Datasheet ADP2138, ADP2139 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | Compact, 800 mA, 3 MHz, Step-Down DC-to-DC Converter with an Internal Discharge Switch |
| 页数 / 页 | 20 / 7 — Data Sheet. ADP2138/ADP2139. 1.825. 3.5. VIN = 2.3V. –40°C. 3.4. +25°C. … |
| 修订版 | C |
| 文件格式/大小 | PDF / 551 Kb |
| 文件语言 | 英语 |
Data Sheet. ADP2138/ADP2139. 1.825. 3.5. VIN = 2.3V. –40°C. 3.4. +25°C. IN = 3.6V. +85°C. 1.815. IN = 4.2V. 3.3. +125°C. VIN = 5.5V. 3.2. 1.805. 3.1. (V)
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Data Sheet ADP2138/ADP2139 1.825 3.5 VIN = 2.3V –40°C 3.4 V +25°C IN = 3.6V V +85°C 1.815 IN = 4.2V 3.3 +125°C VIN = 5.5V 3.2 z) 1.805 3.1 (V) Y (MH A C 3.0 UT EN O U V 1.795 2.9 EQ R F 2.8 1.785 2.7 2.6 1.775 2.5 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
009
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
012
IOUT (A) I
09496-
OUT (A)
09496- Figure 9. Load Regulation Across Input Voltage, VOUT = 1.8 V, PWM Mode Figure 12. Frequency vs. Output Current, Across Temperature, VOUT = 1.8 V, PWM Mode
0.815 3.5 VIN = 2.3V V 3.4 0.810 IN = 3.6V VIN = 4.2V 3.3 VIN = 5.5V 0.805 3.2 z) 3.1 0.800 (V) Y (MH A C 3.0 UT EN O 0.795 U V 2.9 EQ R F 2.8 0.790 VIN = 2.3V 2.7 VIN = 3.6V 0.785 VIN = 4.2V 2.6 VIN = 5.5V 0.780 2.5 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
010
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
013
I I OUT (A)
09496-
OUT (A)
09496- Figure 10. Load Regulation Across Input Voltage, VOUT = 0.8 V, PWM Mode Figure 13. Frequency vs. Output Current, Across Supply Voltage, VOUT = 1.8 V
3.378 90 VIN = 3.9V IOUT = 100µA V 80 I 3.358 IN = 4.2V OUT = 25mA VIN = 5.5V IOUT = 500mA 70 3.338 ) V m 60 ( 3.318 GE (V) 50 A 3.298 OLTA UT O 40 V T V 3.278 U TP 30 OU 3.258 20 3.238 10 3.218 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
011
2.3 2.8 3.3 3.8 4.3 4.8 5.3
034
I INPUT VOLTAGE (V) OUT (A)
09496- 09496- Figure 11. Load Regulation Across Input Voltage, VOUT = 3.3 V, PWM Mode Figure 14. Output Voltage Ripple vs. Input Voltage, Across Output Current, VOUT = 1.8 V Rev. C | Page 7 of 20 Document Outline Features Applications General Description Typical Applications Circuit Revision History Table of Contents Specifications Input and Output Capacitor, Recommended Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Scheme PWM Mode Power Save Mode Power Save Mode Current Threshold Enable/Shutdown Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit 100% Duty Operation Discharge Switch Applications Information ADIsimPower Design Tool External Component Selection Inductor Thermal Considerations PCB Layout Guidelines Evaluation Board Evaluation Board Layout Outline Dimensions Ordering Guide
009
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
012
IOUT (A) I
09496-
OUT (A)
09496- Figure 9. Load Regulation Across Input Voltage, VOUT = 1.8 V, PWM Mode Figure 12. Frequency vs. Output Current, Across Temperature, VOUT = 1.8 V, PWM Mode
0.815 3.5 VIN = 2.3V V 3.4 0.810 IN = 3.6V VIN = 4.2V 3.3 VIN = 5.5V 0.805 3.2 z) 3.1 0.800 (V) Y (MH A C 3.0 UT EN O 0.795 U V 2.9 EQ R F 2.8 0.790 VIN = 2.3V 2.7 VIN = 3.6V 0.785 VIN = 4.2V 2.6 VIN = 5.5V 0.780 2.5 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
010
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
013
I I OUT (A)
09496-
OUT (A)
09496- Figure 10. Load Regulation Across Input Voltage, VOUT = 0.8 V, PWM Mode Figure 13. Frequency vs. Output Current, Across Supply Voltage, VOUT = 1.8 V
3.378 90 VIN = 3.9V IOUT = 100µA V 80 I 3.358 IN = 4.2V OUT = 25mA VIN = 5.5V IOUT = 500mA 70 3.338 ) V m 60 ( 3.318 GE (V) 50 A 3.298 OLTA UT O 40 V T V 3.278 U TP 30 OU 3.258 20 3.238 10 3.218 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
011
2.3 2.8 3.3 3.8 4.3 4.8 5.3
034
I INPUT VOLTAGE (V) OUT (A)
09496- 09496- Figure 11. Load Regulation Across Input Voltage, VOUT = 3.3 V, PWM Mode Figure 14. Output Voltage Ripple vs. Input Voltage, Across Output Current, VOUT = 1.8 V Rev. C | Page 7 of 20 Document Outline Features Applications General Description Typical Applications Circuit Revision History Table of Contents Specifications Input and Output Capacitor, Recommended Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Scheme PWM Mode Power Save Mode Power Save Mode Current Threshold Enable/Shutdown Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit 100% Duty Operation Discharge Switch Applications Information ADIsimPower Design Tool External Component Selection Inductor Thermal Considerations PCB Layout Guidelines Evaluation Board Evaluation Board Layout Outline Dimensions Ordering Guide