Datasheet ADP5302 (Analog Devices) - 8
| 制造商 | Analog Devices |
| 描述 | 50 mA/500 mA, Ultralow Power Step-Down Regulator with Battery Voltage Monitor |
| 页数 / 页 | 22 / 8 — ADP5302. Data Sheet. TYPICAL PERFORMANCE CHARACTERISTICS. 100. NCY. ICI. … |
| 修订版 | A |
| 文件格式/大小 | PDF / 758 Kb |
| 文件语言 | 英语 |
ADP5302. Data Sheet. TYPICAL PERFORMANCE CHARACTERISTICS. 100. NCY. ICI. VIN = 2.5V. VIN = 3.0V. VIN = 3.6V. VIN = 4.2V. VIN = 5.0V
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ADP5302 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS
VIN =3.6 V, VOUT = 2.5 V, L1 = 2.2 µH, CIN = COUT = 10 μF, fSW = 2 MHz, TA = 25°C, unless otherwise noted.
100 100 90 90 80 80 %) %) ( ( 70 NCY NCY E E 70 ICI 60 ICI F F F F E VIN = 2.5V E 60 VIN = 2.5V 50 VIN = 3.0V VIN = 3.0V VIN = 3.6V VIN = 3.6V VIN = 4.2V 50 VIN = 4.2V 40 VIN = 5.0V VIN = 5.0V VIN = 6.0V VIN = 6.0V 30 40 0.001 0.01 0.1 1 10
004
0.001 0.01 0.1 1 10
007
LOAD CURRENT (mA)
13443-
LOAD CURRENT (mA)
13443- Figure 4. Hysteresis Efficiency vs. Load Current, VOUT = 1.2 V Figure 7. Hysteresis Efficiency vs. Load Current, VOUT = 1.5 V
100 100 90 90 80 %) %) ( ( 80 NCY NCY E 70 E ICI ICI F F F F 70 E E 60 VIN = 2.5V VIN = 3.0V VIN = 3.0V VIN = 3.6V VIN = 3.6V 60 50 VIN = 4.2V VIN = 4.2V VIN = 5.0V VIN = 5.0V VIN = 6.0V VIN = 6.0V 40 50 0.001 0.01 0.1 1 10
005
0.001 0.01 0.1 1 10
008
LOAD CURRENT (mA)
13443-
LOAD CURRENT (mA)
13443- Figure 5. Hysteresis Efficiency vs. Load Current, VOUT = 1.8 V Figure 8. Hysteresis Efficiency vs. Load Current, VOUT = 2.5 V
100 100 90 90 80 70 %) ( 80 (%) 60 Y C NCY N E 50 IE ICI F 40 F 70 FFIC E E VIN = 2.5V 30 VIN = 3.0V VIN = 3.6V VIN = 3.6V 60 20 VIN = 4.2V VIN = 4.2V VIN = 5.0V 10 VIN = 5.0V VIN = 6.0V VIN = 6.0V 50 0
009
0.001 0.01 0.1 1 10
006
0 100 200 300 400 500 LOAD CURRENT (mA) LOAD CURRENT (mA)
13443- 13443- Figure 6. Hysteresis Efficiency vs. Load Current, VOUT = 3.3 V Figure 9. PWM Efficiency vs. Load Current, VOUT = 1.2 V Rev. A | Page 8 of 22 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATIONAL MODES PWM Mode Hysteresis Mode Mode Selection OSCILLATOR AND SYNCHRONIZATION ADJUSTABLE AND FIXED OUTPUT VOLTAGES UNDERVOLTAGE LOCKOUT (UVLO) ENABLE/DISABLE CURRENT LIMIT SHORT-CIRCUIT PROTECTION SOFT START STARTUP WITH PRECHARGED OUTPUT 100% DUTY OPERATION ACTIVE DISCHARGE VINOK FUNCTION STOP SWITCHING THERMAL SHUTDOWN APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION SELECTING THE INDUCTOR OUTPUT CAPACITOR INPUT CAPACITOR EFFICIENCY Power Switch Conduction Losses Inductor Losses Driver Losses Transition Losses PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE
VIN =3.6 V, VOUT = 2.5 V, L1 = 2.2 µH, CIN = COUT = 10 μF, fSW = 2 MHz, TA = 25°C, unless otherwise noted.
100 100 90 90 80 80 %) %) ( ( 70 NCY NCY E E 70 ICI 60 ICI F F F F E VIN = 2.5V E 60 VIN = 2.5V 50 VIN = 3.0V VIN = 3.0V VIN = 3.6V VIN = 3.6V VIN = 4.2V 50 VIN = 4.2V 40 VIN = 5.0V VIN = 5.0V VIN = 6.0V VIN = 6.0V 30 40 0.001 0.01 0.1 1 10
004
0.001 0.01 0.1 1 10
007
LOAD CURRENT (mA)
13443-
LOAD CURRENT (mA)
13443- Figure 4. Hysteresis Efficiency vs. Load Current, VOUT = 1.2 V Figure 7. Hysteresis Efficiency vs. Load Current, VOUT = 1.5 V
100 100 90 90 80 %) %) ( ( 80 NCY NCY E 70 E ICI ICI F F F F 70 E E 60 VIN = 2.5V VIN = 3.0V VIN = 3.0V VIN = 3.6V VIN = 3.6V 60 50 VIN = 4.2V VIN = 4.2V VIN = 5.0V VIN = 5.0V VIN = 6.0V VIN = 6.0V 40 50 0.001 0.01 0.1 1 10
005
0.001 0.01 0.1 1 10
008
LOAD CURRENT (mA)
13443-
LOAD CURRENT (mA)
13443- Figure 5. Hysteresis Efficiency vs. Load Current, VOUT = 1.8 V Figure 8. Hysteresis Efficiency vs. Load Current, VOUT = 2.5 V
100 100 90 90 80 70 %) ( 80 (%) 60 Y C NCY N E 50 IE ICI F 40 F 70 FFIC E E VIN = 2.5V 30 VIN = 3.0V VIN = 3.6V VIN = 3.6V 60 20 VIN = 4.2V VIN = 4.2V VIN = 5.0V 10 VIN = 5.0V VIN = 6.0V VIN = 6.0V 50 0
009
0.001 0.01 0.1 1 10
006
0 100 200 300 400 500 LOAD CURRENT (mA) LOAD CURRENT (mA)
13443- 13443- Figure 6. Hysteresis Efficiency vs. Load Current, VOUT = 3.3 V Figure 9. PWM Efficiency vs. Load Current, VOUT = 1.2 V Rev. A | Page 8 of 22 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATIONAL MODES PWM Mode Hysteresis Mode Mode Selection OSCILLATOR AND SYNCHRONIZATION ADJUSTABLE AND FIXED OUTPUT VOLTAGES UNDERVOLTAGE LOCKOUT (UVLO) ENABLE/DISABLE CURRENT LIMIT SHORT-CIRCUIT PROTECTION SOFT START STARTUP WITH PRECHARGED OUTPUT 100% DUTY OPERATION ACTIVE DISCHARGE VINOK FUNCTION STOP SWITCHING THERMAL SHUTDOWN APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION SELECTING THE INDUCTOR OUTPUT CAPACITOR INPUT CAPACITOR EFFICIENCY Power Switch Conduction Losses Inductor Losses Driver Losses Transition Losses PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE