LM2675MX-5 Datasheet, PDF (9/30 Pages) Texas Instruments – LM2675 SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator

LM2675
www.ti.com
SNVS129E – MAY 2004 – REVISED JUNE 2005
Typical Performance Characteristics
(Circuit of Figure 22)
Continuous Mode Switching Waveforms
V_IN = 20V, V_OUT = 5V, I_LOAD = 1A
L = 47 μH, C_OUT = 68 μF, C_OUTESR = 50 mΩ
Discontinuous Mode Switching Waveforms
V_IN = 20V, V_OUT = 5V, I_LOAD = 300 mA
L = 15 μH, C_OUT = 68 μF (2×), C_OUTESR = 25 mΩ
A: V_SW Pin Voltage, 10 V/div.
B: Inductor Current, 0.5 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Figure 18. Horizontal Time Base: 1 μs/div
Load Transient Response for Continuous Mode
V_IN = 20V, V_OUT = 5V, I_LOAD = 1A
L = 47 μH, C_OUT = 68 μF, C_OUTESR = 50 mΩ
A: V_SW Pin Voltage, 10 V/div.
B: Inductor Current, 0.5 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Figure 19. Horizontal Time Base: 1 μs/div
Load Transient Response for Discontinuous Mode
V_IN = 20V, V_OUT = 5V,
L = 47 μH, C_OUT = 68 μF, C_OUTESR = 50 mΩ
A: Output Voltage, 100 mV/div, AC-Coupled.
B: Load Current: 200 mA to 1A Load Pulse
Figure 20. Horizontal Time Base: 50 μs/div
A: Output Voltage, 100 mV/div, AC-Coupled.
B: Load Current: 100 mA to 400 mA Load Pulse
Figure 21. Horizontal Time Base: 200 μs/div
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