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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC196 датащи(PDF) 1 Page - Semtech Corporation |
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SC196 датащи(HTML) 1 Page - Semtech Corporation |
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1 / 18 page  February 8, 2007 The SC196 is a synchronous step-down converter with integrated power devices designed for use in applications using a single-cell Li-ion battery. Its wide input voltage range also makes it suitable for use in systems with fixed 3.3V or 5V supply rails available. The switching frequency is nominally set to 1MHz, allowing the use of small inductors and capacitors. The current rating of the internal MOSFET switches allows a DC output current of 1.5A. The output voltage is set by connecting a resistor divider from the filter inductor to the feedback pin. See the SC196A for pin-programmable output voltages. The SC196 has a flexible clocking methodology that allows it to be synchronized to an external oscillator or controlled by the internal oscillator. The device operates in either forced PWM mode or in PSAVE mode. If PSAVE mode is enabled, the part will automatically enter PFM at light loads to maintain maximum efficiency across the full load range. For noise sensitive applications, PSAVE mode can be disabled by synchronizing to an external oscillator or pulling the SYNC/PWM pin high. Shutdown turns off all the control circuitry to achieve a typical shutdown current of 0.1μA. Cell phones Wireless communication chipset power Personal media players Microprocessor/DSP core/IO power PDAs and handheld computers WLAN peripherals USB powered modems 1 Li-Ion or 3 NiMH/NiCd powered devices Up to 95% efficiency V OUT adjustable from less than 0.8V to VIN Output current — 1.5A Input range — 2.5V to 5.5V Quiescent current — 17μA Fixed 1MHz frequency or 750kHz to 1.25MHz synchronized operation PSAVE operation to maximize efficiency at light loads Shutdown current <1μA Fast transient response 100% duty cycle in dropout Soft-start Over-temperature and short-circuit protection Lead-free package — MLPD10-UT, 3 x 3 x 0.6 mm COUT 22μF L1 4.7μH VIN 2.5V to 5.5V VOUT <0.8V to VIN 1.5A CIN 10μF VIN EN SYNC/PWM PGND GND MODE ADJ SC196 LX RFB1 RFB2 VOUT PVIN CFB1 10pF 1 www.semtech.com SC196 1.5A Synchronous Buck Converter with Integrated Power Devices POWER MANAGEMENT Features Applications Typical Application Circuit Description |
Аналогичный номер детали - SC196 |
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Аналогичное описание - SC196 |
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