ISL6549CRZ

Introduction:

The ISL6549CRZ is a high efficiency, dual-output linear and switching voltage regulator. It is designed for applications requiring two separate voltages—one which is adjustable from 0.8 V to 1.236 V and and the other from 1.236 V to 5 V. The device includes an adjustable external resistor divider and current limit protection. The voltage can be adjusted using a single external resistor. High efficiency is achieved by using ultra low on-resistance DMOS power FETs. The external output current setting is more accurate than most charge pumps because of its precision control of the external current limit resistor, and very good transient response due to internal high-frequency switching regulators.

Application Field:

This dual-output voltage regulator has many different applications. It can be used in a variety of applications including computing, networking, communications and consumer electronics. It is also suitable for low noise, high power, and low power devices. The ISL6549CRZ is ideal for applications requiring two distinct voltages. This device is ideal for computing and networking applications, or secure devices such as secure cell phones or smart cards that require two different voltages. The device features a high efficiency output stage, high input voltage range and current limit protection.

Working Principle:

The ISL6549CRZ voltage regulator has a single output stage with a switchable internal pass element. The output voltage is controlled by an external resistor divider and current is limited by an external current limit resistor. It also includes an internal bandgap reference to guarantee low noise and high accuracy. The ISL6549CRZ voltage regulator circuit includes a voltage reference, a voltage error amplifier, and a driver. The amplifier and driver use negative feedback to hold the output voltagesteady. The output current is determined by the value of the external current limit resistor. The device also includes a logic control circuit that controls the state of the internal pass element to regulate the output voltage. It has a switching frequency that can be set with an external resistor. The device is designed for a wide range of input voltages up to 5 V. The ISL6549CRZ features a low-dropout operation, low standby current and excellent transient response.

Conclusion:

The ISL6549CRZ is a high efficiency, dual-output linear and switching voltage regulator. It is designed to meet the needs of applications requiring two separate voltages—one which is adjustable from 0.8 V to 1.236 V and and the other from 1.236 V to 5 V. The device has high efficiency, low on-resistance DMOS FETs, and a precision external output current setting. It features a wide range of input voltages and excellent transient response. The device is ideal for computing and networking applications or secure devices such as secure cell phones or smart cards that require two different voltages.