TI TPS51285ARUKT

Понижающий (Buck) синхронный (2), линейный (LDO) (2)4Контроллер5 В ~ 24 В

Overview

The TPS51285ARUKT and TPS51285B are cost-effective, dual synchronous buck controllers with 5-V and 3.3-V LDOs, targeted for notebook system-power supply solutions. The device achieves low power consumption by the use of auto-skip and ULQ? modes, which is beneficial for long battery life in system stand-by mode. The 256-kHz VCLK output is provided to drive an external charge pump, generating gate drive voltage for the load switches with minimum power consumption in the main converter. The device employs adaptive on-time D-CAP? mode control which enables fast load transient response without external compensation network. The TPS51285A/B operates with supply input voltage ranging from 5V to 24V and supports output voltages of 5 V and 3.3 V. The TPS51285ARUKT and TPS51285B are available in a 20-pin 3 x 3 (mm) QFN package and is specified from –40°C to 85°C.

The TPS51285A and TPS51285B are cost-effective, dual synchronous buck controllers with 5-V and 3.3-V LDOs, targeted for notebook system-power supply solutions. The device achieves low power consumption by the use of auto-skip and ULQ? modes, which is beneficial for long battery life in system stand-by mode. The 256-kHz VCLK output is provided to drive an external charge pump, generating gate drive voltage for the load switches with minimum power consumption in the main converter. The device employs adaptive on-time D-CAP? mode control which enables fast load transient response without external compensation network. The TPS51285A/B operates with supply input voltage ranging from 5V to 24V and supports output voltages of 5 V and 3.3 V. The TPS51285A and TPS51285B are available in a 20-pin 3 x 3 (mm) QFN package and is specified from –40°C to 85°C.

Features

Input Voltage Range: 5 V to 24 V

Output Voltages: 5 V and 3.3 V (Adjustable Range +10%)

Built-in, 100-mA, 5-V, and 3.3-V LDOs

Clock Output for Charge-Pump

+1% Reference Accuracy

Adaptive On-Time D-CAPTM Mode Control Architecture with 400 kHz (CH1) and 475 kHz(CH2) Frequency

Auto-skip and ULQTM modes for long battery life in system standby mode

Internal 0.8-ms Voltage Servo Soft Start

Low-Side Rps(on) Current Sensing Scheme

Built-In Output Discharge Function

Separate Enable Input for Switchers

Dedicated OC Setting Terminals

Power Good Indicator

OVP, UVP, and OCP Protection

Non-L _atch UVLO and OTP Protection

20-Pin, 3 mm x 3 mm, QFN (RUK)

Applications

Notebook Computers

Tablet Computers

Communications equipment 

Wireless infrastructure 

Industrial 

Factory automation & control 

Personal electronics 

PC & notebooks