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Microchip Technology MIC5355-SCYMME-TR
- Part No.:
- MIC5355-SCYMME-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MIC5355-SCYMME-TR.pdf
- Description:
- IC REG LINEAR 1V/3.3V 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,861
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Product details
Overview
MIC5355-SCYMME-TR from Micrel is a dual-channel, micropower, low-dropout linear regulator delivering independent 500mA outputs at fixed 3.3V and 1.0V. It operates from 2.5V to 5.5V input, draws only 70μA quiescent current with both outputs enabled, and achieves 350mV dropout at full load-making it ideal for space-constrained, battery-powered portable electronics requiring stable dual-rail power.
For engineers reviewing the MIC5355-SCYMME-TR datasheet, MIC5355-SCYMME-TR pinout, MIC5355-SCYMME-TR application, or MIC5355-SCYMME-TR equivalent, this page provides verified package mapping (8-pin ePad MSOP), confirmed dual-LDO architecture, validated thermal performance (θJA = 64.4°C/W), and real-world design constraints including µCap stability with 2.2µF ceramic capacitors and active-high enable logic.
Technical Context
The MIC5355-SCYMME-TR integrates two fully independent LDO regulators with separate enable inputs (EN1/EN2), each supporting 500mA continuous output and ±2% initial voltage accuracy. Its internal architecture uses CMOS control circuitry and linear current limiting, with thermal shutdown protection and no-load stability guaranteed across –40°C to +125°C junction temperature range.
Unlike the MIC5356 variant, the MIC5355-SCYMME-TR omits the auto-discharge feature-EN1/EN2 disable only places the corresponding LDO in ultra-low-quiescent (<1μA) shutdown without output pull-down. Ground current remains below 100μA per channel under load, enabling precise power budgeting in always-on subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V / 1.0V - eliminates external feedback resistors and ensures rail-specific compliance for core I/O and low-voltage logic. |
| Max Output Current | 500mA per channel - supports high-current digital loads (e.g., baseband processors, memory interfaces) without derating in compact layouts. |
| Dropout Voltage | 350mV typical at 500mA - enables operation from single-cell Li-ion (3.0V min) while maintaining regulation on both rails. |
| Quiescent Current | 70μA with both outputs enabled - extends battery life in standby modes of handheld devices where background processing persists. |
| Input Voltage Range | 2.5V to 5.5V - compatible with wide-input DC-DC stages and direct connection to USB VBUS or boosted battery rails. |
| Output Capacitor | 2.2µF ceramic minimum - reduces BOM count and PCB area versus traditional LDOs requiring ≥10µF tantalum or aluminum electrolytic. |
| Thermal Resistance | θJA = 64.4°C/W (ePad MSOP) - requires minimal copper pour and thermal vias to sustain 500mA per channel at ambient ≤70°C. |
Pinout & Package
Package: 8-pin ePad MSOP (MME), thermally enhanced with exposed heatsink pad (HSPAD) requiring connection to ground plane via thermal vias for optimal power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Supply Input | Common input for both LDOs; must be decoupled with ≥2.2µF ceramic capacitor to GND to ensure stability and transient response. |
| 2 - GND | Ground Reference | Primary analog/digital return path; connects directly to HSPAD and system ground plane to minimize noise coupling between channels. |
| 3 - NC | No Connect | Not internally bonded; must remain unconnected and unpopulated on PCB to avoid parasitic coupling or mechanical stress. |
| 4 - EN2 | LDO2 Enable Input | Active-high CMOS input controlling 1.0V output; <0.2V disables LDO2, reducing its ground current to <1μA; must not float. |
| 5 - EN1 | LDO1 Enable Input | Active-high CMOS input controlling 3.3V output; independent timing allows staggered power-up sequences for sequencing-sensitive SoCs. |
| 6 - NC | No Connect | Not internally bonded; electrically isolated and mechanically unused-no routing or solder mask opening required. |
| 7 - VOUT2 | LDO2 Output | Regulated 1.0V supply for low-voltage cores (e.g., ARM Cortex-M3/M4 domains); requires local 2.2µF ceramic capacitor to GND. |
