TPS62182YZFR

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The TPS62182YZFR is a high-efficiency synchronous step-down DC/DC converter that can deliver up to 1.5A of continuous output current. It has a wide input voltage range of 3.4V – 22V and can output a variety of fixed voltages as low as 0.6V. The TPS62182YZFR operates from a PWM mode and uses an on-chip pulse-width modulation (PWM) controller to provide high efficiency and tight VOUT regulation. The device is available in a 4mmx4mm 20-pin TSSOP package and is optimized for functionality, stability, and power saving.

The TPS62182YZFR is ideal for applications where minimum board space and high efficiency is of paramount importance such as digital audio and consumer electronics. The device has a low quiescent current of only 8μA while operating and 8μA while in shutdown mode. It operates at a switching frequency of 700kHz, which is adjustable with an external resistor. The device boasts a 47uA current limit on the power switch. It also features an Under-Voltage Lockout (UVLO) function with a hysteresis of 100mV that prevents the device from operating at low input voltages, safeguarding it from operation in a region of low efficiency.

The TPS62182YZFR is part of Texas Instrument\'s family of High-Efficiency Synchronous Step-Down DC/DC Converters along with the TPS62181, TPS62183, and TPS62185. It is designed for applications requiring high efficiency, low output ripple and low noise. It incorporates current-mode PWM control with a fixed operating frequency of 700kHz and internal compensation for simple design and fast transient response. Its programmable soft-start feature allows the output voltage to be ramped up in a controlled manner while minimizing inrush current. It also features an on-board totem pole MOSFET driver and external synchronization inputs to modulate the oscillator frequency.

The TPS62182YZFR device features an adjustable soft-start function to limit the inrush current during startup. It is capable of providing a user-adjustable voltage step-down solution with low output ripple and fast transient response. The soft-start of the device works by increasing the main power switch on-time until its final value is achieved. This eliminates any large output voltage drops due to a heavy load condition during the start-up of the device. When the output voltage reaches the preset value, the soft start stops accordingly, and the device enters its normal operation mode.

The device also features a power-saving mode that reduces the quiescent current by as much as 50% during no load condition. The power saving mode is enabled by turning off the oscillator during the idle periods, which eliminates the switching loss, thus providing higher efficiency. The user can choose to optimize the system power dissipation by changing the frequency mode and changing the output voltage dynamically. The switching frequency can be modulated up to 800kHz, depending on the application needs.

In summary, the TPS62182YZFR is an ideal choice for a wide range of high-efficiency synchronous step-down DC/DC converter applications such as digital audio, consumer electronics, and automotive. The device offers a wide input voltage range, low quiescent current, and high efficiency, while the adjustable switching frequency and current limit ensures system reliability and provide flexibility for the user.

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