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ISL8844AAUZ Datasheet(PDF) 7 Page - Intersil Corporation |
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ISL8844AAUZ Datasheet(HTML) 7 Page - Intersil Corporation |
7 / 15 page 7 FN6320.3 April 18, 2007 Input Signal, Maximum 0.97 1.00 1.03 V Gain, ACS = ΔVCOMP/ΔVCS 0 < VCS < 910mV, VFB = 0V 2.5 3.0 3.5 V/V CS to OUT Delay -35 55 ns ERROR AMPLIFIER Open Loop Voltage Gain (Note 5) 60 90 - dB Unity Gain Bandwidth (Note 5) 1.0 1.5 - MHz Reference Voltage VFB = VCOMP 2.475 2.500 2.530 V FB Input Bias Current VFB = 0V -1.0 -0.2 1.0 μA COMP Sink Current VCOMP = 1.5V, VFB = 2.7V 1.0 - - mA COMP Source Current VCOMP = 1.5V, VFB = 2.3V -0.4 - - mA COMP VOH VFB = 2.3V 4.80 - VREF V COMP VOL VFB = 2.7V 0.4 - 1.0 V PSRR Frequency = 120Hz, VDD = 12V to 30V (Note 5) 60 80 - dB OSCILLATOR Frequency Accuracy Initial, TA = +25°C 48 51 53 kHz Frequency Variation with VDD TA= +25°C, (f30V - f10V)/f30V -0.2 1.0 % Temperature Stability (Note 5) - - 5 % Amplitude, Peak to Peak Static Test - 1.75 - V RTCT Discharge Voltage (Valley Voltage) Static Test - 1.0 - V Discharge Current RTCT = 2.0V 6.5 7.8 8.5 mA OUTPUT Gate VOH VDD to OUT, IOUT = -200mA - 1.0 2.0 V Gate VOL OUT to GND, IOUT = 200mA - 1.0 2.0 V Peak Output Current COUT = 1nF (Note 5) - 1.0 - A Rise Time COUT = 1nF (Note 5) - 20 40 ns Fall Time COUT = 1nF (Note 5) - 20 40 ns GATE VOL UVLO Clamp Voltage VDD = 5V, ILOAD = 1mA - - 1.2 V PWM Maximum Duty Cycle (ISL8840A, ISL8842A, ISL8843A) COMP = VREF 94.0 96.0 - % Maximum Duty Cycle (ISL8841A, ISL8844A, ISL8845A) COMP = VREF 47.0 48.0 - % Minimum Duty Cycle COMP = GND - - 0 % NOTES: 3. Specifications at -40°C and +105°C are guaranteed by +25°C test with margin limits. 4. This is the VDD current consumed when the device is active but not switching. Does not include gate drive current. 5. These parameters, although guaranteed, are not 100% tested in production. 6. Adjust VDD above the start threshold and then lower to 15V. Electrical Specifications ISL884xAA - Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application schematic onpage 3 and page 4. VDD = 15V, RT = 10kΩ, CT = 3.3nF, TA = -40 to +105°C (Note 3). Typical values are at TA = +25°C (Continued) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A |
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