Datasheet ISL97801 (Intersil) - 2

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Absolute Maximum Ratings
(TA = +25°C)
Thermal Information
Maximum pin voltage, all pins except below 6.5V Thermal Resistance JA (°C/W) / JC (°C/W) VIN, SWS1, SWS2, EN/PWM . .18V QFN-20 Package (Notes 1, 2) . 39 2.5 VBAT, FAULT, FB . .24V Maximum Junction Temperature . +135°C |VHI - SWS1, SWS2| . 6.5V Storage Temperature . .-65°C to +150°C SWD1, SWD2, OVP. .34V Continuous Output Current . .1A
Operating Conditions
Temperature Range . .-40°C to +105°C CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA Operating continuously at a junction temperature of +135°C will shorten the life of the device while the thermal shutdown may trigger at a higher temperature than +135°C since it is a typical number. NOTE: 1. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech Brief TB379. 2. For JC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
VBAT = VIN = 12V, VDC = 5V, TA = -40°C to +105°C unless otherwise specified.
PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT
VIN Input Supply Voltage IOUT = 350mA, 8 LEDs, BUCK/BOOSTN = 5 16 V GND VIN Input Supply Voltage IOUT = 350mA, 5 LEDs, BUCK/BOOSTN = 2.7 12 V GND, TMAX disabled VBAT Input Supply Monitor Normal operating range 2.7 16 V VBATFAULT Supply Fault Threshold If VBAT > VBATFAULT, FAULT pin is 17.6 21 24 V switched to ground ISEN Supply Current in VIN No switching, EN/PWM = 1 2.7 3.5 mA ISDIS Supply Current in VIN No switching, EN/PWM = 0 0.6 2.5 µA RSWITCH Power FET On Resistance ISWITCH = 600mA 0.15 0.25 VDC Regulated Auxiliary Supply 4.75 5 5.25 V ROUTOL Auxiliary Supply Open Loop Output VIN < VDC 40 Resistance ROUTCL Auxiliary Supply Closed Loop Output VIN > 6V, F < 100Hz 6.5 Resistance IOUT Output Drive Current 4 LED output string. VIN = VBAT = 10V 1 A ILIMBOOST Power Switch Current Limit BUCK/BOOSTN = GND 3.6 A ILIMBUCK Power Switch Current Limit BUCK/BOOSTN = VDC 2.4 A OVPH Over Voltage Positive Going Voltage Upper threshold to enter overvoltage fault 31 32 V Mode Threshold mode, TA = +25°C OVPL Over Voltage Negative Going Voltage Lower threshold to exit overvoltage fault 20 23 V Mode Threshold mode, TA = +25°C VGATE Protection FET VGS (gate clamp) VIN - VFAULT 9.76 12.2 14.64 V VGATE Protection FET VGS (gate clamp) VFAULT - VIN 8.16 10.2 12.24 V VFB Feedback Voltage System in regulation, VLEVEL = 1V, 0.19 0.2 0.21 V VIN = 12V, 6 LEDs FN6428 Rev 1.00 Page 2 of 20 April 2, 2007