LP2985A-28DBVRG4

Current - Output:	150mA
Base Part Number:	LP2985A-28
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	45dB (1kHz)
Current - Supply (Max):	2.5mA
Current - Quiescent (Iq):	95µA
Series:	--
Voltage Dropout (Max):	0.58V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

LP2985A-28DBVRG4 is a 3-terminal low-dropout (LDO) regulator designed to provide a best-in-class DC output voltage accuracy of ±0.5%(max) over line, load and temperature conditions. The device is well-suited for applications requiring high accuracy and low noise, such as cameras, audio amplifiers and power management functions in handheld devices. This device can provide up to 150 mA of steady state current and offers an adjustable output ranging from 1.5V to 4.0 V.The LP2985A-28DBVRG4 belongs to the family of PMIC (Power Management Integrated Circuit) Voltage Regulators and is classified as a Linear Regulator. Linear regulators maintain a regulated output voltage by dissipating excess voltage as heat. This design provides some of the best thermal performance in the market. It also offers an excellent line sensitivity of 2mV/V (max) and a low noise performance of 15uV (max).

Overview

The LP2985A-28DBVRG4 power management IC (PMIC) is an adjustable linear regulator with a wide input voltage range of 2.3V to 5.5V and an output voltage range of 1.5V to 4V. It offers a wide range of convenient configuration pins, making integration on any platform quick and easy. It also features low-dropout (LDO) design with low noise performance, best-in-class accuracy, and improved thermal performance. It has a low quiescent current of 1.0 mA (max) at full load. The LP2985A-28DBVRG4 is offered in a small, 20-pin metric TSSOP (Thin Shrink Small Outline Package) package and is designed to provide better EMI performance. The package provides improved thermal dissipation, low-noise, small size and low profile. This makes the device suitable for applications requiring a small form factor, such as Mobile Products, Tablet Computers and Medical equipment where a reduced height is a requirement.

Functionality

The three terminals of the LP2985A-28DBVRG4 are IN, OUT and ADJ (Adjust). The IN terminal is connected to the unregulated supply (as high as 5.5 V) and the OUT terminal provides the regulated output voltage. When the load current increases, the IC will reduce the voltage across the load and increase the voltage at the output pin. This regulated output voltage is regulated by the Adjust input. The Adjust pin is used to set the desired output voltage. It is also used to enable or disable the device.The LP2985A-28DBVRG4 is designed with two power-down modes. The Normal mode and the ShutDown mode. When the normal mode is enabled, the output voltage is held at the programmed setpoint and current can flow through the Load. In theShutdown Mode, the IC stops providing output current and will enter into a complete shutdown state, reducing the total power consumption of the circuit.In addition, the device also includes a reverse current protection circuit which prevents current from flowing backwards from the output to the input when the output voltage is higher than the input voltage, essentially protecting both the IC and the device it is powering.

Application Field

The LP2985A-28DBVRG4 is ideal for a wide range of applications requiring highly-accurate and low-noise power management. Its ability to provide a wide adjustable voltage range and low noise performance makes it the perfect choice for applications such as camera and audio systems, IoT (Internet of Things) products, and power management functions in handheld devices.In cameras and audio systems, the LP2985A-28DBVRG4 can be used to precisely control and provide low-noise power to microphones, cameras, amplifiers, and other components. The device enables accurate voltage regulation, which is essential for providing detailed audio recording or capturing high-quality photographic images.It is also becoming increasingly popular in IoT products and handheld devices due to its low quiescent current, very small size and low profile, improved thermal performance, and its wide input voltage range. This makes it the perfect component for applications such as smartphone battery charging systems, wireless sensor networks, and wearable electronics.

Conclusion

The LP2985A-28DBVRG4 is an adjustable, low-dropout linear regulator designed to provide best-in-class accuracy and low noise performance. Its three terminals allow it to be easily integrated into a wide range of applications requiring precise voltage regulation ranging from camera systems and audio amplifiers to power management functions in handheld devices. It is also offered in a small package, making it ideal for applications where a reduced height is a requirement. This makes it an ideal choice for a wide range of applications, such as mobile products, tablet computers and medical equipment.

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