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LM2575 Datasheet(PDF) 3 Page - Texas Instruments

Part No. LM2575
Description  1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM2575 Datasheet(HTML) 3 Page - Texas Instruments

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Electrical Characteristics
LM2575
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR
SLVS569E – JANUARY 2005 – REVISED JANUARY 2006
I
LOAD = 200 mA, VIN = 12 V (unless otherwise noted) (see Figure 1)
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP
MAX
UNIT
VOUT = 5 V, ILOAD = 0.2 A
25
°C
1.217
1.23
1.243
VOUT
Feedback voltage
25
°C
1.193
1.23
1.267
V
8 V
≤ V
IN ≤ 40 V, VOUT = 5 V,
0.2 A
≤ I
LOAD ≤ 1 A
Full range
1.18
1.28
η
Efficiency
VIN = 12 V, VOUT = 5 V, ILOAD = 1 A
25
°C
77
%
25
°C
50
100
IIB
Feedback bias current
VOUT = 5 V
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
ON (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.
3


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