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LM2575 Datasheet(PDF) 2 Page - Texas Instruments

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

LM2575 Datasheet(HTML) 2 Page - Texas Instruments

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Internal
Regulator
ON/OFF
_
+
_
+
1.23-V
Band-Gap
Reference
52-kHz
Oscillator
Reset
Thermal
Shutdown
Current
Limit
FEEDBACK
7
CIN
+
VIN
6
Unregulated
DC Input
GND
5, 12, 13
OUTPUT
3
ON/OFF
9
COUT
+
D1
L
O
A
D
VOUT
1-A
Switch
Driver
Fixed-Gain
Error Amp
Comparator
R2
R1
R1 = Open, R2 = 0
L1
Absolute Maximum Ratings
(1)
Package Thermal Data
(1)
Recommended Operating Conditions
LM2575
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR
SLVS569E – JANUARY 2005 – REVISED JANUARY 2006
FUNCTIONAL BLOCK DIAGRAM
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
UNIT
VIN
Supply voltage
42
V
ON/OFF pin input voltage
–0.3
VIN
V
Output voltage to GND (steady state)
–1
V
TJ
Maximum junction temperature
150
°C
Tstg
Storage temperature range
–65
150
°C
(1)
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating
conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
PACKAGE
BOARD
θ
JC
θ
JA
PDIP (N)
High K, JESD 51-7
51
°C/W
67
°C/W
(1)
Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
UNIT
VIN
Supply voltage
4.75
40
V
TJ
Operating virtual junction temperature
–40
125
°C
2


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