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APW7108 Datasheet(PDF) 4 Page - Anpec Electronics Coropration |
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APW7108 Datasheet(HTML) 4 Page - Anpec Electronics Coropration |
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4 / 28 page  Copyright © ANPEC Electronics Corp. Rev. A.4 - Jan., 2009 APW7108 www.anpec.com.tw 4 Electrical Characteristics (Cont.) Refer to the typical application circuits. These specifications apply over VCC=5V, VIN=5~24V and TA= -40 ~ 85 °C, unless otherwise specified. Typical values are at TA=25°C. APW7108 Symbol Parameter Test Conditions Min. Typ. Max. Unit REFERENCE VOLTAGE VREF Reference Voltage - 0.9 - Accuracy -1.0 - +1.0 % Line Regulation VCC = 4.5V to 5.5V, VIN = 5~24V -0.1 - +0.1 % Load Regulation 0A < IOUT < 5A; 5V < VIN < 24V -1.0 - +1.0 % PWM CONVERTERS IVSEN VSEN Pin Bias Current -100 - +100 nA Minimum off-time of UGATE - 550 - ns VOUT Pin Input Impedance VOUT = 5V - 134 - k Ω VUV VSEN Under-Voltage Threshold ~ 2 µs noise filter, VSEN Falling 65 70 75 % VOV VSEN Over-Voltage Threshold ~ 2 µs noise filter, VSEN Rising 110 115 120 % SWITCHING FREQUENCY PWM1 294 345 396 FSW Switching Frequency in PWM mode DC output current PWM2 217 255 293 kHz MOSFET GATE DRIVERS UGATE Source Resistance VBOOT = 5V, IUGATE = 0.1A - 1 2 Ω UGATE Sink Resistance VBOOT = 5V, IUGATE = 0.1A - 0.9 1.8 Ω LGATE Source Resistance VCC = 5V, ILGATE= 0.1A - 1 2 Ω LGATE Sink Resistance VCC = 5V, ILGATE= 0.1A - 0.6 1.2 Ω TD Dead-Time - 25 - ns PGOOD AND CONTROL FUNCTIONS POK is high：~ 3 µs noise filter, VSEN is from low to target value 87 92 95 % PGOOD Threshold POK is high：~ 3 µs noise filter, VSEN is from high to target value 107 112 117 % POK Hysteresys - 3 - % PG1, PG2 Leakage Current VPG1,2 = 5.5V - - 1 µA VPG1, 2 PG1, PG2 Voltage Low IPG1,2 = -4mA - 0.5 1 V ISEN ISEN Sourcing Current By Design - - 260 µA Continuous-Conduction-Mode (CCM) Enforced (PFM Operation Inhibited) VOUTx pulled low - - 0.1 V Automatic CCM/PFM Operation Enabled VOUTx connected to the output 0.9 - - V SOFT-START, SOFT-STOP, AND ENABLE ISTART Soft-Start Current Source Sourcing current - 4.5 - µA ISTOP Soft-Stop Current Sink Sinking current - 2.2 - µA SOFTx Pull-Low Impedance - 2 - k Ω VST Soft-Start Complete Threshold - 1.5 - V Soft-Start Clamp Voltage Voltage Threshold of SOFT Pin - 2.4 - V EN Voltage Low (OFF) - - 0.8 V EN Voltage High (ON) 2.0 - - V |
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