Datasheet


     

SLUS384B – NOVEMBER 1999 – REVISED JUNE 2000
2
www.ti.com
functional block diagram
9
8
5 4 13 12 10 6
7
3
2
1
INTERNAL
BIAS
THERMAL
SHUTDOWN
ON TIME
CONTROL
3% DUTY
CYCLE
CHARGE
PUMP
16
15
14
VIN
VIN
VIN
VOUT
VOUT
VOUT
SHTDWN
FAULTCT
HEAT SINK GND
PINS
GND
IFAULT
IMAX
CURRENT
FAULT LEVEL
OVERLOAD
COMPARATOR
OVERCURRENT
COMPARATOR
REVERSE
COMPARATOR
V
OUT
+
20mV
CURRENT SENSE
1.5V
H = OPEN
MAXIMUM
CURRENT
LEVEL
+
+
+
+
+
+
UDG–99153
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
†}
Input Voltage 8 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOIC Power dissipation 2.5 W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault output sink current 50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault output voltage VIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Current (dc) Internally Limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage SHTDWN
, IFAULT, IMAX –0.3 V to VIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range T
stg
–65_C to 150_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating virtual junction temperature T
J
–55_C to 150_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature (soldering, 10 seconds) 300_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
‡
Unless otherwise indicated, voltages are reference to ground and currents are positive into, negative out of the specified terminal. Pulsed is
defined as a less than 10% duty cycle with a maximum duration of 500 µs. Consult Packaging Section of Databook for thermal limitations and
considerations of package.