Datasheet ADP5303 (Analog Devices) - 5

Data Sheet ADP5303 Parameter Symbol Min Typ Max Unit Test Conditions/Comments
Hysteresis of Threshold Accuracy from VFB_HYS (HYS) 1 % Active Mode to Standby Mode Feedback Bias Current IFB 66 95 nA Output Option 0, VOUT = 2.5 V 25 45 nA Output Option 1, VOUT = 1.3 V SW PIN High-Side Power FET On Resistance RDS (ON) H 386 520 mΩ Pin to pin measurement Low-Side Power FET On Resistance RDS (ON) L 299 470 mΩ Pin to pin measurement Current-Limit in PWM Mode ILIM_PWM 800 1000 1200 mA SYNC/MODE = high Peak Current in Hysteresis Mode ILIM_HYS 265 mA SYNC/MODE = low Minimum On Time tMIN_ON 40 70 ns VINOK PIN VINOK Monitor Threshold Range VVINOK(RISE) 2.05 5.15 V Factory programmable VINOK Monitor Accuracy −1.5 +1.5 % TJ = 25°C −3 +3 % −40°C ≤ TJ ≤ +125°C VINOK Monitor Threshold Hysteresis VVINOK(HYS) 1.5 % VINOK Rising Delay tVINOK_RISE 190 µs VINOK Falling Delay tVINOK_FALL 130 µs Leakage Current for VINOK Pin IVINOK_LEAKAGE 0.1 1 µA Output Low Voltage for VINOK Pin VVINOK_LOW 50 100 mV IVINOK = 100 µA SOFT START Default Soft Start Time tSS 350 µs Factory trim, 1 bit (350 µs, 2800 µs) Start-Up Delay tSTART_DELAY 2 ms Delay from the EN pin being pul ed high COUT DISCHARGE SWITCH ON RESISTANCE RDIS 290 Ω THERMAL SHUTDOWN Threshold TSHDN 142 °C Hysteresis THYS 127 °C 1 SYNC refers to the synchronization function of the multifunction SYNC/MODE pin only. Rev. A | Page 5 of 21 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATIONAL MODES PWM Mode Hysteresis Mode Mode Selection OSCILLATOR AND SYNCHRONIZATION ADJUSTABLE AND FIXED OUTPUT VOLTAGES UNDERVOLTAGE LOCKOUT (UVLO) ENABLE/DISABLE CURRENT LIMIT SHORT-CIRCUIT PROTECTION SOFT START STARTUP WITH PRECHARGED OUTPUT 100% DUTY CYCLE OPERATION ACTIVE DISCHARGE VINOK FUNCTION THERMAL SHUTDOWN APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION SELECTING THE INDUCTOR OUTPUT CAPACITOR INPUT CAPACITOR EFFICIENCY Power Switch Conduction Losses Inductor Losses Driver Losses Transition Losses PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE