ADP150AUJZ-3.3 Analog Devices Integrated Circuit (SOT23 (5-Pin)) In Stock
ADP150AUJZ-3.3 is an ultra-low noise 150 mA LDO linear regulator from Analog Devices with a fixed 3.3 V output, delivering only 9 µV RMS output noise for sensitive analog and RF circuits. It operates from 2.3 V to 5.5 V input in a compact 5-pin SOT-23 package with 0.125% load regulation. Available worldwide in lead-free packaging for portable and IoT applications.
- Manufacturer
- Analog Devices
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- ADP150AUJZ-3.3 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3256(MOQ 570)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low output noise of 9 µV RMS (10 Hz to 100 kHz) makes ADP150AUJZ-3.3 ideal for noise-sensitive RF, ADC reference, and PLL supply rails requiring clean 3.3 V regulation
- 150 mA output current from a 2.3 V to 5.5 V input range in a 5-pin SOT-23 package with enable pin for power sequencing and sleep-mode current reduction
- Only 25 µA quiescent current at full load and 0.1 µA shutdown current maximise battery runtime in always-on wearable and IoT sensor designs
Applications
ADP150AUJZ-3.3 is ideal for powering RF front-end modules, Bluetooth and Wi-Fi chipsets, and ADC reference circuits in wearable and IoT devices where power-supply noise directly degrades receiver sensitivity or conversion accuracy. Its 9 µV RMS noise floor enables PLL and VCO supply filtering without external LC filters in compact 5-pin SOT-23 footprints. The wide 2.3 V to 5.5 V input range also suits battery-to-3.3 V regulation from a single Li-Ion cell or USB 5 V bus in portable medical monitors.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ADP150AUJZ-3.3:
Frequently Asked Questions
How does ADP150AUJZ-3.3's 9 µV RMS output noise compare to a standard LDO for an RF receiver supply rail?
ADP150AUJZ-3.3 specifies only 9 µV RMS noise integrated from 10 Hz to 100 kHz, compared to 50 µV to 100 µV RMS for typical general-purpose LDOs. For an RF receiver LNA supply at 3.3 V, a 9 µV noise floor contributes less than –90 dBm equivalent noise power into a 50 Ω system, well below typical LNA noise figures of 2 dB to 3 dB. This allows direct connection to the LNA supply pin without an external pi-filter LC network, saving 2 to 3 passive components per supply rail.
What is the minimum dropout voltage of ADP150AUJZ-3.3 and how does this affect operation from a partially discharged Li-Ion cell?
ADP150AUJZ-3.3 has a typical dropout voltage of 200 mV at 150 mA output current. A Li-Ion cell discharged to 3.5 V provides an input headroom of 200 mV above the 3.3 V output, allowing the LDO to maintain regulation down to approximately 3.5 V battery terminal voltage. Since Li-Ion cells are typically considered depleted at 3.0 V, the regulator remains in regulation for the majority of the usable battery discharge curve, maximising energy extraction from a 1-cell Li-Ion battery pack without a boost converter.
For a design with a 5 V USB input and a 3.3 V ADC supply, what is the power dissipation of ADP150AUJZ-3.3 at 100 mA load?
At 5 V input, 3.3 V output, and 100 mA load, the voltage drop across ADP150AUJZ-3.3 is 1.7 V, giving a power dissipation of 1.7 V × 100 mA = 170 mW. The 5-pin SOT-23 package has a thermal resistance of approximately 250°C/W junction-to-ambient, resulting in a junction temperature rise of 170 mW × 250°C/W = 42.5°C above ambient. In a 25°C environment this gives a junction temperature of 67.5°C, well within the 125°C maximum rating and requiring no heatsink or airflow for safe continuous operation.
When should a designer choose ADP150AUJZ-3.3 over an adjustable LDO for a Bluetooth 5.0 module power supply?
ADP150AUJZ-3.3's fixed 3.3 V output requires no external resistor divider, eliminating 2 resistors and their associated noise injection and tolerance stack-up (typically ±1% per resistor). For a Bluetooth 5.0 module with a specified 3.0 V to 3.6 V supply range and 80 mA peak current during RF bursts, the fixed output accuracy of ±2% (3.234 V to 3.366 V) keeps the supply inside the module's window without calibration. The 5-pin SOT-23 also has a smaller footprint than 8-pin adjustable LDOs, saving approximately 10 mm² on a Bluetooth wearable PCB.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
More from Analog Devices
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 570+ | $0.3521 | $200.70 |
| 740+ | $0.3388 | $250.71 |
| 925+ | $0.3256 | $301.18 |
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