SC220_V01中文資料SEMTECH數據手冊PDF規(guī)格書

Features

Patented X-EMITM Inductor Technology

Enables Trace Inductors in PC Board Material

Excellent EMI Performance

Efficiency up to 90

19μA Quiescent Current under Very Light Loads

Wide Input Voltage Range — 2.7V to 5.5V

Adjustable Output Voltage Down to 1.0V

Output DC Current — up to 650mA

High Light-load Efficiency via Automatic PSAVE Mode

Ultra-fast Transient Response — <1μs

Temperature Range — -40 to +85°C

Shutdown Current — 0.1μA (typical)

Requires Tiny 220nH Inductor

Requires Only 1μF of Output Capacitance

External Switching Frequency Synchronization

Protection Features Including

Over-Current Protection

Output Short-Circuit Protection

Thermal Shutdown Protection

Offered in SOIC 8 Lead Package

Lead-free, halogen-free, and RoHS/WEEE Compliant

AEC-Q100 Qualified Version Available

Applications

HDTV, Set Top Boxes, Gaming Consoles

POL Applications

White Goods

Automotive AEC-Q100 Qualified Applications

Description

The SC220/Q is a 20MHz X-EMI?(1)-enabled step-down

regulator optimized for power low voltage rails from 2.7

to 5.5V input voltage. X-EMI? inductor technology

enables inductors to be drawn directly on the PC board.

This technology meets or exceeds the EMI performance

of chip inductors and eliminates the need for discrete

inductors.

The SC220/Q uses a unique constant frequency, selfoscillating

control loop architecture to provide excellent

transient performance. Under light loads, the device

operates in Power Save mode(PSAVE) maintaining a

typical quiescent current of 19μA. At moderate to heavy

loads, this part operates in PWM mode with a constant

switching frequency of 20MHz. This high switching frequency

offers the advantages of using small and low cost

external components like a 1μF external capacitor and a

small 220nH inductor (including X-EMITM PCB trace

inductors).

The device provides adjustable output voltages down to

1.0V and an output current up to 650mA. An EN pin can

be used to synchronize to an external source and includes

de-glitching to reduce noise sensitivity.

The SC220/Q is available in SOIC 8 lead package.

The SC220Q is an AEC-Q100 qualified version.