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NCP1597 Datasheet(PDF) 4 Page - ON Semiconductor |
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NCP1597 Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 13 page NCP1597A http://onsemi.com 4 ELECTRICAL CHARACTERISTICS (Vin = 4.0 V − 5.5 V, Vout = 1.2 V, TJ = +25°C for typical value; −40°C < TJ < 85°C for min/max values unless noted otherwise) Parameter Symbol Test Conditions Min Typ Max Unit Vin Input Voltage Range Vin 4.0 5.5 V VCC UVLO Threshold 3.2 3.5 3.8 V UVLO Hysteresis 335 mV VCC Quiescent Current IinVCC Vin = 5 V,VFB = 1.5 V, (No Switching) 1.7 2.0 mA VCCP Quiescent Current IinVCCP Vin = 5 V,VFB = 1.5 V, (No Switching) 25 mA Vin Shutdown Supply Current (Note 2) IQSHDN EN = 0 V 1.8 3.0 mA FEEDBACK VOLTAGE Reference Voltage VFB 0.788 0.800 0.812 V Feedback Input Bias Current IFB VFB = 0.8 V 10 100 nA Feedback Voltage Line Regulation Vin = 4.0 V to 5.5 V 0.06 %/V PWM Maximum Duty Cycle (Regulating) 82 85 % Minimum Controllable ON Time (Note 2) 50 ns PULSE−BY−PULSE CURRENT LIMIT Pulse−by−Pulse Current Limit (Regulation) ILIM 2.7 3.9 4.3 A Pulse−by−Pulse Current Limit (Soft−Start) ILIMSS 4.0 5.3 6.1 A OSCILLATOR Oscillator Frequency FSW 0.87 1.0 1.13 MHz MOSFET High Side MOSFET ON Resistance RDS(on) HS RDS(on) HS IDS = 100 mA, VGS = 5 V 140 200 mW High Side MOSFET Leakage (Note 2) VEN = 0 V, VSW = 0 V 10 mA Low Side MOSFET ON Resistance RDS(on) LS RDS(on) LS IDS = 100 mA, VGS = 5 V 90 125 mW Low Side MOSFET Leakage (Note 2) VEN = 0 V, VSW = 5 V 10 mA ENABLE (NCP1597A) EN HI Threshold ENHI 1.4 V EN LO Threshold ENLO 0.4 V EN Hysteresis 200 mV EN Pullup Current 1.4 3.0 mA SOFT−START Soft−Start Ramp Time tSS FSW = 1 MHz 1.0 ms Hiccup Timer 2.0 ms THERMAL SHUTDOWN Thermal Shutdown Threshold 185 °C Thermal Shutdown Hysteresis 30 °C 2. Guaranteed by design. Not production tested. |
Similar Part No. - NCP1597_13 |
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Similar Description - NCP1597_13 |
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