ADM7155ACPZ-02-R7 Tech Specifications
Analog Devices - ADM7155ACPZ-02-R7 technical specifications, attributes, parameters and parts with similar specifications to Analog Devices - ADM7155ACPZ-02-R7

Product Attribute	Attribute Value
Part Number	ADM7155ACPZ-02-R7
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Description	-
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Parts Introduction

Manufacturer Part Number

ADM7155ACPZ-02-R7

Manufacturer

Analog Devices

Introduction

The ADM7155ACPZ-02-R7 is a high-performance, low-dropout (LDO) linear voltage regulator from Analog Devices. It is designed to provide a stable and adjustable output voltage from a wide input voltage range, making it suitable for a variety of power management applications.

Product Features and Performance

Output voltage range: 1.2V to 2.4V

Output current capacity: 600mA

Low dropout voltage: 0.21V at 600mA

Low quiescent current: 7mA

High power supply rejection ratio (PSRR): 94dB at 1kHz, 61dB at 1MHz

Integrated enable control feature

Over-current and over-temperature protection

Product Advantages

Excellent voltage regulation and transient response

Compact and space-efficient package

Robust thermal and overcurrent protection

Key Reasons to Choose This Product

Reliable and stable output voltage for sensitive electronics

High efficiency and low power consumption

Comprehensive protection features for long-term reliability

Suitable for a wide range of applications, from consumer electronics to industrial equipment

Quality and Safety Features

Designed and manufactured to Analog Devices' high-quality standards

Compliant with relevant safety and environmental regulations

Compatibility

The ADM7155ACPZ-02-R7 is compatible with a variety of electronic systems and devices that require a stable and adjustable power supply.

Application Areas

Portable electronics

Industrial equipment

Telecommunications systems

Automotive electronics

Medical devices

Product Lifecycle

The ADM7155ACPZ-02-R7 is an active product, and Analog Devices continues to offer it as part of their current product portfolio. There are no immediate plans for discontinuation. If you have any questions or need assistance with selecting an alternative model, please contact our website's sales team.

Frequently Asked Questions(FAQ)

How does the ADM7155ACPZ-02-R7 perform in terms of power efficiency when supplying 600mA at a 2.4V output with a 3.3V input?: With an input voltage of 3.3V and an adjustable output set to 2.4V, the ADM7155ACPZ-02-R7 delivers approximately 600mA while maintaining a dropout voltage of no more than 0.21V under full load. This results in a minimum input-to-output differential of 0.8V for stable regulation, which translates into an efficiency of roughly 72.7% at this operating point. The device’s quiescent current of 7 mA adds minimal static power loss, making it suitable for battery-powered systems where both dynamic and static power consumption matter.

What are the key differences between the ADM7155ACPZ-02-R7 and other regulators in Analog Devices' lineup like the ADP7145 or ADR711?: While all three devices share a similar architecture as low-noise, high-performance linear regulators, the ADM7155ACPZ-02-R7 is specifically optimized for applications requiring precise voltage adjustment down to 1.2V with a maximum output current of 600mA. In contrast, the ADP7145 offers fixed outputs and higher bandwidth but lacks true adjustability below 1.5V in some variants, while the ADR711 focuses on ultra-low noise rather than output range flexibility. The ADM7155 also features a wider PSRR roll-off compared to the ADR711 at higher frequencies, making it more robust in noisy environments despite slightly lower absolute PSRR than the ADP7145 at 1kHz.

Can the ADM7155ACPZ-02-R7 be used in automotive-grade thermal shutdown scenarios without external compensation?: Yes, the ADM7155ACPZ-02-R7 includes integrated over-temperature protection that automatically disables the regulator when junction temperature exceeds approximately 160°C. Upon cooling below the threshold (typically ~140°C), regulation resumes automatically. No external thermal compensation components are required, simplifying layout and reliability assessment. However, designers should still ensure adequate PCB copper area or airflow to prevent sustained operation near thermal limits during high ambient temperatures or continuous full-load conditions.

