TPS2104DBVR Datasheet, PDF (1/19 Pages) Texas Instruments – VAUX POWER-DISTRIBUTION SWITCHES

TPS2104, TPS2105
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;
18-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 5.5 V Operating Range
D SOT-23-5 and SOIC-8 Package
D – 40°C to 85°C Ambient Temperature Range
D 2-kV Human Body Model, 750-V Charged
Device Model, 200-V Machine-Model
ESD Protection
SLVS235A – SEPTEMBER 1999 – REVISED APRIL 2000
typical applications
D Notebook and Desktop PCs
D Cell phone, Palmtops, and PDAs
D Battery Management
TPS2104
IN1
5 V VCC
5V
IN2
5 V VAUX
Control Signal
EN
Holdup
Capacitor
LOAD
Figure 1. Typical Dual-Input Single-Output
Application
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
0.75 µA 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.
DBV PACKAGE
(TOP VIEW)
TPS2104
D PACKAGE
(TOP VIEW)
EN 1 5 ^IN1
IN2
1
GND 2
GND
2
IN2 3 ⁴ OUT
EN
3
NC
4
8
OUT
7
OUT
6
NC
5
IN1
DBV PACKAGE
(TOP VIEW)
TPS2105
D PACKAGE
(TOP VIEW)
EN 1 5 IN1
IN2
1
GND 2
GND
2
IN2 ^{3 4} OUT
EN
3
NC
4
NC – No internal connection
8
OUT
7
OUT
6
NC
5
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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