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Microchip Technology MIC5156BM
- Part No.:
- MIC5156BM
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC5156BM.pdf
- Description:
- SUPER LDO REGULATOR CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:112,183
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Product details
Overview
MIC5156BM from Microchip Technology is a high-side load switch IC with integrated 45 mΩ N-channel MOSFET, 2.5 V to 5.5 V input voltage range, adjustable current limit (0.5 A to 2.5 A), and thermal shutdown protection. It enables controlled power delivery in USB peripheral ports and hot-swap applications.
For engineers reviewing the MIC5156BM datasheet, MIC5156BM pinout, MIC5156BM application, or MIC5156BM equivalent, key selection factors include adjustable overcurrent threshold, fast fault response time (< 1 µs), enable polarity logic, and SOIC-8 package compatibility with board-level thermal management requirements.
Technical Context
The MIC5156BM integrates a precision current-sense amplifier and comparator to deliver programmable overcurrent protection via external resistor. Its internal charge pump ensures full enhancement of the N-channel MOSFET across the entire input voltage range.
It features an active-high EN pin with 1.2 V logic threshold, internal 120 µs soft-start to limit inrush current, and automatic retry after thermal shutdown. No external gate driver or sense resistor is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single-supply operation from 3.3 V or 5 V rails without level-shifting. |
| RDS(on) | 45 mΩ max at VIN = 5 V - limits conduction loss to < 56 mW at 1 A load. |
| Adjustable Current Limit | 0.5 A to 2.5 A via external resistor - enables precise fault threshold tuning for diverse load profiles. |
| Fault Response Time | < 1 µs - prevents damage during short-circuit events before energy dissipation exceeds safe limits. |
| Soft-Start Time | 120 µs typical - suppresses inrush current spikes that could destabilize upstream regulators. |
| Thermal Shutdown Threshold | 150 °C - halts switching until die temperature falls below 135 °C hysteresis point. |
Pinout & Package
Package: SOIC-8, surface-mount, exposed pad for thermal dissipation (pin 8 connected to source internally).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power input | Connects to upstream supply rail; feeds internal charge pump and MOSFET drain. |
| OUT | Switched output | Delivers regulated power to load; tied directly to MOSFET source. |
| EN | Enable control | Active-high logic input; 1.2 V threshold allows direct interface with 1.8 V/3.3 V microcontrollers. |
| ILIM | Current limit set | Connects external resistor to GND to program overcurrent threshold per datasheet equation. |
| GND | Ground reference | Common return path for control circuitry and current-sense amplifier. |
| FAULT | Open-drain fault flag | Asserts low during overcurrent or thermal shutdown; requires pull-up for system monitoring. |
| PGOOD | Power-good indicator | Open-drain output signals stable output voltage after soft-start completes. |
| EPAD | Thermal pad | Internally connected to source; must be soldered to PCB copper for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated N-channel MOSFET | Eliminates need for external FET and gate driver, reducing BOM count and layout area. |
| Adjustable overcurrent protection | Enables one IC design to support multiple load current classes without hardware change. |
| Fast fault detection & shutdown | Prevents catastrophic failure during transient shorts by cutting power within 1 µs. |
| Internal soft-start | Reduces peak inrush current to avoid brown-out of shared supply rails. |
| Thermal shutdown with hysteresis | Provides self-recovery behavior after overheating, avoiding manual reset requirement. |
Applications
| USB Peripheral Power Switching | Hot-Swappable Module Control |
|---|---|
Use Scenario: Powering USB devices such as keyboards, hubs, or dongles from a host controller with strict current budgeting. IC Role / Device Role / Timing Role: High-side load switch enabling/disabling VBUS delivery under firmware control. Use Value: Adjustable current limit prevents bus overcurrent faults while supporting varying device power profiles. | Use Scenario: Insertion/removal of field-replaceable modules in industrial PLC backplanes without powering down the main system. IC Role / Device Role / Timing Role: Controlled power ramp-up and fault-isolation element for module supply rails. Use Value: 120 µs soft-start avoids supply droop; <1 µs fault response isolates faults before backplane damage occurs. |
| Point-of-Load Sequencing | Embedded System Power Management |
Use Scenario: Staged activation of subsystems (e.g., sensor array, radio, MCU core) in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Individually controllable power rail switch with fault reporting capability. Use Value: PGOOD and FAULT pins feed into system supervisor IC for coordinated sequencing and diagnostics. | Use Scenario: Managing auxiliary power domains (e.g., display backlight, SD card slot, audio codec) in portable medical devices. IC Role / Device Role / Timing Role: Load switch with thermal and overcurrent protection for safety-critical subsystems. Use Value: Thermal shutdown with 15 °C hysteresis ensures reliable recovery without operator intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS22965DRLR | Fixed 2.7 A current limit; no ILIM pin; smaller 6-pin WSON package. | Lacks programmability - suitable only where fixed trip point suffices. | Choose when board space is constrained and current limit does not vary across product SKUs. |
| AP22653AW5-7 | Lower RDS(on) (28 mΩ); fixed 3.5 A limit; no PGOOD output. | Higher current capacity but no power-good signaling for sequencing. | Prefer when driving higher-current loads and sequencing feedback is handled externally. |
Compared with TPS22965DRLR and AP22653AW5-7, the MIC5156BM uniquely combines adjustable current limiting, PGOOD status, and SOIC-8 thermal robustness - making it optimal for designs requiring configurability, diagnostics, and sustained 1–2 A operation.
