TPS2553-Q1 Datasheet, PDF (1/32 Pages) Texas Instruments – Precision Adjustable Current-Limited Power-Distribution Switches

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TPS2553-Q1
SLVSBD0A – NOVEMBER 2012 – REVISED MARCH 2016
TPS2553-Q1 Precision Adjustable Current-Limited Power-Distribution Switches
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
• Up to 1.5-A Maximum Load Current
• ±6% Current-Limit Accuracy at 1.7 A (Typical)
• Meets Universal Serial Bus (USB) Current-
Limiting Requirements
• Backwards Compatible With TPS2550/51 and
TPS2551-Q1
• Adjustable Current-Limit, 75 mA–1300 mA
(Typical)
• Constant-Current Version
• Fast Overcurrent Response - 2-μs (Typical)
• 85-mΩ High-Side MOSFET
• Reverse Input-Output Voltage Protection
• Operating Range: 2.5 V to 6.5 V
• Built-in Soft-Start
• 15 kV ESD Protection per IEC 61000-4-2 (With
External Capacitance)
• See the TI Switch Portfolio
2 Applications
• Automotive ECU Supply Rail Power Distribution
and Switching
• Automotive ECU Supply Rail Precision Current
Limiting
• Power Distribution and Switching
• Precision Current Limiting
• USB Ports and Hubs
3 Description
The TPS2553-Q1 power-distribution switch is
intended for applications where precision current
limiting is required or heavy capacitive loads and
short circuits are encountered. It provides up to 1.5 A
of continuous load current. This device offers a
programmable current-limit threshold between 75 mA
and 1.7 A (typical) via an external resistor. Current-
limit accuracy as tight as ±6% can be achieved at the
higher current-limit settings. The power-switch rise
and fall times are controlled to minimize current
surges during turn on and off.
The TPS2553-Q1 device limits the output current to a
safe level by using a constant-current mode when the
output load exceeds the current-limit threshold. An
internal reverse-voltage comparator disables the
power switch when the output voltage is driven higher
than the input to protect devices on the input side of
the switch. The FAULT output asserts low during
overcurrent and reverse-voltage conditions.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS2553-Q1
SOT-23 (6)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application as USB Power Switch
5V USB
Input
R_FAULT
100 kW
TPS2553-Q1
0.1 mF
IN
OUT
Fault Signal
Control Signal
FAULT
EN
ILIM
GND
USB Data
USB
Port
120 mF
R_ILIM
20 kW ^{USB requirement only*}
*USB requirement that downstream
facing ports are bypassed with at least
120 mF per hub
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.