LT6656BCDC-2.5#TRMPBF

Noise - 0.1Hz to 10Hz:	30ppmp-p
Base Part Number:	LT6656
Supplier Device Package:	6-DFN (2x2)
Package / Case:	6-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Current - Supply:	1.5µA
Voltage - Input:	3 V ~ 18 V
Noise - 10Hz to 10kHz:	80µVrms
Series:	--
Temperature Coefficient:	20ppm/°C
Tolerance:	±0.2%
Current - Output:	5mA
Voltage - Output (Min/Fixed):	2.5V
Output Type:	Fixed
Reference Type:	Series
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LT6656BCDC-2.5#TRMPBF is a voltage reference designed specifically for power management integrated circuits (PMICs). The device is designed to provide a stable, low noise, low ripple, zero drift and tightly regulated output voltage of 2.5V. The LT6656BCDC-2.5#TRMPBF has a fast startup, low-current self-biasing circuitry, and a 2.5V output. It features a low quiescent current and low input voltage operation. It is available in an 8-pin SOIC package for easy integration into chip level designs.

Application Field

The LT6656BCDC-2.5#TRMPBF is ideally suited for high performance regulated power supplies, battery and remote sensing applications. It is also suitable for standby mode power supplies and current-limiting circuits. The device is suitable for use in applications where large output voltage ranges and high precision output voltage control are required. Additionally, the device can be used in power adapters, motor controllers, switching regulators, and digital appliance power control circuits.

Working Principle

The LT6656BCDC-2.5#TRMPBF works according to the bandgap reference principle. It is capable of providing a tightly regulated output voltage of 2.5V, while maintaining a low quiescent current and low input voltage operation. The device utilizes an internal transistor, diode and zener diode to self-bias the circuit and provide both the reference output and the starting voltage for the circuit.The voltage reference of the device is generated by a bandgap reference circuit. This circuit consists of a diode and a transconductance amplifier. The circuit utilizes the temperature dependence of the forward biased diode current. This temperature dependence is used to generate a temperature stable reference voltage. The output voltage of the device is determined by the input voltage, the reference voltage and the current flowing into the amplifier.The LT6656BCDC-2.5#TRMPBF is designed to provide a stable, low noise, low ripple and low drift voltage reference, with low input voltages. The reference output of the device is accurately regulated even during dynamic operation, and has been tested to meet PMIC-Voltage reference requirements.

Regulation Measurement

The LT6656BCDC-2.5#TRMPBF can be tested to meet PMIC-Voltage reference requirements by measuring its regulation characteristics. The regulation measurement is performed by applying a few standard test conditions such as applying a known input voltage and then measuring the output voltage of the device and then adjusting the output by varying the input voltage. The regulation should remain constant over the whole temperature range and is expressed as a percentage of the output voltage change relative to the input voltage change. The output voltage of the device can also be adjusted using a trim circuit. The trim circuit is a simple resistive network that is connected between the external voltage input and the reference terminal of the device. This trimming technique is used to adjust the output voltage of the device very precisely. For example, the output voltage can be adjusted over a range of ±100mV with a 6-bit digital control signal.

Conclusion

The LT6656BCDC-2.5#TRMPBF is a voltage reference specifically designed for power management integrated circuits (PMICs). The device is designed to provide a stable, low noise, low ripple, zero drift and tightly regulated output voltage of 2.5V. It works according to the bandgap reference principle and is capable of meeting PMIC-Voltage reference requirements with its regulation characteristics. The output voltage of the device can also be adjusted using a trim circuit to provide a very precise adjustment range. The device is suitable for use in power management applications where accurate output voltage control is required.

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