

TPS51120是TI公司的一款控制器(外部开关)产品,TPS51120是用于笔记本电源的具有 100mA 待机寄存器的双电流模式同步步降控制器,本页介绍了TPS51120的产品说明、应用、特性等,并给出了与TPS51120相关的TI元器件型号供参考。
TPS51120 - 用于笔记本电源的具有 100mA 待机寄存器的双电流模式同步步降控制器 - 控制器(外部开关) - DC/DC开关稳压器 - TI公司(Texas Instruments,德州仪器)
- 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
- Powergood for Each Channel with Delay Timer
- Fault Disable Mode
- Supply Input Voltage Range: 4.5 V to 28 V
Notebook Computers System Bus and I/O
The TPS51120 is a highly sophisticated dual, 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. Optional D-CAP mode operation optimized for SP-CAP or POSCAP output capacitors allows further reduction of external compensation parts. Dynamic UVP supports VIN line sag without latch off by hitting 5-V UVP. No negative voltage appears at output voltage node during UVLO, UVP, and OCP, OTP or loss of VIN.
The TPS51120 32-pin QFN package is specified from –40°C to 85°C ambient temperature.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS51120 | VQFN (32) | 5.00 mm × 5.00 mm |

