Datasheet ADP5043 (Analog Devices) - 9

Data Sheet ADP5043 TYPICAL PERFORMANCE CHARACTERISTICS
VIN1 = VIN2 = AVIN = 5.0 V, TA = 25°C, unless otherwise noted.
3.34 –40°C +25°C +85°C 3.32 VOUT1 1 ) V ( 3.30 E G LTA O 3.28 T V U VOUT2 TP 2 3.26 U O 3.24 3.22 CH1 2.0V/DIV 1MΩ BW 20.0M A CH1 1.76V 200µs/DIV
07 003
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
0
CH2 2.0V/DIV 1MΩ B 20.0ns/pt W 20.0M
82- 682-
OUTPUT CURRENT (A)
09 096 Figure 3. 3-Channel Start-Up Waveforms Figure 6. Buck Load Regulation Across Temperature, VOUT1 = 3.3 V, Auto Mode
1.0 1.830 –40°C 0.9 1.825 +25°C A) +85°C m 0.8 1.820 ( T N ) 1.815 0.7 V ( E 1.810 0.6 G CURRE T 1.805 LTA 0.5 EN O 1.800 T V 0.4 IESC U U 1.795 TP 0.3 U O EM Q 1.790 V 0.2 OUT1 = 1.5V, VOUT2 = 3.3V 1.785 SYST 0.1 1.780 0 1.775 2.3 2.8 3.3 3.8 4.3 4.8 5.3
08 004
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
0 82- 82-
INPUT VOLTAGE (V) OUTPUT CURRENT (A)
096 096 Figure 4. System Quiescent Current (Sum of All the Input Currents) vs. Input Figure 7. Buck Load Regulation Across Temperature, VOUT1 = 1.8 V, Auto Mode Voltage, VOUT1 = 1.5 V, VOUT2 = 3.3 V
1.795 1.794 SW +85°C 4 1.793 ) 1.792 VOUT1 V ( +25°C 2 1.791 GE 1.790 LTA O V 1.789 T U 1.788 TP EN 1 OU 1.787 IIN 3 1.786 –40°C 1.785 1.784 CH1 2.0V/DIV 1MΩ B
09
W 20.0M A CH1 2.92V 50µs/DIV 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
-0
CH2 2.0V/DIV 1MΩ B 50.0MS/s W 500M OUTPUT CURRENT (A)
682
CH3 100mA/DIV 1MΩ B 20.0ns/pt
05 09
W 20.0M
0
CH4 5.0V/DIV 1MΩ B
82-
W 500M
096 Figure 5. Buck Startup, VOUT1 = 1.8 V, IOUT1 = 20 mA Figure 8. Buck Load Regulation Across Temperature, VOUT1 = 1.8 V, PWM Mode Rev. B | Page 9 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