Datasheet ADP5022 (Analog Devices) - 8

ADP5022 TYPICAL PERFORMANCE CHARACTERISTICS
VIN1 = VIN2 = VIN3 = VDDA = 5.0 V, TA = 25°C, unless otherwise noted.
T T SW 4 VOUT1 1 VOUT 2 VOUT2 EN 2 1 IIN VOUT3 3 3
3
CH1 2.00V B
0
W CH2 2.00V BW M 200µs A CH1 1.92V CH1 2.00V BW CH2 50.0mA Ω BW M 40.0µs A CH3 2.2V
02 02 3-
CH3 2.00V BW B
3-
CH3 5.00V BW CH4 5.00V W
25
T 45.40%
25
T 11.20%
08 08 Figure 4. 3-Channel Start-Up Waveforms, VIN3 Cascaded from VOUT1 Figure 7. Buck2 Startup, VOUT2 = 1.8 V, IOUT2 = 5 mA
0.00010 0.15 0.14 0.00008 0.13 A) ( 0.12 NT 0.00006 0.11 A) A ( CURRE PSM TO PWM I IN 0.10 0.00004 UT P PWM TO PSM 0.09 UT O 0.08 0.00002 0.07 0 0.06
4
2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2 5.4
06
2.4 2.9 3.4 3.9 4.4 4.9 5.4
67 3- 0 3-
V
25
INPUT VOLTAGE (V) IN (V)
25 08 08 Figure 5. System Quiescent Current vs. Input Voltage, VOUT1 = 0.8 V, Figure 8. Buck 2 PSM to PWM Transition, VOUT2 = 1.8 V VOUT2 = 2.5 V, VIN3 = VOUT2, VOUT3 = 1.2 V, All Channels Unloaded
T T 3.354 A = +25°C TA = –40°C T SW A = +85°C 4 3.334 VOUT 2 3.314 ) V A ( T 3.294 EN OUV 1 IIN 3.274 3.254 3 3.234
1
CH1 2.00V BW CH2 50.0mA Ω BW M 40.0µs A CH3 2.2V
58 02
0 0.1 0.2 0.3 0.4 0.5 0.6
0
B
3-
CH3 5.00V B
3-
W CH4 5.00V W
25 25
T 11.20% IOUT (A)
08 08 Figure 6. Buck1 Startup, VOUT1 = 3.3 V, IOUT1 = 10 mA Figure 9. Buck1 Load Regulation Across Temperature, VOUT1 = 3.3 V, Auto Mode Rev. C | Page 8 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS BUCK1 AND BUCK2 SPECIFICATIONS LDO 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 Oscillator/Phasing of Inductor Switching Enable/Shutdown Short-Circuit Protection Soft Start Current Limit 100% Duty Operation LDO SECTION LDO Undervoltage Lockout APPLICATIONS INFORMATION BUCK EXTERNAL COMPONENT SELECTION Inductor Output Capacitor Input Capacitor LDO CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties PCB LAYOUT GUIDELINES EVALUATION BOARD SCHEMATICS AND ARTWORK SUGGESTED LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE