ADPL44002AUJZ-3.3-R7

Overview

The ADPL44002AUJZ-3.3-R7 is a CMOS low dropout linear regulator manufactured by Analog Devices Inc. It operates within an input voltage range of 2.7V to 40V and provides up to 200mA of output current. The device features a fixed 3.3V output with an initial accuracy of ±1%. Key electrical parameters include a typical quiescent current of 80µA, a shutdown current of 1.8µA at 6V input, and a power supply rejection ratio of 78dB at 10kHz. The regulator achieves a typical dropout voltage of 220mV at full load and maintains an output noise of 20µVRMS. It is housed in a TSOT-23-5 package.

Feature Summary

• Provides ultralow output noise of 20µVRMS independent of the fixed output voltage setting.
• Features user-programmable soft start capability via an external capacitor connected to the SS pin.
• Includes precision enable logic with internal hysteresis to prevent oscillation during threshold transitions.
• Designed for stability using small ceramic capacitors, requiring only a minimum of 2.2µF on the output.

Applications

• Powering ADC and DAC circuits requiring clean voltage rails
• Precision amplifier biasing and signal conditioning
• VCO VTUNE control regulation
• Medical and healthcare instrumentation systems

Procurement Notes

Verify the specific package type against the datasheet, as the ADPL44002 series includes both LFCSP and TSOT options. Confirm that the ordering suffix corresponds to the required tape and reel quantity. Ensure the component meets RoHS compliance standards if required by your manufacturing process. Cross-reference the manufacturer part number with authorized distributors to guarantee authenticity and traceability.

Selection Notes

Select this regulator when high input voltages up to 40V must be stepped down to stable analog rails. The fixed 3.3V option eliminates the need for external feedback resistors while maintaining low noise performance. Consider the thermal characteristics of the TSOT-23-5 package for applications with significant power dissipation. Verify that the load current requirements do not exceed the 200mA maximum limit under all operating conditions.

Part Context

This component belongs to the ADPL44002 family of high-voltage LDO regulators designed for sensitive analog and mixed-signal applications. The family offers various fixed output voltages and adjustable configurations. The AUJZ suffix indicates the specific 3.3V fixed output variant packaged in a TSOT-23-5 form factor, optimized for space-constrained designs requiring robust line regulation and transient response.

Replacement Considerations

Direct substitutes include other ADPL44002 variants with different output voltages or packages, such as the ADPL44002ACPZN-R7 (LFCSP package). Ensure any replacement matches the 40V input rating, 200mA current capacity, and 20µVRMS noise specification. Verify pin compatibility and thermal resistance values before implementation.

FAQ

Can the fixed 3.3V output be adjusted to a higher voltage?

Yes, the fixed output voltage can be increased above the initial set point using an external resistor divider connected to the SENSE/ADJ pin.

How is the soft start time controlled?

The soft start time is determined by connecting an external capacitor to the SS pin; leaving the pin open results in a typical startup time of 400µs.

What is the minimum recommended output capacitance?

The device is stable with a minimum output capacitance of 2.2µF, provided the capacitor has an effective series resistance (ESR) of 0.3Ω or less.