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LTM4644 Datasheet(PDF) 4 Page - Linear Technology |
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LTM4644 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 32 page  LTM4644 4 4644fb For more information www.linear.com/LTM4644 1.0V Output Transient Response 1.5V Output Transient Response 2.5V Output Transient Response Efficiency vs Load Current from 5VIN (One Channel Operating) Efficiency vs Load Current from 12VIN (One Channel Operating) DCM Mode Efficiency from 1.5VOUT ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTM4644 is tested under pulsed load conditions such that TJ ≈ TA. The LTM4644E is guaranteed to meet performance specifications over the 0°C to 125°C internal operating temperature range. Specifications over the full –40°C to 125°C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM4644I is guaranteed to meet specifications over the full –40°C to 125°C internal operating temperature range. Note that the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors. Note 3: 100% tested at wafer level. Note 4: See output current derating curves for different VIN, VOUT and TA. Note 5: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125°C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. TYPICAL PERFORMANCE CHARACTERISTICS LOAD CURRENT (A) 0 70 75 85 90 95 100 1 4644 G01 80 4 2 3 3.3VOUT 2.5VOUT 1.8VOUT 1.5VOUT 1.2VOUT LOAD CURRENT (A) 0 65 70 80 85 90 95 1 4644 G02 75 4 2 3 5VOUT 3.3VOUT 2.5VOUT 1.8VOUT 1.5VOUT 1.2VOUT LOAD CURRENT (A) 0.001 0 20 30 40 100 0.01 4644 G03 10 50 60 70 80 90 10 0.1 1 5VIN 12VIN 20µs/DIV LOAD STEP 1A/DIV 4644 G04 VOUT 50mV/DIV AC-COUPLED VIN = 12V, VOUT = 1V, IOUT = 3A TO 4A, 1A/µs CFF = 10pF OUTPUT CAPACITOR = 1 • 47µF CERAMIC (Per Channel) 20µs/DIV LOAD STEP 1A/DIV 4644 G05 VOUT 50mV/DIV AC-COUPLED VIN = 12V, VOUT = 1.5V, IOUT = 3A TO 4A, 1A/µs CFF = 10pF OUTPUT CAPACITOR = 1 • 47µF CERAMIC 20µs/DIV LOAD STEP 1A/DIV 4644 G06 VOUT 50mV/DIV AC-COUPLED VIN = 12V, VOUT = 2.5V, IOUT = 3A TO 4A, 1A/µs CFF = 10pF OUTPUT CAPACITOR = 1 • 47µF CERAMIC |
Similar Part No. - LTM4644_15 |
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Similar Description - LTM4644_15 |
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