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Microchip Technology MIC5235BM
- Part No.:
- MIC5235BM
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC5235BM.pdf
- Description:
- IC REG LIN POS ADJ 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,432
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Product details
Overview
MIC5235BM from Micrel is an adjustable-output, ultra-low-quiescent-current LDO regulator delivering 150 mA with 310 mV dropout at full load, ±2.0% output accuracy over temperature, and stable operation with 2.2 µF ceramic output capacitors. It operates across 2.3 V to 24 V input and supports USB, portable electronics, and battery-powered systems using 1–3 cell Li-ion sources.
For engineers reviewing the MIC5235BM datasheet, MIC5235BM pinout, MIC5235BM application, or MIC5235BM equivalent, key selection criteria include its adjustable 1.24 V–20 V output range, 18 µA ground current at light load, reverse battery protection, thermal shutdown, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MIC5235BM implements a µCap LDO architecture optimized for stability with low-ESR ceramic or tantalum output capacitors-no minimum ESR requirement beyond 3 Ω. Its internal reference is 1.24 V, enabling precise external resistor-based voltage setting via the ADJ pin.
It features active-high enable control with zero shutdown current, reverse polarity input protection, and integrated current limiting (350–500 mA short-circuit) plus thermal shutdown. Ground current scales linearly with load: 18 µA at 100 µA output, rising to 4 mA at 150 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | Adjustable 1.24 V to 20 V via external resistive divider - enables single BOM for multiple rail voltages. |
| Max Output Current | 150 mA continuous - sufficient for logic supplies, USB peripherals, and low-power microcontrollers. |
| Dropout Voltage | 310 mV at 150 mA - supports regulation down to ~2.55 V input when set to 2.24 V output. |
| Ground Current | 18 µA at 100 µA load - minimizes battery drain in keep-alive and standby modes. |
| Output Accuracy | ±2.0% over –40°C to +125°C - ensures reliable logic-level compliance across automotive and industrial environments. |
| Input Voltage Range | 2.3 V to 24 V - accommodates wide battery chemistries and unregulated DC rails without pre-regulation. |
| Enable Threshold | VIL ≤ 0.6 V, VIH ≥ 2.0 V - compatible with 1.8 V, 3.3 V, and 5 V logic control signals. |
Pinout & Package
Package: IttyBitty™ SOT-23-5 (JEDEC MO-178AA), 2.80 mm × 1.75 mm × 1.30 mm body, 0.95 mm pitch, –40°C to +125°C junction temperature rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Supply Input | Accepts 2.3 V–24 V unregulated input; requires ≥1.0 µF ceramic bypass capacitor near pin. |
| 2 - GND | Ground Reference | Power and signal return path; must be low-impedance connection to minimize noise and dropout error. |
| 3 - EN | Enable Input | Active-high logic control; <0.6 V disables regulator with <1 µA shutdown current; ≥2.0 V enables regulation. |
| 4 - ADJ | Feedback Input | Connects to resistor divider (R1/R2); sets output as VOUT = 1.24 V × (1 + R1/R2); max R2 = 300 kΩ. |
| 5 - OUT | Regulated Output | Delivers stable, low-noise output; requires ≥2.2 µF ceramic capacitor (X7R/X5R) with ESR ≤3 Ω for stability. |
Key Features
| Feature | Design Value |
|---|---|
| µCap Stability | Stable with 2.2 µF ceramic or tantalum output capacitors - eliminates need for large, costly electrolytics. |
| Reverse Battery Protection | Withstands –15 V input without damage or reverse leakage - protects system during battery insertion errors. |
| No-Load Regulation | Maintains regulation with zero output load - critical for CMOS RAM keep-alive and always-on monitoring circuits. |
| Thermal Shutdown | Auto-shutdown at ~150°C junction temperature - prevents permanent damage under overload or poor heatsinking. |
| Zero Shutdown Current | Ground current drops to ≤1 µA when EN = low - extends battery life in deep-sleep states. |
Applications
| USB Power Supply | Portable Logic Supply |
|---|---|
Use Scenario: Providing regulated 3.3 V or 5 V power to USB peripheral ICs from a shared 5 V or 12 V bus. IC Role / Device Role / Timing Role: Primary LDO regulator converting unregulated upstream supply to clean, low-noise logic rail. Use Value: Ultra-low ground current preserves bus power budget; 310 mV dropout allows operation even with underspecified input rails. | Use Scenario: Powering microcontroller I/O banks or FPGA configuration logic in handheld devices with 2-cell Li-ion (6–8.4 V) input. IC Role / Device Role / Timing Role: Adjustable LDO supplying configurable core or interface voltage (e.g., 1.8 V, 2.5 V, or 3.3 V). Use Value: Single MIC5235BM replaces multiple fixed-voltage regulators; 1.24 V reference enables precise resistor-set outputs. |
| Keep-Alive Supply | Automotive Body Control Module |
Use Scenario: Maintaining power to SRAM or real-time clock circuitry during main system shutdown in notebooks or IoT gateways. IC Role / Device Role / Timing Role: Always-on LDO delivering stable 3.0 V or 3.3 V from backup coin cell or supercapacitor. Use Value: 18 µA quiescent current enables multi-year battery life; no-load stability avoids brownout on wake-up. | Use Scenario: Regulating 5 V or 3.3 V for CAN transceivers or sensor interfaces in 12 V automotive systems with cold-crank transients. IC Role / Device Role / Timing Role: High-input-voltage LDO tolerant of 24 V load-dump events and reverse-battery faults. Use Value: 24 V absolute max input and reverse polarity protection eliminate need for external TVS or diode protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-ADJ/TO | Fixed 6 V max input; 250 mV dropout at 250 mA; 2.5 µA quiescent current. | Limited to lower-voltage systems; lacks reverse battery protection and 24 V capability. | Prefer MIC5235BM where input exceeds 6 V or reverse-polarity risk exists. |
