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Microchip Technology MIC5235-3.0BM
- Part No.:
- MIC5235-3.0BM
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC5235-3.0BM.pdf
- Description:
- IC REG LINEAR 3V 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,940
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Product details
Overview
MIC5235-3.0BM from Micrel is a fixed 3.0 V, 150 mA ultra-low quiescent current LDO regulator in SOT-23-5 package, featuring 18 µA ground current at light load, 310 mV dropout at 150 mA, and ±2.0% output accuracy over –40°C to +125°C - deployed in USB power rails and battery-backed keep-alive supplies for portable computing.
For engineers reviewing the MIC5235-3.0BM datasheet, MIC5235-3.0BM pinout, MIC5235-3.0BM application, or MIC5235-3.0BM equivalent, key selection criteria include input voltage range (2.3–24 V), zero shutdown current, reverse battery protection, thermal shutdown, and µCap stability with 2.2 µF ceramic output capacitor.
Technical Context
The MIC5235-3.0BM implements a fixed-output linear regulation architecture with active-high enable control, internal 1.24 V reference, and integrated current limiting. Its µCap design eliminates need for high-ESR capacitors and ensures stability with low-ESR ceramic or tantalum output caps as small as 2.2 µF.
It operates across –40°C to +125°C junction temperature, supports up to 24 V input, and delivers regulated 3.0 V output with line regulation ≤0.04% and load regulation ≤1% across 100 µA–150 mA. Reverse polarity protection prevents damage during battery misconnection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±2.0% over full temperature and load range - ensures logic-level compatibility with 3.3 V I/O systems under worst-case drift. |
| Max Input Voltage | 24 V - enables direct regulation from multi-cell Li-ion (up to 3S) or automotive battery rails without pre-regulation. |
| Dropout Voltage | 310 mV at 150 mA - allows ≥3.31 V input to sustain 3.0 V output under full load, critical for low-voltage battery end-of-discharge operation. |
| Ground Current | 18 µA at 100 µA load - minimizes standby power loss in always-on circuits such as RTC or memory backup supplies. |
| Shutdown Current | ≤1 µA when EN ≤ 0.6 V - enables true zero-power disable state for system-level power gating. |
| Output Capacitor | 2.2 µF ceramic minimum - permits compact, low-profile designs using X7R/X5R dielectrics without oscillation risk. |
| Protection Features | Thermal shutdown, current limit, reverse battery, and reverse leakage protection - eliminates need for external protection circuitry in harsh environments. |
Pinout & Package
Package: IttyBitty™ SOT-23-5 (JEDEC MO-178AA), 2.80 × 1.75 × 1.30 mm, 5-pin surface-mount, θJA = 235°C/W on minimum footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.3–24 V DC; must be decoupled with ≥1.0 µF ceramic capacitor near pin. |
| 2 - GND | Power ground reference | Low-impedance return path for load and regulator ground current; ties to PCB ground plane. |
| 3 - EN | Enable control input | Active-high logic interface; <0.6 V disables regulator with <1 µA shutdown current; >2.0 V enables regulation. |
| 4 - NC | No-connect terminal | Internally unconnected; must remain floating - no external connection or pull-up/down required. |
| 5 - OUT | Regulated output | Delivers stable 3.0 V to load; requires ≥2.2 µF ceramic capacitor directly at pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| µCap stability | Stable with 2.2 µF ceramic or tantalum output cap - eliminates electrolytic bulk caps and reduces board area by >50% vs legacy LDOs. |
| Ultra-low ground current | 18 µA typical at light load - extends battery life in low-duty-cycle applications like sensor wake-up circuits. |
| Reverse battery protection | Withstands –15 V input without damage or reverse current flow - protects downstream circuitry during field-replaceable battery swaps. |
| Zero shutdown current | Sub-1 µA off-state current - enables reliable power-gating in energy-harvesting or coin-cell-powered systems. |
| High-accuracy output | ±2.0% over –40°C to +125°C - meets tight tolerance requirements for microcontroller core or memory I/O rails without external trimming. |
Applications
| USB Power Supply | Cellular Phone Baseband |
|---|---|
Use Scenario: Providing clean 3.0 V rail to USB peripheral ICs from variable 3.3–5.5 V host bus or battery source. IC Role / Device Role / Timing Role: Primary LDO regulator delivering stable VDD to USB transceivers and PHY layers. Use Value: 310 mV dropout ensures regulation down to 3.31 V input - maintains compliance during USB bus voltage sag or battery discharge. | Use Scenario: Powering baseband processor I/O banks during sleep mode with minimal leakage. IC Role / Device Role / Timing Role: Keep-alive supply for SRAM and real-time clock subsystems. Use Value: 18 µA ground current extends coin-cell or backup battery life beyond 5 years in always-on configurations. |
| Notebook Logic Supply | Automotive Body Control Module |
Use Scenario: Generating 3.0 V for chipset logic from 5–12 V main rail in ultra-thin notebooks. IC Role / Device Role / Timing Role: Secondary LDO for low-noise digital logic domains isolated from noisy switching supplies. Use Value: PSRR >50 dB at 1 kHz suppresses switching noise from adjacent DC/DC converters, preventing logic errors. | Use Scenario: Regulating 3.0 V for microcontroller peripherals in 12 V automotive battery environment with load dump transients. IC Role / Device Role / Timing Role: Protected LDO for CAN controller I/O and sensor interfaces. Use Value: 24 V max input rating and reverse battery protection eliminate need for external TVS or diode protection in cost-sensitive modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3002E/TO | 3.0 V fixed, 250 mA, 1.6 µA quiescent current, SOT-23-3 package - lacks EN pin and reverse battery protection. | Suitable for space-constrained, ultra-low-IQ applications where enable control and reverse protection are not required. | Select MCP1700-3002E/TO only if board layout prohibits 5-pin package and system design handles enable/shutdown externally. |
| TLS820B0L1EB/V56 | 3.0 V fixed, 200 mA, 35 µA quiescent current, AEC-Q100 qualified, integrated watchdog - higher IQ, wider temp range (–40°C to +150°C). | Targeted at automotive ASIL-B applications requiring functional safety features absent in MIC5235-3.0BM. | Choose TLS820B0L1EB/V56 only when AEC-Q100 qualification and watchdog functionality are mandatory for OEM compliance. |
Compared with MCP1700-3002E/TO and TLS820B0L1EB/V56, the MIC5235-3.0BM uniquely balances ultra-low 18 µA ground current, integrated enable, reverse battery protection, and SOT-23-5 footprint - making it optimal for portable industrial and consumer devices where protection, precision, and standby efficiency are co-prioritized.
