Texas Instruments LM5007MM Adjustable DC-DC Buck Regulator MSOP-8

The Texas Instruments LM5007MM is an adjustable DC-DC buck (step-down) switching regulator that delivers a 500mA continuous output current from a 9V to 75V input.

The LM5007MM integrates an 80V, 0.7A N-channel buck switch and an internal high-voltage Vcc regulator, which reduces the external component count of a circuit. It uses hysteretic control in which the on-time is inversely proportional to the input voltage (VIN), helping the operating frequency remain largely constant across changes in load and input voltage. The design provides a fast transient response to sudden load changes and does not require complex control loop compensation.

Key Features

• Adjustable output voltage from 2.5V to 73V
• Wide input voltage range of 9V to 75V
• Continuous output current of 500mA
• Typical switching frequency of 380kHz
• Integrated 80V, 0.7A N-channel buck switch
• Internal high-voltage Vcc regulator

Protection

The device includes a current limit function with a forced off-time that is inversely proportional to VOUT, which minimises load current foldback. Additional protection includes thermal shutdown, Vcc under-voltage lockout, gate drive under-voltage lockout, and a maximum duty cycle limiter.

Specifications

• Topology: Buck (Step Down)
• Package: MSOP-8 (VSSOP)
• Mounting: Surface Mount
• Operating Temperature: -40°C to +125°C
• Dimensions (W x D x H): 3.3 x 1.5 x 4.3
• Weight: 0.118 gm

Applications

The LM5007MM is suited to power supply bias applications and to space-constrained, surface-mount designs.