RT6296BGJ8F Integrated Circuits (ICs)

The RT6296BGJ8F is a highly integrated monolithic, step-up dc-to-dc converter, which belongs to the category of DC DC Switching Regulators. It is produced by Richtek Technology Corp., a leader in the Power Management IC (PMIC) field. The RT6296BGJ8F is designed to provide an efficient, reliable and cost-effective solution for powering circuits that are demanding on battery-powered applications.

The RT6296BGJ8F has a floating-channel construction which reduces the number of external components. It offers peak efficiencies of up to 90%. The RT6296BGJ8F is capable of powering a wide range of loads, including ADC, logic control and power transistors, from input voltages as low as 6 V. Cold-start functions enable it to start up under cold load conditions and maintain steady operation. The RT6296BGJ8F also supports built-in soft-start and over-voltage protection.

To ensure design flexibility, the RT6296BGJ8F has several adjustable version and fixed version of internal voltage references (VREF). It provides an adjustable output voltage range of 1V to 8.5V and the fixed version of VREF can be programmed to a 0.4V, 0.5V or 0.6V voltage reference. In addition, it supports over-current shutdown, thermal shutdown, under-voltage lockout and over-voltage lockout protection.

The RT6296BGJ8F operates over a wide temperature range of -20C to 80C. It offers a total of 10 packages, a variety of fixed and adjustable versions, and output current up to 8A. The RT6296BGJ8F is ideal for use in battery-powered systems such as cell phones, PDAs, digital cameras, MP3 players and other portable electronic devices.

The available output voltage of RT6296BGJ8F is controlled by using the following basic elements:

• An internal oscillator
• An internal voltage reference (VREF)
• A pulse-width modulator (PWM)
• A compensation network

The operating principle of the RT6296BGJ8F is as follows:

First, the internal oscillator generates a constant clock signal. Then, the internal PWM allocates appropriate duty cycles based on the reference voltage. It also synchronizes the switching frequency and duty cycles of the internal power FETs.

Next, the internal voltage references are used to set the output voltage. An external resistor divider between the input and output of the device is used to keep the output voltage in a fixed value, while the resistor-capacitor (RC) compensation network, which operates with the PWM, is used to stabilize the voltage regulation loop.

Finally, current is drawn from the load, generating a load current signal. This signal, together with the voltage feedback signal, is sent to the switch logic that controls the power FETs. Thus, the RT6296BGJ8F can produce consistent and stable output power and voltage.

In summary, the RT6296BGJ8F is a highly integrated, near-perfect voltage regulator, suitable for a variety of battery-powered applications. It is cost effective, efficient, and offers excellent protection against over-current, under-voltage, over-voltage and thermal shutdown. Additionally, its wide range of external controls and options make it suitable for many different designs.