Texas Instruments TPS51120 Highly Sophisticated Dual Current Mode Synchronous Step-down Controller
Description:
The TPS51120 is a highly sophisticated dual current mode synchronous step-down controller. It is a full featured controller designed to run directly off a three- or four-cell Li-ion battery and provide high-power and 5-V and/or 3.3-V standby regulation for all the downstream circuitry in a notebook computer system. High current, 100-mA, 5-V or 3.3-V on-board linear regulators have glitch-free switch over function to SMPS and can be kept alive independently during standby state. The pseudo-constant frequency adaptive on-time control scheme supports full range of current mode operation including simplified loop compensation, ceramic output capacitors as well as seamless transition to reduced frequency operation at light-load condition.
Features:
- 3.3-V and 5-V 100-mA Bootstrapped Standby Regulators with Independent Enables
- Selectable D-CAP Mode Enables Fast Transient Response Less than 100 ns
- Selectable Low Ripple Current Mode
- Less than 1% Internal Reference Accuracy
- Selectable PWM-only/Auto-skip Modes
- Low-side RDS(on) Loss-less Current Sensing
- RSENSE Accurate Current Sense Option
- Internal Soft-start and Integrated VOUT Discharge Transistors
- Integrated 2-V Reference
- Adaptive Gate Drivers with Integrated Boost Diode
- Power Good for Each Channel with Delay Timer
- Fault Disable Mode
- Supply Input Voltage Range: 4.5 V to 28 V
Package included:
- 1 x Texas Instruments TPS51120 Highly Sophisticated Dual Current Mode Synchronous Step-down Controller
