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Product Detailed Parameters
- Description：IC LNR REG CTRLR 1OUT 8SOIC
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Type：Positive Fixed
- Number of Outputs：1
- Current - Supply：2.7mA
- Voltage - Input：3V ~ 36V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Supplier Device Package：8-SOIC
- Package / Case：8-SOIC (0.154", 3.90mm Width)
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Overview
The MIC5156-5.0BM-TR is a Super LDO Regulator Controller manufactured by Microchip Technology in an 8-pin SOIC package. It provides a fixed 5.0V output with a supply voltage range of 3V to 36V and operates within a temperature range of -40°C to +85°C. The device requires an external N-channel MOSFET for regulation, utilizing an external gate drive supply (VP) rather than an internal charge pump. Key electrical characteristics include a typical operating current of 4.5mA, a shutdown current below 1µA, and a current limit threshold of 35mV across an external sense resistor.
Feature Summary
- Fixed 5.0V output configuration
- External gate drive supply requirement
- Internal gate-to-source protective clamp
- TTL-compatible enable control
Applications
- Ultrahigh current ultralow dropout voltage regulator
- Low parts count 5.0V to 3.3V computer supply
- High-current, current-limited switch
Procurement Notes
Verify the specific suffix 'BM' corresponds to the 8-pin SOIC package and industrial temperature rating (-40°C to +85°C). Confirm that the '-TR' designation indicates tape and reel packaging if required for automated assembly processes. Ensure the component matches the original Micrel datasheet specifications as acquired through Microchip Technology channels.
Selection Notes
Select this controller when a fixed 5.0V output is required without the need for an internal charge pump. This model necessitates an external VP pin connection for gate drive, distinguishing it from MIC5157/8 variants. It is suitable for applications where external gate drive supplies are already available or designed into the system architecture.
Part Context
This component belongs to the MIC5156 family of Super LDO Regulator Controllers. Unlike the MIC5157 and MIC5158 models which feature internal charge pumps, the MIC5156 relies on an external voltage source at the VP pin to drive the external MOSFET gate. The family supports high-current linear regulation using external pass elements.
Replacement Considerations
MIC5156-5.0YM is the lead-free equivalent in the same SOIC package.
FAQ
Does the MIC5156-5.0BM-TR have an internal charge pump?
No, the MIC5156 requires an external gate drive supply connected to the VP pin.
How is current limiting implemented?
Current limiting is achieved by placing an external sense resistor between VDD and the Drain pin; the controller limits current when the voltage drop reaches 35mV.
