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LM2575-15IKTGR Arkusz danych(PDF) 5 Page - Texas Instruments

Numer części LM2575-15IKTGR
Szczegółowy opis  1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

LM2575-15IKTGR Arkusz danych(HTML) 5 Page - Texas Instruments

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Electrical Characteristics
LM2575
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR
SLVS569D – JANUARY 2005 – REVISED JULY 2005
I
LOAD = 200 mA, VIN = 12 V for 3.3-V, 5-V, and adjustable versions, VIN = 25 V for 12-V version, VIN = 30 V for 15-V version
(unless otherwise noted) (see Figure 2)
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP
MAX
UNIT
VIN = 12 V, ILOAD = 0.2 A
25
°C
3.234
3.3
3.366
LM2575-33
25
°C
3.168
3.3
3.432
4.75 V
≤ V
IN ≤ 40 V,
0.2 A
≤ I
LOAD ≤ 1 A
Full range
3.135
3.465
VIN = 12 V, ILOAD = 0.2 A
25
°C
4.9
5
5.1
LM2575-05
25
°C
4.8
5
5.2
8 V
≤ V
IN ≤ 40 V,
0.2 A
≤ I
LOAD ≤ 1 A
Full range
4.75
5.25
VOUT
Output voltage
V
VIN = 25 V, ILOAD = 0.2 A
25
°C
11.76
12
12.24
LM2575-12
25
°C
11.52
12
12.48
15 V
≤ V
IN ≤ 40 V,
0.2 A
≤ I
LOAD ≤ 1 A
Full range
11.4
12.6
VIN = 30 V, ILOAD = 0.2 A
25
°C
14.7
15
15.3
LM2575-15
25
°C
14.4
15
15.6
18 V
≤ V
IN ≤ 40 V,
0.2 A
≤ I
LOAD ≤ 1 A
Full range
14.25
15
15.75
VIN = 12 V, VOUT = 5 V,
25
°C
1.217
1.23
1.243
ILOAD = 0.2 A
Feedback voltage
LM2575-ADJ
V
25
°C
1.193
1.23
1.267
8 V
≤ V
IN ≤ 40 V, VOUT = 5 V,
0.2 A
≤ I
LOAD ≤ 1 A
Full range
1.18
1.28
LM2575-33
VIN = 12 V, ILOAD = 1 A
75
LM2575-05
VIN = 12 V, ILOAD = 1 A
77
LM2575-12
VIN = 15 V, ILOAD = 1 A
88
η
Efficiency
25
°C
%
LM2575-15
VIN = 18 V, ILOAD = 1 A
88
VIN = 12 V, VOUT = 5 V,
LM2575-ADJ
77
ILOAD = 1 A
25
°C
50
100
IIB
Feedback bias current
VOUT = 5 V (ADJ version only)
nA
Full range
500
25
°C
47
52
58
fo
Oscillator frequency
(1)
kHz
Full range
42
63
25
°C
0.9
1.2
VSAT
Saturation voltage
IOUT = 1 A(2)
V
Full range
1.4
Maximum duty cycle
(3)
25
°C
93
98
%
25
°C
1.7
2.8
3.6
ICL
Peak current
(1) (2)
A
Full range
1.3
4
VIN = 40(4), Output = 0 V
2
IL
Output leakage current
25
°C
mA
VIN = 40(4), Output = –1 V
7.5
30
IQ
Quiescent current
(4)
25
°C
5
10
mA
ISTBY
Standby quiescent current
OFF (ON/OFF pin = 5 V)
25
°C
50
200
µA
25
°C
2.2
1.4
VIH
OFF (VOUT = 0 V)
Full range
2.4
ON/OFF logic input level
V
25
°C
1.2
1
VIL
ON (VOUT = nominal voltage)
Full range
0.8
IIH
OFF (ON/OFF pin = 5 V)
12
30
ON/OFF input current
25
°C
µA
IIL
OFF (ON/OFF pin = 0 V)
0
10
(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.
(2)
Output is not connected to diode, inductor, or capacitor. Output is sourcing current.
(3)
Feedback is disconnected from output and connected to 0 V.
(4)
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.
5


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