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Microchip Technology MIC5381-PPYFT-TR
- Part No.:
- MIC5381-PPYFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UFQFN, 6-TMLF®
- Datasheet:
-
MIC5381-PPYFT-TR.pdf
- Description:
- IC REG LINEAR 3V/3V 6TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,914
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Product details
Overview
MIC5381-PPYFT-TR from Micrel is a dual-channel, fixed-output 3.0V/3.0V low-dropout linear regulator IC designed for space-constrained portable electronics. It delivers 150mA per channel, achieves ±1% typical output accuracy, maintains 155mV dropout at full load, and features independent active-high enable pins - enabling precise power sequencing in battery-powered systems such as Bluetooth headsets and medical handhelds.
For engineers reviewing the MIC5381-PPYFT-TR datasheet, MIC5381-PPYFT-TR pinout, MIC5381-PPYFT-TR application, or MIC5381-PPYFT-TR equivalent, key selection criteria include its 1mm × 1mm Thin MLF® package, auto-discharge functionality on both outputs, 32µA quiescent current per LDO, and guaranteed operation across –40°C to +125°C junction temperature.
Technical Context
The MIC5381-PPYFT-TR integrates two independent CMOS-based LDO regulators with internal reference, error amplifiers, and pass transistors. Each channel supports 2.5V–5.5V input and delivers regulated 3.0V output with fast transient response and 60dB PSRR at 1kHz.
Unlike the MIC5380 variant, the MIC5381-PPYFT-TR includes an integrated auto-discharge circuit: when either EN1 or EN2 is driven low, a 30Ω (typ) NFET connects the corresponding VOUT to GND to rapidly discharge external capacitors - critical for system-level power-down integrity and voltage rail collapse timing control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V / 3.0V - eliminates external feedback resistors and ensures stable dual-rail generation without trimming. |
| Max Output Current | 150mA per LDO - sufficient to power core logic, RF transceivers, or sensor subsystems in compact portable devices. |
| Dropout Voltage | 155mV at 150mA - enables regulation from 3.155V input, preserving battery runtime down to low cell voltages. |
| Quiescent Current | 32µA per LDO - minimizes standby power loss, supporting multi-day battery life in always-on monitoring applications. |
| Auto-Discharge Resistance | 30Ω typical - ensures rapid VOUT collapse (<100µs for 1µF load) during disable, preventing latch-up or back-powering of upstream circuits. |
| PSRR | 60dB at 1kHz - suppresses switching noise from DC-DC converters feeding VIN, improving signal integrity in mixed-signal SoC power domains. |
| Operating Temp Range | –40°C to +125°C junction - qualified for industrial and automotive cabin-temperature environments without derating. |
Pinout & Package
Package: 6-pin 1mm × 1mm Thin MLF® (RoHS-compliant, NiPdAu lead finish, halogen-free mold compound). Pin 1 identified by ▲ mark (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT1 | LDO1 regulated output | Supplies first 3.0V rail; requires ≥1µF ceramic capacitor to GND for stability. |
| 2 - VOUT2 | LDO2 regulated output | Supplies second independent 3.0V rail; auto-discharged when EN2 = low. |
| 3 - EN2 | Active-high enable for LDO2 | Logic high (≥1.2V) enables LDO2; must not float - tie to GND or controller GPIO. |
| 4 - EN1 | Active-high enable for LDO1 | Enables/disables LDO1 independently; drives internal 30Ω discharge path when low. |
| 5 - GND | Analog/digital ground reference | Common return for both LDOs and enable inputs; requires low-inductance PCB connection. |
| 6 - VIN | Input supply (2.5V–5.5V) | Feeds both regulators; requires 1µF ceramic bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small footprint | 1mm × 1mm Thin MLF® package - saves >70% board area vs. standard SOT-23 dual-LDO solutions. |
| Independent enable control | Separate EN1/EN2 pins allow staggered power-up/down sequencing for SoC core/peripheral rails. |
| Output auto-discharge | Integrated 30Ω NFET per output - eliminates need for external bleed resistors and reduces BOM count. |
| Low-noise regulation | 200µVRMS output noise (10Hz–100kHz) - suitable for powering ADC references and RF synthesizers. |
| Robust protection | Thermal shutdown and current limit (200–550mA) prevent damage during short-circuit or overload events. |
Applications
| Bluetooth Headset Power Management | Medical Handheld Sensor Subsystem |
|---|---|
|
Use Scenario: Dual-rail power for Bluetooth baseband processor (3.0V I/O) and audio codec (3.0V analog). IC Role / Device Role / Timing Role: Dual LDO providing isolated, low-noise 3.0V supplies with independent enable control for power sequencing. Use Value: Auto-discharge prevents cross-conduction during mode transitions; 155mV dropout extends talk time from single Li-ion cell. |
Use Scenario: Powering precision analog front-end (AFE) and microcontroller in portable ECG monitor. IC Role / Device Role / Timing Role: Regulating clean 3.0V rails for ADC reference and MCU core, with fast discharge to meet IEC 62304 safe-shutdown requirements. Use Value: ±1% accuracy ensures measurement repeatability; 32µA quiescent current enables multi-week battery life in standby. |
| USB Thumb Drive Controller | GPS Receiver Module |
|
Use Scenario: Supplying 3.0V to NAND flash controller and USB PHY in ultra-thin USB storage device. IC Role / Device Role / Timing Role: Compact dual-LDO delivering stable voltage under dynamic load changes during data transfer bursts. Use Value: 60dB PSRR rejects noise from USB 2.0 data lines; 1µF ceramic compatibility enables 0402-size capacitors for minimal footprint. |
Use Scenario: Powering GPS baseband IC and RF front-end in vehicle-mounted navigation unit. IC Role / Device Role / Timing Role: Providing thermally robust 3.0V rails across automotive ambient range (–40°C to +105°C). Use Value: 150°C/W θJA enables full 150mA operation at 98°C ambient; thermal shutdown prevents field failure under sustained high-temp operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6223D301MR-G | Single-output 3.0V LDO (150mA), no auto-discharge, 6-pin SOT-25 package (2.9mm × 2.8mm) | Lacks dual-rail capability and output discharge - requires two devices and external discharge resistors for equivalent function. | Select only if board space allows larger footprint and system does not require coordinated rail shutdown. |
| Ricoh RP512N301B-TR-F | Dual 3.0V/3.0V LDO (200mA each), no auto-discharge, 8-pin DFN (2.0mm × 2.0mm), higher IQ (65µA) | Higher current capacity but larger size and no integrated discharge - increases component count and layout complexity. | Prefer when peak load exceeds 150mA per rail and discharge is handled externally or not required. |
Compared with Torex XC6223D301MR-G and Ricoh RP512N301B-TR-F, the MIC5381-PPYFT-TR uniquely combines dual 3.0V regulation, 1mm × 1mm footprint, and per-rail auto-discharge in a single RoHS-compliant package - reducing total solution size by >60% and eliminating four passive components versus discrete alternatives.
