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IC / 51117 / TPS51117 / QFN-14

تولید کننده: Texas Instruments
مدل کالا: TPS51117
موجودی:
تماس 8893- 6186
قیمت: 0تومان

51117 - TPS51117 Texas Instruments

Single Synchronous Step-Down Controller

کنترل کننده گام به پایین سنکرون

Features

High Efficiency, Low Power Consumption, 4.5-μA Typical Shutdown Current

Fixed Frequency Emulated On-Time Control Adjustable from 100 kHz to 550 kHz

D-CAP™ Mode With 100-ns Load Step Response

< 1% Initial Reference Accuracy

Output Voltage Range: 0.75 V to 5.5 V

Wide Input Voltage Range: 1.8 V to 28 V

Selectable Auto-Skip/PWM-Only Operation Temperature Compensated (4500 ppm/°C) Low-Side RDS(on) Overcurrent Sensing

Negative Overcurrent Limit

Integrated Boost Diode

Integrated OVP/UVP and Thermal Shutdown

Powergood Signal

Internal 1.2-ms Voltage Soft-Start

Integrated Output Discharge (Soft-Stop)

 

Applications

 Notebook Computers

 I/O Supplies

 System Power Supplies

 

Description

The 51117 - TPS51117 device is a cost-effective, synchronous buck controller for POL voltage regulation in notebook PC applications.

The controlleris dedicated for the operation of the Adaptive On- Adjustable from 100 kHz to 550 kHz Time D-CAP mode.

This mode provides ease-of-use,low external component count, and fast transient response.

Auto-skip mode for high efficiency down to the milliampere load range, or PWM-only mode for low-noise operation is selectable.

The current-sensing scheme for positive overcurrent and negative overcurrent protection is loss-less low-side RDS(on) sensing plus temperature compensation.

The device receives a 5-V (4.5 V to5.5 V) supply from another regulator such as the TPS51120 or TPS51020. The conversion input can be either VBAT or a 5-V rail, ranging from 1.8 V to 28 V, and the output voltage range is from 0.75 V to 5.5 V.

The 51117 - TPS51117 is available in a 14-pin VQFN or a 14-pin TSSOP package and is specified from –40°C to 85°C .

 

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