UCC2919PW Datasheet, PDF (1/27 Pages) Texas Instruments – 3-V TO 8-V HOT SWAP POWER MANAGER

UCC2919
UCC3919
SLUS374C − JULY 1999 − REVISED NOVEMBER 2005
3ĆV TO 8ĆV HOT SWAP POWER MANAGER
FEATURES
D Precision Fault Threshold
D Charge Pump for Low R_DS(on) High Side
Drive
D Differential Sense Inputs
D Programmable Average Power Limiting
D Programmable Linear Current Control
D Programmable Fault Time
D Fault Output Indicator
D Manual and Automatic Reset Modes
D Shutdown Control With Programmable
Softstart
D Undervoltage Lockout
D Electronic Circuit Breaker Function
TYPICAL APPLICATION DIAGRAM
RS
DESCRIPTION
The UCC3919 family of hot swap power
managers provide complete power management,
hot swap, and fault handling capability. The
UCC3919 features a duty ratio current limiting
technique, which provides peak load capability
while limiting the average power dissipation of the
external pass transistor during fault conditions.
The UCC3919 has two reset modes, selected with
the TTL/CMOS compatible L/R pin. In one mode,
when a fault occurs the IC repeatedly tries to reset
itself at a user defined rate, with user defined
maximum output current and pass transistor
power dissipation. In the other mode the output
latches off and stays off until either the L/R pin is
reset or the shutdown pin is toggled. The on board
charge pump circuit provides the necessary gate
voltage for an external N-channel power FET.
FROM
SUPPLY
3 V TO 8 V
CSP
IMAX
IBIAS
VDD
CSN
GATE
LINEAR
CURRENT AMP
+
TIMER
TO LOAD
CT
CAP
GND
UDG−01068
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright  2001 − 2005, Texas Instruments Incorporated
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