Availability
MIC5381-PPYFT-TR is available at Aetrix Electronics and suitable for Bluetooth headsets, medical handhelds, and GPS receiver modules requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for MIC5381-PPYFT-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 analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015. Its legacy LDO portfolio remains widely deployed in portable and industrial systems.
The MIC5380/1 family was engineered specifically for ultra-compact, battery-powered consumer electronics - prioritizing minimal footprint, low quiescent current, and fast transient response without sacrificing accuracy or protection.
FAQ
What is the key functional difference between MIC5381-PPYFT-TR and MIC5380-PPYFT-TR?
The MIC5381-PPYFT-TR includes an integrated auto-discharge circuit on both VOUT1 and VOUT2, activated when EN1 or EN2 is driven low - connecting each output to GND via a 30Ω NFET. The MIC5380-PPYFT-TR lacks this feature and requires external discharge resistors. This makes MIC5381-PPYFT-TR preferable for applications demanding controlled rail collapse during shutdown, such as USB-compliant hot-plug detection or medical safety shutdown sequences.
Can MIC5381-PPYFT-TR operate with 1µF ceramic output capacitors?
Yes, MIC5381-PPYFT-TR is explicitly designed and characterized for stability with 1µF X5R/X7R ceramic capacitors in 0402 case size. The datasheet confirms no minimum ESR requirement and specifies that larger capacitance does not improve performance - making 1µF the optimal, space-efficient choice for both VOUT1 and VOUT2.
What is the maximum ambient temperature for MIC5381-PPYFT-TR at full 150mA load per channel?
At VIN = 3.6V and 150mA per channel with 3.0V outputs, MIC5381-PPYFT-TR dissipates ~0.18W. With a junction-to-ambient thermal resistance (θJA) of 150°C/W and TJ(max) = 125°C, the maximum allowable ambient temperature is 98°C - verified in the datasheet's thermal calculation example for MIC5380-PPYFT, which shares identical package and thermal characteristics.
Does MIC5381-PPYFT-TR require input capacitance, and what type is recommended?
Yes, MIC5381-PPYFT-TR requires a minimum 1µF ceramic input capacitor from VIN to GND for stability and noise filtering. X5R or X7R dielectric types in 0402 size are recommended; Y5V dielectrics are discouraged due to excessive capacitance loss over temperature. High-frequency noise suppression benefits from adding a small NPO capacitor in parallel.
Is MIC5381-PPYFT-TR compatible with lead-free reflow processes?
Yes, MIC5381-PPYFT-TR uses a RoHS-compliant 6-pin 1mm × 1mm Thin MLF® package with NiPdAu lead finish and halogen-free mold compound. Its maximum soldering temperature rating is 260°C for 10 seconds - fully compatible with standard lead-free reflow profiles per JEDEC J-STD-020.
MIC5381-PPYFT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-UFQFN, 6-TMLF®
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3V, 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.31V @ 150mA, 0.31V @ 150mA
- Current - Output:
- 150mA, 150mA
- Current - Quiescent (Iq):
- 45 µA
- Current - Supply (Max):
- 85 µA
- PSRR:
- 60dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TMLF® (1x1)
MIC5381-PPYFT-TR FAQ
1.How can I place an order for MIC5381-PPYFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5381-PPYFT-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 MIC5381-PPYFT-TR reliable?
The price and inventory of MIC5381-PPYFT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5381-PPYFT-TR is usually 5 days.
3.What payment methods are accepted for MIC5381-PPYFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5381-PPYFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5381-PPYFT-TR?
MIC5381-PPYFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5381-PPYFT-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 MIC5381-PPYFT-TR?
For technical support, including MIC5381-PPYFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5381-PPYFT-TR requirements.
6.How does Aetrix verify that MIC5381-PPYFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5381-PPYFT-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 MIC5381-PPYFT-TR meets industry standards.
7.What is the process for return or replacement of MIC5381-PPYFT-TR?
All MIC5381-PPYFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5381-PPYFT-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 MIC5381-PPYFT-TR part is unused and in its original packaging.
Return procedure for MIC5381-PPYFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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