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V(IN)
V(OUT)
FLTb
I_IN
10 V/div
5 V/div
10 V/div
1 A/div
TIME = 20 s/divm
90mO
IN
OUT
ENUV
SS
GND
TPS25921x
ILIM
OVP
4.5 to 18 V
V
(IN)
FLT
Load
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TPS25921A
,
TPS25921L
SLVSCE1C –AUGUST 2014–REVISED NOVEMBER 2015
TPS25921x 4.5V - 18V eFuse with Precise Current Limit and Over Voltage Protection
1 Features 3 Description
The TPS25921 is a compact, feature rich eFuse with
1
• 4.5 V – 18 V Operating Voltage, 20 V (Max)
a full suite of protection functions. The wide operating
• 90 mΩ R
DS(ON)
(Typical)
voltage allows control of many popular DC buses.
• 0.4 A to 1.6 A Adjustable Current Limit
The precise ±2% current limit, at room temperature,
provides excellent accuracy making the TPS25921
• ±2% Accurate I
LIMIT
at 1A at 25°C
well suited for many system protection applications.
• ±3% Overvoltage, Undervoltage Threshold
Load, source and device protection are provided with
• Programmable dV
O
/dt Control
multiple programmable features including overcurrent,
• Fault Output for Thermal Shutdown, UVLO and
overvoltage and undervoltage. 3% threshold accuracy
OVP
for UV and OV, ensures tight supervision of bus
• -40°C to 125°C Junction Temperature Range
voltages, eliminating the need for supervisor circuitry.
Fault flag output (FLT) is provided for system status
• Auto-Retry and Latch-Off Versions
monitoring and down stream load control.
• UL2367 Recognized - File No. E169910
For hot-plug-in boards, TPS25921 provides in-rush
• UL60950 - Safe during Single Point Failure Test
current control and programmable output ramp-rate.
Output ramp rate is programmable using a capacitor
2 Applications
at soft-start (SS) pin, for maximum design flexibility.
• White Goods, Appliances
Device Information
(1)
• Set Top Boxes, DVD and Gaming Consoles
PART NUMBER PACKAGE BODY SIZE (NOM)
• HDD and SSD drives
TPS25921A
• Smart Meters, Gas Analyzers
SOIC 4.90mm x 3.91mm
TPS25921L
• Smart Load Switch
(1) For all available packages, see the orderable addendum at
• USB Switch
the end of the datasheet.
• Adapter Power Devices
4 Application Schematic
12V Short Circuit Response
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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