Datasheet ADP2387 (Analog Devices) - 9

Data Sheet ADP2387 4.5 1.25 RISING RISING FALLING FALLING 4.4 1.20 4.3 (V) D ) L 4.2 V 1.15 O D ( L ESH 4.1 R HO H S 1.10 T O 4.0 HRE VL U 3.9 N T 1.05 N E PVI 3.8 1.00 3.7 3.6
1
0.95
1
–40 –20 0 20 40 60 80 100 120
0
–40 –20 0 20 40 60 80 100 120
014
TEMPERATURE (°C)
12643-
TEMPERATURE (°C)
12643- Figure 11. PVIN UVLO Threshold vs. Temperature Figure 14. EN Threshold vs. Temperature
3.20 606 3.15 604 A) µ ) ( mV NT ( 3.10 E 602 AG T CURRE L 3.05 O 600 -UP L UL 3.00 DBACK V 598 IN P E P E S F S 2.95 596 2.90 594 –40 –20 0 20 40 60 80 100 120
012
–40 –20 0 20 40 60 80 100 120
015
TEMPERATURE (°C)
12643-
TEMPERATURE (°C)
12643- Figure 12. SS Pin Pull-Up Current vs. Temperature Figure 15. Feedback Voltage vs. Temperature
630 8.4 RT = 100kΩ 8.3 620 8.2 ) 610 kHz E (V) ( G A 8.1 T NCY 600 L UE VO Q 8.0 EG RE F 590 VR 7.9 580 7.8 570 7.7 –40 –20 0 20 40 60 80 100 120
013
–40 –20 0 20 40 60 80 100 120
016
TEMPERATURE (°C)
12643-
TEMPERATURE (°C)
12643- Figure 13. Frequency vs. Temperature Figure 16. VREG Voltage vs. Temperature Rev. C | Page 9 of 25 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME PRECISION ENABLE/SHUTDOWN INTERNAL REGULATOR (VREG) BOOTSTRAP CIRCUITRY OSCILLATOR SOFT START POWER GOOD PEAK CURRENT-LIMIT AND SHORT-CIRCUIT PROTECTION OVERVOLTAGE PROTECTION (OVP) UNDERVOLTAGE LOCKOUT (UVLO) THERMAL SHUTDOWN APPLICATIONS INFORMATION INPUT CAPACITOR SELECTION OUTPUT VOLTAGE SETTING VOLTAGE CONVERSION LIMITATIONS INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION PROGRAMMING INPUT VOLTAGE UVLO COMPENSATION DESIGN ADIsimPower DESIGN TOOL DESIGN EXAMPLE OUTPUT VOLTAGE SETTING FREQUENCY SETTING CURRENT-LIMIT THRESHOLD SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION COMPENSATION COMPONENTS SOFT START TIME PROGRAM INPUT CAPACITOR SELECTION RECOMMENDED EXTERNAL COMPONENTS CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATIONS CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE