TPS2102, TPS2103 VAUX POWER-DISTRIBUTION SWITCHES
features
D Dual-Input, Single-Output MOSFET Switch
With No Reverse Cu...
TPS2102, TPS2103 VAUX POWER-DISTRIBUTION SWITCHES
features
D Dual-Input, Single-Output
MOSFET Switch
With No Reverse Current Flow (No Parasitic
Diodes)
D IN1 . . . 250-mΩ, 500-mA N-Channel;
14-µA Supply Current
D IN2 . . . 1.3-Ω, 100-mA P-Channel;
0.75-µA Supply Current (VAUX Mode)
D Advanced Switch Control Logic D
CMOS and TTL Compatible Enable Input D Controlled Rise, Fall, and Transition Times D 2.7 V to 4 V Operating Range D SOT-23-5 and SOIC-8 Package D – 40°C to 70°C Ambient Temperature Range D 2-kV Human Body Model, 750-V Charged
Device Model, 200-V Machine-Model
ESD Protection
SLVS234A – SEPTEMBER 1999 – REVISED APRIL 2000
typical applications
D Notebook and Desktop PCs D Cell phone, Palmtops, and PDAs D Battery Management
TPS2102 IN1 3.3 V VCC IN2 3.3 V VAUX
3.3 V
D3 or PME Status Control Signal
EN Holdup
Capacitor
Controller (CardBus,
1394, PCI, et al.)
Figure 1. Typical Dual-Input Single-Output Application
description
The TPS2102 and TPS2103 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 th...