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Microchip Technology MIC5381-G4YFT-TR
- Part No.:
- MIC5381-G4YFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UFQFN, 6-TMLF®
- Datasheet:
-
MIC5381-G4YFT-TR.pdf
- Description:
- IC REG LINEAR 1.2V/1.8V 6TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,196
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Product details
Overview
MIC5381-G4YFT-TR from Micrel is a dual low-dropout linear regulator IC delivering two independent 150mA outputs at fixed 1.8V and 1.2V, housed in a 6-pin 1mm × 1mm Thin MLF® package. It features ±1% typical output accuracy, 155mV dropout at full load, 32µA quiescent current per LDO, and integrated auto-discharge circuitry for rapid output capacitor discharge during shutdown - ideal for battery-powered portable electronics requiring tight space and fast power-state transitions.
For engineers reviewing the MIC5381-G4YFT-TR datasheet, MIC5381-G4YFT-TR pinout, MIC5381-G4YFT-TR application, or MIC5381-G4YFT-TR equivalent, key selection criteria include dual-output voltage pairing, ultra-small footprint compatibility, enable-controlled independent regulation, zero-off-mode current (≤1µA), and guaranteed operation across –40°C to +125°C junction temperature.
Technical Context
The MIC5381-G4YFT-TR integrates two CMOS-based LDO regulators with separate active-high enable inputs (EN1/EN2), enabling independent on/off control of each 150mA output. Its internal reference and error amplifier deliver ±1% typical output accuracy over line, load, and temperature.
Unlike the MIC5380 variant, the MIC5381-G4YFT-TR includes an integrated 30Ω (typ) NFET auto-discharge path per output activated when both EN1 and EN2 are low - ensuring rapid VOUT1/VOUT2 discharge without external components. It operates from 2.5V to 5.5V input and remains stable with only 1µF 0402 ceramic output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | Fixed 1.8V (VOUT1) and 1.2V (VOUT2); enables dual-rail power for core + I/O or DSP + memory subsystems. |
| Max Output Current | 150mA per LDO; supports moderate-current digital loads like Bluetooth baseband, camera ISPs, or USB PHYs. |
| Dropout Voltage | 155mV at 150mA; allows operation down to VIN = 1.95V for 1.8V rail and VIN = 1.35V for 1.2V rail. |
| Quiescent Current | 32µA per LDO (64µA total active); minimizes standby drain in always-on subsystems. |
| Accuracy | ±1% typical (–40°C to +85°C); ensures reliable logic-level margin for 1.2V/1.8V interfaces. |
| Auto-Discharge | 30Ω internal NFET per output; discharges 1µF cap in <1ms - critical for safe state transitions in portable devices. |
| PSRR | 60dB at 1kHz; suppresses switching noise from upstream DC/DC converters feeding VIN. |
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 | Regulated 1.8V output; supplies core logic or processor I/O domain. |
| 2 | VOUT2 | Regulated 1.2V output; powers low-voltage analog blocks or memory interfaces. |
| 3 | EN2 | Active-high enable for VOUT2; must be pulled high via MCU GPIO or resistor to enable 1.2V rail. |
| 4 | EN1 | Active-high enable for VOUT1; independent control allows staggered power-up sequences. |
| 5 | GND | Common ground reference for both LDOs; requires low-inductance connection to PCB ground plane. |
| 6 | VIN | Input supply (2.5V–5.5V); shared by both regulators; requires 1µF ceramic decoupling to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables discrete power sequencing and fault isolation between 1.8V and 1.2V domains. |
| Auto-discharge circuitry | Eliminates need for external bleed resistors - reduces BOM count and PCB area in space-constrained designs. |
| Stable with 0402 1µF ceramics | Supports smallest standard SMT capacitor size, minimizing footprint and cost in ultra-portable layouts. |
| Zero-off-mode current | Draws ≤1µA total when both EN1 and EN2 are low - extends battery life in deep-sleep modes. |
| Thermal & current protection | Integrated thermal shutdown and foldback current limiting prevent damage during overload or poor heatsinking. |
Applications
| Bluetooth Headset Power Management | Mobile Phone Camera Module Supply |
|---|---|
Use Scenario: Dual-rail power for Bluetooth baseband (1.8V) and RF transceiver (1.2V) in compact headset PCBs. IC Role / Device Role / Timing Role: Primary dual-LDO regulator providing sequenced, low-noise bias rails with fast disable response. Use Value: Auto-discharge prevents residual voltage on 1.2V rail from interfering with RF startup timing during wake-from-sleep events. | Use Scenario: Dedicated power for image sensor (1.2V analog) and ISP processor (1.8V digital) in smartphone camera modules. IC Role / Device Role / Timing Role: Dual-output LDO delivering clean, independently controllable rails with minimal board area. Use Value: Independent EN1/EN2 pins allow sensor power-down while keeping ISP in standby - reducing system idle current by >50µA. |
| USB Flash Drive Controller Supply | Medical Handheld Diagnostic Sensor Bias |
