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Microchip Technology MIC5399-MMYMX-T5
- Part No.:
- MIC5399-MMYMX-T5
- Manufacturer:
- Microchip Technology
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
MIC5399-MMYMX-T5.pdf
- Description:
- IC REG LINEAR 2.8V/2.8V 8DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC5399-MMYMX-T5 from Microchip Technology is a dual low-dropout linear regulator (LDO) 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, 37 µA typical quiescent current per LDO, and integrated output discharge circuitry. It is designed for space-constrained battery-powered portable electronics requiring stable dual-rail power with fast transient response.
For engineers reviewing the MIC5399-MMYMX-T5 datasheet, MIC5399-MMYMX-T5 pinout, MIC5399-MMYMX-T5 application, or MIC5399-MMYMX-T5 equivalent, key selection criteria include dual-output independence, auto-discharge capability on disable, internal enable pull-down, stability with 1 µF ceramic capacitors, and operation across –40°C to +125°C junction temperature range.
Technical Context
The MIC5399-MMYMX-T5 integrates two fully independent LDO regulators sharing only ground and package thermal mass - each with dedicated VIN, VOUT, and EN pins. Its architecture supports independent power inputs and enables simultaneous or staggered enable/disable control without cross-regulator interference.
It implements an internal 25 Ω NFET discharge path activated when either EN pin is low, ensuring rapid output capacitor discharge. The internal 4 MΩ enable pull-down resistor guarantees default-off behavior during tri-state control, eliminating external bias components required by earlier variants like MIC5396/MIC5397.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8 V / 2.8 V - Fixed dual-rail output; eliminates need for external feedback resistors and ensures matched rail timing in dual-core or I/O + core supply schemes. |
| Max Output Current | 300 mA per channel - Sustains full load on both outputs simultaneously; supports high-efficiency power partitioning in portable SoC subsystems. |
| Dropout Voltage | 160 mV at 300 mA - Enables regulation down to VIN = 2.96 V, extending usable battery life in single-cell Li-ion (2.8–4.2 V) applications. |
| Quiescent Current | 37 µA per LDO (typ.) - Minimizes standby power loss; critical for always-on sensor or RTC rails in ultra-low-power wake-up architectures. |
| Accuracy | ±2% over –40°C to +125°C - Ensures reliable voltage margin compliance for 2.8 V I/O standards (e.g., SDIO, USB PHY, LPDDR2) across industrial temperature range. |
| PSRR | 60 dB at 1 kHz - Suppresses switching noise from upstream DC/DC converters, preserving signal integrity in analog and RF-adjacent circuits. |
| Enable Input Logic | Active-high with 4 MΩ internal pull-down - Eliminates need for external pull-down resistors; prevents unintended turn-on during MCU reset or GPIO initialization. |
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. RoHS-compliant, Pb-free matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4 | GND | Common analog/digital ground reference; must be low-impedance connection to PCB ground plane and ePad for thermal and noise performance. |
| 2 | VOUT1 | Regulated 2.8 V output for Channel 1; requires ≥1 µF ceramic capacitor to GND for stability and transient response. |
| 3 | VOUT2 | Regulated 2.8 V output for Channel 2; electrically isolated from VOUT1; supports independent load sequencing and fault containment. |
| 5 | EN2 | Active-high enable for Channel 2; internal 4 MΩ pull-down ensures OFF state when un-driven; compatible with 1.2–5.5 V logic. |
| 6 | VIN2 | Input supply for Channel 2; may differ from VIN1 to optimize source impedance or battery tap point; requires local 1 µF decoupling. |
| 7 | VIN1 | Input supply for Channel 1; supports independent input sourcing (e.g., separate battery cell, DC/DC output, or PMIC rail). |
| 8 | EN1 | Active-high enable for Channel 1; identical internal pull-down and voltage thresholds as EN2; enables independent power gating per rail. |
