SC283 SEMTECH [Semtech Corporation], SC283 Datasheet

SC283

Manufacturer Part Number

SC283

Description

Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator

Manufacturer

SEMTECH [Semtech Corporation]

Datasheet

1.SC283.pdf (20 pages)

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

SC283AWLTRT

Manufacturer:

SEMTECH/美国升特

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

SC283WLTRT

Manufacturer:

SEMTECH/美国升特

Quantity:

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Company:

Amily Shenzhen XNWY Technology Co., Ltd

Part Number:

SC283WLTRT

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POWER MANAGEMENT

Features



Applications



Typical Application Circuit

July 20, 2010

Up to 1.8A Output Current for Each Channel

Ultra-Small Footprint, <1mm Height Solution

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

2mm x 3mm x 0.8mm thermally enhanced

MLPQ-W18 package

-40 to +85°C Temperature Range

Pb-Free product. RoHS/WEEE and Halogen Free com-

pliant

Desktop Computing

Set-Top Box

LCD TV

Network Cards

Printer

OUT

Range: 2.9 – 5.5V

Selectable: 0.8 - 3.3V

Synchronous Step-Down Regulator

Description

The SC283 is a dual channel 1.8A synchronous step-

down regulator designed to operate with an input

voltage range of 2.9 to 5.5 Volts. Each channel offers

fifteen pre-determined output voltages via four control

pins programmable from 0.8 to 3.3 Volts. The control pins

allow for on-the-fly voltage changes, enabling system

designers to implement dynamic power savings. The

SC283 is also capable of adjusting the output voltage via

an external resistor divider.

The device operates with a fixed 2.5MHz oscillator

frequency, allowing the use of small surface mount

external components.

Connecting CTL0 — CTL3 to logic low forces the device

into shutdown mode reducing the supply current to less

than 1µA. Connecting any of the control pins to logic

high enables the converter and sets the output voltage

according to Table 1. Other features include under-

voltage lockout, soft-start to limit inrush current, and

over-temperature protection.

The SC283 is available in a thermally-enhanced, 2mm

x 3mm x 0.8mm MLPQ-W18 package and has a rated

temperature range of -40 to +85°C.

Dual Channel 2.5MHz, 1.8A

www.semtech.com

SC283

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