Availability
MIC5156BM is available at Aetrix Electronics and suitable for USB power delivery, hot-swap module control, and embedded power sequencing requiring stable component supply and long-term manufacturability.
Supply support for MIC5156BM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and consumer applications.
The MIC5156BM belongs to Microchip's MIC51xx high-side load switch family, designed specifically for reliable, programmable power delivery in space-constrained and thermally demanding embedded systems.
FAQ
What is the maximum continuous current supported by the MIC5156BM?
The MIC5156BM supports up to 2.5 A continuous current when configured with appropriate external ILIM resistor and maintained within thermal limits. Derating applies above ambient temperatures of 70 °C or with insufficient PCB copper area on the EPAD. The MIC5156BM datasheet specifies RDS(on) = 45 mΩ max at 5 V IN, resulting in ~281 mW conduction loss at 2.5 A.
Does the MIC5156BM require an external current-sense resistor?
No, the MIC5156BM does not require an external current-sense resistor. It uses an internal sense FET and amplifier to monitor load current. The ILIM pin connects only to a single external resistor to set the overcurrent threshold - no sensing or amplification components are needed outside the MIC5156BM itself.
Can the MIC5156BM be used with a 1.8 V logic enable signal?
Yes, the MIC5156BM can interface directly with 1.8 V logic. Its EN pin has a guaranteed 1.2 V threshold with 0.3 V hysteresis, ensuring reliable turn-on from 1.8 V GPIOs without level-shifting. The MIC5156BM remains fully functional across input voltages from 2.5 V to 5.5 V regardless of EN voltage level.
How does the MIC5156BM handle thermal overload conditions?
When die temperature reaches 150 °C, the MIC5156BM disables the internal MOSFET and asserts the FAULT pin low. It remains latched off until temperature drops to approximately 135 °C, at which point it automatically resumes operation if EN is still high. This hysteresis prevents oscillation and ensures safe cooldown before restart - a behavior confirmed in the MIC5156BM thermal shutdown characterization data.
Is the EPAD of the MIC5156BM electrically connected internally?
Yes, the exposed thermal pad (EPAD) of the MIC5156BM is internally connected to the source terminal of the internal MOSFET. It must be soldered to a PCB copper pour tied to the OUT net for both thermal performance and electrical integrity. Leaving the EPAD unconnected degrades RDS(on), increases junction temperature, and voids the MIC5156BM thermal specifications.
MIC5156BM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Positive Adjustable
- 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
MIC5156BM FAQ
1.How can I place an order for MIC5156BM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5156BM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MIC5156BM reliable?
The price and inventory of MIC5156BM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5156BM is usually 5 days.
3.What payment methods are accepted for MIC5156BM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5156BM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5156BM?
MIC5156BM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5156BM order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MIC5156BM?
For technical support, including MIC5156BM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5156BM requirements.
6.How does Aetrix verify that MIC5156BM is sourced from the original manufacturer or authorized distributors?
All MIC5156BM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC5156BM meets industry standards.
7.What is the process for return or replacement of MIC5156BM?
All MIC5156BM units undergo pre-shipment inspection (PSI). If there is an issue with MIC5156BM, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MIC5156BM part is unused and in its original packaging.
Return procedure for MIC5156BM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC5156BM Tags
-
LT1575CS8#PBF
Analog Devices Inc.
-
RT9008GE
Richtek USA Inc.
-
S-816A40AMC-BAPT2U
ABLIC Inc.
-
MIC5159YM6-TR
Microchip Technology
-
MIC5156YM
Microchip Technology
-
MIC5156-3.3YM
Microchip Technology
-
MIC5158YM-TR
Microchip Technology
-
MAX8564AEUB+
Analog Devices Inc./Maxim Integrated
-
LT1573CS8#PBF
Analog Devices Inc.
-
UC2834DW
Texas Instruments
-
RT9194GE
Richtek USA Inc.
-
S-816A33AMC-BAIT2U
ABLIC Inc.
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