Datasheet ADP5133 (Analog Devices) - 4

ADP5133 Data Sheet BUCK1 AND BUCK2 SPECIFICATIONS
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. Al limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
Table 3. Parameter Symbol Test Conditions/Comments Min Typ Max Unit
INPUT CHARACTERISTICS Input Voltage Range VIN1, VIN2 PWM mode, ILOAD1 = ILOAD2 = 0 mA to 800 mA 2.3 5.5 V OUTPUT CHARACTERISTICS Output Voltage Limit VOUT1, VOUT2 0.62 V VOUT1, VOUT2 VIN < 4.1 V 0.6 V Output Voltage Accuracy ∆VOUT1/VOUT1, ∆VOUT2/VOUT2 PWM mode; ILOAD1 = ILOAD2 = 0 mA −1.8 +1.8 % 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 0.491 0.5 0.509 V PSM CURRENT THRESHOLD PSM to PWM Operation IPSM 100 mA OPERATING SUPPLY CURRENT IIN MODE = ground BUCK1 Only ILOAD1 = 0 mA, device not switching, all other 44 µA channels disabled BUCK2 Only ILOAD2 = 0 mA, device not switching, all other 75 µA channels disabled BUCK1 and BUCK2 ILOAD1 = ILOAD2 = 0 mA, device not switching 87 µA SWx CHARACTERISTICS SWx On Resistance RPFET PFET at VIN1 = 5 V 145 235 mΩ PFET at VIN1 = 3.6 V 180 295 mΩ RNFET NFET at VIN1 = 5 V 110 190 mΩ NFET at VIN1 = 3.6 V 125 220 mΩ Current Limit ILIMIT1, ILIMIT2 PFET switch peak current limit 1100 1350 mA ACTIVE PULL-DOWN RPDWN-B VIN1 = VIN2 = 3.6 V, channels disabled 75 Ω OSCILLATOR FREQUENCY fSW 2.5 3.0 3.5 MHz
INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS
TA = −40°C to +125°C, unless otherwise specified.
Table 4. Parameter Symbol Min Typ Max Unit
NOMINAL INPUT AND OUTPUT CAPACITOR RATINGS BUCK1, BUCK2 Input Capacitor Rating CMIN1, CMIN2 4.7 40 µF BUCK1, BUCK2 Output Capacitor Rating CMIN1, CMIN2 10 40 µF CAPACITOR ESR CESR 0.001 1 Ω Rev. A | Page 4 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATION CIRCUIT TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS GENERAL SPECIFICATIONS BUCK1 AND BUCK2 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 Auto PSM/PWM Operation PSM Current Threshold Oscillator/Phasing of Inductor Switching Short-Circuit Protection Soft Start Current Limit 100% Duty Operation Active Pull-Downs APPLICATIONS INFORMATION BUCK EXTERNAL COMPONENT SELECTION Feedback Resistors Inductor Output Capacitor Input Capacitor POWER DISSIPATION AND THERMAL CONSIDERATIONS BUCK REGULATOR POWER DISSIPATION JUNCTION TEMPERATURE PCB LAYOUT GUIDELINES TYPICAL APPLICATION SCHEMATICS OUTLINE DIMENSIONS ORDERING GUIDE