Datasheet ADP5041 (Analog Devices) - 5

Data Sheet ADP5041 LDO1, LDO2 SPECIFICATIONS
VIN2, VIN3 = (VOUT2, VOUT3 + 0.5 V) or 1.7 V (whichever is greater) to 5.5 V; AVIN, VIN1 ≥ VIN2, VIN3; CIN = 1 µF, COUT = 2.2 µF; TJ= −40°C to +125°C for minimum/maximum specifications and TA = 25°C for typical specifications, unless otherwise noted.1
Table 4. Parameter Symbol Conditions Min Typ Max Unit
INPUT VOLTAGE RANGE VIN2, VIN3 TJ = −40°C to +125°C 1.7 5.5 V OPERATING SUPPLY CURRENT Bias Current per LDO2 IVIN2BIAS/IVIN3BIAS IOUT3 = IOUT4 = 0 µA 10 30 µA IOUT2 = IOUT3 = 10 mA 60 100 µA IOUT2 = IOUT3 = 300 mA 165 245 µA Total System Input Current IIN Includes all current into AVIN, VIN1, VIN2, and VIN3 LDO1 or LDO2 Only IOUT2 = IOUT3 = 0 µA, all other channels disabled 53 µA LDO1 and LDO2 Only IOUT2 = IOUT3 = 0 µA, buck disabled 74 µA OUTPUT VOLTAGE ACCURACY VOUT2, VOUT3 100 µA < IOUT2 < 300 mA, 100 µA < IOUT3 < 300 mA −3 +3 % VIN2 = (VOUT2 + 0.5 V) to 5.5 V VIN3 = (VOUT3 + 0.5 V) to 5.5 V REFERENCE VOLTAGE VFB2,VFB3 0.485 0.500 0.515 V REGULATION Line Regulation (ΔVOUT2/VOUT2)/ΔVIN2 VIN2 = (VOUT2 + 0.5 V) to 5.5 V −0.03 +0.03 %/ V (ΔVOUT3/VOUT3)/ΔVIN3 VIN3 = (VOUT3 + 0.5 V) to 5.5 V IOUT2 = IOUT3 = 1 mA Load Regulation3 (ΔVOUT2/VOUT2)/ΔIOUT2 IOUT2 = IOUT3 = 1 mA to 300 mA 0.002 0.0075 %/mA (ΔVOUT3/VOUT3)/ΔIOUT3 DROPOUT VOLTAGE4 VDROPOUT VOUT2 = VOUT3 = 5.0 V, IOUT2 = IOUT3 = 300 mA 72 mV VOUT2 = VOUT3 = 3.3 V, IOUT2 = IOUT3 = 300 mA 86 140 mV VOUT2 = VOUT3 = 2.5 V, IOUT2 = IOUT3 = 300 mA 107 mV VOUT2 = VOUT3 = 1.8 V, IOUT2 = IOUT3 = 300 mA 180 mV ACTIVE PULL-DOWN RPDLDO EN2/EN3 = 0 V 600 Ω CURRENT-LIMIT THRESHOLD5 ILIMIT TJ = −40°C to +125°C 335 470 mA OUTPUT NOISE OUTLDO2NOISE 10 Hz to 100 kHz, VIN3 = 5 V, VOUT3 = 3.3 V 123 µV rms 10 Hz to 100 kHz, VIN3 = 5 V, VOUT3 = 2.8 V 110 µV rms 10 Hz to 100 kHz, VIN3 = 5 V, VOUT3 = 1.5 V 59 µV rms OUTLDO1NOISE 10 Hz to 100 kHz, VIN2 = 5 V, VOUT2 = 3.3 V 140 µV rms 10 Hz to 100 kHz, VIN2 = 5 V, VOUT2 = 2.8 V 129 µV rms 10 Hz to 100 kHz, VIN2 = 5 V, VOUT2 = 1.5 V 66 µV rms POWER SUPPLY REJECTION PSRR 1 kHz, VIN2, VIN3 = 3.3 V, VOUT2, VOUT3 = 2.8 V, 66 dB RATIO IOUT = 100 mA 100 kHz, VIN2, VIN3 = 3.3 V, VOUT2, VOUT3 = 2.8 V, 57 dB IOUT = 100 mA 1 MHz, VIN2, VIN3 = 3.3 V, VOUT2, VOUT3 = 2.8 V, 60 dB IOUT = 100 mA 1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). 2 This is the input current into VIN2 and VIN3 that is not delivered to the output load. 3 Based on an end-point calculation using 1 mA and 300 mA loads. 4 Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal output voltage. This applies only to output voltages above 1.7 V. 5 Current-limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, the current limit for a 3.0 V output voltage is defined as the current that causes the output voltage to drop to 90% of 3.0 V, or 2.7 V. Rev. A | Page 5 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