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Microchip Technology MIC5235-3.0BM TR
- Part No.:
- MIC5235-3.0BM TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC5235-3.0BM TR.pdf
- Description:
- IC REG LINEAR 3V 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,988
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Product details
Overview
MIC5235-3.0BM TR 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 100 µA 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 TR datasheet, MIC5235-3.0BM TR pinout, MIC5235-3.0BM TR application, or MIC5235-3.0BM TR equivalent, key selection criteria include input voltage range (2.3–24 V), zero shutdown current, reverse battery protection, µCap stability with 2.2 µF ceramic output capacitor, and thermal shutdown behavior under sustained 150 mA load.
Technical Context
The MIC5235-3.0BM TR implements a micropower bandgap reference and PNP pass transistor architecture enabling stable regulation across wide input voltages while maintaining ultra-low ground current. Its enable logic is active-high with 0.6 V low threshold and 2.0 V high threshold, supporting precise system-level power sequencing.
It operates as a fixed-output LDO with no external feedback components required - pin 4 is NC (not ADJ), distinguishing it from the adjustable MIC5235BM5 variant. Stability is guaranteed with ≥2.2 µF ceramic or tantalum output capacitors and ESR ≤3 Ω, eliminating need for electrolytic or polymer types.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±2.0% over –40°C to +125°C - ensures reliable logic supply for 3.3 V I/O domains with margin. |
| Max Input Voltage | 24 V - supports direct connection to 3-cell Li-ion (12.6 V) or automotive 12 V systems with headroom. |
| Dropout Voltage | 310 mV at 150 mA - enables regulation down to VIN = 3.31 V, critical for battery end-of-discharge operation. |
| Ground Current | 18 µA at 100 µA load - minimizes battery drain in always-on keep-alive circuits (e.g., RTC/CMOS RAM). |
| Shutdown Current | ≤1 µA at VEN ≤ 0.6 V - enables true zero-power disable for energy harvesting or wake-on-event designs. |
| Output Capacitor | 2.2 µF ceramic minimum - allows use of small, low-profile X7R/X5R MLCCs without stability risk. |
| Protection Features | Reverse battery protection, reverse leakage protection, thermal shutdown, and current limit - eliminates need for external diodes or fuses. |
Pinout & Package
SOT-23-5 (IttyBitty™) package: 2.80 mm × 1.75 mm × 1.30 mm body, 0.95 mm pitch, thermally enhanced pad-less footprint per Micrel M5 drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Supply Input | Accepts 2.3–24 V DC; must be decoupled with ≥1.0 µF ceramic capacitor near pin. |
| 2 - GND | Ground Reference | Primary return path for load current and internal bias; connects to low-impedance PCB ground plane. |
| 3 - EN | Enable Input | Active-high logic control: <0.6 V disables regulator (≤1 µA shutdown current); >2.0 V enables output. |
| 4 - NC | No Connect | Internally unconnected; must remain floating - not tied to GND, VOUT, or any other node. |
| 5 - OUT | Regulated Output | Delivers stable 3.0 V to load; requires ≥2.2 µF ceramic capacitor with ESR ≤3 Ω for stability. |
Key Features
| Feature | Design Value |
|---|---|
| µCap stability | Guaranteed stable with 2.2 µF ceramic or tantalum output capacitor - eliminates need for large, costly electrolytics. |
| Ultra-low ground current | 18 µA typical at light load - extends battery life in always-on applications such as real-time clocks and memory backup. |
| Reverse battery protection | Withstands –15 V input without damage or reverse current flow - protects circuitry during battery insertion error. |
| Zero shutdown current | Ground current drops to ≤1 µA when EN is low - enables true off-state in energy-constrained systems. |
| Thermal shutdown | Activates at ~150°C junction temperature and auto-recovers on cooldown - prevents permanent damage during overload or poor heatsinking. |
Applications
| USB Power Supply | Cellular Phone Baseband |
|---|---|
Use Scenario: Providing clean 3.0 V rail to USB peripheral ICs from 5 V USB bus or single-cell Li-ion battery. IC Role / Device Role / Timing Role: Fixed-output LDO delivering regulated 3.0 V with low noise and fast transient response for USB PHY and controller logic. Use Value: 310 mV dropout enables full USB 5 V → 3.0 V conversion even at low input voltage; 18 µA quiescent current minimizes standby drain. |
Use Scenario: Powering baseband processor I/O banks and RF front-end bias circuits in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-noise, enable-controlled LDO supplying 3.0 V to digital core and analog subsystems during active and sleep modes. Use Value: Active-high EN allows synchronized power-up with PMIC sequencing; reverse battery protection guards against field-replaceable battery misinsertion. |
| Keep-Alive Supply | Automotive Body Control Module |
Use Scenario: Maintaining voltage to CMOS RAM and RTC during main system power-off in notebooks and PDAs. IC Role / Device Role / Timing Role: Always-on LDO operating from coin cell or supercapacitor backup source, delivering 3.0 V with no-load stability. Use Value: Stable regulation at zero load and 18 µA ground current maximize backup runtime - validated per Micrel's no-load stability specification. |
