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PMIC - Voltage Regulators - DC DC Switching Regulators

ADP2166ACPZ-1.5-R7 belongs to the DC DC switching regulator family and is a highly efficient and easily configurable, single-ended synchronous boost DC-DC converter. This device features a user-controlled differential current limit and can be configured without the need for a zero voltage switching (ZVS) driver. It is ideal for applications such as cellular phones, portable computers, industrial systems and communication systems.

This synchronous boost converter integrated with ADP2166ACPZ-1.5-R7 regulator rated for 1.5A and operational voltage range from 1V to 28V. It operates up to a frequency of 2.1MHz with an efficiency of up to 93%. The output voltage can be adjusted with an external resistor connected to FB pin, which only requires 0.78A quiescent current when configured to frequency at 2.1MHz.

Features of ADP2166ACPZ-1.5-R7

• High efficiency - up to 93% efficiency at 2.1MHz.
• User-controlled differential current limit control.
• Programmable switching frequency.
• Thermal and short-circuit protection.
• Low quiescent current.
• Compact package size.

Pin Configuration of ADP2166ACPZ-1.5-R7

The pin diagram of the ADP2166ACPZ-1.5-R7 is shown in Figure 1. It is a 8-pin package with all pins symmetrically spaced. This package type is intended for surface-mount applications and it is not recommended for through-hole applications.

Figure 1: Pin Configuration of ADP2166ACPZ-1.5-R7 IC (Source: Anachip)

Functional Block Diagram of ADC2166ACPZ-1.5-R7

The internal structure of the ADP2166ACPZ-1.5-R7 is shown in Figure 2. The device consists of a high-side MOSFET and a low-side MOSFET. The high-side and the low-side MOSFETs act as switching elements which help in regulating the output voltage.

Figure 2: Functional Block Diagram of ADP2166ACPZ-1.5-R7 (Source: Anachip)

Working Principle of ADC2166ACPZ-1.5-R7

The ADP2166ACPZ-1.5-R7 synchronous boost DC to DC converter operates according to the principles of pulse-width modulation. This converter features a MOSFET switching element at the input side to regulate the input voltage. The current is then regulated through a differential current limit control path. This device is capable of achieving high efficiency levels, due to the fact that the switching frequency can be set via an external resistor connected to the FB pin. The differential current limit feature allows the regulation of current at both the low-side and high-side MOSFETs, offering a better control of current loop.

The ADP2166ACPZ-1.5-R7 also features a soft-start function. This reduces any inrush current significantly at the time of power-up condition. And the device also features protection features namely, thermal shutdown, undervoltage lockout and overvoltage lockout which boosts the safety of the system.

Applications of ADC2166ACPZ-1.5-R7

The ADP2166ACPZ-1.5-R7 is an efficient and programmable synchronous boost DC to DC converter and has a very wide application fields. Some of its application areas are listed below:

• Cellular phones
• Tablets
• Compact midsize equipment
• Portable computer
• Industrial systems
• Communication systems

Conclusion

The ADP2166ACPZ-1.5-R7 is a high efficiency, single-ended synchronous boost DC-DC converter ideal for compact midsize equipment and portable applications. It operates up to a frequency of 2.1MHz with an efficiency of up to 93%. It is easy to configure and features a user-controlled differential current limit. It also offers various protection features such as thermal shutdown, under and overvoltage lockout. This device has a wide range of application in various portable systems and communication systems.

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