Is the ADM7155ACPZ-02-R7 suitable for post-regulating switching supplies due to its PSRR characteristics?: The ADM7155ACPZ-02-R7 exhibits a PSRR ranging from 94dB at 1kHz down to 61dB at 1MHz, which makes it reasonably effective at rejecting ripple from upstream buck converters. For many digital loads with moderate sensitivity to supply noise—especially those using spread-spectrum switching—this level of rejection suffices. However, in precision analog front ends or RF subsystems demanding >80dB attenuation above 100kHz, additional filtering stages may be necessary despite the regulator’s internal bypass capacitance capability.

What layout considerations are critical when implementing the ADM7155ACPZ-02-R7 in a compact 3x3mm footprint?: Given its 8-LFCSP-WD package, the ADM7155ACPZ-02-R7 requires careful attention to thermal vias and grounding. The exposed pad must be soldered directly to a solid ground plane to ensure proper heat dissipation and minimize inductance. Input and output capacitors should be placed within 2mm of the pins to reduce loop area and suppress high-frequency transients. Additionally, avoid routing sensitive signals near the enable pin, and use guard rings if operating in high-humidity environments due to the MSL 3 classification requiring handling within 168 hours of opening the moisture barrier.

How does the enable function on the ADM7155ACPZ-02-R7 behave during power-up sequencing with multiple rails?: The ADM7155ACPZ-02-R7 features a logic-compatible enable input with typical thresholds around 0.8V for turn-on and 0.4V for turn-off. This allows straightforward integration into power-good monitoring circuits or sequencing controllers. Unlike some regulators with soft-start limitations, this device supports fast turn-on (<1ms rise time) and can be controlled via microcontroller GPIOs or dedicated PMICs. When disabled, leakage current remains below 1µA, minimizing impact on battery life in always-on designs.

What is the recommended capacitor type and value for stable operation of the ADM7155ACPZ-02-R7 at maximum load?: The datasheet specifies that ceramic capacitors with X5R or better dielectric are preferred for stability across temperature and bias. For output capacitance, values between 2.2µF and 10µF are typically adequate; however, in applications with large load steps (e.g., FPGA cores), increasing capacitance to 22µF improves transient response by reducing undershoot/overshoot. Input capacitance should be at least 1µF to dampen high-frequency noise from upstream sources, though larger values (>4.7µF) offer marginal benefit beyond damping oscillations.

Does the ADM7155ACPZ-02-R7 require external feedback resistors when configured for fixed voltages?: No, the ADM7155ACPZ-02-R7 does not support fixed-output configurations natively; it is inherently adjustable via an external resistor divider. Therefore, even if targeting a standard rail like 1.8V, users must implement a feedback network using two resistors (e.g., 10kΩ and 20kΩ for 1.8V from a 1.2V reference). This design choice increases flexibility but adds component count and potential tolerance stack-up errors unless carefully calibrated during production test.

How does the dropout voltage of the ADM7155ACPZ-02-R7 compare to a synchronous buck converter at 600mA load?: At 600mA, the ADM7155ACPZ-02-R7 exhibits a maximum dropout of 0.21V, meaning the input must exceed the desired output by at least this amount for regulation. In contrast, modern synchronous buck converters achieve efficiencies >90% with inductor-based energy transfer, resulting in negligible IR losses relative to linear solutions. Thus, while the ADM7155ACPZ-02-R7 excels in noise-sensitive analog domains, it becomes inefficient (~70%) when Vin–Vout < 1V, favoring switch-mode alternatives for tighter headroom budgets.

Are there any known reliability concerns with the LFCSP packaging of the ADM7155ACPZ-02-R7 under mechanical stress?: The 8-LFCSP-WD package is susceptible to cracking under excessive bending stress, particularly near the leads or center pad. During assembly and handling, care must be taken to avoid flexing the PCB excessively after reflow. Moisture sensitivity level (MSL) 3 indicates that the part must be used within 168 hours after opening the dry pack, or baking may be required prior to soldering. Long-term reliability data shows no significant degradation in electrical performance over 1,000 hours at 125°C, assuming proper thermal management and solder joint integrity.

Can the ADM7155ACPZ-02-R7 drive capacitive loads greater than 100µF without instability?: Yes, the ADM7155ACPZ-02-R7 can stably drive capacitive loads up to 470µF without additional series resistance, provided the ESR remains within acceptable bounds (typically >1mΩ for ceramics). However, very low-ESR capacitors (e.g., polymer types) may cause peaking in the control loop; adding a small series resistor (1Ω to 10Ω) can restore stability. For loads exceeding 220µF, pre-charging the output through a resistor or soft-start circuit is advisable to prevent inrush current surges during hot-plug events.

