LTC3632IDD#TRPBF

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The LTC3632IDD#TRPBF is a highly integrated synchronous step-down DC/DC switching regulator system aimed at powering ultra-low-voltage processing systems. It belongs to the family of DC DC switching regulators under the PMIC (Power Management IC) umbrella. It offers solution for devices that do not have access to multiple LDOs, or linear regulator behaviour is not possible due to output current loading or efficiency requirement. As a matter of fact, the LTC3632IDD#TRPBF is designed for devices requiring low power draw and noise, such as tablet computers, mobile handsets and other portable devices.

The LTC3632IDD#TRPBF switching regulator utilizes a 20V internal power switch to generate an output voltage as low as 0.6V - 5.0V. The design includes a high-frequency P-channel MOSFET, allowing for a wide input voltage range of 2.0V - 20V. This makes the device suitable for most mobile applications, requiring portability and wide input voltage range. It has adjustable current limit, as well as programmable switching frequency.

Using an external reference, the device can be configured to generate fixed output voltages from 0.6V - 5.0V. The regulator will remain within 5% accuracy over the entire temperature range of –40°C to 125°C. The LTC3632IDD#TRPBF includes the necessary feedback and gate drive components to form a synchronous direct-to-buck regulator.

The device also features an 8-bit DAC control input and an RT-PGOOD open-drain output to indicate the mission of the regulator which enables it to communicate with other devices seamlessly. So, the device can be employed in applications where tight control over the output voltage and current is necessary. The input voltage can also be monitored using the onboard UVLO (Under Voltage Lockout) system.

The working principle behind the LTC3632IDD#TRPBF is simple. The external reference, connected to the VREF pin, is used to adjust the internal adjusted peak current limit resistor and set the desired output voltage of the switch controller. The peak current limit is then detected by the internal comparator and the drive signal from the regulator’s signal amp is adjusted accordingly. A P-channel MOSFET, driven by the signal amp, then controls the current, by switching on and off at a fixed frequency as set by the external clock or internal oscillator, to regulate the output voltage.

The LTC3632IDD#TRPBF is a cost-effective, highly integrated and efficient synchronous buck switching regulator, particularly suitable for low-voltage, portable applications where tight control over the output voltage and current is necessary. This voltage regulator offers a wide operational input voltage range, adjustable current limit and programmable switching frequency.

The device is ideal for use in mobile handsets, tablets and other portable devices, including ultra low power and noise requirements that demand higher efficiency and tighter control.

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