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Microchip Technology MIC5399-GMYMX-T5
- Part No.:
- MIC5399-GMYMX-T5
- Manufacturer:
- Microchip Technology
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
MIC5399-GMYMX-T5.pdf
- Description:
- IC REG LINEAR 1.8V/2.8V 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,479
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Product details
Overview
MIC5399-GMYMX-T5 from Microchip Technology is a dual low-dropout linear regulator (LDO) with independent 300 mA outputs, 1.8V/2.8V fixed output voltages, ±2% output accuracy, and 160 mV dropout at full load-designed for space-constrained portable electronics requiring clean, sequenced dual-rail power.
For engineers reviewing the MIC5399-GMYMX-T5 datasheet, MIC5399-GMYMX-T5 pinout, MIC5399-GMYMX-T5 application, or MIC5399-GMYMX-T5 equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and stability behavior, and real-world substitution guidance for battery-powered medical devices, smartphones, and GPS modules.
Technical Context
The MIC5399-GMYMX-T5 integrates two fully independent LDOs sharing only ground and package-each with dedicated input (VIN1/VIN2), output (VOUT1/VOUT2), and enable (EN1/EN2) pins. Its architecture supports independent power sequencing, no-load stability, and simultaneous operation across –40°C to +125°C junction temperature.
It features dual on-chip protection: thermal shutdown and current limiting (630 mA typical), plus two distinguishing functional blocks-output discharge circuitry (25 Ω NFET per output when disabled) and internal 4 MΩ enable pull-down resistors-ensuring safe, deterministic off-state behavior without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V (LDO1) / 2.8 V (LDO2) - fixed, factory-trimmed outputs eliminating external feedback networks. |
| Output Current | 300 mA per channel - supports dual-core processors or RF + baseband subsystems without derating at 25°C. |
| Dropout Voltage | 160 mV at 300 mA - enables regulation from 2.5 V input down to 1.8 V rail, critical for Li-ion battery discharge tail-end operation. |
| Ground Current | 74 µA typical (both LDOs enabled, no load) - minimizes quiescent drain in always-on system states. |
| PSRR | 60 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding VIN1/VIN2. |
| Operating Temp | –40°C to +125°C junction - qualified for industrial and automotive cabin-temperature applications. |
| Package | 8-Lead Extra Thin DFN (X2DFN), 1.6 mm × 1.2 mm × 0.35 mm - ultra-low profile for thin mobile PCBs with exposed thermal pad. |
Pinout & Package
Package: 8-Lead Extra Thin DFN (X2DFN), 1.6 mm × 1.2 mm body, 0.35 mm height, exposed thermal pad (ePad) - RoHS-compliant, Pb-free matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4 | GND | Common analog/digital ground reference for both regulators; must be connected directly to PCB ground plane via ePad and vias. |
| 2 | VOUT1 | 1.8 V regulated output; requires ≥1 µF ceramic capacitor to GND for stability; supplies core logic or sensor rails. |
| 3 | VOUT2 | 2.8 V regulated output; requires ≥1 µF ceramic capacitor to GND; powers RF front-end or display interface circuits. |
| 5 | EN2 | Active-high enable for LDO2; internal 4 MΩ pull-down ensures OFF state if left unconnected; supports power sequencing control. |
| 6 | VIN2 | Input supply for LDO2; accepts 2.5–5.5 V; decoupling capacitor required between VIN2 and GND. |
| 7 | VIN1 | Input supply for LDO1; accepts 2.5–5.5 V; independent of VIN2-enables use of separate battery or DC-DC sources. |
| 8 | EN1 | Active-high enable for LDO1; internal 4 MΩ pull-down ensures OFF state if left unconnected; enables independent wake-up control. |
| EP | ePad | Exposed thermal pad; must be soldered to solid ground plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Output Discharge Circuit | 25 Ω internal NFET per output activated on disable-fully discharges 1 µF output caps in <1 ms, preventing residual voltage hold-up in power-down sequences. |
| Enable Pull-Down Resistor | 4 MΩ internal resistor on EN1/EN2-guarantees LDOs remain OFF during MCU reset or floating control lines, eliminating need for external pull-downs. |
| Ceramic Cap Stability | Stable with ≥1 µF X5R/X7R ceramic capacitors-reduces BOM count and board area vs. legacy LDOs requiring tantalum or larger ceramics. |
| No-Load Regulation | Maintains regulation and accuracy at 0 mA load-enables use in standby modes where one or both outputs drive high-impedance inputs only. |
| Low Dropout Performance | 80 mV typical dropout at 150 mA-extends usable battery life by enabling deeper discharge before brownout in single-cell systems. |
Applications
| Smartphone Power Management | Portable Medical Sensor Hub |
|---|---|
|
Use Scenario: Dual-rail power for application processor core (1.8 V) and cellular modem interface (2.8 V) in slim-profile handsets. IC Role / Device Role / Timing Role: Independent LDO providing isolated, low-noise, sequenced voltage rails with fast turn-on (<125 µs) for boot-time coordination. Use Value: Eliminates need for discrete enable sequencing logic and external discharge FETs-reducing component count by ≥4 parts per rail. |
Use Scenario: Powering ECG analog front-end (1.8 V) and Bluetooth LE radio (2.8 V) in wearable patch monitors. IC Role / Device Role / Timing Role: Dual LDO delivering ultra-low ground current (74 µA typ.) and high PSRR (60 dB) to preserve signal integrity and extend battery life. Use Value: Output discharge ensures rapid shutdown of BLE radio upon disconnect-preventing false wake-ups and extending shelf life beyond 12 months. |
| GPS/GLONASS Module Supply | Industrial Handheld Scanner |
|
