LM2597M-12/NOPB National Semiconductor, LM2597M-12/NOPB Datasheet - Page 11

• Manufacturer Part Number: LM2597M-12/NOPB
• Description: IC REG SIMPLE SWITCHER 8-SOIC
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2597M-12/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 12V
• 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)
• Supply Voltage Range: 4.5V To 40V
• Termination Type: SMD
• Driver Case Style: NSOIC
• No. Of Pins: 8
• Output Voltage Min: 1.23V
• Voltage Regulator Type: Buck Switching
• Rohs Compliant: Yes
• Filter Terminals: SMD
• Input Voltage Primary Max: 40V
• Leaded Process Compatible: Yes
• No. Of Outputs: 1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM2597M-12; *LM2597M-12/NOPB; LM2597M-12

LM2597/LM2597HV Series Buck Regulator Design Procedure (Fixed
Output)
Voltage
Output
(V)
3.3
12
5
Conditions
Current
(Continued)
Load
(A)
0.5
0.2
0.5
0.2
0.5
0.2
FIGURE 1. LM2597/LM2597HV Fixed Voltage Quick Design Component Selection Table
Max Input
Voltage
(V)
10
40
10
40
10
15
40
20
40
15
18
30
40
15
20
40
5
7
6
8
9
Inductance
(µH)
100
150
220
100
150
150
220
330
150
220
330
100
220
330
33
47
68
68
47
68
68
Inductor
Inductor
L14
L13
L21
L20
L10
L13
L21
L20
L19
L10
L21
L19
L27
L26
L11
L17
( # )
L4
L9
L9
L8
L9
11
HFQ Series
Panasonic
220/16
120/25
120/25
120/35
120/25
120/16
120/16
180/16
180/16
120/25
120/25
120/16
120/16
(µF/V)
82/16
82/25
82/25
82/25
82/25
82/25
82/25
82/25
Through Hole
PL Series
Nichicon
220/16
120/25
120/25
120/35
120/25
120/16
120/16
180/16
180/16
120/25
120/25
120/16
120/16
(µF/V)
82/16
82/25
82/25
82/25
82/25
82/25
82/25
82/25
Output Capacitor
AVX TPS
100/16
100/16
100/16
100/16
100/16
100/16
100/16
100/16
100/16
100/16
100/16
100/16
100/16
100/16
Series
100/16
100/16
100/16
100/16
100/16
100/16
100/16
(µF/V)
Surface Mount
595D Series
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Sprague
100/6.3
100/6.3
100/6.3
100/6.3
100/6.3
100/6.3
100/6.3
(µF/V)
33/25
33/25
33/25
33/25
33/25
33/25
33/25
15/25
15/25
15/25
15/25
15/25
15/25
15/25