TPS2100, TPS2101
POWER-DISTRIBUTION SWITCHES
V
AUX
SLVS197D – JUNE 1999 – REVISED JUNE 2000
features
typical applications
Dual-Input, Single-Output MOSFET Switch
With No Reverse Current Flow (No Parasitic
Diodes)
Notebook and Desktop PCs
Palmtops and PDAs
IN1 . . . 250-mΩ, 500-mA N-Channel;
16-µA Max Supply Current
TPS2100
IN1
IN2 . . . 1.3-Ω, 10-mA P-Channel;
Controller
(CardBus,
1394,
PCI,
et al.)
1.5-µA Max Supply Current (V
Mode)
AUX
3.3 V V
CC
3.3 V
Advanced Switch Control Logic
IN2
3.3 V V
AUX
CMOS- and TTL-Compatible Enable Input
Controlled Rise, Fall, and Transition Times
2.7-V to 4 V Operating Range
EN
D3 or PME Status
Control Signal
Hold-Up
Capacitor
SOT-23-5 and SOIC-8 Package
–40°C to 70°C Ambient Temperature Range
Figure 1. Typical Dual-Input Single-Output
Application
2-kV Human-Body-Model, 750-V CDM,
200-V Machine-Model Electrostatic-
Discharge Protection
description
The TPS2100 and TPS2101 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
0.75 µA to decrease the demand on the standby power supply. The MOSFETs in the TPS2100 and TPS2101
do not have the parasitic diodes, found in discrete MOSFETs, which allow the devices to prevent back-flow
current when the switch is off.
TPS2100
D PACKAGE
(TOP VIEW)
(TOP VIEW)
DBV PACKAGE
PCI Bus
V
3.3 V
AUX
IN2
GND
EN
OUT
OUT
NC
1
2
3
4
8
7
6
5
IN1
1
2
3
5
4
EN
GND
IN2
OUT
NC
IN1
VGA
TPS210x
D3-STAT
TPS2101
V
CC
D PACKAGE
(TOP VIEW)
DBV PACKAGE
(TOP VIEW)
PCI12xx / PCI14xx
CardBus Controller
IN2
GND
EN
OUT
OUT
NC
1
2
3
4
8
7
6
5
EN
GND
IN2
IN1
1
2
3
5
4
Figure 2. V
CardBus Implementation
AUX
OUT
NC
IN1
NC – No internal connection
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
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