LM5007 application circuit diagram

The LM5007 is an integrated step-down switching regulator that has all the necessary systems required to make a cost-effective and reliable switching regulator circuit. The IC is available in MSOP-8, LLp-8 packages and has many built-in features such as thermal shutdown, undervoltage lockout, duty cycle limiting, current limiting, etc.

The output voltage of this regulator can be adjusted using resistors R3 and R4. For the given values ​​of R3 and R4 in the circuit diagram, the output voltage will be 10V. The formula for controlling the output voltage is Vout = 2.5x (R3 + R4) / R4. Resistor R1 sets the switch on time and C4 is the boost bootstrap capacitor. Resistor R2 determines the change in the off time and C3 is the decoupling capacitor.

LM5007 pin diagram

LM5007 Typical Application Schematic Diagram

LM5007 application circuit diagram (I)

The supply voltage can be anywhere between 12 and 72 VDC.

The output voltage can be adjusted using R3 and R4.

C1 and C5 are polyester capacitors.

C1 and C2 must be rated for at least 100V.

R5 and C5 form a filter network.

The output current limit of LM5007 is 700mA.

LM5007 application circuit diagram (II)