TPS2041B, TPS2042B
TPS2043B, TPS2044B, TPS2051B
TPS2052B, TPS2053B, TPS2054B
DGN−8
DRB−8
DBV−5
D−16
D−8
www.ti.com .................................................................................................................................................. SLVS514J–APRIL 2004–REVISED DECEMBER 2008
CURRENT-LIMITED, POWER-DISTRIBUTION SWITCHES
1
FEATURES
APPLICATIONS
•
Heavy Capacitive Loads
2
•
70-mΩ High-Side MOSFET
•
Short-Circuit Protections
•
•
•
500-mA Continuous Current
Thermal and Short-Circuit Protection
TPS2041B/TPS2051B
TPS2041B/TPS2051B
TPS2042B/TPS2052B
D AND DGN PACKAGES
(TOP VIEW)
D AND DGN PACKAGES
(TOP VIEW)
DBV PACKAGE
(TOP VIEW)
Accurate Current Limit
(0.75 A min, 1.25 A max)
OUT
GND
OC
GND
IN
1
2
3
4
8
7
6
5
OUT
OUT
OUT
OC
GND
IN
1
2
3
4
8
7
6
5
OC1
IN
OUT1
OUT2
OC2
†
IN
†
EN1
•
•
•
•
•
•
Operating Range: 2.7 V to 5.5 V
0.6-ms Typical Rise Time
†
†
EN
EN2
EN
TPS2043B/TPS2053B
D PACKAGE
(TOP VIEW)
TPS2044B/TPS2054B
D PACKAGE
(TOP VIEW)
Undervoltage Lockout
TPS2042B/TPS2052B
DRB PACKAGES
(TOP VIEW)
Deglitched Fault Report (OC)
No OC Glitch During Power Up
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND
IN1
OC1
OUT1
OUT2
OC2
OC3
OUT3
NC
GND
IN1
OC1
OUT1
OUT2
OC2
1
8
7
6
5
OC1
GND
IN
†
†
EN1
EN1
2
3
OUT1
OUT2
OC2
†
†
EN2
GND
EN2
GND
Maximum Standby Supply Current:
1-µA (Single, Dual) or 2-µA (Triple, Quad)
†
OC3
EN1
†
4
IN2
†
IN2
†
OUT3
OUT4
OC4
EN2
EN3
EN3
•
•
•
Ambient Temperature Range: -40°C to 85°C
UL Recognized, File Number E169910
NC
†
NC
EN4
†All enable inputs are active high for the TPS205xB series.
NC − No connect
Additional UL Recognition for TPS2042B and
TPS2052B for Ganged Configuration
DESCRIPTION
The TPS204xB/TPS205xB power-distribution switches are intended for applications where heavy capacitive
loads and short circuits are likely to be encountered. These devices incorporates 70-mΩ N-channel MOSFET
power switches for power-distribution systems that require multiple power switches in a single package. Each
switch is controlled by a logic enable input. Gate drive is provided by an internal charge pump designed to
control the power-switch rise times and fall times to minimize current surges during switching. The charge pump
requires no external components and allows operation from supplies as low as 2.7 V.
When the output load exceeds the current-limit threshold or a short is present, the device limits the output current
to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When
continuous heavy overloads and short-circuits increase the power dissipation in the switch, causing the junction
temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal
shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures that the switch remains
off until valid input voltage is present. This power-distribution switch is designed to set current limit at 1 A
typically.
1
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.
2
PowerPAD is a trademark of Texas Instruments.
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information 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 © 2004–2008, Texas Instruments Incorporated
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