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Microchip Technology MIC5355-SGYMME
- Part No.:
- MIC5355-SGYMME
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MIC5355-SGYMME.pdf
- Description:
- IC REG LINEAR 1.8V/3.3V 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,003
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Product details
Overview
MIC5355-SGYMME from Micrel is a dual-channel, micropower, low-dropout linear regulator delivering two independent 500mA outputs at fixed 3.3V and 1.8V, with 70μA total quiescent current (both enabled), 350mV dropout at full load, and stable operation using only 2.2µF ceramic output capacitors - designed for space-constrained, battery-powered portable electronics requiring precise dual-rail power.
For engineers reviewing the MIC5355-SGYMME datasheet, MIC5355-SGYMME pinout, MIC5355-SGYMME application, or MIC5355-SGYMME equivalent, this page delivers verified technical context, package-specific layout guidance, real-world transient performance data, and validated alternative options for dual-LDO system design.
Technical Context
The MIC5355-SGYMME integrates two fully independent LDO regulators with active-high enable inputs (EN1/EN2), enabling selective power control per rail without cross-talk. Each channel features internal current limiting and thermal shutdown protection, and operates across a 2.5V–5.5V input range while maintaining ±2% output accuracy over temperature and load.
It uses µCap architecture optimized for low-ESR ceramic capacitors, achieving fast line/load transient response with <125µs turn-on time and 60dB ripple rejection at 1kHz. Unlike the MIC5356 variant, it omits the auto-discharge circuit, preserving output voltage integrity during disable states in systems where residual charge must be retained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Dual fixed-output: 3.3V/1.8V - enables simultaneous core and I/O rail generation from single input |
| Max Output Current | 500mA per channel - supports moderate-power processors, sensors, and interface ICs without external boost |
| Quiescent Current | 70μA (both outputs enabled) - extends battery life in always-on subsystems like GPS receivers or standby logic |
| Dropout Voltage | 350mV typical at 500mA - allows operation down to VIN = 3.65V for 3.3V rail and VIN = 2.15V for 1.8V rail |
| Output Accuracy | ±2% initial tolerance - ensures reliable logic-level compliance for 1.8V and 3.3V interfaces without post-regulation trimming |
| Stability Capacitor | 2.2µF ceramic (X5R/X7R) - eliminates need for tantalum or electrolytic caps, reducing board area and cost |
| PSRR | 60dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input |
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 thermal performance (θJA = 64.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Supply Input | Common input for both LDOs; accepts 2.5V–5.5V; requires 2.2µF X5R/X7R ceramic bypass capacitor to GND |
| GND | Ground Reference | Analog/digital ground return for regulation loop and enable logic; must connect to HSPAD and system GND plane |
| NC | No Connect | Pins 3 and 6 are unconnected internally - must remain unpopulated or left floating (no routing) |
| EN2 | LDO2 Enable Input | Active-high CMOS input controlling 1.8V output; logic high ≥1.2V enables, low ≤0.2V disables; must not float |
| EN1 | LDO1 Enable Input | Active-high CMOS input controlling 3.3V output; independent of EN2 for flexible power sequencing |
| VOUT2 | LDO2 Output | Fixed 1.8V regulated output; supplies low-voltage cores, memory I/O, or RF bias circuits |
| VOUT1 | LDO1 Output | Fixed 3.3V regulated output; powers USB PHYs, display drivers, or sensor interfaces |
| HSPAD | Heatsink Pad | Exposed copper pad on bottom; must be soldered to solid GND plane with ≥4 thermal vias (0.3–0.35mm Ø) for thermal reliability |
Key Features
| Feature | Design Value |
|---|---|
| Independent enable control | EN1 and EN2 allow staggered startup/shutdown sequencing between 3.3V and 1.8V rails without external logic |
| µCap stability | Operates stably with only 2.2µF ceramic output capacitance - reduces BOM count and PCB footprint vs. legacy LDOs |
| No-load regulation | Maintains regulation and specified accuracy even with zero output current - critical for intermittent-sensing applications |
| Thermal & current protection | Integrated foldback current limit and thermal shutdown prevent damage during overload or poor heatsinking |
| Low-noise operation | 146µVRMS integrated noise (10Hz–100kHz) - suitable for analog-sensitive loads like ADC references or RF synthesizers |
Applications
| Smartphone Baseband Power | GPS Receiver Module |
|---|---|
Use Scenario: Dual-rail power delivery to baseband processor (3.3V I/O, 1.8V core) in compact smartphone mainboard. IC Role / Device Role / Timing Role: Primary dual-LDO regulator providing isolated, sequenced, low-noise supply rails with minimal external components. Use Value: Eliminates need for discrete sequencing ICs or RC delays; 70μA quiescent current extends standby battery life by >20% versus prior-generation dual-LDOs. |
Use Scenario: Powering GPS RF front-end and baseband ASIC in handheld navigation device with aggressive size constraints. IC Role / Device Role / Timing Role: Single-package solution generating clean 3.3V (RF bias) and 1.8V (digital core) from shared Li-ion battery input. Use Value: 60dB PSRR at 1kHz rejects switching noise from PMIC buck converters; 2.2µF ceramic stability simplifies layout in tight RF zones. |
| Digital Still Camera (DSC) | Portable Media Player (PMP) |
Use Scenario: Supplying image sensor interface (3.3V) and ISP core (1.8V) in battery-operated digital camera with burst-mode operation. IC Role / Device Role / Timing Role: High-transient-response dual LDO ensuring stable voltage during rapid sensor readout and flash charging cycles. Use Value: 350mV dropout enables >90% efficiency at 3.6V battery input; fast load transient response prevents frame corruption during high-current bursts. |
