TPS24700 Datasheet, PDF (1/29 Pages) Texas Instruments – 2.5-V to 18-V High-Efficiency Hot-Swap Controller

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TPS24700
TPS24701
SLVSAL3B – MARCH 2011 – REVISED MAY 2011
2.5-V to 18-V High-Efficiency Hot-Swap Controller
Check for Samples: TPS24700, TPS24701
FEATURES
1
• 2.5-V to 18-V Operation
• Accurate Current Limiting for Starup
• Accurate 25-mV Current Sense Threshold
• Timed Overcurrent Breaker
• Power-Good Output
• Fast Breaker for Short-Circuit Protection
• Latch Off (TPS24700) and Retry Versions
(TPS24701)
• Programmable UV Threshold
• Drop-In Upgrade for LTC4211 – No Layout
Changes
• Small MSOP-8 Package
APPLICATIONS
• Server Backplanes
• Storage Area Networks (SAN)
• Medical Systems
• Plug-In Modules
• Base Stations
• Consumer Electronics
DESCRIPTION
The TPS24700/1 is an easy-to-use, 2.5 V to 18 V, hot-swap controller that drives an external N-channel
MOSFET. The programmable current limit and fault time protect the supply and load from excessive current at
startup. After startup, currents above the user-selected limit are allowed to flow until programmed timeout –
except in extreme overload events when load is immediately disconnected from source. The low, 25-mV current
sense threshold is highly accurate and allows use of smaller, more-efficient sense resistors, yielding lower power
loss and smaller footprint. A power-good output is provided for status monitoring and downstream load control.
TPS24700/1 replaces the LTC4211 in existing designs with no PCB board changes and only minor external
component changes – yielding a more accurate, efficient solution.
Text for Spacing
TYPICAL APPLICATION OF TPS24700/1 (12 V AT 10 A)
Text for Spacing
PINOUT
R_SENSE
M₁
V_IN
2 mΩ
CSD16403Q5
C₁
0.1 μF
R_GATE
10 Ω
R₁
130 kΩ
R₂
18.7 kΩ
VCC
EN
TIMER
SENSE
GATE
TPS2470x
GND
OUT
PGb
3V
R₄
3.01 kΩ
V_OUT
C_OUT
470 μF
C_T
56 nF
V_UVLO = 10.8 V
I_LMT = 12 A
t_FAULT = 7.56 ms
PGb
EN
TIMER
GND
DGK Package
(Top View)
1
8
2
7
3
6
4
5
VCC
SENSE
GATE
OUT
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated