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參數(shù)資料
| 型號： | LM2575-15IKTTR |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR |
| 中文描述： | 1 -一種簡易降壓開關(guān)穩(wěn)壓 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 195K |
| 代理商： | LM2575-15IKTTR |
www.ti.com
Electrical Characteristics
I
LOAD
= 200 mA, V
IN
= 12 V for 3.3-V, 5-V, and adjustable versions, V
IN
= 25 V for 12-V version, V
IN
= 30 V for 15-V version
(unless otherwise noted) (see
Figure 2
)
LM2575
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR
SLVS569D–JANUARY 2005–REVISED JULY 2005
PARAMETER
TEST CONDITIONS
V
IN
= 12 V, I
LOAD
= 0.2 A
T
J
MIN
3.234
3.168
3.135
4.9
4.8
4.75
11.76
11.52
11.4
14.7
14.4
14.25
TYP
3.3
3.3
MAX
3.366
3.432
3.465
5.1
5.2
5.25
12.24
12.48
12.6
15.3
15.6
15.75
UNIT
25
°
C
25
°
C
LM2575-33
4.75 V
≤
V
IN
≤
40 V,
0.2 A
≤
I
LOAD
≤
1 A
Full range
25
°
C
25
°
C
Full range
25
°
C
25
°
C
Full range
25
°
C
25
°
C
Full range
V
IN
= 12 V, I
LOAD
= 0.2 A
5
5
LM2575-05
8 V
≤
V
IN
≤
40 V,
0.2 A
≤
I
LOAD
≤
1 A
V
OUT
Output voltage
V
V
IN
= 25 V, I
LOAD
= 0.2 A
12
12
LM2575-12
15 V
≤
V
IN
≤
40 V,
0.2 A
≤
I
LOAD
≤
1 A
V
IN
= 30 V, I
LOAD
= 0.2 A
15
15
15
LM2575-15
18 V
≤
V
IN
≤
40 V,
0.2 A
≤
I
LOAD
≤
1 A
V
IN
= 12 V, V
OUT
= 5 V,
I
LOAD
= 0.2 A
25
°
C
1.217
1.23
1.243
Feedback voltage
LM2575-ADJ
V
25
°
C
1.193
1.18
1.23
1.267
1.28
8 V
≤
V
IN
≤
40 V, V
OUT
= 5 V,
0.2 A
≤
I
LOAD
≤
1 A
Full range
LM2575-33
LM2575-05
LM2575-12
LM2575-15
V
IN
= 12 V, I
LOAD
= 1 A
V
IN
= 12 V, I
LOAD
= 1 A
V
IN
= 15 V, I
LOAD
= 1 A
V
IN
= 18 V, I
LOAD
= 1 A
V
IN
= 12 V, V
OUT
= 5 V,
I
LOAD
= 1 A
75
77
88
88
η
Efficiency
25
°
C
%
LM2575-ADJ
77
25
°
C
50
100
500
58
63
1.2
1.4
I
IB
Feedback bias current
V
OUT
= 5 V (ADJ version only)
nA
Full range
25
°
C
Full range
25
°
C
Full range
25
°
C
25
°
C
Full range
47
42
52
f
o
Oscillator frequency
(1)
kHz
0.9
V
SAT
Saturation voltage
I
OUT
= 1 A
(2)
V
Maximum duty cycle
(3)
93
1.7
1.3
98
2.8
%
3.6
I
CL
Peak current
(1)(2)
A
4
2
V
IN
= 40
(4)
, Output = 0 V
V
IN
= 40
(4)
, Output = –1 V
(4)
I
L
Output leakage current
25
°
C
mA
7.5
30
10
I
Q
I
STBY
Quiescent current
Standby quiescent current
25
°
C
25
°
C
25
°
C
5
mA
μ
A
OFF (ON/OFF pin = 5 V)
50
1.4
200
2.2
2.4
V
IH
OFF (V
OUT
= 0 V)
Full range
25
°
C
Full range
ON/OFF logic input level
V
1.2
1
V
IL
ON (V
OUT
= nominal voltage)
0.8
30
10
I
IH
I
IL
OFF (ON/OFF pin = 5 V)
OFF (ON/OFF pin = 0 V)
12
0
ON/OFF input current
25
°
C
μ
A
(1)
In the event of an output short or an overload condition, self-protection features lower the oscillator frequency to
～
18 kHz and the
minimum duty cycle from 5% to
～
2%. The resulting output voltage drops to
～
40% of its nominal value, causing the average power
dissipated by the IC to lower.
Output is not connected to diode, inductor, or capacitor. Output is sourcing current.
Feedback is disconnected from output and connected to 0 V.
To force the output transistor off, FEEDBACK is disconnected from output and connected to 12 V for the adjustable, 3.3-V, and 5-V
versions; and 25 V for the 12-V and 15-V versions.
(2)
(3)
(4)
5
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|---|---|
| LM2575-15IN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR |
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| LM2575-15TA5R | 制造商:FCI 制造商全稱:First Components International 功能描述:1.0A Step - Down Voltage Switching Regulators 1A output current |
| LM2575-15TA5T | 制造商:FCI 制造商全稱:First Components International 功能描述:1.0A Step - Down Voltage Switching Regulators 1A output current |
| LM2575-15TB5BT | 制造商:FCI 制造商全稱:First Components International 功能描述:1.0A Step - Down Voltage Switching Regulators 1A output current |
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