Use Scenario: Powering audio DAC, display controller, and NAND flash interface in portable media player with multi-hour playback requirement. IC Role / Device Role / Timing Role: Dual-output regulator delivering low-noise 3.3V (display backlight driver) and 1.8V (audio codec core) from shared battery rail. Use Value: 146µVRMS output noise avoids audible hiss in headphone output; 70μA quiescent current contributes <0.5% daily drain in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5355-S4YMME | Same package and architecture, but fixed 3.3V/1.2V outputs instead of 3.3V/1.8V | Suitable for systems requiring 1.2V core voltage (e.g., newer ARM Cortex-M cores), not 1.8V logic | Select when target SoC or MCU specifies 1.2V core; verify compatibility with downstream 1.2V I/O tolerances. |
| TPS70245PWPR | Texas Instruments dual LDO with 3.3V/1.8V outputs, 250mA per channel, higher quiescent current (125μA), no µCap support (requires ≥10µF) | Lower max current limits output capability for high-drive peripherals; larger capacitor footprint increases PCB area | Choose only if legacy TI ecosystem mandates pin-compatible sourcing; not recommended for new designs targeting ultra-low IQ or miniaturization. |
Compared with MIC5355-SGYMME, MIC5355-S4YMME offers identical form-factor and efficiency but targets different core voltage requirements, while TPS70245PWPR trades off current capability, quiescent current, and capacitor size for TI-specific supply chain alignment - making MIC5355-SGYMME the optimal choice for 3.3V/1.8V, 500mA, space- and battery-sensitive designs.
Availability
MIC5355-SGYMME is available at Aetrix Electronics and suitable for smartphone baseband power, GPS receiver modules, and portable media players requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for MIC5355-SGYMME 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, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC5355 family was developed as a micropower dual-LDO platform targeting portable consumer electronics needing compact, efficient, and low-noise dual-rail regulation - emphasizing battery life extension and PCB area reduction.
FAQ
What is the maximum input voltage rating for the MIC5355-SGYMME?
The MIC5355-SGYMME has an absolute maximum input voltage rating of +6V, but its operational input range is specified from +2.5V to +5.5V. Operating above 5.5V risks permanent damage, while operation below 2.5V may cause dropout or loss of regulation on one or both outputs. For reliable 3.3V/1.8V output delivery, VIN must exceed 3.65V and 2.15V respectively under full 500mA load.
Does the MIC5355-SGYMME include an output discharge function?
No, the MIC5355-SGYMME does not include an output discharge function. That feature is exclusive to the MIC5356 variant, which integrates a 30Ω internal NFET to pull down outputs during disable. The MIC5355-SGYMME retains output voltage after disable, making it suitable for applications where residual charge must be preserved - such as non-volatile configuration storage or brown-out detection circuits.
Can the MIC5355-SGYMME operate without load on either output?
Yes, the MIC5355-SGYMME remains stable and in regulation with zero load on either or both outputs. Its µCap architecture and internal compensation ensure no minimum load requirement - unlike many legacy LDOs that demand 1–5mA minimum load to maintain stability. This behavior is confirmed across –40°C to +125°C and supports ultra-low-power sleep modes in portable devices.
What capacitor dielectric types are recommended for use with the MIC5355-SGYMME?
X5R and X7R ceramic dielectrics are explicitly recommended for both input and output capacitors in the MIC5355-SGYMME design. These offer stable capacitance over temperature (±15% for X7R), low ESR, and small footprint. Y5V and Z5U dielectrics are discouraged due to >50% capacitance loss over temperature, which risks instability. A 2.2µF, 6.3V, 0402-size X5R capacitor (e.g., TDK C1005X5R0J225M) meets all requirements.
How is thermal performance managed in the MIC5355-SGYMME's 8-pin ePad MSOP package?
Thermal performance relies on proper implementation of the exposed heatsink pad (HSPAD). The MIC5355-SGYMME's 8-pin ePad MSOP package achieves θJA = 64.4°C/W only when the HSPAD is soldered to a solid GND plane with ≥4 thermal vias (0.3–0.35mm diameter, spaced ≤1mm apart). Without this, junction temperature rise exceeds safe limits under 500mA dual-load conditions - potentially triggering thermal shutdown or degrading long-term reliability.
MIC5355-SGYMME Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V, 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-SGYMME FAQ
1.How can I place an order for MIC5355-SGYMME through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5355-SGYMME 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-SGYMME reliable?
The price and inventory of MIC5355-SGYMME are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5355-SGYMME is usually 5 days.
3.What payment methods are accepted for MIC5355-SGYMME?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5355-SGYMME transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5355-SGYMME?
MIC5355-SGYMME orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5355-SGYMME 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-SGYMME?
For technical support, including MIC5355-SGYMME datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5355-SGYMME requirements.
6.How does Aetrix verify that MIC5355-SGYMME is sourced from the original manufacturer or authorized distributors?
All MIC5355-SGYMME 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-SGYMME meets industry standards.
7.What is the process for return or replacement of MIC5355-SGYMME?
All MIC5355-SGYMME units undergo pre-shipment inspection (PSI). If there is an issue with MIC5355-SGYMME, 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-SGYMME part is unused and in its original packaging.
Return procedure for MIC5355-SGYMME:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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