TPS2100_08 Datasheet, PDF (1/20 Pages) Texas Instruments – POWER-DISTRIBUTION SWITCHES

TPS2100, TPS2101
V_AUX 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;
16-µA Max Supply Current
D IN2 . . . 1.3-Ω, 10-mA P-Channel;
1.5-µA Max Supply Current (V_AUX 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 CDM,
200-V Machine-Model Electrostatic-
Discharge Protection
SLVS197D – JUNE 1999 – REVISED JUNE 2000
typical applications
D Notebook and Desktop PCs
D Palmtops and PDAs
TPS2100
IN1
3.3 V VCC
IN2
3.3 V VAUX
3.3 V
D3 or PME Status
Control Signal
EN
Hold-Up
Capacitor
Controller
(CardBus,
1394,
PCI,
et al.)
Figure 1. Typical Dual-Input Single-Output
Application
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.
PCI Bus
VAUX 3.3 V
VGA
TPS210x
DBV PACKAGE
(TOP VIEW)
TPS2100
EN
GND
IN2
15
2
34
IN1
OUT
IN2
GND
EN
NC
D PACKAGE
(TOP VIEW)
1
8
2
7
3
6
4
5
OUT
OUT
NC
IN1
VCC _D3-STAT
PCI12xx / PCI14xx
CardBus Controller
Figure 2. V_AUX CardBus Implementation
DBV PACKAGE
(TOP VIEW)
TPS2101
EN
GND
IN2
15
2
34
IN1
OUT
NC – No internal connection
IN2
GND
EN
NC
D PACKAGE
(TOP VIEW)
1
8
2
7
3
6
4
5
OUT
OUT
NC
IN1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
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