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Microchip Technology MIC5232-3.3YML-TR
- Part No.:
- MIC5232-3.3YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5232-3.3YML-TR.pdf
- Description:
- IC REG LINEAR 3.3V 10MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:5,968
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Product details
Overview
MIC5232-3.3YML-TR from Micrel is a fixed 3.3V, 10mA ultra-low-quiescent-current LDO regulator in a 6-pin 2mm × 2mm MLF® package, designed for battery-powered keep-alive functions. It delivers 1.8µA quiescent current, 100mV dropout at full load, reverse current protection (20nA), and stable operation with only 0.47µF ceramic output capacitance - ideal for real-time clock and SRAM backup in portable electronics.
For engineers reviewing the MIC5232-3.3YML-TR datasheet, MIC5232-3.3YML-TR pinout, MIC5232-3.3YML-TR application, or MIC5232-3.3YML-TR equivalent, key selection criteria include ultra-low IQ, µCap compatibility, logic-level enable input, reverse leakage performance, and thermal behavior in compact MLF packaging under -40°C to +125°C junction conditions.
Technical Context
The MIC5232-3.3YML-TR employs a CMOS-based low-dropout architecture with internal current limiting and reverse-battery protection circuitry. Its enable input accepts logic-high signals ≥1.4V and shuts down below 0.18V, drawing only 0.1–1.5µA in shutdown mode.
It achieves stability without ESR-sensitive output capacitors, supporting 0.47µF to >10µF ceramic capacitors. Dropout voltage remains ≤100mV at 10mA load and varies <10mV over temperature (–40°C to +125°C) for the 3.3V variant, as confirmed by typical characteristics curves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.0% initial accuracy; ±3.0% over –40°C to +125°C - ensures reliable biasing of 3.3V logic and memory circuits. |
| Quiescent Current | 1.8µA typical operating current - enables multi-year battery life in RTC and memory backup applications. |
| Dropout Voltage | 100mV at 10mA load - allows regulation from single-cell Li-ion (≥3.4V) down to end-of-discharge (~3.4V). |
| Output Capacitor | Stable with 0.47µF ceramic capacitor - reduces BOM cost and PCB area vs. tantalum or larger ceramics. |
| Reverse Leakage | 20nA max when VOUT > VVIN - prevents backfeed into depleted batteries or shared rails. |
| Enable Threshold | Logic-high enable ≥1.4V; shutdown <0.18V - compatible with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Resistance | θJA = 90°C/W (MLF-6) - supports 10mA continuous output at up to +124°C ambient with 4.3V input. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF® (MicroLeadFrame) with exposed thermal pad (ePad) connected to GND. RoHS-compliant, halogen-free mold compound, NiPdAu lead finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN | Active-high enable input; must be pulled high (>1.4V) to activate regulator; floating not allowed. |
| 2 | GND | Power ground reference; connects internally to ePad for thermal and electrical integrity. |
| 3 | VIN | Input supply pin; accepts 2.7V–7.0V; requires local 1µF bypass if >20cm from source. |
| 4 | VOUT | Regulated 3.3V output; capable of sourcing 10mA; stable with ≥0.47µF ceramic capacitor. |
| 5 | NC | No internal connection; no external tie required. |
| 6 | NC | No internal connection; no external tie required. |
Key Features
| Feature | Design Value |
|---|---|
| µCap Operation | Stable with 0.47µF ceramic output capacitor - eliminates need for large or ESR-dependent capacitors, reducing footprint and cost. |
| Reverse Battery Protection | 20nA reverse leakage at VOUT > VVIN - prevents power loss and battery drain during system power-down or fault conditions. |
| Ultra-Low Ground Current | 1.8µA operating ground current - minimizes total system standby power, critical for multi-year battery operation. |
| Tight Output Accuracy | ±2.0% initial tolerance and ±3.0% over full temperature range - ensures reliable interface with 3.3V I/O and memory without margining overhead. |
| Logic-Level Enable | 1.4V min enable threshold - directly drivable by 1.8V or 3.3V microcontroller GPIOs without external level shifters. |
Applications
| Real-Time Clock Power Supply | SRAM Memory Back-up Supply |
|---|---|
Use Scenario: Maintaining timekeeping during main system power-off in wearables and IoT edge nodes. IC Role / Device Role / Timing Role: Provides always-on 3.3V bias to RTC ICs (e.g., DS3231, PCF8563) with minimal self-consumption. Use Value: 1.8µA quiescent current extends coin-cell life beyond 10 years while sustaining accurate timekeeping. | Use Scenario: Preserving volatile SRAM contents during host MCU sleep or brown-out events. IC Role / Device Role / Timing Role: Delivers regulated 3.3V to low-leakage SRAM (e.g., CY14B101QN) during system hibernation. Use Value: Reverse leakage <20nA prevents backfeed into dying batteries, ensuring data retention integrity. |
| Stand-by Power Supply | Cellular Telephone Keep-Alive |
Use Scenario: Powering wake-up controllers, sensors, or RF receivers in ultra-low-power monitoring systems. IC Role / Device Role / Timing Role: Supplies clean, low-noise 3.3V to always-listening subsystems with fast enable response (≤1.5ms turn-on). Use Value: 0.75–1.5ms turn-on time enables rapid wake-up from deep sleep without voltage droop or overshoot. | Use Scenario: Supporting baseband processor retention and SIM card power in GSM/LTE handsets during flight mode. IC Role / Device Role / Timing Role: Regulates 3.3V rail for modem control logic and secure element interfaces during extended idle periods. Use Value: 100mV dropout at 10mA allows operation down to 3.4V input - compatible with single-cell Li-ion discharge profile. |
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 | 1.6µA IQ, same 3.3V output, SOT-23-5 package, no reverse leakage spec published. | Lacks documented reverse-battery protection; suitable where backfeed risk is absent. | Select when lowest possible IQ is primary and reverse leakage is not a system requirement. |
| TCS2103-3.3V | 2.5µA IQ, 3.3V output, 6-pin DFN (2×2mm), 120mV dropout @ 10mA. | Higher dropout limits usable input range; no explicit reverse leakage rating. | Choose when board uses identical 2×2mm DFN footprint but tolerates slightly higher dropout and IQ. |
Compared with MCP1700T-3302E/TT and TCS2103-3.3V, the MIC5232-3.3YML-TR uniquely combines verified 20nA reverse leakage, 100mV dropout, and µCap stability in an MLF package - making it optimal for safety-critical keep-alive designs where backfeed prevention and battery longevity are non-negotiable.