| EP | ePad | Exposed thermal pad; must be soldered to solid GND copper area with ≥4 thermal vias for effective heat dissipation and junction temperature control. |
Key Features
| Feature | Design Value |
|---|---|
| Output Discharge Circuit | 25 Ω internal NFET per channel - Discharges output caps within microseconds upon disable, preventing back-powering or latch-up in multi-rail systems. |
| Internal Enable Pull-Down | 4 MΩ resistor on EN1/EN2 - Guarantees safe power-down during boot, reset, or firmware hang; removes need for external BOM components. |
| Stability with 1 µF Ceramic Cap | Validated with X5R/X7R dielectrics - Reduces board area and cost vs. traditional 10–22 µF tantalum solutions; simplifies layout in dense portable designs. |
| Low Dropout at Full Load | 160 mV @ 300 mA - Maintains regulation through deep battery discharge (e.g., down to 2.96 V on 2.8 V rail), maximizing runtime in single-cell systems. |
| Thermal Shutdown & Current Limit | Internally protected up to +125°C junction; 400–900 mA current limit - Prevents damage during short-circuit or overload without external protection circuitry. |
Applications
| Smartphone Baseband Power | Portable Medical Sensor Hub |
|---|---|
Use Scenario: Dual-rail supply for baseband processor (2.8 V core) and RF transceiver interface (2.8 V I/O), powered from shared Li-ion battery. IC Role / Device Role / Timing Role: Independent dual LDO providing isolated, low-noise, sequenced power rails with fast turn-on/off control for sleep/wake transitions. Use Value: Enables precise rail sequencing and rapid discharge between modes, reducing system-level leakage and improving battery life by >15% in idle states. |
Use Scenario: Powering ECG front-end amplifier (2.8 V analog) and Bluetooth LE microcontroller (2.8 V digital) in wearable patch monitor. IC Role / Device Role / Timing Role: Dual LDO delivering clean, low-ripple supplies with independent enable control for analog/digital domain isolation and dynamic power gating. Use Value: PSRR of 60 dB suppresses switching noise from companion DC/DC, maintaining <10 µV RMS noise floor required for clinical-grade biopotential measurement. |
| DSC Image Signal Processor | Industrial Handheld Scanner |
Use Scenario: Supplying 2.8 V to CMOS image sensor and 2.8 V to ISP ASIC in digital still camera module with tight PCB area constraints. IC Role / Device Role / Timing Role: Compact dual LDO replacing two discrete regulators; supports independent reset sequencing and brown-out detection per rail. Use Value: Use Value: 1.6 mm × 1.2 mm X2DFN footprint saves >40% board area vs. two 0.8 mm pitch SOT-23-5 regulators; ePad enables thermal management at 600 mW dissipation. |
Use Scenario: Providing regulated 2.8 V for laser diode driver and 2.8 V for ARM Cortex-M4 host MCU in rugged barcode scanner with wide ambient temperature range. IC Role / Device Role / Timing Role: Industrial-grade dual LDO supporting –40°C to +125°C operation with guaranteed ±2% accuracy and thermal shutdown. Use Value: Internal pull-down and auto-discharge prevent false triggering during cold start or vibration-induced contact bounce in handheld operation. |
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-T5 | Fixed 3.3 V / 2.8 V dual outputs; same package, enable/discharge features, and specs. | Required where mixed-voltage SoC interfaces (e.g., 3.3 V SPI flash + 2.8 V sensor) replace matched 2.8 V rails. | Select when system requires asymmetric dual-rail voltages; shares identical layout, thermal, and control interface with MIC5399-MMYMX-T5. |
| MIC5399-GMYMX-T5 | Fixed 1.8 V / 2.8 V outputs; otherwise identical electrical and mechanical specifications. | Suitable for low-power MCU cores (1.8 V) paired with 2.8 V peripherals (e.g., display, audio codec) in sub-1 W portable devices. | Choose for heterogeneous voltage domains; pinout and enable behavior match exactly - no layout change needed. |
Compared with MIC5399-SMYMX-T5 and MIC5399-GMYMX-T5, the MIC5399-MMYMX-T5 provides matched 2.8 V rails ideal for dual-sensor, dual-interface, or redundant subsystems where rail symmetry simplifies power sequencing, reduces BOM count, and avoids inter-rail coupling issues.
