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ADP7157ACPZ-04-R7
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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 1.2A 10LFCSP
- 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)：3.3V
- Voltage Dropout (Max)：0.17V @ 1.2A
- Current - Output：1.2A
- Current - Quiescent (Iq)：8 mA
- Current - Supply (Max)：12 mA
- PSRR：82dB ~ 55dB (1kHz ~ 1MHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：10-VFDFN Exposed Pad, CSP
- Supplier Device Package：10-LFCSP-WD (3x3)
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Overview
The ADP7157ACPZ-04-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. It provides an adjustable output voltage between 1.2 V and 3.3 V with high precision. The device features ultralow noise characteristics, including 0.9 µV rms typical output noise from 100 Hz to 100 kHz and 1.7 nV/√Hz spectral density from 10 kHz to 1 MHz. It achieves a power supply rejection ratio (PSRR) of 82 dB from 1 kHz to 100 kHz and 55 dB at 1 MHz under specified conditions. Dropout voltage is typically 120 mV at full load. The component is housed in a 10-lead, 3 mm × 3 mm LFCSP package.
Feature Summary
- Ultralow noise performance optimized for sensitive RF applications
- High power supply rejection ratio across wide frequency ranges
- Precision enable control with low shutdown current consumption
- Stable operation with small ceramic output capacitors
Applications
- Phase-locked loops (PLLs)
- Voltage controlled oscillators (VCOs)
- Communications infrastructure systems
- Backhaul and microwave links
Procurement Notes
Verify the specific suffix -04-R7 against official documentation to confirm the fixed maximum output voltage configuration and reel packaging format. Ensure compatibility with the required input voltage headroom for optimal PSRR performance. Confirm thermal requirements for the LFCSP package in your specific PCB layout environment.
Selection Notes
Select this model when the application requires an adjustable output up to 3.3 V with minimal noise contribution. Consider the 10-lead LFCSP package for compact designs requiring efficient heat dissipation. Evaluate the input-to-output voltage differential to ensure dropout specifications are met under maximum load conditions.
Part Context
This component belongs to the ADP7157 family of ultralow noise linear regulators designed for radio frequency applications. It shares architectural similarities with other models in the series that offer different fixed or adjustable output voltage options and varying current capabilities. The family targets high-performance analog and mixed-signal circuits requiring clean power supplies.
Replacement Considerations
ADP7157ACPZ-03-R7
FAQ
What is the minimum recommended output capacitor value?
A minimum of 10 µF ceramic capacitor is recommended for stable operation.
How does the BYP pin affect noise performance?
Connecting a bypass capacitor to the BYP pin reduces output noise; typical values range from 1 µF to larger capacitances depending on specific noise requirements.
