TPS2105-EP Datasheet, PDF (1/24 Pages) Texas Instruments – TPS2105-EP VAUX Power-Distribution Switch

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TPS2105-EP V_AUX Power-Distribution Switch
TPS2105-EP
SLVSCH2 – JULY 2014
1 Features
2 Applications
•1 Dual-Input, Single-Output MOSFET Switch With
No Reverse Current Flow (No Parasitic Diodes)
• IN1: 250-mΩ, 500-mA N-Channel; 18-µA Supply
Current
• IN2: 1.3-mΩ, 100-mA P-Channel; 0.75-µA 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 Package
• 2-kV Human Body Model, 750-V Charged Device
Model, 200-V Machine-Model ESD Protection
• Supports Defense, Aerospace, and Medical
Applications
– Controlled Baseline
– One Assembly and Test Site
– One Fabrication Site
– Available in Military (–55°C to 125°C)
Temperature Range
– Extended Product Life Cycle
– Extended Product-Change Notification
– Product Traceability
• Notebook and Desktop PCs
• Cell phone, Palmtops, and PDAs
• Battery Management
3 Description
The TPS2105 is a dual-input, single-output power
switch 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 TPS2105 do not have the parasitic diodes,
typically found in discrete MOSFETs, thereby
preventing back-flow current when the switch is off.
Device Information⁽¹⁾
ORDER NUMBER
PACKAGE
BODY SIZE (NOM)
TPS2105MDBVREP SOT-23 (5)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
TPS2105
IN1
5 V V_CC
5V
IN2
5 V V_AUX
Control Signal
EN
Holdup
Capacitor
LOAD
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.