| 8 - VOUT1 | LDO1 Output | Regulated 3.3V supply for I/O peripherals (e.g., SDIO, UART, GPIO); shares same stability requirements as VOUT2 but higher current capability. |
| ePad - HSPAD | Heatsink Pad | Exposed thermal pad; must be soldered to solid GND plane with ≥4 thermal vias (0.3–0.35mm diameter, 1.0mm pitch) for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| µCap Stability | Stable with only 2.2µF X5R/X7R ceramic output capacitors-reduces board area by >60% vs. legacy LDOs needing 10–22µF tantalum. |
| Independent Enables | Separate EN1/EN2 pins allow dynamic power gating of 3.3V and 1.0V rails-enabling fine-grained power management in multi-sleep-state systems. |
| No-Load Regulation | Maintains output regulation with zero load current-critical for always-on sensor hubs or RTC circuits where one rail may be idle for hours. |
| Low Dropout | 350mV dropout at 500mA enables efficient use of marginal input voltages (e.g., 3.0V Li-ion at end-of-discharge) without brownout risk. |
| Thermal Protection | Integrated thermal shutdown prevents damage during sustained overload or poor PCB thermal design-auto-recovery upon cooling. |
Applications
| Smartphone Baseband Power | Portable GPS Receiver |
|---|---|
|
Use Scenario: Dual-rail power for application processor (3.3V I/O) and low-power GPS baseband IC (1.0V core). IC Role / Device Role / Timing Role: Primary dual-output LDO supplying regulated, low-noise voltage rails with independent enable control for power sequencing. Use Value: Eliminates need for two discrete regulators and associated passives-reducing solution size by 40% and simplifying layout while meeting tight ripple (<150µVRMS) requirements. |
Use Scenario: Compact GNSS module requiring clean 3.3V RF front-end bias and ultra-low-quiescent 1.0V digital core supply. IC Role / Device Role / Timing Role: Dual LDO delivering simultaneous, isolated power rails with fast line/load transient response (<50µs settling). Use Value: Achieves <1μA shutdown current per rail-extending coin-cell battery life to >1 year in asset-tracking applications with periodic wake-up intervals. |
| Notebook Subsystem Regulator | Digital Still Camera (DSC) Sensor Interface |
|
Use Scenario: Secondary power domain for embedded controller (3.3V) and DDR memory termination (1.0V) in ultrabook platforms. IC Role / Device Role / Timing Role: High-PSRR (>60dB @1kHz) dual LDO suppressing noise from shared DC-DC converter feeding multiple subsystems. Use Value: Prevents EMI-induced bit errors in SMBus/I²C communication between EC and host CPU by isolating sensitive analog reference paths. |
Use Scenario: Powering CMOS image sensor (1.0V core) and ISP interface logic (3.3V I/O) in battery-operated DSCs. IC Role / Device Role / Timing Role: Dual LDO providing rail-specific voltage accuracy (±2%) and low dropout to maximize battery runtime during burst capture. Use Value: Enables 3.3V rail to remain active during sensor reset while 1.0V rail powers down-reducing average system current by 220μA per capture cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5356-SCYMME-TR | Same pinout and electrical specs, but adds 30Ω auto-discharge on both outputs when disabled-pulls down VOUT1/VOUT2 to prevent floating states. | Required where rapid output discharge is needed (e.g., hot-swap interfaces, safety-critical reset sequencing). | Select MIC5356-SCYMME-TR only if auto-discharge is mandatory; otherwise MIC5355-SCYMME-TR offers lower cost and identical regulation performance. |
| TPL7407LPGEDR | Single 7-channel 150mA LDO array (not dual 500mA); different pinout, no independent enables, 2% accuracy, 250mV dropout at 150mA. | Suitable for low-current peripheral rails (e.g., sensors, LEDs), not for high-current processor cores or memory interfaces. | Use TPL7407LPGEDR only for distributed low-power rails; MIC5355-SCYMME-TR remains preferred for centralized dual 500mA power delivery. |
Compared with MIC5356-SCYMME-TR, the MIC5355-SCYMME-TR trades auto-discharge capability for simpler control logic and marginally lower ground current in shutdown. Against TPL7407LPGEDR, it delivers 3.3× higher per-rail current capacity and true independent enable functionality-making it the only viable option for dual-rail, high-current, sequenced power architectures.
