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Microchip Technology MIC5399-MMYMX-TR
- Part No.:
- MIC5399-MMYMX-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
MIC5399-MMYMX-TR.pdf
- Description:
- IC REG LINEAR 2.8V/2.8V 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MIC5399-MMYMX-TR from Microchip Technology is a dual-output, low-power LDO voltage regulator delivering two independent 300 mA outputs at fixed 2.8 V each, operating from 2.5 V to 5.5 V input. It features ±2% output accuracy, 160 mV dropout at full load, and integrated output discharge circuitry and enable pull-down resistors-ideal for space-constrained portable electronics requiring fast transient response and stable dual-rail power.
For engineers reviewing the MIC5399-MMYMX-TR datasheet, MIC5399-MMYMX-TR pinout, MIC5399-MMYMX-TR application, or MIC5399-MMYMX-TR equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in medical and consumer devices, and confirmed alternative options for dual-LDO system design.
Technical Context
The MIC5399-MMYMX-TR implements two fully independent linear regulators sharing only ground and thermal paths. Each LDO supports independent enable control (active-high), with internal 4 MΩ pull-down resistors ensuring safe disable during tri-state conditions. Its architecture enables simultaneous or staggered power-up sequencing without cross-regulator coupling.
Each output includes an auto-discharge NFET (25 Ω typical) activated upon disable, rapidly draining external capacitors to prevent residual voltage hold-up. The device maintains stability with ≥1 µF ceramic output capacitors and achieves 60 dB PSRR at 1 kHz-critical for noise-sensitive analog and RF-adjacent subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8 V per channel (fixed, factory-trimmed; no external feedback required) |
| Max Output Current | 300 mA per LDO (supports dual-core SoC rails or parallel sensor + MCU supplies) |
| Dropout Voltage | 160 mV at 300 mA (enables operation down to 2.96 V input for 2.8 V output) |
| Accuracy | ±2% over –40°C to +125°C (guaranteed regulation tolerance across full industrial temp range) |
| Quiescent Current | 37 µA per LDO (typical, enabling >1-year battery life in always-on wearable sensors) |
| PSRR | 60 dB at 1 kHz (suppresses switching noise from adjacent DC/DC converters) |
| Shutdown Current | 0.05 µA (typical; near-zero leakage when both EN pins are low) |
Pinout & Package
Package: 8-Lead Extra Thin DFN (X2DFN), 1.6 mm × 1.2 mm × 0.35 mm body, exposed thermal pad (ePad) connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4 | GND | Common ground reference for both LDOs and thermal path to PCB via ePad |
| 2 | VOUT1 | Regulated 2.8 V output for first rail; requires ≥1 µF ceramic capacitor to GND |
| 3 | VOUT2 | Regulated 2.8 V output for second rail; independent of VOUT1, supports separate load transients |
| 5 | EN2 | Active-high enable for LDO2; internal 4 MΩ pull-down ensures default OFF state if left floating |
| 6 | VIN2 | Input supply for LDO2; decoupled with ≥1 µF ceramic capacitor to GND |
| 7 | VIN1 | Input supply for LDO1; electrically isolated from VIN2 for independent source selection |
| 8 | EN1 | Active-high enable for LDO1; internal 4 MΩ pull-down ensures default OFF state if left floating |
| EP | ePad | Exposed thermal pad; must be soldered to solid GND plane for thermal performance and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Independent Power Inputs | VIN1 and VIN2 accept separate sources (e.g., battery + USB), enabling flexible power domain isolation |
| Output Discharge Circuit | 25 Ω internal NFET per output discharges COUT on disable-prevents back-powering or latch-up in multi-rail systems |
| Enable Pull-Down Resistor | 4 MΩ internal resistor on EN1/EN2 guarantees safe shutdown during MCU reset or GPIO float |
| Stable with 1 µF Ceramic Cap | Eliminates need for large bulk capacitors-reduces BOM count and board area in ultra-thin designs |
| Thermal Shutdown Protection | Activates at +125°C junction temperature and auto-recovers after cooldown-ensures robustness under overload |
Applications
| Medical Wearable Sensor Hub | Smartphone Camera Module |
|---|---|
|
Use Scenario: Compact wearable patch monitoring ECG, SpO₂, and motion with Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Dual LDO supplies 2.8 V to analog front-end (AFE) and 2.8 V to BLE SoC-minimizing noise coupling between sensitive analog and digital domains. Use Value: 60 dB PSRR suppresses switching noise from shared battery rail; 37 µA quiescent current extends battery life beyond 12 months. |
Use Scenario: High-resolution camera module requiring clean, sequenced power for image sensor and ISP. IC Role / Device Role / Timing Role: Provides independent 2.8 V rails for sensor analog core and digital ISP logic-enabling staggered power-up to avoid inrush current peaks. Use Value: Auto-discharge on disable prevents residual voltage from interfering with sensor reset timing; 160 mV dropout allows operation from aging Li-ion cells. |
| Portable Diagnostic Handheld | Industrial IoT Edge Node |
|
Use Scenario: Battery-powered handheld ultrasound or glucose meter with LCD display and precision ADC. IC Role / Device Role / Timing Role: Delivers regulated 2.8 V to LCD bias circuit and 2.8 V to precision ADC reference-eliminating need for discrete filtering components. Use Value: ±2% accuracy ensures measurement repeatability across temperature; 1 µF stability enables use of 0402-size capacitors for minimal footprint. |
Use Scenario: Ruggedized edge node with LoRaWAN radio, environmental sensors, and microcontroller. IC Role / Device Role / Timing Role: Powers 2.8 V LoRa transceiver and 2.8 V sensor interface IC-supporting independent enable control for duty-cycled operation. Use Value: 0.05 µA shutdown current enables multi-year operation on primary lithium battery; -40°C to +125°C rating suits outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5399-SMYMX-TR | Fixed 3.3 V / 2.8 V dual outputs (vs. 2.8 V / 2.8 V); identical package, enable/discharge features | Suitable for mixed-voltage systems requiring 3.3 V I/O and 2.8 V core; not drop-in for same-voltage dual-rail | Select when system needs asymmetric rail voltages; verify compatibility with downstream 3.3 V logic levels |
| TPS7A2028PDBVR | Single 300 mA LDO (2.8 V), SOT-23-5; no dual output, no discharge, no enable pull-down | Requires two units for dual-rail; higher board area and BOM count; lacks auto-discharge for safe power sequencing | Use only if dual-channel integration is unnecessary and cost-per-rail is prioritized over layout efficiency |
Compared with MIC5399-MMYMX-TR, MIC5399-SMYMX-TR provides asymmetric voltage rails ideal for mixed-signal SoCs, while TPS7A2028PDBVR offers lower unit cost but increases PCB area and eliminates critical safety features like output discharge and enable pull-down-making it unsuitable for space-constrained, high-reliability portable designs.
