MIC2594-1BM Hot Swap Controller Equivalent & Substitute Parts

Part Overview

The MIC2594-1BM is a single-channel hot swap controller designed for -48V applications, manufactured by Microchip Technology. This component is discontinued at DiGi Electronics and no longer in active production. The device provides fault timeout and latched fault protection with programmable current limit, slew rate, and UVLO (Under-Voltage Lock-Out) functionality in an 8-SOIC surface mount package.

Due to the discontinued status of the MIC2594-1BM, identifying functionally equivalent alternatives is essential for system redesign, board refresh, or long-term supply chain planning in -48V hot swap applications.

Substiute Parts

MIC2594-1BM

Microchip TechnologyIn Stock: 3277MIC2594-1BM Datasheet

Current PartRFQ

MAX5920BESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1173MAX5920BESA+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC2594-1BM is determined by the following critical parameters:

• Package Compatibility: 8-SOIC form factor (0.154", 3.90mm Width) for direct PCB layout compatibility
• Voltage Application: -48V operation with supply range spanning -80V to -19V minimum
• Channel Configuration: Single-channel hot swap control architecture
• Core Features: Fault timeout and latched fault protection as baseline requirements
• Temperature Range: -40°C to 85°C operating specification
• Mounting Type: Surface mount technology

The MAX5920BESA+ meets all substitution criteria within these parameters. Both devices share identical package geometry, voltage specifications, single-channel topology, and core protective features required for -48V hot swap applications.

Parameter Comparison

Engineering Selection Recommendations

The MAX5920BESA+ is the direct functional equivalent for the discontinued MIC2594-1BM in -48V hot swap controller applications. Selection should be based on the following factors:

Product Status: The MIC2594-1BM is discontinued and no longer supported by the manufacturer. The MAX5920BESA+ is in active production status, ensuring long-term availability and ongoing technical support.

Compliance & Certifications: The MAX5920BESA+ achieves ROHS3 compliance, whereas the MIC2594-1BM is RoHS non-compliant. For applications subject to RoHS regulations or environmental compliance requirements, the MAX5920BESA+ is the appropriate choice.

Electrical Compatibility: Both devices operate within the -48V application space with compatible supply voltage ranges (-80V to -19V for MIC2594-1BM; -80V to -20V for MAX5920BESA+). The MAX5920BESA+ includes additional programmable features (Circuit Breaker, OVP) and thermal limit protection beyond the baseline MIC2594-1BM specification.

Supply Current Consideration: The MAX5920BESA+ operates at 700 µA supply current compared to 3 mA for the MIC2594-1BM. This lower quiescent current may provide power efficiency benefits in battery-backed or low-power -48V systems.

Package & Mechanical Fit: Both devices use identical 8-SOIC packaging, enabling direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the MAX5920BESA+ be used as a direct replacement for the MIC2594-1BM without PCB modifications?

A: Yes. Both devices share the identical 8-SOIC (0.154", 3.90mm Width) package footprint, allowing direct component substitution on existing PCB layouts without mechanical or electrical redesign.

Q: What are the key differences between these two hot swap controllers?

A: The primary differences are product status (MIC2594-1BM is discontinued; MAX5920BESA+ is active), RoHS compliance (MAX5920BESA+ is ROHS3 compliant), supply current (MAX5920BESA+ at 700 µA vs. MIC2594-1BM at 3 mA), and programmable feature set (MAX5920BESA+ includes Circuit Breaker and OVP functionality). Both devices meet the core -48V hot swap control requirements.

Q: Are the voltage supply ranges compatible between these parts?

A: Yes. The MIC2594-1BM operates at -80V to -19V, while the MAX5920BESA+ operates at -80V to -20V. The MAX5920BESA+ range fully encompasses the MIC2594-1BM specification with a 1V extension at the lower boundary.

Q: Does the MAX5920BESA+ provide the same fault protection features as the MIC2594-1BM?

A: The MAX5920BESA+ includes all baseline features of the MIC2594-1BM (Fault Timeout, Latched Fault) plus additional protection: Thermal Limit. Both devices support programmable Current Limit and UVLO. The MAX5920BESA+ adds Circuit Breaker and OVP (Over-Voltage Protection) capabilities.

Q: What is the impact of the lower supply current in the MAX5920BESA+?

A: The MAX5920BESA+ draws 700 µA compared to 3 mA for the MIC2594-1BM. This represents a 76% reduction in quiescent current, which may reduce overall system power consumption in -48V applications, particularly in battery-backed or standby-mode scenarios.

Q: Is the MAX5920BESA+ suitable for new designs?

A: Yes. The MAX5920BESA+ is in active production status with ROHS3 compliance, making it the appropriate choice for new product development in -48V hot swap applications. The MIC2594-1BM should not be used in new designs due to discontinued status.