Datasheet LTC3839 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller with Differential Output Sensing |
| Seiten / Seite | 50 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Transient Response. Load Step. Load … |
| Dateiformat / Größe | PDF / 944 Kb |
| Dokumentensprache | Englisch |
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
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