LT1534CS#TRPBF

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LT1534CS#TRPBF is an integrated circuit belonging to the family of DC DC switching voltage regulators. It is a high frequency current-mode switching regulator which integrates a wide array of features for reliable operation and flexibility. The device is designed to power portable or battery-powered systems operating from a single-cell Li-ion battery or other input sources, such as AC adapters.

The LT1534CS#TRPBF application field includes the following products:

• Networking and communication products
• Audio and video systems
• Cell phones and tablets
• Digital Still cameras
• Wearable electronic devices

The LT1534CS#TRPBF offers a pin-selectable current-mode architecture with fast response to the line and load transients. It supports input voltage range from 9V to 25V and provides a regulated output voltage of up to 15V. The device operates at a fixed switching frequency of up to 1.2MHz and can be programmed with external components with a single resistor to provide either a switching slew rate of 600mV/μs or gm–boosting WLCSP packages.

The LT1534CS#TRPBF working principle is based on Pulse Width Modulation (PWM) for the control of a transistor switch that regulates the output voltage. This process is divided in two parts. First, the PWM ramp generator creates an equidistant on/off cycling of the switch. The second part is the error amplifier, which follows the input voltage and changes the pulse rate according to desired output. When the output voltage is higher than the reference voltage, the pulses will come more slowly, thus decreasing the power delivered to the load and reducing the output voltage. The reference voltage is kept constant by the voltage-mode control.

The LT1534CS#TRPBF device also offers stable operation in discontinuous conduction mode, which reduces the input current ripple. It includes two short-circuit protection features: the foldback current limiting and the over-voltage protection. Also, the device enables a low-noise power supply design as well as system diagnostics with integrated feature like an open/short sense circuit, Current Sense Error Amplifier, and Thermal Protection.

To sum up, the LT1534CS#TRPBF is a DC DC voltage regulator belonging to the family of DC DC switches. It is designed to power portable or battery-powered systems operating from a single-cell Li-ion battery or other input sources, such as AC adapters. The device supports input voltage range from 9V to 25V and provides a regulated output voltage of up to 15V. It offers a pin-selectable current-mode architecture with fast response to the line and load transients and uses Pulse Width Modulation for the control of a transistor switch. Furthermore, it supports operation in discontinuous conduction mode and provides a variety of features for reliable operation, such as current limiting and over-voltage protection.

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