SC4626ASKTRT Semtech, SC4626ASKTRT Datasheet

SC4626ASKTRT

Manufacturer Part Number

SC4626ASKTRT

Description

2.5MHz, 1.0A Synchronous Step Down Regulator In SOT23-5

Manufacturer

Semtech

Datasheet

1.SC4626ASKTRT.pdf (22 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

SC4626ASKTRT

Manufacturer:

SEMTECH/美国升特

Quantity:

20 000

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POWER MANAGEMENT

Features



Applications



Typical Application Circuit

August 27, 2010

Up to 1A Output Current

2.5MHz Switching Frequency

Efficiency Up to 93%

Low Output Noise Across Load Range

Excellent Transient Response

Start Up into Pre-Bias Output

100% Duty-Cycle Low Dropout Operation

<1µA Shutdown Current

Internal Soft Start

Input Under-Voltage Lockout

Output Over-Voltage, Current Limit Protection

Over-Temperature Protection

Adjustable Output Voltage

SOT23-5 Package

Fully WEEE and RoHS Compliant

Bluetooth Radios

DSC and PMPs

GPS Devices

xDSL Systems

POL Regulators

Portable HDD

Wireless LAN

OUT

Range: 2.9 – 5.5V

Options: 1.0 - 3.3V

2.9V to 5.5V

Enable

10µF

SC4626C

GND

VIN

VOUT

Description

The SC4626 is a high efficiency, synchronous step-down

regulator providing up to 1A output current in a SOT23-

5 package. The device requires only three external filter

components for a complete step-down regulator solution.

The input voltage range is 2.9 to 5.5V with either factory

programmed outputs from 1.0 to 3.3V or adjustable

output via an external resistor divider.

The converter operates at fixed 2.5MHz switching

frequency allowing small L/C filtering components.

The voltage mode architecture is compatible with chip

inductors and capacitors for minimum PCB footprint and

lowest overall system cost.

Up to 93% efficiency is achieved with low R

switches. PWM constant frequency operation ensures

low output ripple across the load range. 100% duty-cycle

provides 300mV dropout voltage at 1A which extends

the minimum input voltage for 2.5V and 3.3V outputs.

Excellent transient response is achieved with no external

compensation components.

The SC4626 provides input under-voltage, output over-

voltage, output short circuit and over-temperature

protection to safeguard the device and system under fault

conditions. The regulator provides integrated soft-start to

minimize inrush currents. Standby quiescient current is

less than 1µA.

The SC4626 is available in a SOT23-5 package.

2.5MHz, 1A Synchronous Step

2.2µH

Down Regulator in SOT23-5

10µF

OUT

1.20V/1A

OUT

www.semtech.com

SC4626

DS(ON)

internal

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