LTC3499EDD#TRPBF

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The LTC3499EDD#TRPBF is a high efficiency DC-DC step-down switching regulator with a variety of features to enable easy design implementation. It is specifically designed for space-constrained portable applications operating from a single Li-ion cell. The device offers a wide range of adjustable output voltages down to 0.6V and up to 95% efficiency.

The LTC3499EDD#TRPBF belongs to the category of PMIC (Power Management Integrated Circuit) – Voltage Regulators – DC DC Switching Regulators. It simplifies the design of power solutions while minimizing power loss and component count. The device’s integrated N-channel MOSFET enables it to provide up to 1A of current with high efficiency, even under no load, while keeping the quiescent current down to 7μA.

The LTC3499EDD#TRPBF integrates all the necessary functions of a step-down, synchronous DC-DC regulator into a small space saving TSOT-23–6. The device includes a 2.2 MHz PWM oscillator and a high-side/low-side current sense amplifier for fast, efficient current sensing. The device includes an output voltage over-voltage protection and under-voltage protection function that protects the device and load from operating outside the desired output voltage range.

The LTC3499EDD#TRPBF provides optimal efficiency over a wide input voltage range, from 3V to 5.5V, and can deliver up to 1A of continuous output current. The device also features an internal low-frequency loop compensation network which simplifies the compensation process. This device provides a smooth, low-noise output, and prevents subharmonic oscillations. The device supports a wide range of external components for optimizing the overall performance of the system, including inductors, ceramic capacitors and external resistors.

In addition, the LTC3499EDD#TRPBF supports standard PWM-mode and pulse skipping-mode control, enabling load transient response times of as low as 10μs. The device also features an adjustable soft-start, providing optimal power-up sequencing and increasing system robustness. The device supports an external clock signal to reduce the output noise, and can be synchronized to an external signal to reduce total harmonic distortion.

Furthermore, the device offers a wide range of integrated protection features to protect the system from an array of common fault conditions, including over-current protection, over-temperature protection, short-circuit protection, and under-voltage lockout. This helps to increase system robustness and reliability by preventing degradation caused by common fault conditions.

The LTC3499EDD#TRPBF offers designers all the features of a standard step-down, synchronous DC-DC switching regulator, and the added benefit of a wide input voltage range, high efficiency and low quiescent current operation. The device’s integrated protection and standby functions also enable efficient system design and minimizes component count in a variety of space-constrained applications.

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