TPS2105D

VAUX配电开关 VAUX POWER-DISTRIBUTION SWITCHES

description

The TPS2104 and TPS2105 are dual-input, single-output power switches designed to provide uninterrupted output voltage when transitioning between two independent power supplies. Both devices combine one n-channel 250 mΩ and one p-channel 1.3 Ω MOSFET with a single output. The p-channel MOSFET IN2 is used with auxiliary power supplies that deliver lower current for standby modes. The n-channel MOSFET IN1 is used with a main power supply that delivers higher current required for normal operation. Low on-resistance makes the n-channel the ideal path for higher main supply current when power-supply regulation and system voltage drops are critical. When using the p-channel MOSFET, quiescent current is reduced to 0.75µA to decrease the demand on the standby power supply. The MOSFETs in the TPS2104 and TPS2105 do not have the parasitic diodes, typically found in discrete MOSFETs, thereby preventing back-flow current when the switch is off.

features

Dual-Input, Single-Output MOSFET Switch With No Reverse Current Flow No Parasitic Diodes

IN1 . . . 250-mΩ, 500-mA N-Channel; 18-µA Supply Current

IN2 . . . 1.3-Ω, 100-mA P-Channel; 0.75-µA Supply Current VAUXMode

Advanced Switch Control Logic

CMOS and TTL Compatible Enable Input

Controlled Rise, Fall, and Transition Times

2.7 V to 5.5 V Operating Range

SOT-23-5 and SOIC-8 Package

–40°C to 85°C Ambient Temperature Range

2-kV Human Body Model, 750-V Charged Device Model, 200-V Machine-Model ESD Protection