Availability
MIC5235-3.0BM is available at Aetrix Electronics and suitable for USB power supply, cellular phone baseband, and notebook logic supply applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC5235-3.0BM 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
Micrel Inc. was a U.S.-based analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015; specialized in power management, timing, and interface ICs.
The MIC5235 product line delivers ultra-low-IQ LDOs for battery-critical portable and automotive applications - designed specifically for high-input-voltage, low-quiescent-current regulation with integrated protection.
FAQ
What is the maximum input voltage rating for MIC5235-3.0BM?
The MIC5235-3.0BM supports an absolute maximum input voltage of 38 V, but its recommended operating range is 2.3 V to 24 V. Exceeding 24 V may trigger internal protection or degrade reliability. The 24 V upper limit ensures safe operation with multi-cell Li-ion batteries and automotive 12 V systems under load dump conditions. Always observe derating guidelines per thermal calculations in the MIC5235-3.0BM datasheet.
Does MIC5235-3.0BM require an external resistor network for 3.0 V output?
No, MIC5235-3.0BM is a fixed-output variant - its 3.0 V regulation is achieved internally without external resistors. Only the adjustable version (MIC5235BM5) requires R1/R2 feedback. The MIC5235-3.0BM uses an internal voltage divider tied to a 1.24 V reference, eliminating layout complexity and component count for standard 3.0 V applications.
Can MIC5235-3.0BM operate without an output capacitor?
No, MIC5235-3.0BM requires a minimum 2.2 µF ceramic output capacitor for stability - operation without it risks oscillation or regulation failure. The device's µCap architecture is optimized for low-ESR ceramics; tantalum caps ≥2.2 µF are also acceptable. Zero-load stability is maintained only when the specified capacitor is present and properly placed adjacent to the OUT and GND pins.
What is the thermal shutdown threshold of MIC5235-3.0BM?
The MIC5235-3.0BM activates thermal shutdown at approximately 160°C junction temperature, with automatic recovery once TJ falls below ~140°C. This hysteresis prevents cycling near the trip point. The shutdown behavior is fully characterized across –40°C to +125°C ambient and is independent of input voltage or load. Thermal protection is intrinsic to the die and requires no external components.
Is MIC5235-3.0BM compatible with Y5V ceramic capacitors?
Y5V dielectrics are not recommended for MIC5235-3.0BM due to >60% capacitance loss over temperature - risking instability at cold or hot extremes. X7R or X5R ceramics are specified: they retain ≥85% of nominal value across –40°C to +125°C. If Y5V must be used, capacitance must be oversized significantly (e.g., ≥10 µF) to guarantee ≥2.2 µF minimum at all temperatures - but this compromises size, cost, and reliability.
MIC5235-3.0BM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 35 µA
- Current - Supply (Max):
- 4 mA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MIC5235-3.0BM FAQ
1.How can I place an order for MIC5235-3.0BM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5235-3.0BM 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 MIC5235-3.0BM reliable?
The price and inventory of MIC5235-3.0BM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5235-3.0BM is usually 5 days.
3.What payment methods are accepted for MIC5235-3.0BM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5235-3.0BM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5235-3.0BM?
MIC5235-3.0BM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5235-3.0BM 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 MIC5235-3.0BM?
For technical support, including MIC5235-3.0BM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5235-3.0BM requirements.
6.How does Aetrix verify that MIC5235-3.0BM is sourced from the original manufacturer or authorized distributors?
All MIC5235-3.0BM 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 MIC5235-3.0BM meets industry standards.
7.What is the process for return or replacement of MIC5235-3.0BM?
All MIC5235-3.0BM units undergo pre-shipment inspection (PSI). If there is an issue with MIC5235-3.0BM, 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 MIC5235-3.0BM part is unused and in its original packaging.
Return procedure for MIC5235-3.0BM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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