Use Scenario: Regulating 3.0 V for microcontroller peripherals and CAN transceiver logic in 12 V automotive systems. IC Role / Device Role / Timing Role: High-input-voltage LDO handling load dump transients up to 24 V while protecting downstream 3.3 V logic. Use Value: 24 V max input rating and thermal shutdown allow direct connection to vehicle battery without pre-regulation; reverse polarity protection adds fault resilience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/TT | 3.0 V fixed, 250 mA, 1.6 µA IQ, SOT-23-3 - no enable pin, no reverse protection, lower max input (6 V). | Not suitable for >6 V inputs or systems requiring reverse polarity hardening or enable control. | Select only for cost-sensitive, low-voltage (<6 V), always-on applications where enable and reverse protection are unnecessary. |
| Torex XC6206P302MR-G | 3.0 V fixed, 150 mA, 1 µA IQ, SOT-23-3 - no enable, no thermal shutdown, no reverse protection, 6 V max input. | Lacks safety features and high-voltage capability; limited to low-risk consumer electronics with stable <6 V sources. | Choose only when ultra-low IQ (<2 µA) is mandatory and all protection features can be implemented externally. |
Compared with MCP1700T-3002E/TT and XC6206P302MR-G, the MIC5235-3.0BM TR uniquely combines 24 V input tolerance, active enable, reverse battery protection, and thermal shutdown in a 5-pin SOT-23 - making it the only option among the three qualified for automotive, USB, and battery-reversal-prone portable designs.
Availability
MIC5235-3.0BM TR is available at Aetrix Electronics and suitable for USB power supply design, cellular phone baseband power, and keep-alive supply applications requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MIC5235-3.0BM TR 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 semiconductor company specializing in power management, analog, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC5235 product line delivers ultra-low-IQ LDOs optimized for battery-powered and high-input-voltage applications - targeting portable electronics, automotive subsystems, and always-on backup power where efficiency and fault resilience are critical.
FAQ
What is the maximum input voltage rating for the MIC5235-3.0BM TR?
The MIC5235-3.0BM TR supports an absolute maximum input voltage of 38 V, but its specified operating range is 2.3 V to 24 V. Operation above 24 V is outside guaranteed specifications and may compromise reliability or parametric performance. The 24 V upper limit ensures safe, validated operation across temperature and process corners per Micrel's datasheet.
Does the MIC5235-3.0BM TR require an external feedback resistor network?
No, the MIC5235-3.0BM TR is a fixed-output variant with internal feedback - pin 4 is NC (no connect), not ADJ. Unlike the adjustable MIC5235BM5, it delivers precisely 3.0 V without external resistors. This simplifies layout, reduces BOM count, and improves accuracy by eliminating resistor tolerance and drift effects.
Can the MIC5235-3.0BM TR operate with zero load current?
Yes, the MIC5235-3.0BM TR remains stable and in regulation with no load - a key feature confirmed in Micrel's Applications Information section. This makes it suitable for CMOS RAM keep-alive and RTC backup applications where output current may drop to 0 µA for extended periods without oscillation or dropout.
What output capacitor is required for stability with the MIC5235-3.0BM TR?
The MIC5235-3.0BM TR requires a minimum 2.2 µF ceramic or tantalum output capacitor with ESR ≤3 Ω. X7R or X5R dielectric MLCCs are recommended for temperature stability. Larger values improve transient response but are not required. Y5V or Z5U ceramics are discouraged unless derated significantly due to capacitance loss over temperature.
Is reverse battery protection active when the MIC5235-3.0BM TR is disabled via EN pin?
Yes, reverse battery protection remains fully functional regardless of EN state. Micrel specifies that the device withstands –15 V input with no reverse current flow and no damage, whether enabled or disabled. This ensures robustness during battery replacement or field servicing even when the regulator is powered down.
MIC5235-3.0BM TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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 TR FAQ
1.How can I place an order for MIC5235-3.0BM TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5235-3.0BM TR 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 TR reliable?
The price and inventory of MIC5235-3.0BM TR 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 TR is usually 5 days.
3.What payment methods are accepted for MIC5235-3.0BM TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5235-3.0BM TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5235-3.0BM TR?
MIC5235-3.0BM TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5235-3.0BM TR 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 TR?
For technical support, including MIC5235-3.0BM TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5235-3.0BM TR requirements.
6.How does Aetrix verify that MIC5235-3.0BM TR is sourced from the original manufacturer or authorized distributors?
All MIC5235-3.0BM TR 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 TR meets industry standards.
7.What is the process for return or replacement of MIC5235-3.0BM TR?
All MIC5235-3.0BM TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5235-3.0BM TR, 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 TR part is unused and in its original packaging.
Return procedure for MIC5235-3.0BM TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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