| TPS7A1633DRBR | 3.3 V fixed output only; 17 µA IQ; 24 V input; no ADJ pin or external feedback. | Not adjustable; cannot replace MIC5235BM in designs requiring programmable output. | Select MIC5235BM when voltage flexibility, ADJ functionality, or reverse protection are required. |
Compared with MCP1703T-ADJ/TO and TPS7A1633DRBR, the MIC5235BM uniquely combines 24 V input tolerance, adjustable output (1.24–20 V), reverse battery protection, and sub-20 µA quiescent current - making it optimal for high-voltage portable and automotive LDO applications where flexibility and fault resilience are critical.
Availability
MIC5235BM is available at Aetrix Electronics and suitable for USB power supply design, portable logic supply generation, and keep-alive battery-backed systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MIC5235BM 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. It specialized in power management, timing, and interface ICs.
The MIC5235BM belongs to Micrel's µCap LDO family, designed specifically for battery-powered and high-input-voltage applications demanding ultra-low quiescent current, wide VIN range, and robust fault protection - not general-purpose regulation.
FAQ
What output voltage range does the MIC5235BM support?
The MIC5235BM supports an adjustable output voltage range from 1.24 V to 20 V, set by an external resistor divider connected to the ADJ pin. This is enabled by its internal 1.24 V reference voltage and feedback architecture. The MIC5235BM does not support fixed-output variants - its marking "BM" and datasheet ordering table confirm it is the adjustable version. Output accuracy remains ±2.0% across the full temperature range.
Does the MIC5235BM require a minimum load current to maintain regulation?
No, the MIC5235BM remains stable and in regulation with zero load current - a feature explicitly confirmed in the Applications Information section. This no-load stability is essential for keep-alive applications like SRAM backup or RTC power. Unlike many LDOs, it does not require a minimum load resistor to prevent oscillation or dropout drift.
What is the maximum input voltage the MIC5235BM can withstand?
The MIC5235BM has an absolute maximum input voltage rating of 38 V, but its recommended operating input voltage range is 2.3 V to 24 V. Exceeding 24 V risks violating the specified operating conditions, though transient tolerance up to 38 V is defined for non-operational stress. For sustained operation, 24 V is the functional upper limit - validated in all electrical characteristics and typical performance curves.
How does the MIC5235BM handle reverse battery connection?
The MIC5235BM includes built-in reverse battery protection: it withstands –15 V applied to the IN pin without damage or significant reverse leakage (<0.1 µA). This feature is verified in the Electrical Characteristics table under "Reverse Polarity Input" and eliminates the need for an external series diode in battery-powered designs where incorrect insertion is possible.
What output capacitor type and value are required for MIC5235BM stability?
The MIC5235BM requires a minimum 2.2 µF ceramic output capacitor with ESR ≤3 Ω for guaranteed stability - X7R or X5R dielectrics are recommended. Larger values improve transient response; tantalum capacitors are also acceptable. Y5V or Z5U ceramics are discouraged due to excessive capacitance drift over temperature, which may compromise regulation margin.
MIC5235BM 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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 20V
- 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
MIC5235BM FAQ
1.How can I place an order for MIC5235BM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5235BM 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 MIC5235BM reliable?
The price and inventory of MIC5235BM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5235BM is usually 5 days.
3.What payment methods are accepted for MIC5235BM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5235BM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5235BM?
MIC5235BM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5235BM 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 MIC5235BM?
For technical support, including MIC5235BM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5235BM requirements.
6.How does Aetrix verify that MIC5235BM is sourced from the original manufacturer or authorized distributors?
All MIC5235BM 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 MIC5235BM meets industry standards.
7.What is the process for return or replacement of MIC5235BM?
All MIC5235BM units undergo pre-shipment inspection (PSI). If there is an issue with MIC5235BM, 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 MIC5235BM part is unused and in its original packaging.
Return procedure for MIC5235BM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC5235BM Tags
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