LM2574N-5.0/NOPB National Semiconductor, LM2574N-5.0/NOPB Datasheet - Page 8

• Manufacturer Part Number: LM2574N-5.0/NOPB
• Description: IC REG SIMPLE SWITCHER 8-DIP
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2574N-5.0/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5V
• Current - Output: 500mA
• Frequency - Switching: 52kHz
• Voltage - Input: 4 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Power - Output: 750mW
• Current, Input Bias: 50 nA
• Current, Output: 0.5 A
• Current, Supply: 5 mA
• Frequency, Oscillator: 52 kHz
• Package Type: MDIP-8
• Regulator Type: Buck (Step-Down)
• Temperature, Operating, Range: -40 to +125 °C
• Voltage, Input: 40 V
• Voltage, Output: 5 V
• Primary Input Voltage: 12V
• No. Of Outputs: 1
• Output Voltage: 5V
• Output Current: 500mA
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 1 - Unlimited
• Input Voltage Primary Max: 40V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM2574N-5.0; *LM2574N-5.0/NOPB; LM2574N-5.0

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Typical Performance Characteristics
Feedback
Pin Current
Continuous Mode Switching Waveforms
V
Notes:
A: Output Pin Voltage, 10V/div
B: Inductor Current, 0.2 A/div
C: Output Ripple Voltage, 20 mV/div,
AC-Coupled
Horizontal Time Base: 5 µs/div
500 mA Load Transient Response for Continuous
Mode Operation. L = 330 µH, C
Notes:
A: Output Voltage, 50 mV/div.
AC Coupled
B: 100 mA to 500 mA Load Pulse
Horizontal Time Base: 200 µs/div
OUT
= 5V, 500 mA Load Current, L = 330 µH
OUT
= 300 µF
DS011394-39
DS011394-6
DS011394-8
(Circuit of Figure 2 ) (Continued)
Junction to Ambient
Thermal Resistance
Discontinuous Mode Switching Waveforms
V
Notes:
A: Output Pin Voltage, 10V/div
B: Inductor Current, 0.2 A/div
C: Output Ripple Voltage, 20 mV/div,
AC-Coupled
Horizontal Time Base: 5 µs/div
250 mA Load Transient Response for Discontinuous
Mode Operation. L = 68 µH, C
Notes:
A: Output Voltage, 50 mV/div.
AC Coupled
B: 50 mA to 250 mA Load Pulse
Horizontal Time Base: 200 µs/div
8
OUT
= 5V, 100 mA Load Current, L = 100 µH
OUT
= 470 µF
DS011394-40
DS011394-7
DS011394-9