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参数资料
| 型号： | LM2574DW-ADJR2 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | PLASTIC, SO-16 |
| 文件页数： | 12/24页 |
| 文件大小： | 396K |
| 代理商： | LM2574DW-ADJR2 |
LM2574
2
MOTOROLA ANALOG IC DEVICE DATA
Figure 1. Block Diagram and Typical Application
7.0 – 40 V
Unregulated
DC Input
L1
330
H
Pwr
Gnd
+Vin
5
Cin
22
F
4ON/OFF
3
Output
7
Feedback
1
D1
1N5819
Cout
220
F
Typical Application (Fixed Output Voltage Versions)
Representative Block Diagram and Typical Application
Unregulated
DC Input
+Vin
5
Cout
Feedback
1
Cin
L1
D1
R2
R1
1.0 k
Output
7
Pwr Gnd
4
ON/OFF
3
Reset
Latch
Thermal
Shutdown
52 kHz
Oscillator
1.235 V
Band–Gap
Reference
Freq
Shift
18 kHz
Comparator
Fixed Gain
Error Amplifier
Current
Limit
Driver
1.0 Amp
Switch
ON/OFF
3.1 V Internal
Regulator
Vout
Load
Output
Voltage Versions
3.3 V
5.0 V
12 V
15 V
R2
(
)
1.7 k
3.1 k
8.84 k
11.3 k
For adjustable version
R1 = open, R2 = 0
LM2574
5.0 V Regulated
Output 0.5 A Load
Sig
Gnd
2
Sig Gnd
2
ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond which
damage to the device may occur).
Rating
Symbol
Value
Unit
Maximum Supply Voltage
Vin
45
V
ON/OFF Pin Input Voltage
–
–0.3 V
≤ V ≤ +Vin
V
Output Voltage to Ground (Steady State)
–
–1.0
V
DW Suffix, Plastic Package Case 751G
Max Power Dissipation
PD
Internally Limited
W
Thermal Resistance, Junction–to–Air
R
θJA
145
°C/W
N Suffix, Plastic Package Case 626
Max Power Dissipation
PD
Internally Limited
W
Thermal Resistance, Junction–to–Ambient
R
θJA
100
°C/W
Thermal Resistance, Junction–to–Case
R
θJC
5.0
°C/W
Storage Temperature Range
Tstg
–65
°C to +150°C
°C
Minimum ESD Rating
–
2.0
kV
(Human Body Model: C = 100 pF, R = 1.5 k
)
Lead Temperature (Soldering, 10 seconds)
–
260
°C
Maximum Junction Temperature
TJ
150
°C
NOTE: ESD data available upon request.
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