Use Scenario: Providing clean 1.8 V for GNSS baseband IC and 2.8 V for RF transceiver in battery-operated asset trackers. IC Role / Device Role / Timing Role: Dual LDO with independent enable pins enabling dynamic power gating of RF section while keeping baseband active for cold-start acquisition. Use Value: 160 mV dropout allows operation down to 2.5 V input-supporting full GPS functionality until Li-ion cell reaches 2.7 V under load. |
Use Scenario: Powering barcode imager ASIC (1.8 V) and motor driver logic (2.8 V) in ruggedized warehouse scanners. IC Role / Device Role / Timing Role: Dual LDO with thermal shutdown and current limit protecting against motor stall-induced overloads on VIN2 rail. Use Value: Internal enable pull-down prevents unintended motor activation during MCU boot-meeting IEC 61000-4-2 ESD immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5397-GPYMX-T5 | LDO1 = 1.8 V, LDO2 = 3.0 V; includes output discharge but no enable pull-down. | Suitable where higher second rail is needed (e.g., 3.0 V SDIO interface), but requires external pull-down on EN pins for tri-state safety. | Select when 3.0 V rail is mandatory and system design accommodates external enable biasing. |
| MIC5398-P4YMX-T5 | LDO1 = 3.0 V, LDO2 = 1.2 V; includes enable pull-down but no output discharge. | Fits low-voltage core logic (1.2 V) + I/O rail (3.0 V) configurations; lacks auto-discharge-requires external circuitry for rapid cap bleed-down. | Choose for 1.2 V processor core supply where discharge timing is non-critical and layout space permits discrete FET solution. |
Compared with MIC5397-GPYMX-T5 and MIC5398-P4YMX-T5, the MIC5399-GMYMX-T5 uniquely combines both output discharge and enable pull-down in a single 1.8 V/2.8 V configuration-reducing design risk and component count for portable systems requiring guaranteed safe power-down behavior.
Availability
MIC5399-GMYMX-T5 is available at Aetrix Electronics and suitable for smartphones, portable medical sensors, and GPS modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5399-GMYMX-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 mixed-signal semiconductors, serving industrial, automotive, communications, and consumer markets with vertically integrated design and manufacturing.
The MIC5399 belongs to Microchip's low-power dual LDO family, engineered specifically for space- and power-constrained portable electronics needing independent, sequenced, and safely discharged dual-rail regulation.
FAQ
What are the fixed output voltages of the MIC5399-GMYMX-T5?
The MIC5399-GMYMX-T5 provides factory-trimmed, fixed output voltages of 1.8 V on VOUT1 and 2.8 V on VOUT2. These values are specified in Microchip's Product Identification System (GM = 1.8V/2.8V) and confirmed in the Electrical Characteristics table of DS20006264C. No external feedback resistors are required or supported.
Does the MIC5399-GMYMX-T5 require external pull-down resistors on its enable pins?
No. The MIC5399-GMYMX-T5 integrates a 4 MΩ internal pull-down resistor on both EN1 and EN2 pins, ensuring the LDOs remain disabled when control signals are tri-stated or unconnected. This eliminates the need for external pull-down components and simplifies power sequencing in systems with open-drain or high-impedance MCU GPIOs.
How does the output discharge feature work on the MIC5399-GMYMX-T5?
When either EN1 or EN2 is driven low, the MIC5399-GMYMX-T5 activates an internal 25 Ω NFET between the corresponding VOUT pin and GND. This discharges the output capacitor rapidly-typically clearing a 1 µF cap within 1 ms-preventing residual voltage that could cause latch-up or false wake-up in downstream circuitry.
What is the minimum input voltage required for the MIC5399-GMYMX-T5 to regulate at full load?
To maintain regulation at 300 mA load, the MIC5399-GMYMX-T5 requires VIN ≥ VOUT + dropout voltage. For VOUT1 = 1.8 V and max dropout = 190 mV (per datasheet), minimum VIN1 = 1.99 V-but the absolute operating range starts at 2.5 V. Thus, 2.5 V is the guaranteed minimum input for full 300 mA operation across temperature and process variation.
Can the MIC5399-GMYMX-T5 be used with ceramic output capacitors smaller than 1 µF?
No. The MIC5399-GMYMX-T5 is optimized for stability with ≥1 µF X5R or X7R ceramic capacitors on each output. Using smaller values risks oscillation or poor transient response, as confirmed in Section 4.2 of DS20006264C. The device remains stable at no load, but capacitance below 1 µF is not characterized or guaranteed.
MIC5399-GMYMX-T5 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):
- 1.8V, 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-GMYMX-T5 FAQ
1.How can I place an order for MIC5399-GMYMX-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5399-GMYMX-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-GMYMX-T5 reliable?
The price and inventory of MIC5399-GMYMX-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-GMYMX-T5 is usually 5 days.
3.What payment methods are accepted for MIC5399-GMYMX-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5399-GMYMX-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5399-GMYMX-T5?
MIC5399-GMYMX-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5399-GMYMX-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-GMYMX-T5?
For technical support, including MIC5399-GMYMX-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5399-GMYMX-T5 requirements.
6.How does Aetrix verify that MIC5399-GMYMX-T5 is sourced from the original manufacturer or authorized distributors?
All MIC5399-GMYMX-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-GMYMX-T5 meets industry standards.
7.What is the process for return or replacement of MIC5399-GMYMX-T5?
All MIC5399-GMYMX-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC5399-GMYMX-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-GMYMX-T5 part is unused and in its original packaging.
Return procedure for MIC5399-GMYMX-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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