LM2597M-3.3 National Semiconductor, LM2597M-3.3 Datasheet - Page 19

• Manufacturer Part Number: LM2597M-3.3
• Description: IC, STEP-DOWN REGULATOR, 8-SOIC
• Manufacturer: National Semiconductor

Specifications of LM2597M-3.3

• Primary Input Voltage: 12V
• No. Of Outputs: 1
• Output Voltage: 3.3V
• Output Current: 500mA
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +125°C
• Supply Voltage Range: 4.5V To 40V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Typical Circuit and Layout Guidelines
Component Values shown are for V
C
C
D1
L1
Typical Values
C
C
R
*Use Bias Supply pin for 5V and 12V Versions
Select R
Component Values shown are for V
V
C
C
D1
L1
R
R
C
Typical Values
C
C
R
*For output voltages between 4V and 20V
OUT
IN
OUT
SS
DELAY
Pull Up
IN
OUT
1
2
FF
SS
DELAY
PULL UP
— 3.3 nF, See Application Information Section
— 0.1 µF
— 150 µH, L19
— 1 k , 1%
— 7.15k, 1%
= 10V, I
— 1A, 30V Schottky Rectifier, 1N5818
— 120 µF, 25V Aluminum Electrolytic, Nichicon “PL Series”
— 120 µF, 25V Aluminum Electrolytic, Nichicon “PL Series”
— 47 µF, 50V, Aluminum Electrolytic Nichicon “PL Series”
— 68 µF, 35V, Aluminum Electrolytic Nichicon “PL Series”
— 0.1 µF
— 100 µH, L20
— 1A, 30V Schottky Rectifier, 1N5818
— 0.1 µF
1
— 0.1 µF
— 4.7k
to be approximately 1 k , use a 1% resistor for best stability.
— 4.7k
Adjustable Output Voltage Versions
LOAD
= 500 mA.
IN
IN
= 15V, V
= 20V,
OUT
FIGURE 12. Typical Circuits and Layout Guides
= 5V, I
LOAD
Fixed Output Voltage Versions
= 500 mA.
19
DS012440-56
DS012440-27
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