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TPS2105D-TPS2105DBVR-TPS2105DBVRG4-TPS2105DBVT
2.7-5.5V Dual In/Single Out MOSFET, 0.5A Main/0.1A Aux Input, Act-High Enable, Industrial Temp.
IN1... 250-mW , 500-mA N-Channel;18-m A Supply Current IN2... 1.3-W , 100-mA P-Channel;
0.75-m A Supply Current (VAUX Mode)
Advanced Switch Control Logic CMOS and TTL Compatible Enable Input Controlled Rise, Fall, and Transition Times 2.7 V to 5.5 V Operating Range SOT-23-5 and SOIC-8 Package –40°C to 85°C Ambient Temperature Range 2-kV Human Body Model, 750-V Charged
Device Model, 200-V Machine-Model
ESD Protection


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 mW ) and one p-channel (1.3 W ) 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
0.75m A 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)

GND
IN2
IN1
OUT
GND
IN2
IN1
OUT
DBV PACKAGE
(TOP VIEW)
TPS2104
TPS2105

NC – No internal connection
IN2
GND
OUT
OUT
IN1
D PACKAGE
(TOP VIEW)
D PACKAGE
(TOP VIEW)

IN2
GND
OUT
OUT
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.
Figure 1. Typical Dual-Input Single-Output
Application
TPS2104
IN1
IN2
5 V VCC
5 V VAUX
Control Signal
Capacitor
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