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ADP7157ARDZ-03-R7
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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 1.2A 8SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.2V
- Voltage - Output (Max)：2.9V
- Voltage Dropout (Max)：0.17V @ 1.2A
- Current - Output：1.2A
- Current - Quiescent (Iq)：8 mA
- Current - Supply (Max)：12 mA
- PSRR：75dB ~ 55dB (1kHz ~ 1MHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Supplier Device Package：8-SOIC-EP
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Overview
The ADP7157ARDZ-03-R7 is an adjustable linear regulator from Analog Devices, operating within a 2.3 V to 5.5 V input voltage range and delivering up to 1.2 A of output current. This specific model provides an output voltage range of 1.2 V to 2.9 V. It features ultralow noise characteristics, with typical output noise of 0.9 µV rms from 100 Hz to 100 kHz and a spectral density of 1.7 nV/√Hz from 10 kHz to 1 MHz. The device achieves high power supply rejection ratio (PSRR), reaching 75 dB from 1 kHz to 100 kHz at the specified conditions. It maintains excellent line and load transient response using only a 10 µF ceramic output capacitor.
Feature Summary
- Ultralow noise performance optimized for sensitive RF applications
- High power supply rejection ratio across wide frequency ranges
- Precision enable pin for controlled startup and shutdown
- Stable operation with small 10 µF ceramic output capacitors
Applications
- Phase-locked loops (PLLs)
- Voltage controlled oscillators (VCOs)
- Backhaul and microwave links
Procurement Notes
Verify the exact suffix -R7 indicates reel packaging when sourcing. Confirm the -03 designation matches the required 1.2 V to 2.9 V output range. Ensure the ARDZ package type aligns with PCB layout requirements. Cross-reference the manufacturer part number directly with official Analog Devices documentation to avoid counterfeit components.
Selection Notes
Select this variant specifically for applications requiring an output voltage ceiling of 2.9 V. Compare against other ADP7157 models if higher output voltages are needed. Consider thermal dissipation capabilities given the 1.2 A maximum load current. Verify that the input voltage headroom supports the desired dropout performance under full load conditions.
Part Context
This component belongs to the ADP7157 family of ultralow noise, high PSRR RF linear regulators. It shares architectural similarities with fixed-output variants like the ADP7158 and ADP7159, which offer 2 A current capability. The adjustable nature distinguishes it from these fixed versions while maintaining comparable noise and rejection specifications.
Replacement Considerations
Direct substitutes include other ADP7157 models with different output voltage ranges or current ratings. Adjacent families like ADM7151 offer similar functionality but differ in input voltage ranges and current capabilities.
