參數(shù)資料
型號(hào): LM2574
廠商: ON SEMICONDUCTOR
英文描述: 0.5 A, Adjustable Output Voltage, Step-Down Switching Regulator(0.5A,可調(diào)輸出電壓,降壓型開關(guān)穩(wěn)壓器)
中文描述: 0.5甲,可調(diào)輸出電壓,降壓型開關(guān)穩(wěn)壓器(0.5A的,可調(diào)輸出電壓,降壓型開關(guān)穩(wěn)壓器)
文件頁(yè)數(shù): 21/26頁(yè)
文件大小: 295K
代理商: LM2574
LM2574, NCV2574
http://onsemi.com
21
R2
15 k
Z1
1N5242
R1
15 k
Q1
2N3904
R3
68 k
C
in
22 F
LM2574XX
(12)
5
2
and
4
3
Gnds
Pins
ON/OFF
(5)
+V
in
+V
in
V
out
NOTE
: This picture does not show the complete circuit (see Figure 27).
Figure 34. Undervoltage Lockout Circuit for
BuckBoost Converter
(4)
and
(6)
Adjustable Output, LowRipple Power Supply
A 0.5 A output current capability power supply that
features an adjustable output voltage is shown in Figure 35.
This regulator delivers 0.5 A into 1.2 to 35 V output. The
input voltage ranges from roughly 3.0 to 40 V. In order to
achieve a 10 or more times reduction of output ripple, an
additional LC filter is included in this circuit.
D1
1N5819
L1
150 H
Output
7
1
Feedback
R2
50 k
R1
1.1 k
L2
20 H
Output
Voltage
1.2 to 35 V @ 0.5 A
Optional Output
Ripple Filter
40 V Max
Unregulated
DC Input
C
out
1000 F
C1
100 F
C
in
22 F
LM2574ADJ
(12)
5
3
4
ON/OFF
(5)
Pwr
Gnd
(6)
+V
in
2
Sig
Gnd
(4)
Figure 35. 1.2 to 35 V Adjustable 500 mA Power Supply with Low Output Ripple
(3)
(14)
相關(guān)PDF資料
PDF描述
LM2575-33IKTGR 1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR
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