(China (Mainland))
Product Summary
The mb3871pfv-g-bnd-er is a pulse width modulation (PWM) DC/DC converter IC chip that provides a selection of 1.3 V to 2.0 V output voltages for Mobile Pentium II CPUs, using a 4-bit input signal information. The mb3871pfv-g-bnd-er utilizes synchronous rectification for high efficiency and features a soft-start/discharge control function for ease in designing power supplies in multi-supply systems, making the mb3871pfv-g-bnd-er ideal for Mobile Pentium II power supply systems.
Parametrics
mb3871pfv-g-bnd-er absolute maximum ratings: (1)Power supply voltage VCC: 20 V; (2)Bias voltage VB: 20 V; (3)Boot voltage VCB: 32 V; (4)Control input voltage VCTL: 20 V; (5)PWRGOOD output voltage VPWRGD: 17 V; (6)Output current IO: 120 mA; (7)Peak output current IO Duty ￡ 5% (t = 1/fOSC × Duty): 800 mA; (8)Allowable dissipation PD Ta ≤ +25°C: 740 mW; (9)Storage temperature Tstg: –55 to +125 °C.
Features
mb3871pfv-g-bnd-er features: (1)Highly efficient for using synchronous rectification scheme; (2)On-chip soft-start/discharge control circuit; (3)High precision output voltage: ±1.2%; (4)4-bit, 16-step DAC: 2.0 V to 1.3 V in 50 mV steps; (5)Frequency range: 100 kHz to 500 kHz using variable resistance (on-chip frequency setting capacitance); (6)Standby current: 0 mA TYP; (7)On-chip PWRGOOD circuit for output voltage state detection; (8)Timer-latch short-circuit protection circuit, and overvoltage protection circuit for output protection.
Diagrams
