TPS27081A Datasheet, PDF (1/14 Pages) Texas Instruments – 1.2 - 8V, 3A PFET High Side Load Switch with Level Shift & Adjustable Slew Rate Control

TPS27081A
www.ti.com
SLVSBE9A – APRIL 2012 – REVISED JULY 2012
1.2 - 8V, 3A PFET High Side Load Switch with Level Shift & Adjustable Slew Rate Control
Check for Samples: TPS27081A
FEATURES
1
• Low ON Resistance, High current PFET
– R_DS(ON) = 32mΩ (Typ) at V_GS = –4.5V
– R_DS(ON) = 44mΩ (Typ) at V_GS =–3.0V
– R_DS(ON) = 85mΩ (Typ) at V_GS = –1.8V
– R_DS(ON) = 85mΩ (Typ) at V_GS = –1.5V
– R_DS(ON) = 155mΩ (Typ) at V_GS = –1.2V
• Adjustable Turn-ON and Turn-OFF slew rate
control through discrete components R1, R2,
and C1
• Supports a wide range of 1.2V up to 8V supply
inputs
• Integrated NMOS for Inrush current Control
• NMOS Enable Supports a Wide Range of 1.2V
up to 8V Control logic Interface
• Full Protection Against ESD (All Pins)
– HBM 2kV, CDM 500V
• Ultra Low Leakage Current in Stand-by (Typ
100nA)
• –40°C to 85°C Temperature Rating
• Available in Tiny 6-pin Packages
– 2.9mm x 1.6mm Thin (0.9mm max) SOT-23
(DDC)
– 2mm x 2mm SON-6 (DRV) Preview Only
APPLICATIONS
• High Side Load Switch
• Inrush-current control
• Power Sequencing and Control
• Stand-by Power Isolation
• Portable Power Switch
TPS27081ADDC
(TOP VIEW)
TPS27081ADRV PREVIEW ONLY
(TOP VIEW)
R2 1
VOUT 2
6 R1/C1
5 ON/OFF
R2 1
6 R1/C1
OUT 2
GND
(Thermal Pad)
5 ON/OFF
OUT 3
4 VIN
VOUT 3
4 VIN
2.9mm x 1.6mm x 0.75mm TSOT-23 (DDC)
2mm x 2mm SON-6 (DRV)
Figure 1. TPS27081A Packages
DESCRIPTION
The TPS27081A IC is a high side load switch that
integrates a Power PFET and a Control NMOS in a
tiny package.
The TPS27081A is fully protected against ESD
strikes on all pins. The TPS27081A features industry-
standard ESD protection on all pins thus providing
better ESD compatibility with other on-board
components.
The TPS27081A level shifts ON/OFF logic signal to
VIN levels and thus supports as low as 1.2V CPU or
MCU logic to control higher voltage power supplies
(VIN) without requiring an external level shifter.
Switching a large value output capacitor CL through a
fast ON/OFF logic signal may result in an excessive
inrush current. To control the load inrush current
connect a resistor R2, as shown in Figure 2 To
further limit the inrush current add an external
capacitor C1. To configure the TPS27081A to
achieve a specific slew rate refer to the Application
section.
A single external component, R1, is required in
applications that do not require inrush current control.
In such applications connect the TPS27081A pin R2
to system ground.
Up to
8V
Supply
GPIO/
Logic
VIN
(4)
ESD
R1
R1/C1
(6)
ESD
(5)
ESD
ON/OFF
Q1
Q2
(2, 3)
ESD
VOUT
CL
C1
LOAD
(1)
R2
R2
Figure 2. Simplified Block & Application Diagram
Component Table (Typical Application)
COMPONENT DESCRIPTION
R1
Level Shift Pull-up Resistor
R2
Optional ⁽¹⁾
C1
Optional ⁽¹⁾
(1) Required for load inrush current (slew rate) control
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2012, Texas Instruments Incorporated