Datasheet ADP2387 (Analog Devices) - 4

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ADP2387 Data Sheet SPECIFICATIONS
VPVIN = 12 V, TJ = −40°C to +125°C for minimum/maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted.
Table 1. Parameter Symbol Test Conditions/Comments Min Typ Max Unit
PVIN PVIN Voltage Range VPVIN 4.5 20 V Quiescent Current IQ No switching 2.4 2.9 3.6 mA Shutdown Current ISHDN EN = GND 50 80 110 µA PVIN Undervoltage Lockout Threshold UVLO PVIN rising 4.3 4.4 V PVIN falling 3.6 3.8 V FB FB Regulation Voltage VFB 0°C < TJ < 85°C 596.4 600 603.6 mV −10°C < TJ < +115°C 595.2 600 604.8 mV −40°C < TJ < +125°C 594 600 606 mV FB Bias Current IFB 0.01 0.1 µA ERROR AMPLIFIER (EA) Transconductance gm 380 480 580 µS EA Source Current ISOURCE 40 60 80 µA EA Sink Current ISINK 40 60 80 µA INTERNAL REGULATOR (VREG) VREG Voltage VVREG VPVIN = 12 V, IVREG = 50 mA 7.6 8 8.4 V Dropout Voltage VPVIN = 12 V, IVREG = 50 mA 350 mV Current-Limit Regulator 62 100 138 mA SW High-Side On Resistance1 RDSON_HS VBST − VSW = 5 V 44 70 mΩ Low-Side On Resistance1 RDSON_LS VVREG = 8 V 11 18 mΩ SW Minimum On Time tMIN_ON 130 165 ns SW Minimum Off Time tMIN_OFF 200 260 ns BST Bootstrap Voltage VBOOT 4.6 5 5.4 V OSCILLATOR (RT PIN) Switching Frequency fSW RT = 100 kΩ 540 600 660 kHz Switching Frequency Range 200 1400 kHz CURRENT LIMIT High-Side Peak RILIM = 44.2 kΩ 7.7 9.2 10.7 A RILIM = 66.5 kΩ 5.1 6.1 7.1 A RILIM = 133 kΩ 2.3 2.9 3.5 A Low-Side Negative2 2.5 A ILIM Voltage2 VILIM 0.6 V ILIM Current Range2 IILIM 4 15 µA SS Internal Soft Start 1600 Clock cycles SS Pin Pull-Up Current ISS_UP 2.2 3.1 3.8 µA PGOOD Power-Good Range FB Rising Threshold PGOOD from low to high 95 % FB Rising Hysteresis PGOOD from high to low 5 % FB Falling Threshold PGOOD from low to high 105 % FB Falling Hysteresis PGOOD from high to low 11.7 % Power-Good Deglitch Time PGOOD from low to high 1024 Clock cycles PGOOD from high to low 16 Clock cycles Power-Good Leakage Current VPGOOD = 5 V 0.01 0.1 µA Power-Good Output Low Voltage IPGOOD = 1 mA 125 190 mV Rev. C | Page 4 of 25 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME PRECISION ENABLE/SHUTDOWN INTERNAL REGULATOR (VREG) BOOTSTRAP CIRCUITRY OSCILLATOR SOFT START POWER GOOD PEAK CURRENT-LIMIT AND SHORT-CIRCUIT PROTECTION OVERVOLTAGE PROTECTION (OVP) UNDERVOLTAGE LOCKOUT (UVLO) THERMAL SHUTDOWN APPLICATIONS INFORMATION INPUT CAPACITOR SELECTION OUTPUT VOLTAGE SETTING VOLTAGE CONVERSION LIMITATIONS INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION PROGRAMMING INPUT VOLTAGE UVLO COMPENSATION DESIGN ADIsimPower DESIGN TOOL DESIGN EXAMPLE OUTPUT VOLTAGE SETTING FREQUENCY SETTING CURRENT-LIMIT THRESHOLD SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION COMPENSATION COMPONENTS SOFT START TIME PROGRAM INPUT CAPACITOR SELECTION RECOMMENDED EXTERNAL COMPONENTS CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATIONS CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE