• Lead-free products

SOT-23-5

Applications

•

Mobile devices, such as mobile phones, Bluetooth devices, wireless devices, digital audio players, digital still

cameras, portable DVD players, and portable CD players

Package

Drawing Code

Tape

Package Name

SOT-23-5

Package

MP005-A

Reel

MP005-A

Seiko Instruments Inc.

12 3 4 5 6 7...26

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