LM2597M-5.0 National Semiconductor, LM2597M-5.0 Datasheet - Page 7

• Manufacturer Part Number: LM2597M-5.0
• Description: SWITCHING REG 0.5A 5.0V, SMD, 2597
• Manufacturer: National Semiconductor

Specifications of LM2597M-5.0

• Primary Input Voltage: 12V
• No. Of Outputs: 1
• Output Voltage: 5V
• Output Current: 500mA
• Voltage Regulator Case Style: SOIC
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +125°C
• Svhc: No SVHC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Performance Characteristics
V
V
Continuous Mode Switching Waveforms
V
L = 100 µH, C
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.2A/div.
C: Output Ripple Voltage, 20 mV/div.
Load Transient Response for Continuous Mode
V
L = 100 µH, C
A: Output Voltage, 50 mV/div. (AC)
B: 200 mA to 500 mA Load Pulse
IN
BS
IN
IN
and V
= 20V, V
= 20V, V
and Temperature
BS
Horizontal Time Base: 50 µs/div.
OUT
OUT
Horizontal Time Base: 2 µs/div.
Current vs
OUT
OUT
= 5V, I
= 5V, I
= 120 µF, C
= 120 µF, C
LOAD
LOAD
DS012440-17
= 400 mA
= 200 mA to 500 mA
OUT
OUT
ESR = 140 m
ESR = 140 m
Soft-start Response
DS012440-21
DS012440-19
Discontinuous Mode Switching Waveforms
V
L = 33 µH, C
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.2A/div.
C: Output Ripple Voltage, 20 mV/div.
Load Transient Response for Discontinuous Mode
V
L = 33 µH, C
A: Output Voltage, 50 mV/div. (AC)
B: 100 mA to 200 mA Load Pulse
(Continued)
7
IN
IN
= 20V, V
= 20V, V
DS012440-18
Horizontal Time Base: 200 µs/div.
OUT
OUT
Horizontal Time Base: 2 µs/div.
OUT
OUT
= 5V, I
= 5V, I
= 220 µF, C
= 220 µF, C
LOAD
LOAD
Shutdown /Soft-start
Threshold Voltage
= 200 mA
= 100 mA to 200 mA
OUT
OUT
ESR = 60 m
ESR = 60 m
DS012440-20
DS012440-22
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