Availability
MIC5399-MMYMX-T5 is available at Aetrix Electronics and suitable for smartphones, portable medical devices, digital still cameras, and industrial handheld scanners requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MIC5399-MMYMX-T5 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 Inc. is a leading provider of microcontrollers, analog, FPGA, and power management semiconductors, serving automotive, industrial, communications, and consumer markets with vertically integrated design and manufacturing.
The MIC5399 family belongs to Microchip's low-power dual LDO product line, engineered specifically for space- and efficiency-critical portable electronics needing independent, highly accurate, and rapidly controllable dual-rail regulation in sub-2 mm² packages.
FAQ
What is the output voltage configuration of the MIC5399-MMYMX-T5?
The MIC5399-MMYMX-T5 delivers two fixed 2.8 V outputs - VOUT1 and VOUT2 - as defined by its "MM" voltage option code. This matched dual-rail configuration eliminates external feedback networks and supports symmetric power domains for sensors, interfaces, or redundant subsystems without voltage mismatch concerns.
Does the MIC5399-MMYMX-T5 require external pull-down resistors on its enable pins?
No. The MIC5399-MMYMX-T5 integrates a 4 MΩ internal pull-down resistor on both EN1 and EN2 pins, ensuring automatic disable when control signals are floating or undriven. This feature removes the need for external components and guarantees safe power-down during MCU reset or initialization sequences.
How does the output discharge function operate in the MIC5399-MMYMX-T5?
When either EN1 or EN2 is driven low, the MIC5399-MMYMX-T5 activates an internal 25 Ω NFET between the corresponding VOUT pin and GND. This discharges the output capacitor rapidly - typically within tens of microseconds - preventing back-powering, latch-up, or unintended wake-up in multi-rail systems.
What capacitor values are required for stable operation of the MIC5399-MMYMX-T5?
The MIC5399-MMYMX-T5 is optimized for 1 µF X5R or X7R ceramic capacitors on both input (VIN1/VIN2) and output (VOUT1/VOUT2) nodes. Larger values do not improve stability or transient response; Y5V/Z5U dielectrics are discouraged due to excessive capacitance drift over temperature.
Is the MIC5399-MMYMX-T5 suitable for automotive applications?
The MIC5399-MMYMX-T5 is rated for –40°C to +125°C junction temperature and meets industrial reliability standards, but it is not AEC-Q200 qualified. For automotive applications requiring qualification, consult Microchip's AEC-Q200-certified LDO portfolio; this device is intended for industrial, medical, and consumer portable equipment.
MIC5399-MMYMX-T5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-XFDFN Exposed Pad
- 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):
- 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-T5 FAQ
1.How can I place an order for MIC5399-MMYMX-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5399-MMYMX-T5 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-T5 reliable?
The price and inventory of MIC5399-MMYMX-T5 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-T5 is usually 5 days.
3.What payment methods are accepted for MIC5399-MMYMX-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5399-MMYMX-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5399-MMYMX-T5?
MIC5399-MMYMX-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5399-MMYMX-T5 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-T5?
For technical support, including MIC5399-MMYMX-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5399-MMYMX-T5 requirements.
6.How does Aetrix verify that MIC5399-MMYMX-T5 is sourced from the original manufacturer or authorized distributors?
All MIC5399-MMYMX-T5 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-T5 meets industry standards.
7.What is the process for return or replacement of MIC5399-MMYMX-T5?
All MIC5399-MMYMX-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC5399-MMYMX-T5, 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-T5 part is unused and in its original packaging.
Return procedure for MIC5399-MMYMX-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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