Is there a pin-compatible replacement for ADM7172ACPZ-3.3-R7?

The ADM7172ACPZ-R7 shares the same LFCSP-8 package and is likely pin-compatible, but this requires datasheet verification. The function of the ADJ pin differs from the fixed version, necessitating circuit modification.

What risks should I check before replacing ADM7172ACPZ-3.3-R7?

Key risks are electrical. Check if your design can accommodate external resistors for an adjustable LDO. If considering other parts, verify the lower output current (e.g., 1A or less) is sufficient for your application's maximum load.

ADM7172ACPZ-3.3-R7 Alternatives, Datasheet & Cross Reference | Analog Technologies, Inc.

Finding a substitute for the ADM7172ACPZ-3.3-R7, a 2A fixed 3.3V LDO, involves choosing between a functional alternate requiring modification or a downgrade with lower current.

AI replacement insight

Electrical riskmedium

Using an adjustable part requires adding resistors. Pin functions for ADJ pin will differ.

Package risklow

Several alternatives share the same LFCSP-8 package, simplifying physical replacement.

Sourcing riskhigh

Alternatives with lower current (e.g., 1A or 0.8A) are high-risk downgrades and may not be suitable.

Can it be replaced directly?

No direct drop-in replacement was found. The closest option, ADM7172ACPZ-R7, is functionally similar but requires circuit modification to set the output voltage.

Best replacement path

The ADM7172ACPZ-R7 is the most promising alternative. It is the adjustable version in the same product family, offering the same 2A current and package. This path requires adding external resistors to set the output voltage to 3.3V.

Main risk

The primary risk is electrical modification. Using an adjustable version requires adding external components, and other alternatives have significantly lower output current which may not support the application's load.

Recommended alternatives

Functional alternate with same 2A current and package, but requires external resistors for 3.3V output.

View details

Alternative comparison matrix

Feature / factor	ADM7172ACPZ-3.3-R7	ADM7172ACPZ-R7	ADM7171ACPZ-R7	ADM7150ACPZ-3.3-R7	Compatibility / risk
Topology	Fixed 3.3V	Adjustable	Adjustable	-	Adjustable — Requires external resistors to set output to 3.3V.; ADM7171ACPZ-R7: Requires external resistors to set output to 3.3V.
Output Current A	2.0 A	2.0 A	1.0 A	0.8 A	2.0 A / 1.0 A / 0.8 A — matched; ADM7171ACPZ-R7: 50% lower than target's 2A.; ADM7150ACPZ-3.3-R7: Significantly lower than target's 2A.
Package	LFCSP-8	LFCSP-8	LFCSP-8	LFCSP-8	LFCSP-8 — matched; ADM7171ACPZ-R7: matched; ADM7150ACPZ-3.3-R7: matched
Input Voltage V	2.3 V to 6.5 V	2.3 V to 6.5 V	2.3 V to 6.5 V	4.5 V to 16 V	2.3 V to 6.5 V / 4.5 V to 16 V — matched; ADM7171ACPZ-R7: matched; ADM7150ACPZ-3.3-R7: Minimum input voltage is higher (4.5V vs 2.3V).
Output Voltage V	3.3 V	-	-	3.3 V	3.3 V — matched

Application & sourcing insights

Questions & answers

The best alternative is likely the ADM7172ACPZ-R7, the adjustable output version from the same family. It provides the same 2A current and package but requires external resistors to set the output to 3.3V.