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

TPS51120是TI德州仪器公司的一款控制器（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，本站介绍了TPS51120的封装应用图解、特点和优点、功能等，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 - 德州仪器

产品特性

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

产品应用

Notebook Computers System Bus and I/O

产品说明

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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS51120	VQFN (32)	5.00 mm × 5.00 mm

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