LM2597M-5.0/NOPB National Semiconductor, LM2597M-5.0/NOPB Datasheet - Page 19

• Manufacturer Part Number: LM2597M-5.0/NOPB
• Description: IC REG SIMPLE SWITCHER 8-SOIC
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2597M-5.0/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5V
• Current - Output: 500mA
• Frequency - Switching: 150kHz
• Voltage - Input: 4.5 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• 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
• Supply Voltage Range: 4.5V To 40V
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Input Voltage Primary Max: 40V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM2597M-5.0; *LM2597M-5.0/NOPB; LM2597M-5.0

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
www.national.com