Datasheet ADP5041 (Analog Devices) - 3

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Data Sheet ADP5041 SPECIFICATIONS GENERAL SPECIFICATIONS
AVIN, VIN1 = 2.3 V to 5.5 V; AVIN, VIN1 ≥ VIN2, VIN3; VIN2, VIN3 = 1.7 V to 5.5 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
AVIN UNDERVOLTAGE LOCKOUT UVLOAVIN Input Voltage Rising UVLOAVINRISE Option 0 2.275 V Option 1 3.9 V Input Voltage Falling UVLOAVINFALL Option 0 1.95 V Option 1 3.1 V SHUTDOWN CURRENT IGND-SD ENx = GND 0.1 2 μA Thermal Shutdown Threshold TSSD TJ rising 150 °C Thermal Shutdown Hysteresis TSSD-HYS 20 °C START-UP TIME1 Buck tSTART1 250 μs LDO1, LDO2 tSTART2 VOUT2, VOUT3 = 3.3 V 85 μs ENx, WDI, MODE, MR INPUTS Input Logic High VIH 2.5 V ≤ AVIN ≤ 5.5 V 1.2 V Input Logic Low VIL 2.5 V ≤ AVIN ≤ 5.5 V 0.4 V Input Leakage Current VI-LEAKAGE ENx = AVIN or GND 0.05 1 μA OPEN-DRAIN OUTPUT nRSTO Output Voltage VOL1V AVIN ≥ 1.0 V, ISINK = 50 μA 0.3 V VOL1V2 AVIN ≥ 1.2 V, ISINK = 100 μA 0.3 V VOL2V7 AVIN ≥ 2.7 V, ISINK = 1.2 mA 0.3 V VOL4V5 AVIN ≥ 4.5 V, ISINK = 3.2 mA 0.4 V Open-Drain Reset Output Leakage AVIN = 5.5 V 1 μA Current 1 Start-up time is defined as the time from the moment EN1 = EN2 = EN3 transfers from 0 V to VAVIN to the moment VOUT1, VOUT2, and VOUT3 are reaching 90% of their nominal levels. Start-up times are shorter for individual channels if another channel is already enabled. See the Typical Performance Characteristics section for more information.
SUPERVISORY SPECIFICATIONS
AVIN, VIN1 = 2.3 V to 5.5 V; TJ = −40°C to +125°C for minimum/maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted.
Table 2. Parameter Min Typ Max Unit Test Conditions/Comments
SUPPLY Supply Current (Supervisory Circuit Only) 45 55 μA AVIN = VIN1 = EN1 = EN2 = EN3 = 5.5 V 43 52 μA AVIN = VIN1 = EN1 = EN2 = EN3 = 3.6 V THRESHOLD VOLTAGE 0.495 0.500 0.505 V RESET TIMEOUT PERIOD Option 0 24 30 36 ms Option 1 160 200 240 ms VCC TO RESET DELAY (tRD) 80 μs VIN falling at 1 mV/μs Rev. B | Page 3 of 40 Document Outline FEATURES FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS GENERAL SPECIFICATIONS SUPERVISORY SPECIFICATIONS BUCK SPECIFICATIONS LDO1, LDO2 SPECIFICATIONS INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER MANAGEMENT UNIT Thermal Protection Undervoltage Lockout Enable/Shutdown Active Pull-Down BUCK SECTION Control Scheme PWM Mode Power Save Mode (PSM) PSM Current Threshold Short-Circuit Protection Soft Start Current Limit 100% Duty Operation LDO SECTION SUPERVISORY SECTION Reset Output Manual Reset Input Watchdog Input APPLICATIONS INFORMATION BUCK EXTERNAL COMPONENT SELECTION Feedback Resistors Inductor Output Capacitor Input Capacitor LDO EXTERNAL COMPONENT SELECTION Feedback Resistors OUTPUT CAPACITOR Input Bypass Capacitor Input and Output Capacitor Properties SUPERVISORY SECTION Threshold Setting Resistors Watchdog Input Current Negative-Going Transients at the Monitored Rail Watchdog Software Considerations POWER DISSIPATION/THERMAL CONSIDERATIONS Buck Regulator Power Dissipation LDO Regulator Power Dissipation Junction Temperature APPLICATION DIAGRAM PCB LAYOUT GUIDELINES SUGGESTED LAYOUT BILL OF MATERIALS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE