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TPS25944 Datasheet Preview

TPS25944 Datasheet

eFuse Power MUX

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TPS25942A, TPS25942L, TPS25944A, TPS25944L
SLVSCE9D – JUNE 2014 – REVISED OCTOBER 2017
TPS25942x/44x 2.7 V-18 V, 5-A eFuse Power MUX With Multiple Protection Modes
1 Features
1 2.7 V to 18 V Operating Voltage, 20 V (Maximum)
• 42-mΩ RON (Typical)
• 0.6 A to 5.3 A Adjustable Current Limit (±8%)
• IMON Current Indicator Output (±8%)
• 200-µA Operating IQ (Typical)
• 15-µA Disabled IQ (Typical)
• ±2% Overvoltage, Undervoltage Thresholds
• Reverse Current Blocking
• 1-µs Reverse Voltage Shutoff
• Programmable dVo/dt Control
• Power Good and Fault Outputs
• Two Overcurrent Fault Response Options
– TPS25942: I(LIMIT) with Thermal Shutdown
– TPS25944: 4 ms Fault Timer then Shutoff
• –40°C to +125°C Junction Temperature Range
• UL 2367 Recognized
– File No. 169910
– RILIM 20 kΩ (4.81 A Maximum)
• UL60950 Safe during Single Point Failure
– Open-Short ILIM detection
2 Applications
• Power Path Management
• Redundant Power Supply Systems
• PCIe cards, NICs and RAID Systems
• USB Power Banks, Power MUXes
• SSDs and HDDs
• Tablets and Notebooks
• Adapter Power Devices
• PLCs, SS Relays and Fan Control
3 Description
The TPS25942, TPS25944 eFuse Power MUX is a
compact, feature rich power management device with
a full suite of protection functions. The wide operating
range allows control of many popular DC bus
voltages. Integrated back-to-back FETs provide
bidirectional current control making the device well
suited for power muxing and systems with multiple
power sources.
Load, source and device protection are provided with
many programmable features. Thresholds for
undervoltage, overvoltage, overcurrent, dVo/dt ramp
rate, power good, and in-rush current protection are
all programmable to suit specific system
requirements. For system status monitoring and
downstream load control, the device provides
PGOOD, FLT and precise current monitor output.
The TPS25942, TPS25944 monitor V(IN) and V(OUT) to
provide true reverse blocking from output when V(IN) <
(V(OUT) – 10 mV). The device can be configured to
assign Main/Auxiliary supply priority using the FLT
and DMODE pins.
Device Information(1)
PART NUMBER(2)
PACKAGE
BODY SIZE (NOM)
TPS25942L
TPS25942A
TPS25944L
WQFN (20)
3.00 mm x 4.00 mm
TPS25944A
(1) For all available packages, see the orderable addendum at
the end of the datasheet
(2) TPS2594xL = Latched, TPS2594xA = Auto Retry
2.7 to 18 V
V(IN)
Simplified Schematic
IN
RTOTAL =
EN/UVLO 42 m:
OVP
OUT
FLT
PGOOD
To Load
Failover of V(MAIN) = 12 V to V(AUX) = 12.3 V
Using Diode Mode Control
DMODE
PGTH
dVdT
IMON
GND TPS25942x ILIM
TPS25944x
COUT = 150 mF, RL = 4 W
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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.




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TPS25944 Datasheet Preview

TPS25944 Datasheet

eFuse Power MUX

No Preview Available !

TPS25942A, TPS25942L, TPS25944A, TPS25944L
SLVSCE9D – JUNE 2014 – REVISED OCTOBER 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 4
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 6
7.1 Absolute Maximum Ratings ...................................... 6
7.2 ESD Ratings.............................................................. 6
7.3 Recommended Operating Conditions....................... 6
7.4 Thermal Information .................................................. 6
7.5 Electrical Characteristics........................................... 7
7.6 Timing Requirements ................................................ 9
7.7 Typical Characteristics ............................................ 10
8 Parameter Measurement Information ................ 18
9 Detailed Description ............................................ 19
9.1 Overview ................................................................. 19
9.2 Functional Block Diagram ....................................... 20
9.3 Feature Description................................................. 22
9.4 Device Functional Modes........................................ 26
10 Application and Implementation........................ 29
10.1 Application Information.......................................... 29
10.2 Typical Application ................................................ 29
10.3 System Examples ................................................ 37
11 Power Supply Recommendations ..................... 44
11.1 Transient Protection .............................................. 44
11.2 Output Short-Circuit Measurements ..................... 45
12 Layout................................................................... 46
12.1 Layout Guidelines ................................................. 46
12.2 Layout Example .................................................... 47
13 Device and Documentation Support ................. 48
13.1 Device Support...................................................... 48
13.2 Documentation Support ........................................ 48
13.3 Related Links ........................................................ 48
13.4 Receiving Notification of Documentation Updates 48
13.5 Community Resources.......................................... 48
13.6 Trademarks ........................................................... 48
13.7 Electrostatic Discharge Caution ............................ 48
13.8 Glossary ................................................................ 49
14 Mechanical, Packaging, and Orderable
Information ........................................................... 49
4 Revision History
Changes from Revision C (January 2017) to Revision D
Page
• Added section 9.3.5 Reverse Current Protection to Feature Description ............................................................................ 25
Changes from Revision B (October 2017) to Revision C
Page
• Changed internal ramp rate of 12 V/ms for output to 30 V/ms in the Hot Plug-In and In-Rush Current Control section..... 23
Changes from Revision A (March 2015) to Revision B
Page
• Changed Figure 49: Added Logic Inversion ......................................................................................................................... 21
Changes from Original (June 2014) to Revision A
Page
• Changed Features From: UL2367 Recognition Pending To: UL 2367 Recognized, RILIM 20 kΩ (4.81 A max), File
No. 169910 ............................................................................................................................................................................. 1
• Changed text in the Description From: FLT and ENBLK pins To: FLT and DMODE pins..................................................... 1
• Deleted Note "Product Preview" from the Device Information table ...................................................................................... 1
• Changed Pin 1 From ENBLK To: DMODE throughout the data sheet .................................................................................. 4
• Changed ENBLK To: DMODE in the Pin Functions table and updated the DESCRIPTION ................................................ 4
• Moved the Storage Temperature From the Handling Ratings table To Absolute Maximum Ratings table .......................... 6
• Changed the Handling Ratings table To: ESD Ratings table ................................................................................................ 6
• Changed DIODE MODE INPUT (ENBLK): ACTIVE LOW To: DIODE MODE INPUT (DMODE): ACTIVE HIGH in the
Electrical Characteristics ........................................................................................................................................................ 7
• Added Test Condition to I(LIM): "R(ILIM) = 20 kΩ" in the Electrical Characteristics .................................................................. 8
• Changed Test Condition in I(LIM) From: "ENBLK = High; Diode Mode" To: "DMODE = High; Non-ideal Diode Mode"
in the Electrical Characteristics ............................................................................................................................................. 8
2
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Copyright © 2014–2017, Texas Instruments Incorporated
Product Folder Links: TPS25942A TPS25942L TPS25944A TPS25944L


Part Number TPS25944
Description eFuse Power MUX
Maker etcTI
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