Datasheet ADP2102 (Analog Devices) - 10

ADP2102 Data Sheet 180 T TA = 25°C TA = 25°C 160 CH4: LX VOUT = 1.5V 140 mA) 120 V 4 OUT = 1.375V D ( L 100 HO S CH1: IL 80 HRE 1 T M 60 CH2: V S OUT P 40 2 20 L = 2.2µH 0 CH1 500mA Ω B B
028
W CH2 2.00V W M 10.0µs A CH4 2.72V
015
2.5 3.0 3.5 4.0 4.5 5.0 5.5 CH4 2.00V BW INPUT VOLTAGE (V) T 51.00%
06631- 06631- Figure 28. PSM Mode Operation at Light Loads (75 mA) Figure 31. Typical PSM Threshold vs. Input Voltage
T T TA = 25°C TA = 25°C CH1: IL CH1: VOUT (AC) 1 CH3: LX 1 3 CH4: VOUT CH2: ILOAD (0mA TO 300mA) 4 2 CH1 200mA Ω BW M 200ns A CH1 388mA CH1 50.0mV BW CH2 200mA Ω M 100µs A CH2 220mA
016 023
CH3 2.00V BW CH4 2.00V BW T –4.00000ns
06631-
T 23.60%
06631- Figure 29. CCM Mode Operation at Medium/Heavy Loads (0.3 A) Figure 32. Load Transient Response (VOUT = 1.2 V)
T VIN = 3.6V T T A = 25°C T V A = 25°C OUT = 1.5V ILOAD = 0mA - 75mA - 0mA CH1: LX CH1: VOUT (AC) 1 1 CH3: VOUT 75mA 3 CH2: IL CH2: ILOAD (0mA TO 300mA) 2 2 0mA 0mA
024 031
CH1 2.00V BW CH2 100mA Ω M 200µs A CH2 82.0mA CH1 50.0mV BW CH2 200mA Ω M 100µs A CH2 236mA
06631-
CH3 1.00V BW
06631- Figure 30. Light Load Behavior Figure 33. Load Transient Response (VOUT = 1.5 V) Rev. C | Page 10 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATION CIRCUIT REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE BOUNDARY CONDITION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME CONSTANT ON-TIME TIMER FORCED CONTINUOUS CONDUCTION MODE POWER SAVE MODE SYNCHRONOUS RECTIFICATION CURRENT LIMIT SOFT START ENABLE UNDERVOLTAGE LOCKOUT THERMAL SHUTDOWN APPLICATIONS INFORMATION INDUCTOR SELECTION INPUT CAPACITOR SELECTION OUTPUT CAPACITOR SELECTION TYPICAL APPLICATION CIRCUITS SETTING THE OUTPUT VOLTAGE EFFICIENCY CONSIDERATIONS Power Switch Conduction Losses Inductor Losses Switching Losses Transition Losses THERMAL CONSIDERATIONS DESIGN EXAMPLE Inductor Output Capacitor Input Capacitor Losses CIRCUIT BOARD LAYOUT RECOMMENDATIONS RECOMMENDED LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE