Datasheet ADP5043 (Analog Devices) - 5

Data Sheet ADP5043 BUCK SPECIFICATIONS
AVIN, VIN1 = 3.6 V, VOUT1 = 1.8 V, TJ = −40°C to +125°C for minimum/maximum specifications, L = 1 µH, COUT = 10 µF, and TA = 25°C for typical specifications, unless otherwise noted.1
Table 3. Parameter Test Conditions/Comments Min Typ Max Unit
INPUT CHARACTERISTICS Input Voltage Range (VIN1) 2.3 5.5 V OUTPUT CHARACTERISTICS Output Voltage Accuracy PWM mode, ILOAD = 100 mA −1 +1 % PSM mode −2 +2 % VIN1 = 2.3 V to 5.5 V, PWM mode, −3 +3 % ILOAD = 1 mA to 800 mA PWM TO POWER SAVE MODE CURRENT THRESHOLD 100 mA INPUT CURRENT CHARACTERISTICS DC Operating Current ILOAD = 0 mA, device not switching 21 35 μA Shutdown Current ENx = 0 V, TA = TJ = −40°C to +125°C 0.2 1.0 μA SW CHARACTERISTICS SW On Resistance PFET 180 240 mΩ PFET, AVIN = VIN1 = 5 V 140 190 mΩ NFET 170 235 mΩ NFET, AVIN = VIN1 = 5 V 150 210 mΩ Current Limit PFET switch peak current limit 1100 1360 1600 mA ACTIVE PULL-DOWN EN1 = 0 V 75 Ω OSCILLATOR FREQUENCY 2.5 3.0 3.5 MHz START-UP TIME 250 μs 1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
LDO SPECIFICATIONS
AVIN = 3.6 V, VIN2 = (VOUT2 + 0.2 V) or 2.3 V, whichever is greater; AVIN, VIN1 ≥ VIN2; IOUT = 10 mA; CIN = COUT = 1 µF; TA = 25°C, unless otherwise noted.
Table 4. Parameter Symbol Test Conditions/Comments Min Typ Max Unit
INPUT VOLTAGE RANGE VIN2 TJ = −40°C to +125°C 1.7 5.5 V OPERATING SUPPLY CURRENT (per LDO) IGND IOUT = 0 µA, VOUT = 3.3 V 15 µA IOUT = 0 µA, VOUT = 3.3 V, 50 µA TJ = −40°C to +125°C IOUT = 10 mA 67 µA IOUT = 10 mA, TJ = −40°C to +125°C 105 µA IOUT = 200 mA 100 µA IOUT = 200 mA, TJ = −40°C to +125°C 245 µA FIXED OUTPUT VOLTAGE ACCURACY VOUT2 IOUT = 10 mA −1 +1 % 100 µA < IOUT < 300 mA −2 +2 % VIN2 = (VOUT2 + 0.5 V) to 5.5 V 100 µA < IOUT < 300 mA −3 +3 % VIN2 = (VOUT2 + 0.5 V) to 5.5 V TJ = −40°C to +125°C Rev. B | Page 5 of 30 Document Outline FEATURES GENERAL DESCRIPTION HIGH LEVEL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS GENERAL SPECIFICATIONS SUPERVISORY SPECIFICATIONS BUCK SPECIFICATIONS LDO SPECIFICATIONS INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER MANAGEMENT UNIT Thermal Protection Undervoltage Lockout Enable/Shutdown 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 1 Input Watchdog 2 Input Watchdog Status Indicator APPLICATIONS INFORMATION BUCK EXTERNAL COMPONENT SELECTION Inductor Output Capacitor Input Capacitor LDO CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties SUPERVISORY SECTION Watchdog 1 Input Current Negative-Going VCC Transients Watchdog Software Considerations PCB LAYOUT GUIDELINES POWER DISSIPATION/THERMAL CONSIDERATIONS Buck Regulator Power Dissipation LDO Regulator Power Dissipation Junction Temperature EVALUATION BOARD SCHEMATICS AND ARTWORK SUGGESTED LAYOUT BILL OF MATERIALS APPLICATION DIAGRAM FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE