Datasheet ADP5310 (Analog Devices) - 5

Data Sheet ADP5310 BUCK REGULATORS AND LOAD SWITCH SPECIFICATIONS
VIN = 6 V, VREG = 3.9 V, TJ = −40°C to +125°C for minimum and maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted.
Table 2. Parameter Symbol Min Typ Max Unit Test Conditions/Comments
CHANNEL 1 SYNC BUCK REGULATOR Supply Voltage Range VIN1 2.7 15.0 V PVIN1 pin Rating Output Current IOUT 800 mA FB1 Pin in PWM Mode Fixed Output Options VOUT1_FIX 1.2 5.0 V Factory trim, 3 bits (adjustable, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V) Fixed Output Accuracy VFB1_FIX −1.5 +1.5 % Adjustable Output Voltage Range VOUT1_ADJ 0.8 PVIN1 V Adjustable voltage option Adjustable Feedback Voltage VFB1 0.800 V Adjustable voltage option Adjustable Feedback Voltage VFB1_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 FB1 Pin in PSM Mode Threshold Accuracy from Active VFB1_PSM −1.5 +1.5 % Mode to Skip Mode Hysteresis of Threshold Accuracy VFB1_PSM(PSM) 1 % from Active Mode to Skip Mode Feedback Bias Current IFB1 0.1 µA Adjustable voltage option SW1 Pin High-Side Power FET On RDS(ON)1H 472 690 mΩ Pin to pin measurement Resistance Low-Side Power FET On RDS(ON)1L 438 725 mΩ Pin to pin measurement Resistance Current-Limit Threshold ITH(ILIM1) 1000 1260 1450 mA Minimum On Time tMIN_ON1 38 70 ns Soft Start Time tSS1 350 µs Factory trim, 1 bit (350 µs, 2800 µs) COUT Discharge Switch On Resistance RDIS1 287 Ω CHANNEL 2 SYNC BUCK REGULATOR Supply Voltage Range VIN2 2.7 15.0 V PVIN2 pin Rating Output Current Hysteresis Mode IOUT_HYS 50 mA PWM Mode IOUT_PWM 300 mA Mode Transition Transition Delay from Hysteresis THYS_TO_PWM 8 Clock SYNC/MODE goes logic high Mode to PWM Mode cycles from logic low FB2 Pin in PWM Mode Fixed Output Options VOUT2_FIX 1.2 5.0 V Factory trim, 8 bits (adjustable, 1.2 V to 3.6 V in 50 mV steps, and 3.6 V to 5.0 V in 100 mV steps) Fixed Output Accuracy VFB2_FIX −1.5 +1.5 % Adjustable Output Voltage Range VOUT2_ADJ 0.8 PVIN2 V Adjustable voltage option (note that Channel 3 has no use in this setting) Adjustable Feedback Voltage VFB2 0.800 V Adjustable voltage option Rev. A | Page 5 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