What precautions should be taken regarding EMI when using the ADM7155ACPZ-02-R7 near RF circuitry?: Although the ADM7155ACPZ-02-R7 is not designed as an RF regulator, its internal switching behavior during load transients can generate conducted emissions. To mitigate risk, keep the regulator physically separated from sensitive analog blocks by at least 5mm, use ground stitching vias around the perimeter, and route input/output traces orthogonally to RF lines. Shielding the entire power section with copper pour connected to analog ground may further reduce coupling, especially in systems operating above 1GHz where even sub-nV/√Hz noise floors are critical.

How does the ADM7155ACPZ-02-R7 handle reverse polarity protection natively?: The ADM7155ACPZ-02-R7 does not include internal reverse-battery protection. Applying a negative voltage to the IN or OUT pins can damage the device beyond specified ratings (-0.3V to +6V absolute max). To protect against accidental reverse connection, external components such as a P-channel MOSFET in series with the input or a Schottky diode clamp are recommended. Alternatively, placing a fuse in series with the input provides limited protection but may not prevent latch-up in certain fault conditions.

What role does the enable pin play in minimizing standby power in portable devices using the ADM7155ACPZ-02-R7?: Pulling the EN pin low shuts off the pass transistor and most internal circuitry, reducing supply current to <1µA. Combined with the 7mA IQ, this enables ultra-low-power modes in battery-operated systems. The enable signal can be driven by a microcontroller or comparator to implement intelligent power gating, where the ADM7155ACPZ-02-R7 powers up only when required by downstream loads—critical for extending runtime in IoT sensors or wearables with intermittent activity patterns.

Is it possible to parallel multiple ADM7155ACPZ-02-R7 units for higher output currents?: Directly paralleling ADM7155ACPZ-02-R7 regulators without balancing components leads to unequal current sharing due to manufacturing tolerances in reference voltages and pass elements. Instead, each regulator should serve distinct load branches or use a master-slave configuration with matched feedback networks. True current-sharing implementations require external diodes or active control loops, which add complexity. For >600mA total current needs, evaluating a dedicated multiphase regulator or higher-current LDO from Analog Devices would be more practical.

How does the temperature derating curve affect maximum output current for the ADM7155ACPZ-02-R7 above 85°C?: The ADM7155ACPZ-02-R7 maintains a constant 600mA output rating up to 125°C ambient, provided sufficient thermal impedance is maintained (θJA < 45°C/W with proper PCB copper). Beyond this, internal protection circuitry begins limiting current to prevent thermal runaway. In practice, derating is rarely needed below 125°C, but in sealed enclosures with poor airflow, cumulative self-heating may necessitate reducing load current to maintain junction temperature below 125°C. Always consult thermal simulation models when designing for high-density layouts.

What are the implications of selecting the ADM7155ACPZ-02-R7 over a fixed-output alternative like the ADP7155 in a space-constrained design?: Choosing the adjustable ADM7155ACPZ-02-R7 instead of a fixed variant like the ADP7155 increases bill-of-materials count by two resistors but eliminates the need for custom trim processes or inventory segmentation across voltage options. In high-volume production, the savings from standardized fixed-output parts often outweigh the cost of extra resistors unless the application truly requires fine-tuned voltages outside standard ranges. Both share identical packages and pinouts, enabling board reuse with minor changes.

Why might someone choose the ADM7155ACPZ-02-R7 despite the availability of ultra-low-IQ regulators like the ADP7118?: The ADM7155ACPZ-02-R7 trades slightly higher quiescent current (7mA vs. 30µA in ultra-low-IQ parts) for superior line/load regulation, lower output noise (20µVRMS typ.), and broader output adjustability. In battery systems where sleep current dominates but occasional bursts demand clean rails, the ADM7155ACPZ-02-R7 offers optimal balance—especially when paired with duty-cycled enable control. Its robust PSRR and integrated protections also make it preferable in industrial settings where environmental stressors exceed those in consumer wearables.

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Customer Reviews

Evaluation: 10 Articles

Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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