Document
TPS2148 TPS2158
SLVS373 − AUGUST 2001
3.3ĆV LDO AND DUAL SWITCH FOR USB PERIPHERAL POWER MANAGEMENT
FEATURES
D Complete Power Management Solution for
USB Bus-Powered Peripherals
D 3.3-V 200 mA Low-Dropout Voltage Regulator
With Enable
D 3.3-V 340-mΩ (Typ) High-Side MOSFET D 5-V 340-mΩ (Typ) High-Side MOSFET D Independent Thermal- and Short-Circuit
Protection for LDO and Each Switch
D 2.9-V to 5.5-V Operating Range D CMOS- and TTL-Compatible Enable Inputs D 75-µA (Typ) Supply Current D Available in 8-Pin MSOP (PowerPAD) D −40°C to 85°C Ambient Temperature Range
APPLICATIONS
D USB Peripherals
− Digital Cameras − Zip Drives − Speakers and Headsets
DESCRIPTION
The TPS2148 incorporates two power distribution switches and an LDO in one small package, providing a USB peripheral power management solution that saves up to 60% in board space over typical implementations.
The TPS2148 meets USB 2.0 bus-powered peripheral requirements. An integrated LDO regulates the 5-V bus power down to 3.3 V for the USB controller, and a MOSFET switch that is internally connected to the output of the LDO simplifies meeting the suspend and enumeration current requirements imposed by the USB specification.
A second switch is available to support a downstream port, stage power to a second voltage regulator, or disable power to selected circuitry in power-save modes.
Each power-distribution switch is capable of supplying 200 mA of continuous current, and the independent logic enables are compatible with 5-V logic and 3-V logic. The switches and the LDO are designed with controlled rise times and fall times to minimize current surges.
The TPS2148 has active-low enables while the TPS2158 has active-high enables.
LDO and dual switch family selection guide and schematics
VIN/SW1
LDO_EN
EN1 SW2 EN2 GND
TPS2145/55 TSSOP−14
LDO
LDO_OUT VIN/SW1
LDO_ADJ
OC1 OUT1
OUT2 OC2
EN1
SW2 EN2 GND
TPS2147/57 MSOP−10
LDO
LDO_OUT VIN/SW1
OC1 OUT1
LDO_EN EN2
OUT2 OC2
EN1 GND
TPS2148/58 MSOP−8
LDO
LDO_OUT
OUT2 OUT1
TPS2149/59 MSOP−8
VIN
LDO
LDO_OUT
EN1
EN2 GND
OUT1 OC OUT2
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.
PowerPAD is a trademark of Texas Instruments.
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.
Copyright 2001, Texas Instruments Incorporated
www.ti.com
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TPS2148 TPS2158
SLVS373 − AUGUST 2001
AVAILABLE OPTIONS
PACKAGE
TA
DESCRIPTION
AND PIN
COUNT
Adjustable LDO with LDO enable
TSSOP-14
−40°C to 85°C
3.3-V fixed LDO
3.3-V Fixed LDO with LDO enable and LDO output switch
MSOP-10 MSOP-8
3.3-V Fixed LDO, shared input with switches
MSOP-8
NOTE: All options available taped and reeled. Add an R suffix (e.g. TPS2145IPWPR)
PACKAGED DEVICES
ACTIVE LOW (SWITCH)
ACTIVE HIGH (SWITCH)
TPS2145IPWP TPS2155IPWP
TPS2147IDGQ TPS2157IDGQ
TPS2148IDGN TPS2158IDGN
TPS2149IDGN TPS2159IDGN
TPS2148, TPS2158 MSOP (DGN) PACKAGE
(TOP VIEW)
OUT1 VIN/SWIN1 LDO_OUT
OUT2
1 2 3 4
8 EN1† 7 EN2† 6 LDO_EN 5 GND
† Pins 7 and 8 are active high for TPS2158.
absolute maximum ratings over operating free-air temperature (unless otherwise noted)†
Input voltage range: VI(VIN/SWIN1), VI(ENx), VI(LDO_EN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 6 V Output voltage range: VO(OUTx), VO(LDO_OUT), VO(OCx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 6 V Continuous output current, IO(OUT), IO(LDO_OUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating virtual-junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40°C to 110°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Electrostatic discharge (ESD) protection: Human body model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
Charged device model (CDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kV
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “r.