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TPS22942DCKRG4 Datasheet(PDF) 1 Page - Texas Instruments

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No. de Pieza. TPS22942DCKRG4
Descripción  LOW-INPUT-VOLTAGE CURRENT-LIMITED LOAD SWITCHES WITH SHUT OFF AND AUTO-RESTART FEATURE
Descarga  19 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS22942DCKRG4 Datasheet(HTML) 1 Page - Texas Instruments

 
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945
www.ti.com
SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009
LOW-INPUT-VOLTAGE CURRENT-LIMITED LOAD SWITCHES
WITH SHUT OFF AND AUTO-RESTART FEATURE
Check for Samples: TPS22941 TPS22942 TPS22943 TPS22944 TPS22945
1
FEATURES
DESCRIPTION
Input Voltage Range: 1.62 V to 5.5 V
Low ON resistance
The TPS2294x load switches provide protection to
systems and loads in high-current conditions. The
rON = 0.4 Ω at VIN = 5.5 V
devices contain a 400-m
Ω current-limited P-channel
rON = 0.5 Ω at VIN = 3.3 V
MOSFET that can operate over an input voltage
rON = 0.6 Ω at VIN = 2.5 V
range of 1.62 V to 5.5 V. Current is prevented from
flowing when the MOSFET is off. The switch is
rON = 0.8 Ω at VIN = 1.8 V
controlled by an on/off input (ON), which is capable of
Minimum Current Limit: 40 mA or 100 mA
interfacing directly with low-voltage control signals.
Undervoltage Lockout
The TPS2294x includes thermal shutdown protection
that
prevents
damage
to
the
device
when
a
Thermal Shutdown
continuous over-current condition causes excessive
Shutdown Current < 1
μA
heating by turning off the switch.
Fast Current Limit Response Time
When the switch current reaches the maximum limit,
Fault Blanking
the TPS22941/2/3/4/5 operates in a constant-current
Auto Restart
mode to prohibit excessive currents from causing
damage. TPS22941/3 has a current limit of 40 mA
1.8-V Compatible Control Input Thresholds
and TPS22942/4/5 has a current limit of 100 mA.
ESD Performance Tested Per JESD 22
For
the
TPS22941/2/5,
if
the
constant
current
4000-V Human-Body Model
condition still persists after 10ms, these parts shut off
(A114-B, Class II)
the switch and pull the fault signal pin (OC) low. The
1000-V Charged-Device Model (C101)
TPS22941/2/5, have an auto-restart feature that turns
Tiny SC-70 (DCK) Package
the switch on again after 80 ms if the ON pin is still
active. A current limit condition on the TPS22943 and
on the TPS22944 immediately pull the fault signal pin
APPLICATIONS
low
(OC
pin)
and
the
part
remains
in
the
Low-Current Sensor Protection
constant-current mode until the switch current falls
HDMI Connector Protection
below the current limit.
Notebooks
The TPS2294x is available in a SC70-5 (DCK)
PDAs
package. It is characterized for operation over the
GPS Devices
free-air temperature range of –40°C to 85°C.
MP3 Players
Peripheral Ports
Table 1. Feature List
MINIMUM CURRENT LIMIT
CURRENT LIMIT
DEVICE
AUTO-RESTART TIME (ms)
ON PIN ACTIVITY
(mA)
BLANKING TIME (ms)
TPS22941
40
10
80
Active LOW
TPS22942
100
10
80
Active LOW
TPS22943
40
0
N/A
Active HIGH
TPS22944
100
0
N/A
Active HIGH
TPS22945
100
10
80
Active HIGH
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.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008–2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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