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Microchip Technology MIC5356-S4YMME-TR
- Part No.:
- MIC5356-S4YMME-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MIC5356-S4YMME-TR.pdf
- Description:
- IC REG LINEAR 1.2V/3.3V 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,756
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Product details
Overview
MIC5356-S4YMME-TR from Micrel is a dual-channel, micropower, low-dropout linear regulator delivering two independently enabled 500mA LDO outputs with fixed 3.3V and 1.2V outputs in an 8-pin ePad MSOP package. It operates from 2.5V to 5.5V input, achieves 2% output accuracy, maintains stability with only 2.2µF ceramic capacitors, and features active output discharge (30Ω) on disable - ideal for battery-powered portable electronics requiring fast transient response and ultra-low quiescent current.
For engineers reviewing the MIC5356-S4YMME-TR datasheet, MIC5356-S4YMME-TR pinout, MIC5356-S4YMME-TR application, or MIC5356-S4YMME-TR equivalent, this page delivers verified specifications, thermal-aware package details, real-world load/line transient behavior, and validated alternative options for dual-rail power management in space-constrained designs.
Technical Context
The MIC5356-S4YMME-TR integrates two independent CMOS-based LDO regulators with active-high enable inputs (EN1/EN2), each supporting up to 500mA continuous output. Its µCap architecture enables stable operation with 2.2µF low-ESR ceramic capacitors on both input and output, eliminating need for bulk electrolytics.
Unlike the MIC5355 variant, the MIC5356-S4YMME-TR includes dedicated auto-discharge circuitry per output - a 30Ω internal NFET that pulls down VOUT1 and VOUT2 when respective EN pins are driven low, preventing floating rails and enabling controlled power sequencing in multi-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Pair | 3.3V / 1.2V - fixed, factory-trimmed outputs suitable for core I/O rail separation in SoC/FPGA applications. |
| Max Output Current | 500mA per channel - supports simultaneous high-current loads such as RF transceivers and memory interfaces without thermal derating at ambient ≤70°C. |
| Dropout Voltage | 350mV typical at 500mA - enables regulation from 3.65V input to 3.3V rail and 1.55V input to 1.2V rail, maximizing battery runtime. |
| Quiescent Current | 70µA typical with both outputs enabled - extends battery life in always-on subsystems like GPS receivers or sensor hubs. |
| Shutdown Current | <1µA typical - ensures negligible leakage during deep sleep modes in portable devices. |
| PSRR | 60dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Capacitor Requirement | 2.2µF ceramic minimum - allows compact, low-profile decoupling using standard 0402 X5R/X7R MLCCs. |
Pinout & Package
Package: 8-pin ePad MSOP (MME), thermally enhanced with exposed heatsink pad (HSPAD) requiring connection to PCB ground plane via thermal vias for optimal thermal performance (θJA = 64.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Supply Input | Common input for both LDOs; must be bypassed with ≥2.2µF ceramic capacitor to GND. |
| GND | Ground Reference | Analog/digital ground return; connects directly to HSPAD for lowest impedance path. |
| NC | No Connect | Pins 3 and 6 are unconnected internally - must remain unpopulated or left floating (no tie). |
| EN2 | LDO2 Enable Input | Active-high logic control for 1.2V output; drives internal NFET discharge when pulled low. |
| EN1 | LDO1 Enable Input | Active-high logic control for 3.3V output; independent of EN2 for flexible power sequencing. |
| VOUT2 | LDO2 Output | Fixed 1.2V regulated output; sourced from dedicated pass device with 30Ω auto-discharge path. |
| VOUT1 | LDO1 Output | Fixed 3.3V regulated output; sourced from dedicated pass device with 30Ω auto-discharge path. |
| HSPAD | Heatsink Pad | Exposed copper pad on bottom of package; must be soldered to solid GND plane with ≥4 thermal vias (0.3–0.35mm Ø) for thermal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 allow staggered startup/shutdown of 3.3V and 1.2V rails - critical for FPGA configuration sequencing and processor core/I/O voltage ordering. |
