LM2574-12 Motorola Inc, LM2574-12 Datasheet - Page 2

• Manufacturer Part Number: LM2574-12
• Description: EASY SWITCHERE 0.5 A STEP-DOWN VOLTAGE REGULATOR
• Manufacturer: Motorola Inc

ABSOLUTE MAXIMUM RATINGS
damage to the device may occur).
NOTE: ESD data available upon request.
Unregulated
2
Maximum Supply Voltage
ON/OFF Pin Input Voltage
Output Voltage to Ground (Steady State)
Power Dissipation
Storage Temperature Range
Minimum ESD Rating
Lead Temperature (Soldering, 10 seconds)
Maximum Junction Temperature
DC Input
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
(Human Body Model: C = 100 pF, R = 1.5 k )
C in
Feedback
Unregulated
Sig Gnd
Rating
7.0 – 40 V
DC Input
+V in
5
1
2
R2
R1
1.0 k
22 F
Band–Gap
Reference
Representative Block Diagram and Typical Application
1.235 V
C in
(Absolute Maximum Ratings indicate limits beyond which
Typical Application (Fixed Output Voltage Versions)
Figure 1. Block Diagram and Typical Application
Fixed Gain
Error Amplifier
18 kHz
+V in
Freq
Shift
5
2
Oscillator
52 kHz
Sig
Gnd
Comparator
3.1 V Internal
Symbol
R JC
Regulator
R JA
T stg
LM2574
V in
P D
T J
4
–
–
–
–
Pwr
Gnd
LM2574
3
–0.3 V
Internally Limited
–65 C to +150 C
Reset
Latch
ON/OFF
Current
Limit
ON/OFF
Value
–1.0
100
260
150
1
Output
7
5.0
2.0
Feedback
45
V
Shutdown
Thermal
Driver
+V in
D1
1N5819
330 H
L1
1.0 Amp
Switch
Unit
C/W
C/W
MOTOROLA ANALOG IC DEVICE DATA
kV
W
C out
220 F
V
V
V
C
C
C
ON/OFF
3
Output
7
Pwr Gnd
4
5.0 V Regulated
Output 0.5 A Load
Voltage Versions
For adjustable version
R1 = open, R2 = 0
D1
Output
3.3 V
5.0 V
12 V
15 V
L1
C out
8.84 k
11.3 k
1.7 k
3.1 k
( )
R2
V out
Load