Datasheet ADP2127 (Analog Devices) - 9

Data Sheet ADP2126/ADP2127 VIN = 2.1V VIN = 2.1V OUTPUT VOLTAGE (50mV/DIV) 1.20V OFFSET OUTPUT VOLTAGE (50mV/DIV) 1.20V OFFSET 1 1 LOAD CURRENT (200mA/DIV) LOAD CURRENT (100mA/DIV) 4 4
-018 -021
TIME (40µs/DIV) TIME (20µs/DIV)
09658 09658 Figure 17. Load Transient Response, 0 mA to 150 mA, VIN = 2.1 V Figure 20. Load Transient Response, 250 mA to 420 mA, VIN = 2.1 V
VIN = 3.6V VIN = 3.6V OUTPUT VOLTAGE (50mV/DIV) 1.20V OFFSET OUTPUT VOLTAGE (50mV/DIV) 1.20V OFFSET 1 1 LOAD CURRENT (200mA/DIV) LOAD CURRENT (100mA/DIV) 4 4
019 022 8- 8-
TIME (40µs/DIV) TIME (20µs/DIV)
0965 0965 Figure 18. Load Transient Response, 0 mA to 150 mA, VIN = 3.6 V Figure 21. Load Transient Response, 250 mA to 420 mA, VIN = 3.6 V
VIN = 5.5V VIN = 5.5V OUTPUT VOLTAGE (50mV/DIV) OUTPUT VOLTAGE (50mV/DIV) 1.20V OFFSET 1.20V OFFSET 1 1 LOAD CURRENT (200mA/DIV) LOAD CURRENT (100mA/DIV) 4 4
-020 -023
TIME (40µs/DIV) TIME (20µs/DIV)
09658 09658 Figure 19. Load Transient Response, 0 mA to150 mA, VIN = 5.5 V Figure 22. Load Transient Response, 250 mA to 420 mA, VIN = 5.5 V Rev. B | Page 9 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS THERMAL CONSIDERATIONS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OVERVIEW EXTERNAL CLOCK (EXTCLK) ENABLE SPREAD SPECTRUM OSCILLATOR MODE SELECTION Pulse-Width Modulation (PWM) Mode Auto Mode (PFM and PWM Switching) Pulse Frequency Modulation (PFM) Mode Mode Transition INTERNAL CONTROL FEATURES Synchronous Rectification Soft Start PROTECTION FEATURES Overcurrent Protection Output Short-Circuit Protection (SCP) Thermal Shutdown (TSD) Protection Undervoltage Lockout (UVLO) TIMING CONSTRAINTS Shutdown Time Power-Off Time APPLICATIONS INFORMATION INDUCTOR SELECTION INPUT CAPACITOR SELECTION OUTPUT CAPACITOR SELECTION THERMAL CONSIDERATIONS PCB LAYOUT GUIDELINES OUTLINE DIMENSIONS ORDERING GUIDE