Datasheet ADP2230 (Analog Devices) - 10

ADP2230 Data Sheet LOAD CURRENT (100mA/DIV) LOAD CURRENT (100mA/DIV) 4 4 OUTPUT VOLTAGE (100mV/DIV) AC-COUPLED OUTPUT VOLTAGE (50mV/DIV) AC-COUPLED 1 1
037 034 5- 5-
TIME (40µs/DIV) TIME (40µs/DIV)
1070 1070 Figure 21. Load Transient Response, V Figure 24. Load Transient Response, VOUT = 1.8 V, PWM Mode, 50 mA to 250 mA OUT = 3.3 V, Auto Mode, 50 mA to 250 mA
LOAD CURRENT (200mA/DIV) LOAD CURRENT (100mA/DIV) 4 4 OUTPUT VOLTAGE (100mV/DIV) OUTPUT VOLTAGE (100mV/DIV) AC-COUPLED AC-COUPLED 1 1
038 035 5- 5-
TIME (40µs/DIV) TIME (40µs/DIV)
1070 1070 Figure 22. Load Transient Response, V Figure 25. Load Transient Response, VOUT = 1.8 V, PWM Mode, 200 mA to 600 mA OUT = 3.3 V, Auto Mode, 200 mA to 600 mA
ENx PIN (5V/DIV) LOAD CURRENT (50mA/DIV) 1 OUTPUT VOLTAGE (5V/DIV) 2 4 SWx PIN (5V/DIV) OUTPUT VOLTAGE (20mV/DIV) AC-COUPLED 3 INDUCTOR CURRENT (200mA/DIV) 1 4
039 05- 036 5-
TIME (40µs/DIV)
107
TIME (40µs/DIV)
1070 Figure 26. Startup, VOUT = 3.3 V, No Load Figure 23. Load Transient Response, VOUT = 1.8 V, PWM Mode, 10 mA to 110 mA Rev. A | Page 10 of 18 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATION CIRCUIT TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS RECOMMENDED COMPONENT SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OVERVIEW OPERATING CONDITIONS Input Voltage Output Voltage SYNC PIN CONTROL SCHEMES PWM Mode PSM/PWM Automatic Transitioning Mode External Clock Synchronization FEATURES DESCRIPTIONS Precision Enable Quick Output Discharge Output Short-Circuit Protection Undervoltage Lockout Thermal Shutdown Soft Start Current Limit 100% Duty Cycle APPLICATIONS INFORMATION SETTING THE OUTPUT VOLTAGE SELECTING THE INDUCTOR SELECTING THE INPUT AND OUTPUT CAPACITORS Input Capacitor Output Capacitor PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE