LM2594M-12/NOPB National Semiconductor, LM2594M-12/NOPB Datasheet - Page 11
![IC REG SIMPLE SWITCHER 8-SOIC](/photos/6/56/65640/pkg_m08a_sml.jpg)
LM2594M-12/NOPB
Manufacturer Part Number
LM2594M-12/NOPB
Description
IC REG SIMPLE SWITCHER 8-SOIC
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM2594MX-5.0NOPB.pdf
(28 pages)
Specifications of LM2594M-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)
Primary Input Voltage
25V
No. Of Outputs
1
Output Voltage
12V
Output Current
500mA
No. Of Pins
8
Operating Temperature Range
-40°C To +125°C
Filter Terminals
SMD
Input Voltage Primary Max
40V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM2594M-12
LM2594M-12
LM2594M-12
LM2594/LM2594HV Series Buck Regulator Design Procedure (Fixed
Output)
LM2594/LM2594HV Series Buck Regulator Design Procedure (Adjustable
Output)
Given:
V
V
I
F = Switching Frequency (Fixed at a nominal 150 kHz).
LOAD
OUT
IN
Voltage
Output
PROCEDURE (Adjustable Output Voltage Version)
(max) = Maximum Input Voltage
(V)
3.3
12
5
(max) = Maximum Load Current
= Regulated Output Voltage
Conditions
Current
(Continued)
Load
(A)
0.5
0.2
0.5
0.2
0.5
0.2
FIGURE 2. LM2594/LM2594HV 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
Given:
V
V
I
F = Switching Frequency (Fixed at a nominal 150 kHz).
LOAD
HFQ Series
Panasonic
OUT
IN
(max) = 28V
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
EXAMPLE (Adjustable Output Voltage Version)
(max) = 0.5A
= 20V
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
100/16
100/16
100/16
100/16
100/16
100/16
100/16
Series
(µF/V)
Surface Mount
595D Series
Sprague
100/6.3
100/6.3
100/6.3
100/6.3
100/6.3
100/6.3
100/6.3
www.national.com
(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