LM2574M-3.3 National Semiconductor, LM2574M-3.3 Datasheet - Page 8
![DC/DC Converter IC](/photos/18/97/189794/3833494_sml.gif)
LM2574M-3.3
Manufacturer Part Number
LM2574M-3.3
Description
DC/DC Converter IC
Manufacturer
National Semiconductor
Datasheet
1.LM2574M-3.3.pdf
(24 pages)
Specifications of LM2574M-3.3
Input Voltage
40V
Output Voltage
3.3V
No. Of Pins
14
Mounting Type
Surface Mount
Output Current Max
0.5A
Peak Reflow Compatible (260 C)
No
Supply Voltage Max
40V
Leaded Process Compatible
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2574M-3.3
Manufacturer:
NS
Quantity:
950
Company:
Part Number:
LM2574M-3.3/NOPB
Manufacturer:
National Semiconductor
Quantity:
1 784
Company:
Part Number:
LM2574M-3.3/NOPB
Manufacturer:
TI/NS
Quantity:
340
www.national.com
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
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(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
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