My Inquiry
My Account
Microchip Technology MIC5235BM TR
- Part No.:
- MIC5235BM TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC5235BM TR.pdf
- Description:
- IC REG LIN POS ADJ 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,679
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC5235BM TR from Micrel is an adjustable-output, ultra-low-quiescent-current (18 µA typical) 150 mA low-dropout linear regulator with 2.3 V to 24 V input range and 310 mV dropout at full load. It features enable control, reverse battery protection, thermal shutdown, and stability with ≥2.2 µF ceramic output capacitors - ideal for keep-alive supplies in portable Li-ion–powered systems.
For engineers reviewing the MIC5235BM TR datasheet, MIC5235BM TR pinout, MIC5235BM TR application, or MIC5235BM TR equivalent, key selection criteria include its ultra-low ground current across wide input voltage, adjustable output via external resistors (1.24 V to 20 V), SOT-23-5 footprint compatibility, and operation over –40°C to +125°C junction temperature.
Technical Context
The MIC5235BM TR implements a µCap LDO architecture optimized for stability with low-ESR ceramic or tantalum output capacitors, eliminating need for electrolytic types. Its internal reference is 1.24 V, enabling precise adjustable output using two external resistors per VOUT = 1.24 V × (1 + R1/R2).
It integrates active-high enable logic, reverse polarity protection on VIN, and zero-shutdown current (<1 µA). Protection functions include thermal foldback, current limiting (~500 mA short-circuit), and reverse leakage suppression - all operating within the same SOT-23-5 package rated for 235°C/W θJA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 150 mA continuous - supports logic rails and low-power microcontrollers without thermal derating in minimal footprint. |
| Input Voltage Range | 2.3 V to 24 V - accommodates single- to triple-cell Li-ion batteries and industrial 12–24 V rails without external pre-regulation. |
| Ground Current | 18 µA typical at 100 µA load - enables multi-year battery life in always-on keep-alive circuits (e.g., RTC, SRAM backup). |
| Dropout Voltage | 310 mV at 150 mA - allows regulation down to ~1.55 V output from 1.85 V input, critical for low-VIN battery end-of-life operation. |
| Output Accuracy | ±2.0% over –40°C to +125°C - ensures reliable logic-level compliance across automotive and industrial ambient extremes. |
| Enable Threshold | VIL ≤ 0.6 V, VIH ≥ 2.0 V - compatible with 1.8 V, 3.3 V, and 5 V GPIOs without level shifting. |
| Stability Capacitor | ≥2.2 µF ceramic (X7R/X5R), ESR ≤ 3 Ω - eliminates need for large, aging-prone tantalum or aluminum electrolytics. |
Pinout & Package
Package: IttyBitty™ SOT-23-5 (M5), 2.80 mm × 1.75 mm × 1.30 mm body, 0.95 mm pitch, –40°C to +125°C junction rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Supply Input | Accepts 2.3 V–24 V unregulated input; requires ≥1 µF ceramic bypass capacitor near pin. |
| 2 - GND | Power Ground | Primary return path for load current and internal bias; must be low-impedance connection to system ground plane. |
| 3 - EN | Enable Input | Active-high digital control: <0.6 V disables regulator (ground current <1 µA); >2.0 V enables output regulation. |
| 4 - ADJ | Feedback Input | Connects to resistor divider (R1/R2) to set output: VOUT = 1.24 V × (1 + R1/R2); max R2 = 300 kΩ. |
| 5 - OUT | Regulated Output | Delivers stable, low-noise voltage; requires ≥2.2 µF ceramic capacitor with ESR ≤ 3 Ω for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Ground Current | 18 µA typical at light load - extends battery runtime in always-on applications such as CMOS RAM keep-alive. |
| Reverse Battery Protection | Withstands –15 V input without damage or reverse leakage - prevents system failure during incorrect battery insertion. |
| Zero Shutdown Current | <1 µA at VEN ≤ 0.6 V - eliminates standby power drain in powered-off subsystems. |
| µCap Stability | Stable with ≥2.2 µF X7R/X5R ceramic capacitors only - reduces BOM cost, size, and long-term reliability risk vs. tantalum. |
| Thermal & Current Protection | Internal foldback current limit (~500 mA) and thermal shutdown - prevents damage under overload or poor PCB thermal design. |
Applications
| USB Power Supply | Cellular Phone Baseband |
|---|---|
|
Use Scenario: Providing clean 3.3 V or adjustable rail from USB 5 V bus to USB peripheral ICs. IC Role / Device Role / Timing Role: Low-noise, enable-controlled post-regulator delivering stable voltage to USB transceivers and PHYs. Use Value: Ultra-low ground current minimizes USB bus loading; 24 V tolerance allows shared use with higher-voltage adapters. |
Use Scenario: Powering baseband processor I/O or memory interface in dual-mode GSM/UMTS handsets. IC Role / Device Role / Timing Role: Adjustable LDO supplying 1.8 V or 2.8 V logic rail with fast enable/disable synchronized to RF burst timing. Use Value: 310 mV dropout preserves headroom during Li-ion battery sag; ±2% accuracy maintains signal integrity at high data rates. |
| Keep-Alive Supply | Automotive Body Control Module |
|
Use Scenario: Maintaining SRAM or RTC voltage during main system power-down in notebooks or GPS loggers. IC Role / Device Role / Timing Role: Always-on, low-IQ regulator sustaining backup voltage from coin cell or main battery. Use Value: 18 µA ground current enables >10-year coin-cell lifetime; no-load stability avoids external discharge paths. |
