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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC221 датащи(PDF) 1 Page - Semtech Corporation |
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SC221 датащи(HTML) 1 Page - Semtech Corporation |
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1 / 14 page  POWER MANAGEMENT 1 SC221 x 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator Features Patented X-EMITM Inductor Technology Enables Trace Inductors in PC Board Material Excellent EMI Performance Efficiency up to 90% 17.5µA 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 MLPD-UT 8 Lead Packages Lead-free, Halogen-free, and RoHS/WEEE Compliant Applications HDTV, Set Top Boxes, Gaming Consoles POL Applications White Goods Description The SC221 is a 20MHz X-EMI™(1)-enabled step-down regu- lator 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 tech- nology meets or exceeds the EMI performance of chip inductors and eliminates the need for discrete inductors. The SC221 uses a unique constant frequency, self-oscil- lating 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 17.5µA. At moderate to heavy loads, this part operates in PWM mode with a constant switching frequency of 20MHz. This high switching fre- quency 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 SC221 is available in MLPD-UT 8 Lead package. Note 1: Purchase of SC221 includes royalty-free right to use X-EMITM inductor technology with no addi- tional cost. Typical Application Circuit Revision 2.0 SC221 AGND SW VOUT VIN L, 220nH COUT 1 µF EN Enable FB AVIN PVIN CIN 1 µF R1 R2 PGND VOUT=1.8V up to 650mA 2.7~5.5V © 2016 Semtech Corporation |
Аналогичный номер детали - SC221 |
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Аналогичное описание - SC221 |
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