TPS2556-Q1 Datasheet, PDF (1/28 Pages) Texas Instruments – Precision Automotive Adjustable Current-Limited Power-Distribution Switches

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TPS2556-Q1, TPS2557-Q1
SLVSC97A – MARCH 2014 – REVISED MARCH 2014
TPS255x-Q1 Precision Automotive Adjustable Current-Limited Power-Distribution
Switches
1 Features
•1 AEC-Q100 Qualified
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C5
• Meets USB Current-Limiting Requirements
• Adjustable Current Limit, 500 mA–5 A (Typ.)
• ±6.5% Current-Limit Accuracy at 4.5 A
• Fast Short-Circuit Response – 3.5-μs (Typ.)
• 22-mΩ High-Side MOSFET
• Operating Range: 2.5 V to 6.5 V
• 2-μA Maximum Standby Supply Current
• Built-In Soft-Start
• 15-kV and 8-kV System-Level ESD Capable
2 Application
Automotive USB Charging Ports
3 Description
The TPS2556-Q1 and TPS2557-Q1 power-
distribution switches are specialized for automotive
applications which require precision current limiting or
capacity to handle heavy capacitive loads and short
circuits. These devices offer a programmable current-
limit threshold between 500 mA and 5 A (typical) via
an external resistor. Control of the power-switch rise
and fall times minimizes current surges during turnon
or turnoff.
TPS2556-Q1 and TPS2557-Q1 devices limit the
output current to a safe level by switching into a
constant-current mode when the output load exceeds
the current-limit threshold. The FAULT logic output
asserts low during overcurrent and overtemperature
conditions.
Use with the TPS2511-Q1 or TPS2513A-Q1 for a
low-loss, automotive-qualified, USB charging-port
solution capable of charging all of today's popular
phones and tablets.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
TPS2556QDRB
S-PVSON (8)
3 mm × 3 mm
TPS2557QDRB
S-PVSON (8)
3 mm × 3 mm
space
space
space
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Typical Application as Power Switch of
Single-Port Automotive USB Charge Port
DC to DC
Converter
or Controller
(LM25117-Q1,
TPS54340-Q1,
TPS54240-Q1,
TPS40170-Q1)
5 V OUT
0.1 μF
100 kΩ
Control Signal
C_OUT
IN
OUT
IN
OUT
TPS2556-Q1
TPS2557-Q1
FAULT
ILIM
R_ILIM
EN
GND
Thermal Pad
VIN
DM1
DP1
TPS2513A-Q1
GND
DM2
DP2
USB
Connector
VBUS
D–
D+
GND
C_USB
Recommend TPS2561A-Q1
for the Dual Port Solution
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.