Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Input voltage | 4.5 V to 16 V |
| Fixed output | 3.3 V |
| Maximum load current | 800 mA |
| Integrated noise | 1.0 µV rms, 100 Hz to 100 kHz |
| Noise density | 1.7 nV/√Hz typical, 10 kHz to 1 MHz |
| Accuracy | ±2% over line, load, and temperature |
| Output capacitor | 10 µF ceramic |
| Package | 8-lead LFCSP_WD, CP-8-11 |
| Operating temperature | −40°C to +125°C |
Product Overview
ADM7150ACPZ-3.3-R7 is the fixed 3.3 V LFCSP version of the ADM7150 800 mA low-noise regulator. It accepts 4.5 V to 16 V and targets analog/RF rails where very low integrated noise and strong rejection of upstream ripple are primary selection requirements.
For fixed-output versions, the datasheet specifies 1.0 µV rms integrated noise from 100 Hz to 100 kHz and 1.7 nV/√Hz typical noise density from 10 kHz to 1 MHz. The exact 3.3 V order code avoids an external feedback divider for setting the output voltage.
Key Features
- Fixed 3.3 V output with up to 800 mA load current.
- 4.5 V to 16 V input range.
- 1.0 µV rms integrated noise for fixed-output versions.
- Stable with a 10 µF ceramic output capacitor.
Functional Highlights
The fixed 3.3 V suffix is an electrical characteristic, not only a packaging suffix.
Low-noise results depend on implementation: BYP/REF/VREG capacitors, grounding, capacitor placement, and exposed-pad thermal connection all affect real board performance.
Application Fit
- PLL and VCO supply regulation.
- Noise-sensitive analog and RF circuits.
- Communications infrastructure.
- DAC-driver and instrumentation supply rails.
Design Considerations
- Confirm sufficient input headroom above the fixed 3.3 V output at the required current.
- Calculate power dissipation at the actual VIN and load current.
- Use the recommended 10 µF ceramic output capacitor and reference/bypass components.
- Connect the exposed pad and local ground plane for both thermal and low-noise performance.
Product Status
Manufacturer status: RECOMMENDED FOR NEW DESIGNS
Analog Devices currently marks ADM7150 RECOMMENDED FOR NEW DESIGNS and lists the exact 3.3 V model in its model table.
Related Engineering Resources
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