LM5035CMH/NOPB

LM5035CMH/NOPB Application Field and Working Principle

The LM5035CMH/NOPB is a Pulse Width Modulation (PWM) voltage regulator from Texas Instruments. It is a step-up DC-to-DC converter specifically designed for low- to mid-powered applications, and is part of the TI Platinum Series family of Voltage Regulators. This device is designed for use in many applications that require a higher voltage for optimal operation in comparison to the supply voltage, such as in notebook computers, DSPs, microprocessor applications, laptop adaptors, and low-to-mid-voltage automotive applications.

The device features a wide operating temperature range of -40 degrees Celsius to +85 degrees Celsius and an integrated power FET switch. It also includes an internal voltage start-up that ensures the device will start up or wake up independent of the load and can be triggered externally. This enables applications with low standby current without having to worry about the load being in an unknown state. The LM5035 can also be used to further enhance the efficiency and thermal management of portable devices by operating over a 0.8V to a 4.3V input range.

The LM5035CMH/NOPB employs a pulse width modulation (PWM) switching topology to perform DC-to-DC conversion. The device consists of an oscillator and the associated logic to ensure an average output voltage. It has a full-speed operation that allows a wide input voltage range from 4.3V to 0.8V. It also has an adjustable frequency from 100KHz to 1MHz. In addition, the device can also be synchronized to an external clock from 100kHz to 3MHz.

The device features an integrated high-side N-channel power FET switch, an integrated high voltage current source driver, an integrated low-side N-channel Power FET switch, and an adjustable frequency oscillator. The high-side power FET switch allows the device to start up or wake up independently of the load and can be triggered externally. The integrated low-side power FET switch allows the device to regulate a high output voltage. The adjustable frequency oscillator allows the device to operate over wide input voltage range from 4.3V to 0.8V.

The integrated high voltage current source driver provides protection against input under-voltage, output over-voltage, output over-current and short-circuit conditions. The device also features an adjustable soft-start function, pulse-by-pulse current limitation, and frequency synchronization to an external clock. In addition, it also includes internal soft-stop of both the integrated low-side and high-side power FETs. The LM5035CMH/NOPB is available in a 16-pin TSSOP package.

Conclusion

The LM5035CMH/NOPB is a versatile step-up DC-to-DC converter that is specifically designed for low- to mid-powered applications. It features an internal power FET switch, an integrated high voltage current source driver, and adjustable frequency oscillator that allows the device to operate over wide input voltage range from 4.3V to 0.8V. Its ability to start up or wake up independently of the load makes it suitable for applications with low standby current. The device is available in a 16-pin TSSOP package.