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SC196AMLTRT Datasheet(PDF) 1 Page - Semtech Corporation |
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SC196AMLTRT Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 17 page  1 www.semtech.com SC196A 1.5A Synchronous Buck Converter with Integrated Power Devices POWER MANAGEMENT July 14, 2008 Typical Application Circuit Applications The SC196A is a synchronous step-down converter with integrated power devices. The SC196A is designed for single-cell Li-Ion battery applications but can also be used in fixed 3.3V or 5V applications. The switching frequency is nominally set to 1MHz, allowing the use of small inductors and capacitors. The maximum current rating of the internal MOSFET switches allows a DC output current of 1.5A. Four programable output voltages 1.00V/1.05V/1.20V/ 1.80V are available. See SC196 with external feedback for other output voltage settings. The SC196A has a flexible clocking methodology that allows it to be synchronized to an external oscillator or controlled by the internal oscillator. The device can operate 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 player Notebook and sub-notebook computers PDAs and mobile communicators WLAN peripherals Up to 93% efficiency 1.00V/1.05V/1.20V/1.80V selectable output voltage Output current — 1.5A Quiescent current — 17μA Input range — 2.7V to 5.5V Dynamic voltage positioning capability Fixed 1MHz frequency or 750kHz to 1.25MHz synchronized operation PSAVE operation to maximize efficiency at light loads Minimal external components Fast transient response 100% duty cycle in dropout Soft-start Over-temperature and short-circuit protection Space-saving lead-free package — MLP-10, 3 x 3mm Description Features SC196A VIN LX EN SYNC/PWM VOUT VID0 VID1 PGND MODE GND CIN L1 COUT 10μF 10μF 4.7μH VIN 2.7V to 5.5V VOUT 1.05V 1.5A |
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