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參數(shù)資料
| 型號(hào)： | LM2575-12IN |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP16 |
| 封裝： | MS-001BB, PLASTIC, DIP-16 |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大小： | 195K |
| 代理商： | LM2575-12IN |
www.ti.com
APPLICATION INFORMATION
Layout Guidelines
LM2575-xx
Fixed Output
CIN
100
F
+
+VIN
1
3
GND
5
D1
2
L1
330
H
COUT
330
F
+
4
L
O
A
D
VOUT
VIN
Unregulated
DC Input
CIN = 100 F, Aluminum Electrolytic
COUT = 330 F, Aluminum Electrolytic
D1 = Schottky
L1 = 330
H
Fixed Output Voltage Versions
LM2575
(ADJ)
CIN
100
F
+
+VIN
1
3
GND
5
ON/OFF
D1
11DQ06
OUTPUT
2
L1
330
H
COUT
330
F
+
FEEDBACK
4
L
O
A
D
VOUT
7-V to 60-V
Unregulated
DC Input
Adjustable Output Voltage Versions
VOUT = VREF(1 + R2/R1) = 5 V
Where,
VREF = 1.23 V
R1 = 2 kW
R2 = 6.12 kW
R2
R1
ON/OFF
OUTPUT
FEEDBACK
LM2575
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR
SLVS569D – JANUARY 2005 – REVISED JULY 2005
With any switching regulator, circuit layout plays an important role in circuit performance. Wiring and parasitic
inductances, as well as stray capacitances, are subjected to rapidly switching currents, which can result in
unwanted voltage transients. To minimize inductance and ground loops, the length of the leads indicated by
heavy lines should be minimized. Optimal results can be achieved by single-point grounding (see Figure 2) or by
ground-plane construction. For the same reasons, the two programming resistors used in the adjustable version
should be located as close as possible to the regulator to keep the sensitive feedback wiring short.
A.
Pin numbers are for the KTT (TO-263) package.
Figure 2. Test Circuit and Layout Guidelines
7
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