Availability
MIC5399-MMYMX-TR is available at Aetrix Electronics and suitable for medical wearables, smartphone peripherals, and industrial IoT edge nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5399-MMYMX-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
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog, and interface solutions, with leadership in power management and embedded control.
The MIC5399 family is designed for ultra-compact, battery-powered portable electronics-delivering dual-rail LDO performance in sub-2 mm² packages with integrated safety and sequencing features.
FAQ
What output voltages does the MIC5399-MMYMX-TR provide?
The MIC5399-MMYMX-TR provides two fixed 2.8 V outputs-VOUT1 and VOUT2-as indicated by the "MM" voltage code in its part number. This configuration is factory-trimmed and requires no external feedback components. Both outputs maintain ±2% accuracy across –40°C to +125°C and deliver up to 300 mA each, making MIC5399-MMYMX-TR ideal for dual-rail applications where matched voltage rails are essential.
Does the MIC5399-MMYMX-TR include output discharge functionality?
Yes, the MIC5399-MMYMX-TR integrates an auto-discharge circuit on both outputs, activated when EN1 or EN2 is driven low. Each output connects to a 25 Ω internal NFET to ground, rapidly discharging external capacitors. This feature prevents residual voltage from causing back-powering or improper reset sequencing-critical in MIC5399-MMYMX-TR-based systems with multiple power domains or strict power-down requirements.
What is the purpose of the internal enable pull-down resistor in the MIC5399-MMYMX-TR?
The MIC5399-MMYMX-TR includes a 4 MΩ internal pull-down resistor on both EN1 and EN2 pins. This ensures the LDOs remain disabled during power-up, MCU reset, or GPIO float-eliminating risk of unintended power delivery. Unlike MIC5396/MIC5397 variants, MIC5399-MMYMX-TR does not require external pull-down resistors, simplifying layout and improving reliability in MIC5399-MMYMX-TR implementations where control signals may be unconnected or undefined.
Can the MIC5399-MMYMX-TR operate with ceramic output capacitors smaller than 10 µF?
Yes-the MIC5399-MMYMX-TR is optimized for stability with ≥1 µF X5R/X7R ceramic capacitors, as confirmed in the datasheet's Application Information section. Using 1 µF (or larger) meets all stability requirements and avoids oscillation. Larger values do not improve performance significantly, and Y5V/Z5U dielectrics are discouraged due to excessive capacitance loss over temperature. This 1 µF requirement directly benefits MIC5399-MMYMX-TR designs targeting minimal footprint and low BOM cost.
What package type and thermal characteristics apply to the MIC5399-MMYMX-TR?
The MIC5399-MMYMX-TR uses the 8-Lead Extra Thin DFN (X2DFN) package: 1.6 mm × 1.2 mm × 0.35 mm with an exposed thermal pad (ePad). Its junction-to-ambient thermal resistance (θJA) is 172.6°C/W. At 300 mA per channel with 3.6 V input and 2.8 V output, power dissipation reaches ~0.33 W-limiting max ambient temperature to ~68°C with minimum footprint layout. Proper ePad soldering to a GND plane is mandatory for MIC5399-MMYMX-TR thermal compliance.
MIC5399-MMYMX-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-XFDFN Exposed Pad
- 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):
- 2.8V, 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.38V @ 300mA, 0.38V @ 300mA
- Current - Output:
- 300mA, 300mA
- Current - Quiescent (Iq):
- 55 µA
- Current - Supply (Max):
- 130 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:
- 8-DFN (1.2x1.6)
MIC5399-MMYMX-TR FAQ
1.How can I place an order for MIC5399-MMYMX-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5399-MMYMX-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 MIC5399-MMYMX-TR reliable?
The price and inventory of MIC5399-MMYMX-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5399-MMYMX-TR is usually 5 days.
3.What payment methods are accepted for MIC5399-MMYMX-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5399-MMYMX-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5399-MMYMX-TR?
MIC5399-MMYMX-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5399-MMYMX-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 MIC5399-MMYMX-TR?
For technical support, including MIC5399-MMYMX-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5399-MMYMX-TR requirements.
6.How does Aetrix verify that MIC5399-MMYMX-TR is sourced from the original manufacturer or authorized distributors?
All MIC5399-MMYMX-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 MIC5399-MMYMX-TR meets industry standards.
7.What is the process for return or replacement of MIC5399-MMYMX-TR?
All MIC5399-MMYMX-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5399-MMYMX-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 MIC5399-MMYMX-TR part is unused and in its original packaging.
Return procedure for MIC5399-MMYMX-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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