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Updated at 14/07/2025 10:30:15(UTC+8)
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Description
- Product Details
- The ADP7105 is a CMOS, low dropout (LDO) linear regulator that operates from 3.3 V to 20 V and provides up to 500 mA of output current. This high input voltage LDO is ideal for regula-tion of high performance analog and mixed-signal circuits operating from 1.22 V to 19 V rails. Using an advanced proprietary architecture, the ADP7105 provides high power supply rejection and low noise, and achieves excellent line and load transient response with only a small 1 μF ceramic output capacitor.
- The ADP7105 is available in three fixed output voltage options and an adjustable version that allows output voltages ranging from 1.22 V to 19 V via an external feedback divider. The ADP7105 allows an external soft start capacitor to be connected to program the startup.
- Note that throughout this data sheet, the sense function (SENSE) of the SENSE/ADJ pin applies to fixed output voltage models only, whereas the adjust input function (ADJ) applies to adjustable output voltage models only. For example, Figure 1 shows the sense function, and Figure 2 shows the adjust input function.
- The ADP7105 output noise voltage is 15 μV rms and is inde-pendent of the output voltage. A digital power-good output allows power system monitors to check the health of the output voltage. A user programmable precision undervoltage lockout function facilitates sequencing of multiple power supplies.
- The ADP7105 is available in 8-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages. The LFCSP offers a very compact solution and provides excellent thermal performance for applications that require up to 500 mA of output current in a small, low profile footprint.
- **APPLICATIONS**
- Regulation of noise sensitive applications:
- ADC and DAC circuits, precision amplifiers,
- high frequency oscillators, clocks, and PLLs
- Communications and infrastructure
- Medical and healthcare
- Industrial and instrumentation
- ### Features and Benefits
- Input voltage range: 3.3 V to 20 V
- Maximum output current: 500 mA
- Low noise: 15 μV rms for fixed output versions
- PSRR performance of 60 dB at
- 10 kHz, VOUT = 3.3 V
- Reverse current protection
- Low dropout voltage: 350 mV at
- 500 mA
- Initial accuracy: ±0.8%
- Accuracy over line, load, and temperature: −2% to +1%
- Low quiescent current: 900 μA at
- VIN = 10 V, IOUT = 500 mA
- Low shutdown current: <50 μA at
- VIN = 12 V, stable with small 1 μF ceramic output capacitor
- 3 fixed output voltage options:
- 1.8, 3.3 V and 5 V
- See datasheet for additional features
ADP7105 Specifications
| Attribute | Attribute Value |
|---|---|
| Datasheet | Datasheet |
| 3D Model | 3D Model |
| Show | |
| Product Lifecycle Status | Recommended for New Designs |
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