LM25007

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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

Table 1. Bill of Materials

ITEM

PART NUMBER

DESCRIPTION

VALUE

C1

C4532X7R2A105M

CAPACITOR, CER, TDK

1µ, 100V

C2

C4532X7R1E156M

CAPACITOR, CER, TDK

15µ, 25V

C3

C1206C104K5RAC

CAPACITOR, CER, KEMET

0.1µ, 50V

C4

C1206C103K5RAC

CAPACITOR, CER, KEMET

0.01µ, 50V

C5

C3216X7R2A104KT

CAPACITOR, CER, TDK

0.1µ, 100V

D1

MURA110T3

DIODE, 100V, ON SEMI

L1

SLF7045T-101MR60-1

BUCK INDUCTOR, TDK

100µH

R1

CRCW12062003F

RESISTOR

200K

R2

CRCW12061003F

RESISTOR

100K

R3

CRCW12063011F

RESISTOR

3.01K

R4

CRCW12061001F

RESISTOR

1K

R5

CRCW12061R00F

RESISTOR

1

U1

LM25007

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