LM2575-12BN Micrel Inc, LM2575-12BN Datasheet - Page 6

• Manufacturer Part Number: LM2575-12BN
• Description: IC REG BUCK 1A 12V 16-DIP
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of LM2575-12BN

• 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: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

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