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ISL6421A Datasheet(PDF) 4 Page - Intersil Corporation |
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ISL6421A Datasheet(HTML) 4 Page - Intersil Corporation |
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4 / 12 page  4 FN9167.2 February 11, 2005 Absolute Maximum Ratings Thermal Information Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0V to 18.0V Logic Input Voltage Range (SDA, SCL, ENT) . . . . . . . . -0.5V to 7V Output Current . . . . . . . . . . . . . . . . . . . . Externally/Internally Limited Thermal Resistance (Notes 1, 2) θJA (°C/W) θJC (°C/W) QFN Package (Notes 1, 2). . . . . . . . . . 35 6 Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150°C Maximum Storage Temperature Range . . . . . . . . . . . -40°C to 150°C For recommended soldering conditions, see Tech Brief TB389. NOTE: The device junction temperature should be kept below 150°C. Thermal shut-down circuitry turns off the device if junction temperature exceeds +150°C typically. 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. NOTES: 1. θJA 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 θJC, the “case temp” location is the center of the exposed metal pad on the package underside. Electrical Specifications Vcc = 12V, TA = -20°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C. EN = H, LLC = L, ENT = L, DCL = L, DSQIN = L, Iout = 12mA, unless otherwise noted. See software description section for I2C access to the system. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage Range 812 14 V Standby Supply Current EN = L - 1.5 3.0 mA Supply Current IIN EN = LLC = VSEL = ENT = H, No Load - 4.0 8.0 mA UNDERVOLTAGE LOCKOUT Start Threshold 7.5 - 7.95 V Stop Threshold 7.0 - 7.55 V Start to Stop Hysteresis 350 400 500 mV SOFT-START COMP Rise Time (Note 2) (Note 4) - 1024 - Cycles OUTPUT VOLTAGE Output Voltage (Note 3) VOUT VSEL = L, LLC = L 12.74 13.0 13.26 V VOUT VSEL = L, LLC = H 13.72 14.0 14.28 V VOUT VSEL = H, LLC = L 17.64 18.0 18.36 V VOOU VSEL = H, LLC = H 18.62 19.0 19.38 V Line Regulation DVOUT VIN = 8V to 14V; VOUT = 13V - 4.0 40.0 mV VIN = 8V to 14V; VOUT = 18V - 4.0 60.0 mV Load Regulation DVOUT IO = 12mA to 450mA - 50 80 mV Dynamic Output Current Limiting IMAX DCL = L 500 - 625 mA Dynamic Overload Protection Off Time TOFF DCL = L, Output Shorted (Note 4) - 900 - ms Dynamic Overload Protection On Time TON -20- ms Output Backward Current IOBK EN = 0; VOBK = 24V - 2.0 3.0 mA 22kHz TONE Tone Frequency ftone ENT = H 20.0 22.0 24.0 kHz Tone Amplitude Vtone ENT = H 550 680 900 mV Tone Duty Cycle dctone ENT = H 405060 % Tone Rise or Fall Time Tr, Tf ENT = H 5 8 14 µs ISL6421A |
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