TPS25940A Datasheet, PDF (1/47 Pages) Texas Instruments – 18V eFuse with True Reverse Blocking and DevSleep Support for SSDs

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TPS25940A, TPS25940L
SLVSCF3A – JUNE 2014 – REVISED MARCH 2015
TPS25940x 2.7 – 18V eFuse with True Reverse Blocking and DevSleep Support for SSDs
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)
• 95 μA DevSleep Mode I_Q (Typical)
• 15 μA Disabled I_Q (Typical)
• ±2% Overvoltage, Undervoltage Threshold
• Reverse Current Blocking
• 1 μs Reverse Voltage Shutoff
• Programmable dV_o/dt Control
• Power Good and Fault Outputs
• -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 Test
– Open/Short ILIM detection
2 Applications
• PCIe/SATA/SAS HDD and SSD Drives
• Enterprise and Micro Servers
• Smart Load Switch
• Set-Top-Box (STB), DTVs and Game Consoles
• RAID Cards - Holdup Power Management
• Telecom Switches and Routers
• Adapter Powered Devices
3 Description
The TPS25940 eFuse Power Switch is a compact,
feature rich power management device with a full
suite of protection functions, including a low power
DevSleep™ mode that supports compliance with the
SATA™ Device Sleep standard. 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 systems with load side holdup energy that
must not drain back to a failed supply bus.
Load, source and device protection are provided with
many programmable features including overcurrent,
dV_o/dt ramp and overvoltage, undervoltage
thresholds. For system status monitoring and
downstream load control, the device provides
PGOOD, FLT and precise current monitor output.
Precise programmable undervoltage, overvoltage
thresholds and the low I_Q DevSleep mode simplify
SSD power management design.
The TPS25940 monitors V_(IN) and V_(OUT) to provide
true reverse current blocking when V_(IN) < (V_(OUT) - 10
mV). This function supports swift changeover to a
boosted voltage energy storage element in systems
where backup voltage is greater than bus voltage.
Device Information⁽¹⁾
PART NUMBER⁽²⁾
PACKAGE
BODY SIZE (NOM)
TPS25940A
TPS25940L
WQFN (20)
3.00 mm x 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
(2) TPS25940L = Latched, TPS25940A = Auto Retry
4 Simplified Schematic
2.7 to 18 V
V_(IN)
IN
RTOTAL =
EN/UVLO 42 m:
OUT
FLT
OVP
PGOOD
DEVSLP
PGTH
dVdT
IMON
GND
ILIM
TPS25940x
To Load
Power Fail Detection and Blocking
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.