| Auto-discharge circuitry | 30Ω internal NFET per output actively discharges VOUT1/VOUT2 when disabled - prevents latch-up in downstream logic and eliminates need for external bleed resistors. |
| µCap stability | Stable with 2.2µF ceramic output capacitors - reduces board area, cost, and ESR-related instability vs. traditional tantalum solutions. |
| Low dropout at full load | 350mV typical dropout at 500mA - enables higher efficiency and longer battery life in 3.6V Li-ion systems powering both 3.3V and 1.2V domains. |
| Thermal shutdown & current limit | Integrated protection triggers at ~1050mA per channel and junction >125°C - prevents damage during short-circuit or overload events without external components. |
Applications
| Smartphone Baseband Power | Portable GPS Receiver |
|---|---|
Use Scenario: Dual-rail power for application processor (3.3V I/O) and ARM core (1.2V), with strict sequencing and fast wake-from-sleep transitions. IC Role / Device Role / Timing Role: Primary dual-LDO regulator providing clean, sequenced, and discharged rails during mode transitions. Use Value: Enables reliable boot and low-power retention by guaranteeing 1.2V rail discharge before 3.3V re-enabling - avoids bus contention and latch-up. |
Use Scenario: Compact GNSS module requiring ultra-low quiescent current during satellite acquisition and cold-start phases. IC Role / Device Role / Timing Role: Micropower dual LDO supplying RF front-end (3.3V) and baseband ASIC (1.2V) from single-cell Li-ion. Use Value: 70µA operating current and <1µA shutdown extend battery life beyond 100 hours in tracking mode while maintaining fast turn-on (<125µs). |
| Notebook Subsystem Regulator | Digital Camera Image Sensor Bias |
Use Scenario: Standalone power for embedded controller (EC), keyboard backlight driver, and USB-C PD interface logic in ultrabook chassis. IC Role / Device Role / Timing Role: Secondary dual-LDO managing auxiliary rails independent of main CPU VRM. Use Value: Independent EN1/EN2 control allows EC to power-cycle peripherals without resetting host CPU - improves system responsiveness and firmware update safety. |
Use Scenario: Low-noise bias supply for CMOS image sensor analog front-end (3.3V AVDD) and digital core (1.2V DVDD) in DSLR or action cam. IC Role / Device Role / Timing Role: Dual LDO delivering quiet, well-regulated, and synchronized power with sub-150µVRMS noise. Use Value: 146µVRMS integrated output noise and excellent PSRR preserve SNR in high-resolution imaging - no additional filtering required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5355-S4YMME-TR | No auto-discharge circuit; identical pinout, package, and electrical specs except missing 30Ω discharge path. | Suitable where rail discharge is handled externally or unnecessary (e.g., non-sequenced I/O banks). | Select when lower BOM count is prioritized and discharge timing is managed by system-level logic. |
| TPL7407LPGEDR | Single 7-channel high-side driver (not LDO); different function, package (16-pin HTSSOP), and no voltage regulation capability. | Not functionally equivalent - used for LED/relay driving, not power regulation. | Not a valid alternative; included only as common mis-selection due to similar naming - verify function before substitution. |
Compared with MIC5355-S4YMME-TR, the MIC5356-S4YMME-TR adds essential auto-discharge for safe multi-rail sequencing but shares identical footprint, enable logic, and output accuracy - making it the preferred choice for portable systems requiring controlled power-down. The TPL7407LPGEDR serves a completely different purpose and cannot replace the MIC5356-S4YMME-TR in regulation applications.
Availability
MIC5356-S4YMME-TR is available at Aetrix Electronics and suitable for smartphone baseband power, portable GPS receivers, and notebook subsystem regulation requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.
Supply support for MIC5356-S4YMME-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. Known for high-performance LDOs and Ethernet PHYs.
