TPS25942A Datasheet, PDF (1/54 Pages) Texas Instruments – 5A eFuse Power MUX with Multiple Protection Modes

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TPS25942A, TPS25942L, TPS25944A, TPS25944L
SLVSCE9A – JUNE 2014 – REVISED MARCH 2015
TPS25942x/44x 2.7V-18V, 5A eFuse Power MUX with Multiple Protection Modes
1 Features
•1 2.7 V – 18 V Operating Voltage, 20 V (Max)
• 42 mΩ R_ON (Typical)
• 0.6 A to 5.3 A Adjustable Current Limit (±8%)
• IMON Current Indicator Output (±8%)
• 200 µA Operating I_Q (Typical)
• 15 µA Disabled I_Q (Typical)
• ±2% Overvoltage, Undervoltage Thresholds
• Reverse Current Blocking
• 1 µs Reverse Voltage Shutoff
• Programmable dV_o/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
– R_ILIM ≥ 20 kΩ (4.81 A max)
• 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, dV_o/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
4 Simplified Schematic
2.7 to 18 V
V(IN)
1
IN
RTOTAL =
EN/UVLO 42 m:
OUT
FLT
OVP
PGOOD
DMODE
PGTH
dVdT
IMON
GND TPS25942x ILIM
TPS25944x
To Load
Failover of V_(MAIN) = 12 V to V_(AUX) = 12.3 V
Using Diode Mode Control
C_OUT = 150 mF, R_L = 4 W
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.