LT1307BCS8#PBF

PMIC - Voltage Regulators - DC DC Switching Regulators

The LT1307BCS8#PBF is a synchronization buck regulator with integrated high-side MOSFET. The device can be powered down to a low power state. It is built for applications that require high speed, low ripple, and a fixed frequency of 600KHz. The regulator also offers excellent designs for current limiting and short circuit protection. It also has a wide input voltage range from 3.2V to 6.5V.

Applications

The LT1307BCS8#PBF is ideal for applications that require high speed and low ripple. Examples of these applications are notebook computer power supplies, mobile A/V equipment, small battery-powered devices, and portable medical equipment. The device can power up high performance CPUs and other integrated circuits with very low noise and accurate regulation.

Working principle

The LT1307BCS8#PBF operates by synchronizing the high side MOSFET with the system clock. This clock is automatically synchronized with the input voltage and is divided by 4 using an internal divider network. During operation, the high side MOSFET is turned on for a fixed period then turned off for a fixed period, which is determined by the clock. The on-time of the MOSFET can be adjusted using an external resistor. After the MOSFET is turned off, current stops flowing and the output voltage is regulated by the internal feedback loop.

The output voltage is maintained by an internal voltage loop related to the external clock and the external resistor. This loop compares the feedback signal to the input voltage and adjusts the PWM signal to maintain the desired voltage. When the feedback voltage exceeds the reference voltage, the PWM signal is shut off and the power switch current is decreased. When the feedback signal is below the reference voltage, the PWM signal is opened and the current is switched to the output, resulting in the final output voltage.

Conclusion

The LT1307BCS8#PBF is an ideal solution for high speed, low ripple applications. Its range of features, wide input voltage range, and high accuracy make it an excellent choice for power supplies for notebook computers, mobile A/V equipment, battery-powered devices and more. The device is also protected from over current and short circuits and has excellent design flexibility and current protection.