Datasheet

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

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 REGULATOR, TI

Product Folder Links: LM25007