ISL62871
ISL62871 is PWM DC/DC Controller manufactured by Renesas.
features
. Robust integrated MOSFET drivers and Schottky bootstrap diode reduce the implementation area and lower ponent cost.
Intersil’s R3 Technology™ bines the best features of both fixed-frequency and hysteretic PWM control. The PWM frequency is 300k Hz during static operation, being variable during changes in load, setpoint voltage, and input voltage when changing between battery and AC-adapter power. The modulators ability to change the PWM switching frequency during these events in conjunction with external loop pensation produces superior transient response. For maximum efficiency, the converter automatically enters diode-emulation mode (DEM) during light-load conditions such as system standby.
Features
- Input Voltage Range: 3.3V to 25V
- Output Voltage Range: 0.5V to 3.3V
- Output Load up to 30A
- Extremely Flexible Output Voltage Programmability
- 2-Bit VID (ISL62872) Selects Four Independent Setpoint Voltages
- 1-Bit VID (ISL62871) Selects Two Independent Setpoint Voltages
- Simple Resistor Programming of Setpoint Voltages
- Accepts External Setpoint Reference Such as DAC
- ±0.75% System Accuracy: -10°C to +100°C
- One Capacitor Programs Soft-start and Setpoint Slew-rate
- Fixed 300k Hz PWM Frequency in Continuous Conduction
- External pensation Affords Optimum Control Loop Tuning
- Automatic Diode Emulation Mode for Highest Efficiency
- Integrated High-current MOSFET Drivers and Schottky Boot-Strap Diode for Optimal Efficiency
- Choice of Overcurrent Detection Schemes
- Lossless Inductor DCR Current Sensing
- Precision Resistive Current Sensing
- Power-Good Monitor for Soft-Start and Fault Detection
- Fault Protection
- Undervoltage
- Overvoltage
- Overcurrent (DCR-Sense or Resistive-Sense Capability)
- Over-Temperature Protection
- Fault Identification by PGOOD Pull-Down Resistance
- Pb-Free (Ro HS pliant)
Applications
- Mobile PC Graphical Processing Unit VCC rail
- Mobile PC I/O...
