Datasheet LTM4608A (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Low VIN, 8A DC/DC μModule Regulator with Tracking, Margining, and Frequency Synchronization |
| Pages / Page | 28 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Load Transient Response. Start-Up. … |
| File Format / Size | PDF / 714 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Load Transient Response. Start-Up. VFB vs Temperature. Load Regulation vs Current
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Text Version of Document
LTM4608A
TYPICAL PERFORMANCE CHARACTERISTICS Load Transient Response Load Transient Response Load Transient Response
ILOAD ILOAD ILOAD 2A/DIV 2A/DIV 2A/DIV VOUT VOUT V 20mV/DIV OUT 20mV/DIV 20mV/DIV AC COUPLED AC COUPLED AC COUPLED V 4608A G10 4608A G11 4608A G12 IN = 5V 20µs/DIV VIN = 5V 20µs/DIV VIN = 5V 20µs/DIV VOUT = 1.8V, RFB = 4.87k VOUT = 1.5V, RFB = 6.65k VOUT = 1.2V, RFB = 10k 2.5A/µs STEP 2.5A/µs STEP 2.5A/µs STEP COUT = 100µF X5R COUT = 100µF X5R COUT = 2 × 100µF C1 = NONE, C3 = NONE FROM FIGURE 18 C1 = NONE, C3 = NONE FROM FIGURE 18 C1 = 100pF, C3 = NONE FROM FIGURE 18
Start-Up VFB vs Temperature Load Regulation vs Current
602 0 600 V –0.1 OUT 0.5V/DIV VIN = 5.5V 598 –0.2 VIN = 3.3V VIN 2V/DIV (mV) 596 –0.3 V FB VIN = 2.7V 594 –0.4 LOAD REGULATION (%) V 4608A G13 IN = 5V 50µs/DIV FC MODE 592 V –0.5 OUT = 1.5V VIN = 3.3V COUT = 100µF NO LOAD AND 8A LOAD VOUT = 1.5V (DEFAULT 100µs SOFT-START) 590 –0.6 –55 –25 5 35 65 95 125 0 2 4 6 8 TEMPERATURE (°C) LOAD CURRENT (A) 4608A G14 4608A G15
Short-Circuit Protection Short-Circuit Protection 2.5V Output Current (2.5V Short, No Load) (2.5V Short, 4A Load)
3.0 VIN 5V/DIV 2.5 2V/DIV VIN 5V/DIV 2V/DIV V VOUT 2.0 OUT IOUT LOAD 5A/DIV 1.5 5A/DIV IOUT 1.0 OUTPUT VOLTAGE (V) VIN = 5V 50µs/DIV 4608A G17 0.5 VIN = 5V 50µs/DIV 4608A G18 VOUT = 2.5V VOUT = 2.5V 0 0 5 10 15 20 OUTPUT CURRENT (A) 4608A G16 4608afe 6 For more information www.linear.com/LTM4608A Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Order Information Typical Performance Characteristics Pin Functions Simplified Block Diagram Operation Applications Information Typical Applications Package Description Package Photo Revision History Package Description Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Load Transient Response Load Transient Response Load Transient Response
ILOAD ILOAD ILOAD 2A/DIV 2A/DIV 2A/DIV VOUT VOUT V 20mV/DIV OUT 20mV/DIV 20mV/DIV AC COUPLED AC COUPLED AC COUPLED V 4608A G10 4608A G11 4608A G12 IN = 5V 20µs/DIV VIN = 5V 20µs/DIV VIN = 5V 20µs/DIV VOUT = 1.8V, RFB = 4.87k VOUT = 1.5V, RFB = 6.65k VOUT = 1.2V, RFB = 10k 2.5A/µs STEP 2.5A/µs STEP 2.5A/µs STEP COUT = 100µF X5R COUT = 100µF X5R COUT = 2 × 100µF C1 = NONE, C3 = NONE FROM FIGURE 18 C1 = NONE, C3 = NONE FROM FIGURE 18 C1 = 100pF, C3 = NONE FROM FIGURE 18
Start-Up VFB vs Temperature Load Regulation vs Current
602 0 600 V –0.1 OUT 0.5V/DIV VIN = 5.5V 598 –0.2 VIN = 3.3V VIN 2V/DIV (mV) 596 –0.3 V FB VIN = 2.7V 594 –0.4 LOAD REGULATION (%) V 4608A G13 IN = 5V 50µs/DIV FC MODE 592 V –0.5 OUT = 1.5V VIN = 3.3V COUT = 100µF NO LOAD AND 8A LOAD VOUT = 1.5V (DEFAULT 100µs SOFT-START) 590 –0.6 –55 –25 5 35 65 95 125 0 2 4 6 8 TEMPERATURE (°C) LOAD CURRENT (A) 4608A G14 4608A G15
Short-Circuit Protection Short-Circuit Protection 2.5V Output Current (2.5V Short, No Load) (2.5V Short, 4A Load)
3.0 VIN 5V/DIV 2.5 2V/DIV VIN 5V/DIV 2V/DIV V VOUT 2.0 OUT IOUT LOAD 5A/DIV 1.5 5A/DIV IOUT 1.0 OUTPUT VOLTAGE (V) VIN = 5V 50µs/DIV 4608A G17 0.5 VIN = 5V 50µs/DIV 4608A G18 VOUT = 2.5V VOUT = 2.5V 0 0 5 10 15 20 OUTPUT CURRENT (A) 4608A G16 4608afe 6 For more information www.linear.com/LTM4608A Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Order Information Typical Performance Characteristics Pin Functions Simplified Block Diagram Operation Applications Information Typical Applications Package Description Package Photo Revision History Package Description Related Parts
