Datasheet LTC3839 (Analog Devices) - 5

制造商Analog Devices
描述Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller with Differential Output Sensing
页数 / 页50 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Transient Response. Load Step. Load …
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TYPICAL PERFORMANCE CHARACTERISTICS. Transient Response. Load Step. Load Release. (Forced Continuous Mode). (Discontinuous Mode)

TYPICAL PERFORMANCE CHARACTERISTICS Transient Response Load Step Load Release (Forced Continuous Mode) (Discontinuous Mode)

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LTC3839
TYPICAL PERFORMANCE CHARACTERISTICS Transient Response Load Step Load Release (Forced Continuous Mode) (Forced Continuous Mode) (Forced Continuous Mode)
I I LOAD LOAD ILOAD 20A/DIV 20A/DIV 20A/DIV VOUT VOUT 50mV/DIV 50mV/DIV VOUT 50mV/DIV IL1 I 10A/DIV L1 IL1 10A/DIV 10A/DIV IL2 I 10A/DIV L2 IL2 10A/DIV 10A/DIV 50µs/DIV 3839 G01 5µs/DIV 3839 G02 5µs/DIV 3839 G03 LOAD TRANSIENT = 0A TO 30A LOAD STEP = 0A TO 30A LOAD RELEASE = 30A TO 0A VIN = 12V VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.2V VOUT = 1.2V FIGURE 17 CIRCUIT FIGURE 17 CIRCUIT FIGURE 17 CIRCUIT
Transient Response Load Step Load Release (Discontinuous Mode) (Discontinuous Mode) (Discontinuous Mode)
ILOAD ILOAD ILOAD 20A/DIV 20A/DIV 20A/DIV VOUT V V 50mV/DIV OUT OUT 50mV/DIV 50mV/DIV IL1 IL1 IL1 10A/DIV 10A/DIV 10A/DIV IL2 IL2 IL2 10A/DIV 10A/DIV 10A/DIV 50µs/DIV 3839 G04 5µs/DIV 3839 G05 5µs/DIV 3839 G06 LOAD TRANSIENT = 750mA TO 30A LOAD STEP = 750mA TO 30A LOAD RELEASE = 30A TO 750mA VIN = 12V VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.2V VOUT = 1.2V FIGURE 17 CIRCUIT FIGURE 17 CIRCUIT FIGURE 17 CIRCUIT
Load Release with Detect Transient (DTR) Load Release with Detect Transient (DTR) Feature Enabled Feature Disabled
SW1 SW1 5V/DIV 5V/DIV SW2 SW2 5V/DIV 5V/DIV ILOAD ILOAD 20A/DIV 20A/DIV VOUT VOUT 20mV/DIV 20mV/DIV AC-COUPLED AC-COUPLED 2µs/DIV 3839 G07 2µs/DIV 3839 G08 BACK PAGE APPLICATION CIRCUIT BACK PAGE APPLICATION CIRCUIT, LOAD RELEASE = 30A TO 10A MODIFIED: RITH = 16.5k (≈36.5k/30.1k) VIN = 5V LOAD RELEASE = 30A TO 10A VOUT = 0.6V VIN = 5V SHADING OBTAINED WITH INFINITE PERSISTENCE ON VOUT = 0.6V OSCILLOSCOPE WAVEFORMS 3839fa 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Functional Diagram Operation Typical Applications Typical Application Related Parts