Datasheet ADP5037 (Analog Devices) - 4

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ADP5037 Data Sheet BUCK1 AND BUCK2 SPECIFICATIONS
VAVIN = VIN1 = VIN2 = 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.1
Table 3. Parameter Symbol Test Conditions/Comments Min Typ Max Unit
OUTPUT CHARACTERISTICS Output Voltage Accuracy ΔVOUT1/VOUT1, PWM mode; ILOAD1 = ILOAD2 = 0 mA −1.8 +1.8 % ΔVOUT2/VOUT2 Line Regulation (∆VOUT1/VOUT1)/∆VIN1, PWM mode −0.05 %/V (∆VOUT2/VOUT2)/∆VIN2 Load Regulation (∆VOUT1/VOUT1)/∆IOUT1, ILOAD = 0 mA to 800 mA, PWM mode −0.1 %/A (∆VOUT2/VOUT2)/∆IOUT2 VOLTAGE FEEDBACK VFB1, VFB2 Models with adjustable outputs 0.491 0.5 0.509 V OPERATING SUPPLY CURRENT MODE = ground BUCK1 Only IIN ILOAD1 = 0 mA, device not switching, all other 44 μA channels disabled BUCK2 Only IIN ILOAD2 = 0 mA, device not switching, all other 55 μA channels disabled BUCK1 and BUCK2 IIN ILOAD1 = ILOAD2 = 0 mA, device not switching, 67 μA LDO channels disabled PSM CURRENT THRESHOLD IPSM PSM to PWM operation 100 mA SW CHARACTERISTICS SW On Resistance RNFET VIN1 = VIN2 = 3.6 V 155 240 mΩ RPFET VIN1 = VIN2 = 3.6 V 205 310 mΩ RNFET VIN1 = VIN2 = 5.5 V 137 204 mΩ RPFET VIN1 = VIN2 = 5.5 V 162 243 mΩ Current Limit ILIMIT1, ILIMIT2 pFET switch peak current limit 1200 1550 1900 mA ACTIVE PULL-DOWN RPDWN-B Channel disabled 75 Ω OSCILLATOR FREQUENCY fSW 2.5 3.0 3.5 MHz 1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
LDO1 AND LDO2 SPECIFICATIONS
VIN3 = (VOUT3 + 0.5 V) or 1.7 V (whichever is greater) to 5.5 V, VIN4 = (VOUT4 + 0.5 V) or 1.7 V (whichever is greater) to 5.5 V; CIN = COUT = 1 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 Test Conditions/Comments Min Typ Max Unit
INPUT VOLTAGE RANGE VIN3, VIN4 1.7 5.5 V OPERATING SUPPLY CURRENT Bias Current per LDO2 IVIN3BIAS/IVIN4BIAS IOUT3 = IOUT4 = 0 µA 10 30 µA IOUT3 = IOUT4 = 10 mA 60 100 µA IOUT3 = IOUT4 = 300 mA 165 245 µA Total System Input Current IIN Includes all current into AVIN, VIN1, VIN2, VIN3, and VIN4 LDO1 or LDO2 Only IOUT3 = IOUT4 = 0 µA, all other channels disabled 53 µA LDO1 and LDO2 Only IOUT3 = IOUT4 = 0 µA, buck channels disabled 74 µA OUTPUT CHARACTERISTICS Output Voltage Accuracy ΔVOUT3/VOUT3, 100 µA < IOUT3 < 300 mA, 100 µA < IOUT4 < 300 mA −1.8 +1.8 % ΔVOUT4/VOUT4 Line Regulation (∆VOUT3/VOUT3)/∆VIN3, IOUT3 = IOUT4 = 1 mA −0.03 +0.03 %/V (∆VOUT4/VOUT4)/∆VIN4 Load Regulation3 (∆VOUT3/VOUT3)/∆IOUT3, IOUT3 = IOUT4 = 1 mA to 300 mA 0.001 0.003 %/mA (∆VOUT4/VOUT4)/∆IOUT4 Rev. D | Page 4 of 28 Document Outline Features Applications General Description Typical Application Circuit Revision History Specifications General Specifications BUCK1 and BUCK2 Specifications LDO1 and 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 BUCK1 and BUCK2 Control Scheme PWM Mode Power Save Mode (PSM) PSM Current Threshold Oscillator/Phasing of Inductor Switching Short-Circuit Protection Soft Start Current Limit 100% Duty Operation Active Pull-Downs LDO1 and LDO2 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 Power Dissipation and Thermal Considerations Buck Regulator Power Dissipation LDO Regulator Power Dissipation Junction Temperature PCB Layout Guidelines Typical Application Schematics Bill of Materials Outline Dimensions Ordering Guide