TPS2102 Datasheet, PDF (1/17 Pages) Texas Instruments – VAUX POWER-DISTRIBUTION SWITCHES

TPS2102, TPS2103
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;
14-µA Supply Current
D IN2 . . . 1.3-Ω, 100-mA P-Channel;
0.75-µA 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 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 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 TPS2102 and TPS2103
do not have the parasitic diodes, typically found in discrete MOSFETs, thereby preventing back-flow current
when the switch is off.
PCI Bus
VAUX 3.3 V
VGA
TPS210x
DBV PACKAGE
(TOP VIEW)
TPS2102
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)
TPS2103
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
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.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 2000, Texas Instruments Incorporated
1