The MIC5356 belongs to Micrel's µCap dual-LDO family, designed specifically for space-constrained, battery-operated portable electronics needing independent, low-noise, and fast-transient dual-rail regulation with minimal external components.
FAQ
What is the output voltage configuration of the MIC5356-S4YMME-TR?
The MIC5356-S4YMME-TR provides fixed dual outputs: 3.3V on VOUT1 and 1.2V on VOUT2. These voltages are factory-trimmed to ±2% initial accuracy and remain stable across load, line, and temperature variations per the datasheet specifications. No external feedback resistors are required - the configuration is hard-coded in silicon and matches the "S4" ordering code in the part number.
Does the MIC5356-S4YMME-TR include auto-discharge functionality?
Yes, the MIC5356-S4YMME-TR includes dedicated auto-discharge circuitry for both outputs - a 30Ω internal NFET connects VOUT1 and VOUT2 to GND when their respective EN1 or EN2 pins are driven low. This feature is exclusive to the MIC5356 series and is absent in the MIC5355 variants. It ensures rapid, controlled discharge of output capacitance during shutdown, preventing unintended logic states in downstream circuits.
What package type and thermal requirements apply to the MIC5356-S4YMME-TR?
The MIC5356-S4YMME-TR uses the 8-pin ePad MSOP (MME) package with an exposed thermal pad (HSPAD). For reliable operation at full 500mA per channel, the HSPAD must be soldered to a solid PCB ground plane and connected via ≥4 thermal vias (0.3–0.35mm diameter) to maximize heat dissipation. Its junction-to-ambient thermal resistance is 64.4°C/W, limiting maximum ambient temperature to ~70°C under worst-case 500mA/500mA load conditions.
Can the MIC5356-S4YMME-TR operate with only 2.2µF output capacitors?
Yes, the MIC5356-S4YMME-TR is specifically optimized for µCap stability and requires only 2.2µF ceramic output capacitors per rail - no additional bulk capacitance is needed. This is validated across temperature and load conditions using X5R or X7R dielectrics. Using Y5V or Z5U capacitors is discouraged due to excessive capacitance loss over temperature, which may compromise stability.
How does the MIC5356-S4YMME-TR handle overcurrent or overtemperature events?
The MIC5356-S4YMME-TR integrates foldback current limiting (trip point 525–1050mA per channel) and thermal shutdown (triggering above 125°C junction temperature). During overload, it reduces output current to limit power dissipation; if temperature continues rising, it shuts down completely until junction cools. Both protections are fully internal - no external components are required for safe operation under fault conditions.
MIC5356-S4YMME-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 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):
- 1.2V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.8V @ 500mA, 0.8V @ 500mA
- Current - Output:
- 500mA, 500mA
- Current - Quiescent (Iq):
- 0.53 µA
- Current - Supply (Max):
- 200 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-MSOP-EP
MIC5356-S4YMME-TR FAQ
1.How can I place an order for MIC5356-S4YMME-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5356-S4YMME-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 MIC5356-S4YMME-TR reliable?
The price and inventory of MIC5356-S4YMME-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5356-S4YMME-TR is usually 5 days.
3.What payment methods are accepted for MIC5356-S4YMME-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5356-S4YMME-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5356-S4YMME-TR?
MIC5356-S4YMME-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5356-S4YMME-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 MIC5356-S4YMME-TR?
For technical support, including MIC5356-S4YMME-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5356-S4YMME-TR requirements.
6.How does Aetrix verify that MIC5356-S4YMME-TR is sourced from the original manufacturer or authorized distributors?
All MIC5356-S4YMME-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 MIC5356-S4YMME-TR meets industry standards.
7.What is the process for return or replacement of MIC5356-S4YMME-TR?
All MIC5356-S4YMME-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5356-S4YMME-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 MIC5356-S4YMME-TR part is unused and in its original packaging.
Return procedure for MIC5356-S4YMME-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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