Availability
MIC5232-3.3YML-TR is available at Aetrix Electronics and suitable for real-time clock power supply, SRAM memory back-up supply, and cellular telephone keep-alive applications requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for MIC5232-3.3YML-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 founded in 1978 and acquired by Microchip Technology in 2015. Known for high-reliability power management and timing solutions.
The MIC5232 family was developed specifically for ultra-low-power keep-alive regulation in portable and battery-backed systems - emphasizing quiescent current minimization, reverse protection, and µCap compatibility without sacrificing accuracy or thermal robustness.
FAQ
What is the maximum input voltage for MIC5232-3.3YML-TR?
The MIC5232-3.3YML-TR supports an absolute maximum input voltage of 8V, with recommended operating range from 2.7V to 7.0V. Exceeding 8V may damage the device. For sustained operation, VIN should remain within the 2.7–7.0V window to ensure specified dropout, accuracy, and thermal performance - especially critical when using the 3.3V output in single-cell Li-ion systems.
Does MIC5232-3.3YML-TR require a minimum load current?
No, the MIC5232-3.3YML-TR does not require a minimum load current for stable operation. This feature is essential for keep-alive applications such as RTC or SRAM backup, where output currents can drop to sub-µA levels. The regulator maintains regulation and low quiescent current even at zero load, enabling true "zero-load" standby functionality without external dummy loads.
What is the thermal performance of MIC5232-3.3YML-TR in its MLF package?
The MIC5232-3.3YML-TR has a junction-to-ambient thermal resistance (θJA) of 90°C/W in the 2mm × 2mm MLF package. At 10mA load and 4.3V input, power dissipation is ~0.01W, allowing a maximum ambient temperature of 124°C before reaching the 125°C junction limit - confirming suitability for high-temperature industrial and automotive cabin environments.
Can MIC5232-3.3YML-TR be used with a 0.22µF output capacitor?
No - the MIC5232-3.3YML-TR requires a minimum 0.47µF ceramic output capacitor for guaranteed stability, as validated in the datasheet's Electrical Characteristics and Application Information sections. Using 0.22µF risks oscillation or poor transient response. The 0.47µF value is the smallest tested and specified; larger values (up to 10µF) improve transient behavior but increase settling time after load steps.
Is MIC5232-3.3YML-TR pin-compatible with other MIC5232 variants in the MLF package?
Yes - all MIC5232-YML variants (e.g., MIC5232-1.2YML, MIC5232-2.5YML, MIC5232-3.3YML) share identical 6-pin MLF pinout, package dimensions, and thermal pad configuration. Only the output voltage differs; EN, VIN, GND, and VOUT pins occupy identical positions across the family, enabling voltage-scaling design reuse without PCB changes.
MIC5232-3.3YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad, 6-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 10mA
- Current - Output:
- 10mA
- Current - Quiescent (Iq):
- 3 µA
- Current - Supply (Max):
- -
- PSRR:
- 55dB ~ 35dB (10Hz ~ 1kHz)
- Control Features:
- Enable
- Protection Features:
- Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
MIC5232-3.3YML-TR FAQ
1.How can I place an order for MIC5232-3.3YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5232-3.3YML-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 MIC5232-3.3YML-TR reliable?
The price and inventory of MIC5232-3.3YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5232-3.3YML-TR is usually 5 days.
3.What payment methods are accepted for MIC5232-3.3YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5232-3.3YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5232-3.3YML-TR?
MIC5232-3.3YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5232-3.3YML-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 MIC5232-3.3YML-TR?
For technical support, including MIC5232-3.3YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5232-3.3YML-TR requirements.
6.How does Aetrix verify that MIC5232-3.3YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5232-3.3YML-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 MIC5232-3.3YML-TR meets industry standards.
7.What is the process for return or replacement of MIC5232-3.3YML-TR?
All MIC5232-3.3YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5232-3.3YML-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 MIC5232-3.3YML-TR part is unused and in its original packaging.
Return procedure for MIC5232-3.3YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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