Datasheet ADP5042 (Analog Devices) - 9

Data Sheet ADP5042 TYPICAL PERFORMANCE CHARACTERISTICS
VIN1 = VIN2 = VIN3 = AVIN = 5.0 V, TA = 25°C, unless otherwise noted.
SW 4 VOUT1 1 VOUT2 VOUT1 2 2 VOUT3 3 EN 1 LOAD 3
06 03 0 0 1- 1- 81 81 08 08
CH1 2.0V/DIV 1MΩ B CH1 4.0V/DIV 1MΩ B A CH1 2.24V 50µs/DIV W 20.0M A CH1 1.76V 200µs/DIV W 20.0M 20.0MS/s CH2 2.0V/DIV 1MΩ B 50.0MS/s CH2 3.0V/DIV 1MΩ B W 500M W 500M 50.0ns/pt CH3 2.0V/DIV 1MΩ B 20.0ns/pt CH3 200mA/DIV 1MΩ B W 20.0M W 20.0M CH4 5.0V/DIV 1MΩ BW 500M
Figure 3. 3-Channel Start-Up Waveforms Figure 6. Buck Startup, VOUT1 = 1.8 V, IOUT2 = 20 mA
1.0 3.34 –40°C 0.9 +25°C ) A +85°C m 3.32 0.8 ( NT ) 0.7 V ( 3.30 E 0.6 CURRE NT LTAG 0.5 O 3.28 CE V S E 0.4 UT UI P Q UT 3.26 0.3 M O E T VOUT1 = 1.8V, S 0.2 Y VOUT2 = VOUT = 3.3V 3.24 S 0.1
04 0 1- 1 8
0
08
3.22 2.3 2.8 3.3 3.8 4.3 4.8 5.3 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
7 00 1- 1
INPUT VOLTAGE (V) OUTPUT CURRENT (A)
88 0 Figure 4. System Quiescent Current (Sum of All the Input Currents) vs. Input Figure 7. Buck Load Regulation Across Temperature, VOUT1 = 3.3 V, Voltage, VOUT1 = 1.8 V, VOUT2 = VOUT3 = 3.3 V Auto Mode
1.830 –40°C 1.825 SW +25°C 4 +85°C 1.820 1.815 VOUT1 V) 2 E ( 1.810 G A T 1.805 L VO 1.800 T PU 1.795 T EN U 1 O 1.790 IIN 3 1.785
5 08 -00 0 1
1.780
1- 81 1 8 08
1.775
08
CH1 2.0V/DIV 1MΩ BW 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 CH2 2.0V/DIV 1MΩ B 50.0MS/s W 500M CH3 100mA/DIV 1MΩ B 20.0ns/pt OUTPUT CURRENT (A) W 20.0M CH4 5.0V/DIV 1MΩ BW 500M
Figure 5. Buck Startup, VOUT1 = 1.8 V, IOUT1 = 20 mA Figure 8. Buck Load Regulation Across Temperature, VOUT1 = 1.8 V, Auto Mode Rev. B | Page 9 of 30 Document Outline FEATURES HIGH LEVEL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS GENERAL SPECIFICATION SUPERVISORY SPECIFICATION BUCK SPECIFICATIONS LDO1, LDO2 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 EVALUATION BOARD SCHEMATICS AND ARTWORK SUGGESTED LAYOUT BILL OF MATERIALS APPLICATION DIAGRAM FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE