MIC2587-1BM Hot Swap Controller Equivalent & Substitute Parts

Part Overview

The MIC2587-1BM is a hot swap controller IC manufactured by Microchip Technology, designed for general-purpose power management applications. This single-channel device operates across a 10V to 80V supply range and features programmable current limiting, fault timeout, slew rate control, and under-voltage lockout (UVLO). The MIC2587-1BM is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	MIC2587-1BM
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Type	Hot Swap Controller
Number of Channels	1
Package / Case	8-SOIC (0.154", 3.90mm Width)
Voltage - Supply	10V ~ 80V
Operating Temperature	-40°C ~ 85°C
Current - Supply	2 mA
Programmable Features	Current Limit, Fault Timeout, Slew Rate, UVLO
Features	Latched Fault
Mounting Type	Surface Mount
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution for the MIC2587-1BM is determined by the following critical parameters:

Primary Substitution Criteria:

Single-channel hot swap controller architecture
8-SOIC surface mount package (0.154", 3.90mm width)
Latched fault feature
Programmable current limit, fault timeout, and UVLO functionality
Supply voltage range compatibility (minimum 10V operation required)
Operating temperature range (-40°C to 85°C preferred for industrial applications)

Substitute Categories:

Direct Microchip Equivalent: MIC2587-1YM maintains identical electrical specifications and packaging, with the primary difference being active product status and RoHS3 compliance.
Analog Devices LT1641 Series: Four variants (LT1641-1CS8#PBF, LT1641-1CS8#TRPBF, LT1641-1IS8#PBF, LT1641-1IS8#TRPBF) provide equivalent functionality with extended programmable features including OVP (Over-Voltage Protection). Supply voltage range begins at 9V, and temperature grades vary between 0°C to 70°C and -40°C to 85°C.
Analog Devices/Maxim MAX5933AESA+: Offers equivalent hot swap control with thermal limit feature and reduced supply current (1.4 mA vs. 2 mA). Supply voltage range is 33V to 80V, limiting applicability to higher voltage systems.

Parameter Comparison

Parameter	MIC2587-1BM	MIC2587-1YM	LT1641-1CS8#PBF	LT1641-1IS8#PBF	MAX5933AESA+
Manufacturer	Microchip	Microchip	Analog Devices	Analog Devices	Analog Devices/Maxim
Type	Hot Swap Controller	Hot Swap Controller	Hot Swap Controller	Hot Swap Controller	Hot Swap Controller
Channels	1	1	1	1	1
Package	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Voltage - Supply	10V ~ 80V	10V ~ 80V	9V ~ 80V	9V ~ 80V	33V ~ 80V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Current - Supply	2 mA	2 mA	2 mA	2 mA	1.4 mA
Latched Fault	Yes	Yes	Yes	Yes	Yes
Programmable Features	Current Limit, Fault Timeout, Slew Rate, UVLO	Current Limit, Fault Timeout, Slew Rate, UVLO	Current Limit, Fault Timeout, OVP, Slew Rate, UVLO	Current Limit, Fault Timeout, OVP, Slew Rate, UVLO	Current Limit, Fault Timeout, OVP, UVLO
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Preferred): MIC2587-1YM is the optimal substitute, offering identical electrical specifications, packaging, and pinout compatibility with the discontinued MIC2587-1BM. This part is currently in active production status with 55,468 units in stock and meets ROHS3 compliance requirements.

For Extended Temperature Range Applications: LT1641-1IS8#PBF and LT1641-1IS8#TRPBF (Analog Devices) maintain the full -40°C to 85°C operating temperature range while adding OVP functionality. These parts operate across 9V to 80V, providing compatibility with lower voltage systems. Available in tube (PBF) and cut tape/Digi-Reel (TRPBF) packaging options.

For Commercial Temperature Range Applications: LT1641-1CS8#PBF and LT1641-1CS8#TRPBF are suitable for 0°C to 70°C environments and offer the same extended programmable features as the industrial-grade variants.

For High-Voltage Systems (33V Minimum): MAX5933AESA+ provides equivalent hot swap control with reduced quiescent current (1.4 mA) and integrated thermal limiting. This part is restricted to 33V to 80V supply range and is not suitable for applications requiring operation below 33V.

Compliance Considerations: All active substitute parts meet ROHS3 compliance and REACH unaffected status. The discontinued MIC2587-1BM is RoHS non-compliant; migration to compliant alternatives is recommended for new designs and ongoing production.

Frequently Asked Questions (FAQ)

Q: Can MIC2587-1YM be used as a direct drop-in replacement for MIC2587-1BM? A: Yes. MIC2587-1YM shares identical electrical specifications, package type (8-SOIC), pinout, and functional features. The primary differences are active product status and RoHS3 compliance.

Q: What is the key difference between Microchip MIC2587 and Analog Devices LT1641 variants? A: The LT1641 series adds Over-Voltage Protection (OVP) as a programmable feature, which the MIC2587 does not include. Both maintain equivalent current limiting, fault timeout, slew rate, and UVLO functionality. The LT1641 minimum supply voltage is 9V versus 10V for MIC2587.

Q: Are the LT1641 variants interchangeable with each other? A: LT1641 variants differ in temperature grade and packaging format. LT1641-1CS8 operates 0°C to 70°C (commercial), while LT1641-1IS8 operates -40°C to 85°C (industrial). The #PBF suffix indicates tube packaging; #TRPBF indicates tape & reel or cut tape packaging. Electrical performance is identical across variants.

Q: Why is MAX5933AESA+ not recommended as a primary substitute? A: MAX5933AESA+ has a minimum supply voltage of 33V, making it incompatible with applications requiring operation below 33V. The MIC2587-1BM operates from 10V, providing broader voltage range coverage. MAX5933AESA+ is suitable only for dedicated high-voltage systems.

Q: What packaging options are available for substitute parts? A: All substitute parts use 8-SOIC surface mount packages. Microchip variants (MIC2587-1YM) and Analog Devices LT1641-1CS8#PBF come in tube packaging. LT1641-1CS8#TRPBF, LT1641-1IS8#PBF, and LT1641-1IS8#TRPBF offer tape & reel or cut tape options for automated assembly.

Q: Is RoHS compliance a critical factor for substitution? A: For new designs and production environments subject to RoHS regulations, compliance is mandatory. All active substitute parts meet ROHS3 requirements. The discontinued MIC2587-1BM is RoHS non-compliant and should not be specified for new applications.

Q: Can I use LT1641 in a design originally specified for MIC2587-1BM? A: Yes, with design review. LT1641 variants are functionally equivalent and pin-compatible. The extended OVP feature provides additional protection. Verify that the 9V minimum supply voltage (versus 10V for MIC2587) and temperature grade match your application requirements.

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