LM25007MMX Datasheet, PDF (11/19 Pages) Texas Instruments – LM25007 42V, 0.5A Step-Down Switching Regulator

LM25007
www.ti.com
SNVS401C – JANUARY 2006 – REVISED FEBRUARY 2013
Thermal Protection
Internal Thermal Shutdown circuitry is provided to protect the integrated circuit in the event the maximum junction
temperature is exceeded. When thermal protection is activated, typically at 165 degrees Celsius, the controller is
forced into a low power reset state, disabling the output driver. This feature is provided to prevent catastrophic
failures from accidental device overheating.
Minimum Load Current
A minimum load current of 1 mA is required to maintain proper operation. If the load current falls below that level,
the bootstrap capacitor may discharge during the long off-time, and the circuitwill either shutdown, or cycle on
and off at a low frequency. If the load current is expected to drop below 1 mA in the application, the feedback
resistors should be chosen low enough in value so they provide the minimum required current at nominal Vout.
10V, 400mA Demo Board Bill of Materials
See Typical Application Circuit and Block Diagram
ITEM
C1
C2
C3
C4
C5
D1
L1
R1
R2
R3
R4
R5
U1
PART NUMBER
C4532X7R2A105M
C4532X7R1E156M
C1206C104K5RAC
C1206C103K5RAC
C3216X7R2A104KT
MURA110T3
SLF7045T-101MR60-1
CRCW12062003F
CRCW12061003F
CRCW12063011F
CRCW12061001F
CRCW12061R00F
LM25007
Table 1. Bill of Materials
DESCRIPTION
CAPACITOR, CER, TDK
CAPACITOR, CER, TDK
CAPACITOR, CER, KEMET
CAPACITOR, CER, KEMET
CAPACITOR, CER, TDK
DIODE, 100V, ON SEMI
BUCK INDUCTOR, TDK
RESISTOR
RESISTOR
RESISTOR
RESISTOR
RESISTOR
REGULATOR, TI
VALUE
1µ, 100V
15µ, 25V
0.1µ, 50V
0.01µ, 50V
0.1µ, 100V
100µH
200K
100K
3.01K
1K
1
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