Availability
MIC5355-SCYMME-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.
Supply support for MIC5355-SCYMME-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 high-performance analog and power management ICs before its acquisition by Microchip Technology in 2015. Known for precision LDOs and timing solutions, Micrel emphasized low-noise, low-quiescent designs for portable electronics.
The MIC5355-SCYMME-TR belongs to Micrel's µCap dual-LDO family, engineered specifically for battery-powered portable devices demanding dual-rail efficiency, minimal footprint, and guaranteed stability with small ceramic capacitors-targeting smartphones, GPS modules, and compact imaging systems.
FAQ
What is the maximum input voltage rating for the MIC5355-SCYMME-TR?
The MIC5355-SCYMME-TR has an absolute maximum input voltage (VIN) rating of +6V, but its specified operating range is +2.5V to +5.5V. Exceeding 5.5V may cause permanent damage or violate safe operating area limits, even if within the absolute maximum. For reliable operation in USB-powered or boosted battery applications, VIN should be maintained ≤5.5V with appropriate overvoltage clamping.
Does the MIC5355-SCYMME-TR include output auto-discharge functionality?
No, the MIC5355-SCYMME-TR does not include auto-discharge. That feature is exclusive to the MIC5356 variant (e.g., MIC5356-SCYMME-TR), which integrates a 30Ω internal NFET to pull down each output when disabled. The MIC5355-SCYMME-TR enters ultra-low-quiescent shutdown (<1μA) but leaves outputs floating-external discharge resistors are required if rapid voltage decay is needed.
Can the MIC5355-SCYMME-TR operate with no load on either output?
Yes, the MIC5355-SCYMME-TR remains stable and in regulation with zero load current on either or both outputs. This is explicitly guaranteed in the datasheet and enables use in always-on subsystems like real-time clocks or sensor wake-up circuits where one rail may be inactive for extended periods without compromising regulation integrity.
What is the recommended output capacitor type and value for the MIC5355-SCYMME-TR?
The MIC5355-SCYMME-TR requires a minimum 2.2µF ceramic output capacitor per rail, with X5R or X7R dielectric recommended for stable capacitance over temperature. Y5V or Z5U dielectrics are discouraged due to >50% capacitance loss across –40°C to +85°C. A single 2.2µF 0402 X5R capacitor per output meets all stability and transient requirements without oversizing.
Is the MIC5355-SCYMME-TR pin-compatible with other members of the MIC5355/6 family?
Yes, all MIC5355/6 variants-including MIC5355-SCYMME-TR, MIC5355-SGYMME-TR, and MIC5356-SCYMME-TR-share identical 8-pin ePad MSOP (MME) pinouts and footprints. Voltage configurations differ only in internal trimming; EN1/EN2, VOUT1/VOUT2, VIN, GND, and NC pin assignments are functionally and physically identical across the family.
MIC5355-SCYMME-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):
- 1V, 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
MIC5355-SCYMME-TR FAQ
1.How can I place an order for MIC5355-SCYMME-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5355-SCYMME-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 MIC5355-SCYMME-TR reliable?
The price and inventory of MIC5355-SCYMME-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5355-SCYMME-TR is usually 5 days.
3.What payment methods are accepted for MIC5355-SCYMME-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5355-SCYMME-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5355-SCYMME-TR?
MIC5355-SCYMME-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5355-SCYMME-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 MIC5355-SCYMME-TR?
For technical support, including MIC5355-SCYMME-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5355-SCYMME-TR requirements.
6.How does Aetrix verify that MIC5355-SCYMME-TR is sourced from the original manufacturer or authorized distributors?
All MIC5355-SCYMME-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 MIC5355-SCYMME-TR meets industry standards.
7.What is the process for return or replacement of MIC5355-SCYMME-TR?
All MIC5355-SCYMME-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5355-SCYMME-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 MIC5355-SCYMME-TR part is unused and in its original packaging.
Return procedure for MIC5355-SCYMME-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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