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TPS2557-Q1 Datasheet Preview

TPS2557-Q1 Datasheet

Precision Adjustable Current-Limited Power-Distribution Switches

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www.ti.com
TPS2556-Q1, TPS2557-Q1
SLVSC97B – MARCH 20T14PSR2E5V5I6S-EQD1S,ETPPTESM2B5E5R72-Q0210
SLVSC97B – MARCH 2014 – REVISED SEPTEMBER 2020
TPS255x-Q1 Precision Automotive Adjustable Current-Limited Power-Distribution
Switches
1 Features
• AEC-Q100 Qualified
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C5
Functional Safety-Capable
– Documentation available to aid functional safety
system design
• 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
• Safety-related certifications:
– UL Recognized for UL 2367
– CB Certification for IEC 60950
– CB Certification for IEC 62368
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(1)
TPS2556QDRB
S-PVSON (8)
TPS2557QDRB
S-PVSON (8)
BODY SIZE
3 mm × 3 mm
3 mm × 3 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
DC to DC
Converter
or Controller
(LM25117-Q1,
TPS54340-Q1,
TPS54240-Q1,
TPS40170-Q1)
5 V OUT
0.1 μF
100 kΩ
Control Signal
COUT
IN
OUT
IN
OUT
TPS2556-Q1
TPS2557-Q1
FAULT
ILIM
RILIM
EN
GND
Thermal Pad
VIN
DM1
DP1
TPS2513A-Q1
DM2
GND
DP2
USB
Connector
VBUS
D–
D+
GND
CUSB
Recommend TPS2561A-Q1
for the Dual Port Solution
Typical Application as Power Switch of Single-Port Automotive USB Charge Port
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
Copyrighint t©el2le0c2t0uTael xparsoIpnesrtrtuymmeanttsteIrnscoarnpdoraottehder important disclaimers. PRODUCTION DATA.
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etcTI

TPS2557-Q1 Datasheet Preview

TPS2557-Q1 Datasheet

Precision Adjustable Current-Limited Power-Distribution Switches

No Preview Available !

TPS2556-Q1, TPS2557-Q1
SLVSC97B – MARCH 2014 – REVISED SEPTEMBER 2020
www.ti.com
Table of Contents
1 Features............................................................................1
2 Application....................................................................... 1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Device Comparison Table...............................................3
6 Terminal Configuration and Functions..........................3
7 Specifications.................................................................. 3
7.1 Absolute Maximum Ratings........................................ 3
7.2 Handling Ratings.........................................................4
7.3 Recommended Operating Conditions.........................4
7.4 Thermal Information....................................................4
7.5 Electrical Characteristics.............................................5
7.6 Switching Characteristics............................................5
7.7 Typical Characteristics................................................ 6
8 Parameter Measurement Information............................ 7
9 Detailed Description........................................................8
9.1 Overview..................................................................... 8
9.2 Functional Block Diagram........................................... 9
9.3 Feature Description.....................................................9
9.4 Device Functional Modes..........................................10
10 Applications and Implementation.............................. 12
10.1 Application Information........................................... 12
10.2 Typical Application, Design for Current Limit.......... 12
11 Power Supply Recommendations..............................17
12 Layout...........................................................................18
12.1 Layout Guidelines................................................... 18
12.2 Layout Example...................................................... 18
13 Device and Documentation Support..........................19
13.1 Related Links.......................................................... 19
13.2 Trademarks............................................................. 19
13.3 Electrostatic Discharge Caution..............................19
13.4 Glossary..................................................................19
14 Mechanical, Packaging, and Orderable
Information.................................................................... 20
4 Revision History
Changes from Revision A (March 2014) to Revision B (September 2020)
Page
• Added functional safety link and safety-related certifications bullet to the Features section ............................. 1
• Updated the numbering format for tables, figures and cross-references throughout the document...................1
Changes from Revision * (March 2014) to Revision A (March 2014)
Page
• Changed part number in Description from TPS2511-Q to TPS2511-Q1............................................................ 1
• Changed CURRENT LIMIT values in Electrical Characteristics table ............................................................... 5
• Changed Equation 1 ........................................................................................................................................ 12
• Revised Figure 10-2 graph............................................................................................................................... 12
• Changed Equation 2 ........................................................................................................................................ 13
• Changed resistor value from 33.2 kΩ to 33.6 kΩ .............................................................................................13
• Changed Equation 3 ........................................................................................................................................ 13
• Changed Equation 4 ........................................................................................................................................ 14
• Changed current-limit threshold from 4 316 mA to 4 406 mA ..........................................................................14
• Changed values in Table 10-2 ......................................................................................................................... 14
2
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Copyright © 2020 Texas Instruments Incorporated


Part Number TPS2557-Q1
Description Precision Adjustable Current-Limited Power-Distribution Switches
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