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TPS25940x
IN
OUT
EN/UVLO
OVP
DEVSLP
dVdT
GND
FLT
PGOOD
PGTH
IMON
ILIM
To Load
2.7 to 18 V
R
TOTAL
=
42 m:
V
(IN)
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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 3 Description
The TPS25940 eFuse Power Switch is a compact,
1
• 2.7 V – 18 V Operating Voltage, 20 V (Max)
feature rich power management device with a full
• 42 mΩ R
ON
(Typical)
suite of protection functions, including a low power
• 0.6 A to 5.3 A Adjustable Current Limit (±8%)
DevSleep™ mode that supports compliance with the
SATA™ Device Sleep standard. The wide operating
• IMON Current Indicator Output (±8%)
range allows control of many popular DC bus
• 200 μA Operating I
Q
(Typical)
voltages. Integrated back to back FETs provide
• 95 μA DevSleep Mode I
Q
(Typical)
bidirectional current control making the device well
suited for systems with load side holdup energy that
• 15 μA Disabled I
Q
(Typical)
must not drain back to a failed supply bus.
• ±2% Overvoltage, Undervoltage Threshold
Load, source and device protection are provided with
• Reverse Current Blocking
many programmable features including overcurrent,
• 1 μs Reverse Voltage Shutoff
dV
o
/dt ramp and overvoltage, undervoltage
• Programmable dV
o
/dt Control
thresholds. For system status monitoring and
• Power Good and Fault Outputs
downstream load control, the device provides
PGOOD, FLT and precise current monitor output.
• -40°C to 125°C Junction Temperature Range
Precise programmable undervoltage, overvoltage
• UL 2367 Recognized
thresholds and the low I
Q
DevSleep mode simplify
– File No. 169910
SSD power management design.
– R
ILIM
≥ 20 kΩ (4.81 A max)
The TPS25940 monitors V
(IN)
and V
(OUT)
to provide
• UL60950 - Safe during Single Point Failure Test
true reverse current blocking when V
(IN)
< (V
(OUT)
- 10
mV). This function supports swift changeover to a
– Open/Short ILIM detection
boosted voltage energy storage element in systems
where backup voltage is greater than bus voltage.
2 Applications
• PCIe/SATA/SAS HDD and SSD Drives
Device Information
(1)
PART NUMBER
(2)
PACKAGE BODY SIZE (NOM)
• Enterprise and Micro Servers
TPS25940A
• Smart Load Switch
WQFN (20) 3.00 mm x 4.00 mm
TPS25940L
• Set-Top-Box (STB), DTVs and Game Consoles
(1) For all available packages, see the orderable addendum at
• RAID Cards - Holdup Power Management
the end of the datasheet.
• Telecom Switches and Routers
(2) TPS25940L = Latched, TPS25940A = Auto Retry
• Adapter Powered Devices
4 Simplified Schematic
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.
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