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TPS2105DBV Datasheet

  • TPS2105DBV

  • VAUX POWER-DISTRIBUTION SWITCHES

  • 16頁(yè)

  • TI

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TPS2104, TPS2105
V
AUX
POWER-DISTRIBUTION SWITCHES
SLVS235A 鈥?SEPTEMBER 1999 鈥?REVISED APRIL 2000
features
typical applications
D
D
D
D
D
D
D
D
D
D
Dual-Input, Single-Output MOSFET Switch
With No Reverse Current Flow (No Parasitic
Diodes)
IN1 . . . 250-m鈩? 500-mA N-Channel;
18-碌A(chǔ) Supply Current
IN2 . . . 1.3-鈩? 100-mA P-Channel;
0.75-碌A(chǔ) Supply Current (V
AUX
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
鈥?40擄C to 85擄C Ambient Temperature Range
2-kV Human Body Model, 750-V Charged
Device Model, 200-V Machine-Model
ESD Protection
D
D
D
Notebook and Desktop PCs
Cell phone, Palmtops, and PDAs
Battery Management
TPS2104
5 V VCC
5 V VAUX
Control Signal
IN1
5V
IN2
EN
LOAD
Holdup
Capacitor
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 m鈩? and one p-channel (1.3
鈩?
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
碌A(chǔ)
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.
TPS2104
DBV PACKAGE
(TOP VIEW)
D PACKAGE
(TOP VIEW)
EN
GND
IN2
1
2
3
5
4
IN1
OUT
IN2
GND
EN
NC
1
2
3
4
8
7
6
5
OUT
OUT
NC
IN1
TPS2105
DBV PACKAGE
(TOP VIEW)
D PACKAGE
(TOP VIEW)
EN
GND
IN2
1
2
3
5
4
IN1
OUT
IN2
GND
EN
NC
1
2
3
4
8
7
6
5
OUT
OUT
NC
IN1
NC 鈥?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
漏
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.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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