LM2575-12WU TR Micrel Inc, LM2575-12WU TR Datasheet - Page 6
![1A Step-Down SMPS Regulator ( )](/photos/7/59/75999/576-to-263-5_sml.jpg)
LM2575-12WU TR
Manufacturer Part Number
LM2575-12WU TR
Description
1A Step-Down SMPS Regulator ( )
Manufacturer
Micrel Inc
Type
Step-Down (Buck)r
Datasheet
1.LM2575-5.0WT.pdf
(12 pages)
Specifications of LM2575-12WU TR
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
12V
Current - Output
1A
Frequency - Switching
42kHz ~ 63kHz
Voltage - Input
4 ~ 40 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
D²Pak, TO-263 (5 leads + tab)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM2575-12WUTR
LM2575-12WUTR
LM2575-12WUTR
Test Circuits and Layout Guidelines
As in any switching regulator, layout is very important.
Rapidly switching currents associated with wiring
inductance generate voltage transient switch can cause
problems. For minimal stray inductance and ground
Micrel, Inc.
May 2009
U N R E G U L A TE D
U N R E G U L A TE D
DC INPUT
DC INPUT
Not e: Pin numbers are for TO-220 Package
7V - 40V
7V - 40V
+
+
100µF
100µF
C
C
IN
IN
+V
+V
IN
IN
1
G ND
1
G ND
LM2575-5.0
LM2575
3
3
ON/OFF
ON/OFF
5
5
4
2
4
2
F E E D B A C K
F E E D B A C K
OU TPU T
OU TPU T
D1
MBR360
D1
MBR360
330µH
330µH
L1
L1
Figure 1.
+
+
C
470µF
C
220µF
OUT
OUT
6
loops, the length of the leads indicated by heavy lines
should be kept as short as possible. Single-point
grounding (as indicated) or ground plane construction
should be used for best results.
V
5.00V
OUT
L
O
A
D
R 2
R 1
V
5.00V
OUT
L
O
A
D
C
C
D1 — Schottky, MBR360
L1 — 330µH, 415-0926 (AIE)
R1 — 1k, 0.01%
R2 — 3.065k, 0.01%
5-pin TO-220 socket—2936 (Loranger Mfg. Co.)
4-pin TO-3 socket—8112-AG7 (Augat Inc.)
C
C
D1 — Schottky, MBR360
L1 — 330µH, 415-0926 (AIE)
5-pin TO-220 socket — 2936 (Loranger Mfg. Co.)
4-pin TO-3 socket — 8112-AG7 (Augat Inc.)
IN
OUT
IN
OUT
— 100µF, 75V Aluminum Electrolytic
— 100µF, 75V Aluminum Electrolytic
— 470µF, 15V Aluminum Electrolytic
— 330µF, 15V Aluminum Electrolytic
M9999-051209-B
LM2575