Use Scenario: Powering NAND flash controller (1.8V) and USB PHY (1.2V) in sub-20mm² thumb drives. IC Role / Device Role / Timing Role: Compact dual-LDO replacing discrete regulators and discharge resistors. Use Value: 1mm × 1mm footprint and integrated discharge eliminate layout bottlenecks in ultra-thin enclosures. | Use Scenario: Biasing low-power analog front-end (1.2V) and microcontroller core (1.8V) in battery-operated glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Precision dual-LDO ensuring stable sensor excitation and ADC reference integrity. Use Value: ±1% output accuracy maintains measurement repeatability across temperature; 32µA quiescent current extends single-battery runtime beyond 12 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5380-G4YFT | No auto-discharge circuit; identical pinout, output voltages, and electrical specs otherwise. | Requires external discharge resistors for same shutdown behavior; increases BOM and layout complexity. | Select MIC5380-G4YFT only if auto-discharge is unnecessary and lowest possible BOM cost is prioritized. |
| Torex XC6217D1812MR-G | Same 1.8V/1.2V dual output, but uses 8-pin SOT-23-8 package (2.3mm × 2.9mm); no integrated discharge. | Larger footprint; lacks auto-discharge and zero-off-mode current (<1µA) - draws ~10µA in shutdown. | Choose XC6217D1812MR-G only if existing layout accommodates larger package and external discharge is acceptable. |
Compared with MIC5380-G4YFT and XC6217D1812MR-G, the MIC5381-G4YFT-TR uniquely delivers integrated auto-discharge and true zero-off-mode current in the smallest available footprint - making it optimal for next-generation wearables and miniaturized medical devices where board area and fast power-state transitions are critical.
Availability
MIC5381-G4YFT-TR is available at Aetrix Electronics and suitable for Bluetooth headsets, mobile phone camera modules, and USB flash drive controller designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5381-G4YFT-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 RF solutions before its acquisition by Microchip Technology in 2015. Known for high-performance LDOs and timing products.
The MIC5380/1 family was designed specifically for space-constrained portable electronics - delivering dual-output regulation, ultra-low quiescent current, and integrated discharge in sub-1mm² packages to replace discrete solutions in handheld and wearable systems.
FAQ
What output voltages does the MIC5381-G4YFT-TR provide?
The MIC5381-G4YFT-TR provides fixed 1.8V on VOUT1 and 1.2V on VOUT2. These values are factory-trimmed and non-adjustable. The "G4" marking code explicitly denotes this 1.8V/1.2V configuration per Micrel's ordering information table. No external feedback network is required or supported.
Does the MIC5381-G4YFT-TR require external capacitors?
Yes - the MIC5381-G4YFT-TR requires a minimum 1µF ceramic capacitor from VIN to GND and 1µF from each VOUT to GND. Micrel specifies X5R or X7R dielectrics in 0402 case size for stability and temperature performance. Y5V or Z5U types are not recommended due to excessive capacitance loss over temperature.
How does the auto-discharge function work on the MIC5381-G4YFT-TR?
When both EN1 and EN2 are driven low, the MIC5381-G4YFT-TR activates internal 30Ω NFETs between each VOUT pin and GND. This discharges 1µF output capacitors in under 1ms. The feature is exclusive to MIC5381 variants - MIC5380 parts lack this circuitry and require external discharge paths.
What is the maximum ambient temperature for continuous 150mA operation on both outputs of the MIC5381-G4YFT-TR?
At VIN = 3.6V, VOUT1 = 1.8V, VOUT2 = 1.2V, and 150mA per output, power dissipation is ~0.36W. With θJA = 150°C/W and TJ(max) = 125°C, the maximum ambient temperature is ~71°C. Derating is required above this; refer to Micrel's thermal calculation methodology in Section 8 of the datasheet for layout-specific validation.
Is the MIC5381-G4YFT-TR pin-compatible with other MIC5380/1 variants?
Yes - all MIC5380/1 variants, including MIC5381-G4YFT-TR, share identical 6-pin 1mm × 1mm Thin MLF® pinout and footprint. VOUT1, VOUT2, EN2, EN1, GND, and VIN assignments are consistent across the family. Only the output voltage pair and presence of auto-discharge differ between MIC5380 and MIC5381 versions.
MIC5381-G4YFT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-UFQFN, 6-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V, 1.8V
- 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-G4YFT-TR FAQ
1.How can I place an order for MIC5381-G4YFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5381-G4YFT-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-G4YFT-TR reliable?
The price and inventory of MIC5381-G4YFT-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-G4YFT-TR is usually 5 days.
3.What payment methods are accepted for MIC5381-G4YFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5381-G4YFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5381-G4YFT-TR?
MIC5381-G4YFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5381-G4YFT-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-G4YFT-TR?
For technical support, including MIC5381-G4YFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5381-G4YFT-TR requirements.
6.How does Aetrix verify that MIC5381-G4YFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5381-G4YFT-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-G4YFT-TR meets industry standards.
7.What is the process for return or replacement of MIC5381-G4YFT-TR?
All MIC5381-G4YFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5381-G4YFT-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-G4YFT-TR part is unused and in its original packaging.
Return procedure for MIC5381-G4YFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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