Datasheet ADP5076 (Analog Devices) - 4

ADP5076 Data Sheet Parameter Symbol Min Typ Max Unit Test Conditions/Comments
INVERTING REGULATOR Adjustable Negative Output Voltage VNEG −30 V Reference Voltage VREF 1.60 V Reference Voltage Accuracy −0.5 +0.5 % TJ = 25°C −1.5 +1.5 % TJ = −40°C to +125°C Feedback Voltage VREF − VFB2 0.8 V VFB2 is the FB2 reference voltage Feedback Voltage Accuracy −0.5 +0.5 % TJ = 25°C −1.5 +1.5 % TJ = −40°C to +125°C Feedback Bias Current IFB2 0.1 μA Overvoltage Protection Threshold VOV2 0.74 V At FB2 pin after soft start has completed Load Regulation (∆(VREF − VFB2)/(VREF − 0.0004 %/mA ILOAD2 = 5 mA to 75 mA VFB2))/∆ILOAD2 Line Regulation (∆(VREF − VFB2)/(VREF − 0.003 %/V ILOAD2 = 25 mA VFB2))/ΔVPVIN EA Transconductance GM2 260 300 340 μA/V Power FET On Resistance RDS (ON) INVERTER 350 mΩ Power FET Maximum Drain Source VDS (MAX) INVERTER 39 V Voltage Current-Limit Threshold, Main Switch ILIM (INVERTER) 1.20 1.32 1.44 A Minimum On Time 60 ns Minimum Off Time 50 ns SOFT START Soft Start Timer for DC-DC Regulators tSS 4 ms SS pin = open 32 ms SS resistor = 50 kΩ to GND Hiccup Time tHICCUP 8 × tSS ms THERMAL SHUTDOWN Threshold TSHDN 150 °C Hysteresis THYS 15 °C 1 ILOADx is the current through a resistive load connected across the output capacitor (where x is 1 for the boost regulator load and 2 for the inverting regulator load). Rev. A | Page 4 of 23 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION PULSE WIDTH MODULATION (PWM) MODE PULSE SKIP MODULATION MODE UVLO OSCILLATOR AND SYNCHRONIZATION INTERNAL REGULATOR PRECISION ENABLING SOFT START SLEW RATE CONTROL CURRENT-LIMIT PROTECTION OVERVOLTAGE PROTECTION THERMAL SHUTDOWN STARTUP SEQUENCE APPLICATIONS INFORMATION COMPONENT SELECTION Feedback Resistors OUTPUT CAPACITORS Input Capacitor VREF Capacitor Soft Start Resistor Diodes Inductor Selection for the Boost Regulator Inductor Selection for the Inverting Regulator LOOP COMPENSATION Boost Regulator Inverting Regulator COMMON APPLICATIONS LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE