Datasheet ADP2140 (Analog Devices) - 9
| 制造商 | Analog Devices |
| 描述 | 3 MHz, 600 mA, Low Quiescent Current Buck with 300 mA LDO Regulator |
| 页数 / 页 | 32 / 9 — Data Sheet. ADP2140. 100. NCY. ICI. 2.5V. –40°C. 3.0V. –5°C. 4.0V. +25°C. … |
| 修订版 | A |
| 文件格式/大小 | PDF / 2.8 Mb |
| 文件语言 | 英语 |
Data Sheet. ADP2140. 100. NCY. ICI. 2.5V. –40°C. 3.0V. –5°C. 4.0V. +25°C. 5.0V. +85°C. 5.5V. +125°C. 1000. LOAD CURRENT (mA). –5°C +25°C. INPUT VOLTAGE
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Data Sheet ADP2140
VIN1 = 4 V, VOUT = 1.8 V, IOUT = 10 mA, CIN = COUT = 10 µF, TA = 25°C, unless otherwise noted.
100 100 90 90 80 80 70 70 %) %) ( 60 ( 60 NCY 50 NCY E 50 E ICI ICI F 40 F 40 F F E E 30 30 2.5V –40°C 20 3.0V 20 –5°C 4.0V +25°C 10 5.0V 10 +85°C 5.5V +125°C 0 0 1 10 100 1000
016
1 10 100 1000
019
LOAD CURRENT (mA) LOAD CURRENT (mA)
07932- 07932- Figure 16. Efficiency vs. Load Current, VOUT = 1.2 V, Different Input Voltages Figure 19. Efficiency vs. Load Current, VOUT = 3.3 V, Different Temperatures
100 100 90 90 80 80 70 70 %) %) ( 60 ( 60 NCY 50 NCY E 50 E ICI ICI F 40 F 40 F F E E 30 30 –40°C 20 20 –5°C +25°C 4.0V 10 10 +85°C 5.0V +125°C 5.5V 0 0 1 10 100 1000
017
1 10 100 1000
018
LOAD CURRENT (mA) LOAD CURRENT (mA)
07932- 07932- Figure 17. Efficiency vs. Load Current, VOUT = 1.2 V, Different Temperatures Figure 20. Efficiency vs. Load Current, VOUT = 3.3 V, Different Input Voltages
T INPUT VOLTAGE T INPUT VOLTAGE OUTPUT VOLTAGE OUTPUT VOLTAGE 2 2 1 1 SWITCH NODE SWITCH NODE 3 3 CH1 1.00V CH2 50.0mV M20.0µs A CH1 4.68V
020
CH1 1.00V CH2 20.0mV M20.0µs A CH1 4.68V
021
CH3 5.00V T 11.60% CH3 5.00V T 11.60%
07932- 07932- Figure 18. Line Transient, VOUT = 1.8 V, Power Save Mode, 50 mA, Figure 21. Line Transient, VOUT = 1.8 V, PWM Mode, 600 mA, VIN1 = 4 V to 5 V, VIN1 = 4 V to 5 V, 4 μs Rise Time 4 μs Rise Time Rev. A | Page 9 of 32 Document Outline Features Applications General Description Typical Application Circuits Revision History Specifications Recommended Specifications: Capacitors and Inductor Pin Configuration and Function Descriptions Typical Performance Characteristics Buck Output LDO Output Theory of Operation Buck Section Control Scheme PWM Operation PSM Operation Pulse Skipping Threshold Selected Features Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit Power-Good Pin LDO Section Applications Information Power Sequencing Power-Good Function External Component Selection Selecting the Inductor Output Capacitor Input Capacitor Efficiency Power Switch Conduction Losses Inductor Losses Switching Losses Transition Losses Recommended Buck External Components LDO Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties LDO as a Postregulator to Reduce Buck Output Noise Thermal Considerations PCB Layout Considerations Outline Dimensions Ordering Guide
VIN1 = 4 V, VOUT = 1.8 V, IOUT = 10 mA, CIN = COUT = 10 µF, TA = 25°C, unless otherwise noted.
100 100 90 90 80 80 70 70 %) %) ( 60 ( 60 NCY 50 NCY E 50 E ICI ICI F 40 F 40 F F E E 30 30 2.5V –40°C 20 3.0V 20 –5°C 4.0V +25°C 10 5.0V 10 +85°C 5.5V +125°C 0 0 1 10 100 1000
016
1 10 100 1000
019
LOAD CURRENT (mA) LOAD CURRENT (mA)
07932- 07932- Figure 16. Efficiency vs. Load Current, VOUT = 1.2 V, Different Input Voltages Figure 19. Efficiency vs. Load Current, VOUT = 3.3 V, Different Temperatures
100 100 90 90 80 80 70 70 %) %) ( 60 ( 60 NCY 50 NCY E 50 E ICI ICI F 40 F 40 F F E E 30 30 –40°C 20 20 –5°C +25°C 4.0V 10 10 +85°C 5.0V +125°C 5.5V 0 0 1 10 100 1000
017
1 10 100 1000
018
LOAD CURRENT (mA) LOAD CURRENT (mA)
07932- 07932- Figure 17. Efficiency vs. Load Current, VOUT = 1.2 V, Different Temperatures Figure 20. Efficiency vs. Load Current, VOUT = 3.3 V, Different Input Voltages
T INPUT VOLTAGE T INPUT VOLTAGE OUTPUT VOLTAGE OUTPUT VOLTAGE 2 2 1 1 SWITCH NODE SWITCH NODE 3 3 CH1 1.00V CH2 50.0mV M20.0µs A CH1 4.68V
020
CH1 1.00V CH2 20.0mV M20.0µs A CH1 4.68V
021
CH3 5.00V T 11.60% CH3 5.00V T 11.60%
07932- 07932- Figure 18. Line Transient, VOUT = 1.8 V, Power Save Mode, 50 mA, Figure 21. Line Transient, VOUT = 1.8 V, PWM Mode, 600 mA, VIN1 = 4 V to 5 V, VIN1 = 4 V to 5 V, 4 μs Rise Time 4 μs Rise Time Rev. A | Page 9 of 32 Document Outline Features Applications General Description Typical Application Circuits Revision History Specifications Recommended Specifications: Capacitors and Inductor Pin Configuration and Function Descriptions Typical Performance Characteristics Buck Output LDO Output Theory of Operation Buck Section Control Scheme PWM Operation PSM Operation Pulse Skipping Threshold Selected Features Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit Power-Good Pin LDO Section Applications Information Power Sequencing Power-Good Function External Component Selection Selecting the Inductor Output Capacitor Input Capacitor Efficiency Power Switch Conduction Losses Inductor Losses Switching Losses Transition Losses Recommended Buck External Components LDO Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties LDO as a Postregulator to Reduce Buck Output Noise Thermal Considerations PCB Layout Considerations Outline Dimensions Ordering Guide