Datasheet LTM4645 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 25A DC/DC Step-Down µModule Regulator |
| Pages / Page | 34 / 5 — Typical perForMance characTerisTics. CCM, Burst Mode and Pulse-. … |
| File Format / Size | PDF / 707 Kb |
| Document Language | English |
Typical perForMance characTerisTics. CCM, Burst Mode and Pulse-. Efficiency vs Output Current,. Skipping Mode Efficiency
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LTM4645
Typical perForMance characTerisTics CCM, Burst Mode and Pulse- Efficiency vs Output Current, Efficiency vs Output Current, Skipping Mode Efficiency VIN = 5V VIN = 12V VIN = 12V, VOUT = 1.2V, 750kHz
100 100 100 90 95 95 80 90 90 70 60 85 85 50 80 80 40 EFFICIENCY (%) 0.9V EFFICIENCY (%) OUT 500kHz 0.9VOUT 500kHz EFFICIENCY (%) 75 30 1V 75 OUT 600kHz 1VOUT 600kHz 1.2VOUT 700kHz 1.2VOUT 700kHz 20 CCM 70 1.5VOUT 800kHz 70 1.5VOUT 800kHz 10 Burst Mode OPERATION 1.8VOUT 900kHz 1.8VOUT 900kHz PULSE-SKIPPING MODE 65 65 0 0 5 10 15 20 25 0 5 10 15 20 25 0.01 0.1 1 10 100 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 4645 G03 4645 G01 4645 G02
0.9V Output Load Step Transient 1V Output Load Step Transient 1.2V Output Load Step Transient Response Response Response
VOUT VOUT VOUT 50mV/DIV 50mV/DIV 50mV/DIV AC- AC- AC- COUPLED COUPLED COUPLED LOAD STEP LOAD STEP LOAD STEP 5A/DIV 5A/DIV 5A/DIV 50µs/DIV 4645 G04 50µs/DIV 4645 G05 50µs/DIV 4645 G06 VIN = 12V, VOUT = 0.9V, FS = 500kHz VIN = 12V, VOUT = 1V, FS = 600kHz VIN = 12V, VOUT = 1.2V, FS = 700kHz COUT = 6 × 100µF CERAMIC COUT = 6 × 100µF CERAMIC COUT = 6 × 100µF CERAMIC CFF = 33pF CFF = 33pF CFF = 33pF 0A TO 6.25A LOAD STEP, 10A/µs 0A TO 6.25A LOAD STEP, 10A/µs 0A TO 6.25A LOAD STEP, 10A/µs
1.5V Output Load Step Transient 1.8V Output Load Step Transient Response Response
VOUT VOUT 50mV/DIV 50mV/DIV AC- AC- COUPLED COUPLED LOAD STEP LOAD STEP 5A/DIV 5A/DIV 50µs/DIV 4645 G07 50µs/DIV 4645 G08 VIN = 12V, VOUT = 1.5V, FS = 800kHz VIN = 12V, VOUT = 1.8V, FS = 900kHz COUT = 6 × 100µF CERAMIC COUT = 6 × 100µF CERAMIC CFF = 33pF CFF = 33pF 0A TO 6.25A LOAD STEP, 10A/µs 0A TO 6.25A LOAD STEP, 10A/µs 4645f For more information www.linear.com/LTM4645 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Package Photo Design Resources Related Parts
Typical perForMance characTerisTics CCM, Burst Mode and Pulse- Efficiency vs Output Current, Efficiency vs Output Current, Skipping Mode Efficiency VIN = 5V VIN = 12V VIN = 12V, VOUT = 1.2V, 750kHz
100 100 100 90 95 95 80 90 90 70 60 85 85 50 80 80 40 EFFICIENCY (%) 0.9V EFFICIENCY (%) OUT 500kHz 0.9VOUT 500kHz EFFICIENCY (%) 75 30 1V 75 OUT 600kHz 1VOUT 600kHz 1.2VOUT 700kHz 1.2VOUT 700kHz 20 CCM 70 1.5VOUT 800kHz 70 1.5VOUT 800kHz 10 Burst Mode OPERATION 1.8VOUT 900kHz 1.8VOUT 900kHz PULSE-SKIPPING MODE 65 65 0 0 5 10 15 20 25 0 5 10 15 20 25 0.01 0.1 1 10 100 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 4645 G03 4645 G01 4645 G02
0.9V Output Load Step Transient 1V Output Load Step Transient 1.2V Output Load Step Transient Response Response Response
VOUT VOUT VOUT 50mV/DIV 50mV/DIV 50mV/DIV AC- AC- AC- COUPLED COUPLED COUPLED LOAD STEP LOAD STEP LOAD STEP 5A/DIV 5A/DIV 5A/DIV 50µs/DIV 4645 G04 50µs/DIV 4645 G05 50µs/DIV 4645 G06 VIN = 12V, VOUT = 0.9V, FS = 500kHz VIN = 12V, VOUT = 1V, FS = 600kHz VIN = 12V, VOUT = 1.2V, FS = 700kHz COUT = 6 × 100µF CERAMIC COUT = 6 × 100µF CERAMIC COUT = 6 × 100µF CERAMIC CFF = 33pF CFF = 33pF CFF = 33pF 0A TO 6.25A LOAD STEP, 10A/µs 0A TO 6.25A LOAD STEP, 10A/µs 0A TO 6.25A LOAD STEP, 10A/µs
1.5V Output Load Step Transient 1.8V Output Load Step Transient Response Response
VOUT VOUT 50mV/DIV 50mV/DIV AC- AC- COUPLED COUPLED LOAD STEP LOAD STEP 5A/DIV 5A/DIV 50µs/DIV 4645 G07 50µs/DIV 4645 G08 VIN = 12V, VOUT = 1.5V, FS = 800kHz VIN = 12V, VOUT = 1.8V, FS = 900kHz COUT = 6 × 100µF CERAMIC COUT = 6 × 100µF CERAMIC CFF = 33pF CFF = 33pF 0A TO 6.25A LOAD STEP, 10A/µs 0A TO 6.25A LOAD STEP, 10A/µs 4645f For more information www.linear.com/LTM4645 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Package Photo Design Resources Related Parts
