Datasheet ADP5310 (Analog Devices) - 6

ADP5310 Data Sheet Parameter Symbol Min Typ Max Unit Test Conditions/Comments
Adjustable Feedback Voltage VFB2_ADJ −0.55 +0.55 % TJ = 25°C Accuracy −1.2 +1.0 % 0°C ≤ TJ ≤ 85°C −1.5 +1.5 % −40°C ≤ TJ ≤ +125°C Feedback Bias Current IFB2_ADJ 15 200 nA Adjustable voltage option Feedback Resistor to GND IFB2_FIX 57 MΩ Fixed voltage option FB2 Pin in Hysteresis Mode Threshold Accuracy from Active VFB2_HYS −1.5 +1.5 % Mode to Standby Mode Hysteresis of Threshold Accuracy VFB2_HYS(HYS) 1 % from Active Mode to Standby Mode SW2 Pin High-Side Power FET RDS(ON)2H 868 1250 mΩ Pin to pin measurement On Resistance Low-Side Power FET RDS(ON)2L 893 1360 mΩ Pin to pin measurement On Resistance Current-Limit Threshold in PWM ITH(ILIM2) 450 600 730 mA SYNC/MODE = high Mode Peak Inductor Current in IL2 300 mA SYNC/MODE = low Hysteresis Mode Minimum On Time tMIN_ON2 36 70 ns Soft Start Time tSS2 350 µs Factory trim, 1 bit (350 µs, 2800 µs) COUT Discharge Switch On Resistance RDIS2 282 Ω CHANNEL 3 LOAD SWTICH Supply Voltage Range VIN3 1.65 5.5 V FB2 pin FB2 to VOUT3 On Resistance RDS(ON)3 382 550 mΩ VOUT3 = 5.0 V, ILOAD3 = 50 mA 430 615 mΩ VOUT3 = 3.3 V, ILOAD3 = 50 mA 494 700 mΩ VOUT3 = 2.5 V, ILOAD3 = 50 mA VOUT3 TIME Turn On Rise Time tRISE3 12 16 µs VOUT3 = 2.5 V, CLOAD3 = 1 µF, factory trim, 2 bits (3 µs, 12 µs, 48 µs, 192 µs) COUT Discharge Switch On Resistance RDIS3 286 Ω Rev. A | Page 6 of 28 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS BUCK REGULATORS AND LOAD SWITCH SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATION MODES PWM Mode PSM Mode Hysteresis Mode Mode Selection ADJUSTABLE AND FIXED OUTPUT VOLTAGES UNDERVOLTAGE LOCKOUT (UVLO) ENABLE AND SHUTDOWN FEATURES INTERNAL LINEAR REGULATOR (VREG) OSCILLATOR AND SYNCHRONIZATION CURRENT LIMIT SHORT-CIRCUIT PROTECTION SOFT START STARTUP WITH PRECHARGED OUTPUT 100% DUTY OPERATION ACTIVE DISCHARGE POWER-GOOD FUNCTION LOAD SWITCH THERMAL SHUTDOWN APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION SELECTING THE INDUCTOR OUTPUT CAPACITOR INPUT CAPACITOR ADJUSTABLE OUTPUT VOLTAGE PROGRAMMING EFFICIENCY Power Switch Conduction Losses Inductor Losses Driver Losses Transition Losses RECOMMENDED BUCK EXTERNAL COMPONENTS CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE