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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC187 датащи(PDF) 1 Page - Semtech Corporation |
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SC187 датащи(HTML) 1 Page - Semtech Corporation |
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1 / 17 page  POWER MANAGEMENT 4A, 2.2MHz Synchronous Step-Down Regulator with 15 Preset Output Voltages SC187 Features Input Voltage Range — 2.9 to 5.5V Output Voltage Range — 0.8V to 3.3V Output Current — up to 4A Ultra-Small Footprint — <1mm Height Solution Minimum 1.8MHz Switching Frequency with no AM Radio Band Interference Efficiency Up to 95% Low Output Noise Across Load Range Excellent Transient Response Start Up into Pre-Bias Output Duty-Cycle Low Dropout Operation — 100% Shutdown Current — <1µA Externally Programmable Soft Start Time Power Good indicator Input Under-Voltage Lockout Output Over-Voltage, Current Limit Protection Over-Temperature Protection Thermally Enhanced 3 x 3 x 0.6 (mm) MLPQ-UT16 package Temperature Range — -40 to +85°C Lead-free, Halogen free, and RoHS/WEEE compliant Applications Automotive Power Supplies Routers and Network Cards LCD TV Office Automation Description The SC187 is a 4A synchronous step-down regulator designed to operate with an input voltage range of 2.9V to 5.5V. The device 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 device is also capable of adjusting output voltage via an external resistor divider. The SC187 operates in PWM mode with fixed 2.2MHz oscillator frequency, allowing the use of small surface mount external components. Connecting the control pins 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 accord- ing to Table 1. Other features include under-voltage lockout, programmable soft-start to limit in-rush current, power good indicator, over-temperature protection, and output short circuit protection. The SC187 is available in a thermally-enhanced, 3 x 3 x 0.6 (mm) MLPQ-UT16 package. Typical Application Circuit CTL0 CTL1 PGND AVIN CIN 22µF VIN COUT 47µF LX VOUT SC187 RAVIN 1Ω PVIN CTL2 AGND CTL3 CTL0 CTL1 CTL2 CTL3 L 1.0µH VOUT RPGOOD 100kΩ PGOOD CSS 10nF SS CAVIN 10nF Rev 2.0 1 |
Аналогичный номер детали - SC187 |
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Аналогичное описание - SC187 |
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