ADP7118AUJZ-1.8-R7

Overview

The ADP7118AUJZ-1.8-R7 is a CMOS low dropout linear regulator manufactured by Analog Devices Inc., housed in a TSOT-23-5 surface-mount package. It provides a fixed output voltage of 1.8 V with a maximum continuous output current of 200 mA. The device operates from an input voltage range of 2.7 V to 20 V and features ultralow output noise of 11 µV rms across the 10 Hz to 100 kHz bandwidth. Power supply rejection ratio (PSRR) reaches 88 dB at 10 kHz, 68 dB at 100 kHz, and 50 dB at 1 MHz. Quiescent current is typically 50 µA at no load and rises to 180 µA at full load. Dropout voltage is specified as 200 mV typical at 200 mA. Initial output accuracy is ±0.8% at 25°C.

Feature Summary

• Ultralow output noise performance independent of fixed output voltage options
• High power supply rejection ratio across wide frequency spectrum
• Precision enable pin with programmable logic thresholds and hysteresis
• Stable operation with small ceramic output capacitors

Applications

• Regulation for noise-sensitive analog circuits
• Powering ADC and DAC circuits
• Supplying precision amplifiers
• Providing power for VCO VTUNE control
• Communications and infrastructure systems

Procurement Notes

Verify that the specific suffix -R7 corresponds to the reel packaging format required for automated assembly processes. Confirm the fixed 1.8 V output specification matches the target circuit design requirements. Ensure the TSOT-23-5 package dimensions align with the PCB footprint constraints. Check for any automotive qualification markings if the application requires AEC-Q100 compliance standards.

Selection Notes

Select this component when high PSRR and minimal output noise are critical for signal integrity in mixed-signal designs. The 200 mA current capability supports moderate load requirements while maintaining efficiency through low quiescent current consumption. The wide input voltage range allows compatibility with various upstream power sources. Verify thermal dissipation capabilities within the TSOT-23-5 package for the expected ambient temperature conditions.

Part Context

This part belongs to the ADP7118 family of low noise CMOS LDO regulators. The family offers multiple fixed output voltage options ranging from 1.2 V to 5.0 V, alongside adjustable variants. Other package options include 6-lead LFCSP and 8-lead SOIC, which provide user-programmable soft start functionality not available in the TSOT-23-5 configuration. The series is designed for portable equipment and high-performance analog applications.

Replacement Considerations

ADP7118AUJZ-R7 (Adjustable Output Version)

FAQ

Can the fixed 1.8 V output be adjusted higher?

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

Is soft start functionality available in the TSOT-23-5 package?

No, user-programmable soft start via an external capacitor is only available in the LFCSP and SOIC packages. The TSOT-23-5 package utilizes an internal soft start mechanism.

What is the minimum recommended output capacitance?

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