Datasheet LTC3838-2 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Dual, Fast, Accurate Step-Down DC/DC Controller with External Reference Voltage and Dual Differential Output Sensing |
| Pages / Page | 56 / 6 — Typical perForMance characTerisTics. Transient Response. Load Step. Load … |
| File Format / Size | PDF / 968 Kb |
| Document Language | English |
Typical perForMance characTerisTics. Transient Response. Load Step. Load Release. (Forced Continuous Mode). (Discontinuous Mode)
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Text Version of Document
LTC3838-2
Typical perForMance characTerisTics Transient Response Load Step Load Release (Forced Continuous Mode) (Forced Continuous Mode) (Forced Continuous Mode)
ILOAD ILOAD I 10A/DIV 10A/DIV LOAD 10A/DIV VOUT VOUT VOUT 50mV/DIV 50mV/DIV 50mV/DIV AC-COUPLED AC-COUPLED AC-COUPLED IL IL 10A/DIV 10A/DIV IL 10A/DIV 50µs/DIV 38382 G01 5µs/DIV 38382 G02 5µs/DIV 38382 G03 LOAD TRANSIENT = 0A TO 15A TO 0A LOAD STEP = 0A TO 15A LOAD RELEASE = 15A TO 0A VIN = 12V VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.2V VOUT = 1.2V FIGURE 17 CIRCUIT, CHANNEL 1 FIGURE 17 CIRCUIT, CHANNEL 1 FIGURE 17 CIRCUIT, CHANNEL 1
Transient Response Load Step Load Release (Discontinuous Mode) (Discontinuous Mode) (Discontinuous Mode)
ILOAD ILOAD ILOAD 10A/DIV 10A/DIV 10A/DIV VOUT VOUT VOUT 50mV/DIV 50mV/DIV 50mV/DIV AC-COUPLED AC-COUPLED AC-COUPLED IL IL I 10A/DIV 10A/DIV L 10A/DIV 50µs/DIV 38382 G04 5µs/DIV 38382 G05 5µs/DIV 38382 G06 LOAD TRANSIENT = 500mA TO 15A TO 500mA LOAD STEP = 500mA TO 15A LOAD RELEASE = 15A TO 500mA VIN = 12V VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.2V VOUT = 1.2V FIGURE 17 CIRCUIT, CHANNEL 1 FIGURE 17 CIRCUIT, CHANNEL 1 FIGURE 17 CIRCUIT, CHANNEL 1
Load Release with Detect Transient (DTR) Load Release with Detect Transient (DTR) Feature Enabled Feature Disabled
SW SW 3V/DIV 3V/DIV V V OUT OUT 50mV/DIV 50mV/DIV AC-COUPLED AC-COUPLED ITH ITH 1V/DIV 1V/DIV IL IL 10A/DIV 10A/DIV 5µs/DIV 38382 G07 5µs/DIV 38382 G08 LOAD RELEASE = 15A TO 5A LOAD RELEASE = 15A TO 5A VIN = 5V VIN = 5V VOUT = 0.6V VOUT = 0.6V FIGURE 17 CIRCUIT, CHANNEL 1 MODIFIED: FIGURE 17 CIRCUIT, CHANNEL 1 MODIFIED: RFB2 = 0Ω, CITH1 = 120pF, CITH2 = 0pF, RFB2 = 0Ω, CITH1 = 120pF, CITH2 = 0pF, FROM DTR1 PIN: RITH1 = 46.4k TO SGND, RITH2 = 42.2k TO INTVCC RITH1/2 = 46.4k TO SGND//42.2k TO INTVCC, SHADING OBTAINED WITH INFINITE PERSISTENCE ON CONNECTION FROM RITH1/2 AND CITH1 TO DTR1 PIN REMOVED. OSCILLOSCOPE WAVEFORMS DTR1 PIN TIED TO INTVCC 38382fa 6 For more information www.linear.com/3838-2 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
Typical perForMance characTerisTics Transient Response Load Step Load Release (Forced Continuous Mode) (Forced Continuous Mode) (Forced Continuous Mode)
ILOAD ILOAD I 10A/DIV 10A/DIV LOAD 10A/DIV VOUT VOUT VOUT 50mV/DIV 50mV/DIV 50mV/DIV AC-COUPLED AC-COUPLED AC-COUPLED IL IL 10A/DIV 10A/DIV IL 10A/DIV 50µs/DIV 38382 G01 5µs/DIV 38382 G02 5µs/DIV 38382 G03 LOAD TRANSIENT = 0A TO 15A TO 0A LOAD STEP = 0A TO 15A LOAD RELEASE = 15A TO 0A VIN = 12V VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.2V VOUT = 1.2V FIGURE 17 CIRCUIT, CHANNEL 1 FIGURE 17 CIRCUIT, CHANNEL 1 FIGURE 17 CIRCUIT, CHANNEL 1
Transient Response Load Step Load Release (Discontinuous Mode) (Discontinuous Mode) (Discontinuous Mode)
ILOAD ILOAD ILOAD 10A/DIV 10A/DIV 10A/DIV VOUT VOUT VOUT 50mV/DIV 50mV/DIV 50mV/DIV AC-COUPLED AC-COUPLED AC-COUPLED IL IL I 10A/DIV 10A/DIV L 10A/DIV 50µs/DIV 38382 G04 5µs/DIV 38382 G05 5µs/DIV 38382 G06 LOAD TRANSIENT = 500mA TO 15A TO 500mA LOAD STEP = 500mA TO 15A LOAD RELEASE = 15A TO 500mA VIN = 12V VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.2V VOUT = 1.2V FIGURE 17 CIRCUIT, CHANNEL 1 FIGURE 17 CIRCUIT, CHANNEL 1 FIGURE 17 CIRCUIT, CHANNEL 1
Load Release with Detect Transient (DTR) Load Release with Detect Transient (DTR) Feature Enabled Feature Disabled
SW SW 3V/DIV 3V/DIV V V OUT OUT 50mV/DIV 50mV/DIV AC-COUPLED AC-COUPLED ITH ITH 1V/DIV 1V/DIV IL IL 10A/DIV 10A/DIV 5µs/DIV 38382 G07 5µs/DIV 38382 G08 LOAD RELEASE = 15A TO 5A LOAD RELEASE = 15A TO 5A VIN = 5V VIN = 5V VOUT = 0.6V VOUT = 0.6V FIGURE 17 CIRCUIT, CHANNEL 1 MODIFIED: FIGURE 17 CIRCUIT, CHANNEL 1 MODIFIED: RFB2 = 0Ω, CITH1 = 120pF, CITH2 = 0pF, RFB2 = 0Ω, CITH1 = 120pF, CITH2 = 0pF, FROM DTR1 PIN: RITH1 = 46.4k TO SGND, RITH2 = 42.2k TO INTVCC RITH1/2 = 46.4k TO SGND//42.2k TO INTVCC, SHADING OBTAINED WITH INFINITE PERSISTENCE ON CONNECTION FROM RITH1/2 AND CITH1 TO DTR1 PIN REMOVED. OSCILLOSCOPE WAVEFORMS DTR1 PIN TIED TO INTVCC 38382fa 6 For more information www.linear.com/3838-2 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