Use Scenario: Regulating 5 V or 3.3 V for microcontroller peripherals in 12 V automotive environments. IC Role / Device Role / Timing Role: High-input-voltage LDO immune to load-dump transients up to 24 V, with reverse-polarity fault tolerance. Use Value: Withstands –15 V reverse battery events and operates across cold-crank (6 V) to load-dump (24 V) conditions without external protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/TT | Fixed 3.3 V output; 1.6 µA quiescent current; max 250 mA; 6 V max input; SOT-23-3 package. | Lacks adjustability, enable, and reverse protection; limited to low-VIN systems. | Select when fixed 3.3 V, ultra-low IQ, and minimal footprint outweigh need for adjustability or high-VIN support. |
| TPS7A0533PDBVR | Fixed 3.3 V output; 25 nA quiescent current; 200 mA; 6 V max input; SOT-23-5 package. | No reverse battery protection; no ADJ pin; lower IQ but narrower input range. | Prefer for ultra-low-power IoT sensors where input stays below 6 V and reverse polarity is not a risk. |
Compared with MCP1700T-3302E/TT and TPS7A0533PDBVR, the MIC5235BM TR uniquely combines 24 V input tolerance, adjustable output, reverse battery protection, and sub-20 µA ground current - making it the only option suitable for ruggedized, battery-flexible portable designs requiring long-term keep-alive operation.
Availability
MIC5235BM TR is available at Aetrix Electronics and suitable for USB power supply, cellular phone baseband, and keep-alive supply applications requiring stable component supply across extended temperature and high-input-voltage conditions.
Supply support for MIC5235BM 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 analog and mixed-signal semiconductor company acquired by Microchip Technology in 2015; known for high-reliability power management and timing solutions.
The MIC5235BM TR belongs to Micrel's µCap LDO family, engineered specifically for battery-powered portable electronics needing ultra-low quiescent current, wide input voltage range, and robust fault protection.
FAQ
What output voltage does the MIC5235BM TR deliver?
The MIC5235BM TR is an adjustable-output LDO; its output voltage is set externally using two resistors connected to the ADJ pin per VOUT = 1.24 V × (1 + R1/R2). It supports outputs from 1.24 V to 20 V. Unlike fixed versions (e.g., MIC5235-3.0BM5), the MIC5235BM TR has no factory-trimmed voltage - full flexibility is retained in circuit design.
Does the MIC5235BM TR require an input capacitor?
Yes, the MIC5235BM TR requires a minimum 1.0 µF ceramic input capacitor placed close to the IN and GND pins. This stabilizes the input supply against source impedance and transient load demands. For high-ripple sources or remote battery connections, larger values (e.g., 4.7 µF) improve noise rejection and transient response.
Can the MIC5235BM TR operate with a 1.5 V input?
No - the MIC5235BM TR has a minimum input voltage of 2.3 V, as specified in its absolute operating ratings. Attempting to operate below this threshold results in loss of regulation and undefined behavior. For sub-2.3 V inputs, alternative LDOs with lower VIN(min) (e.g., TPS7A02) must be selected.
How does reverse battery protection work on the MIC5235BM TR?
The MIC5235BM TR internally blocks reverse current flow when VIN is driven negative relative to GND (e.g., –15 V), preventing damage and avoiding system backfeed. This is achieved via integrated protection circuitry - no external diodes or MOSFETs are needed. The device remains undamaged and draws <0.1 µA under –15 V reverse bias.
Is the MIC5235BM TR RoHS-compliant and halogen-free?
Yes - the MIC5235BM TR (SOT-23-5 package) conforms to RoHS Directive 2011/65/EU and is halogen-free per JEDEC JS709A. Micrel's original datasheet (January 2002) predates formal RoHS enforcement, but Microchip's post-acquisition product change notices confirm full compliance for legacy Micrel parts including MIC5235BM TR.
MIC5235BM 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:
- 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 TR FAQ
1.How can I place an order for MIC5235BM TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5235BM 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 MIC5235BM TR reliable?
The price and inventory of MIC5235BM TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5235BM TR is usually 5 days.
3.What payment methods are accepted for MIC5235BM TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5235BM TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5235BM TR?
MIC5235BM TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5235BM 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 MIC5235BM TR?
For technical support, including MIC5235BM TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5235BM TR requirements.
6.How does Aetrix verify that MIC5235BM TR is sourced from the original manufacturer or authorized distributors?
All MIC5235BM 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 MIC5235BM TR meets industry standards.
7.What is the process for return or replacement of MIC5235BM TR?
All MIC5235BM TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5235BM 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 MIC5235BM TR part is unused and in its original packaging.
Return procedure for MIC5235BM TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC5235BM TR Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
