My Inquiry
My Account
Microchip Technology MIC5355-SCYMME
- Part No.:
- MIC5355-SCYMME
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MIC5355-SCYMME.pdf
- Description:
- IC REG LINEAR 1V/3.3V 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,486
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC5355-SCYMME 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, achieves 350mV dropout at full load, and stabilizes with just 2.2µF ceramic output capacitors-optimized for space-constrained battery-powered portable electronics.
For engineers reviewing the MIC5355-SCYMME datasheet, MIC5355-SCYMME pinout, MIC5355-SCYMME application, or MIC5355-SCYMME equivalent, key selection considerations include dual-output voltage pairing, ultra-low shutdown current (<1μA), independent enable control, thermal performance in the 8-pin ePad MSOP package, and µCap stability without external compensation.
Technical Context
The MIC5355-SCYMME integrates two fully independent LDO regulators sharing only input and ground connections, each with active-high logic-controlled enable (EN1/EN2) and internal current/thermal limiting. Its architecture supports simultaneous or staggered power-up sequencing via separate enables and maintains regulation down to zero load.
It employs CMOS-based pass devices and proprietary error amplifiers optimized for fast line/load transient response-achieving <100µs turn-on time and >60dB ripple rejection at 1kHz-while requiring no external compensation due to µCap compatibility with low-ESR ceramic capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, 3.3V rail, or USB-powered systems without pre-regulation. |
| Output Voltages | 3.3V (LDO1) / 1.0V (LDO2) - fixed, factory-trimmed pair for core I/O domain separation in portable SoC applications. |
| Max Output Current | 500mA per channel - sufficient to power baseband processors, memory interfaces, or sensor subsystems. |
| Quiescent Current | 70μA (both LDOs enabled) - enables multi-week standby in always-on IoT endpoints. |
| Dropout Voltage | 350mV at 500mA - allows operation with minimal headroom (e.g., 3.3V out from 3.6V Li-ion). |
| Output Capacitor | 2.2µF ceramic minimum - eliminates need for tantalum or large electrolytics; reduces BOM count and board area. |
| Shutdown Current | <1μA typical - ensures negligible battery drain during deep sleep modes. |
| Output Accuracy | ±2% over temperature - meets tight tolerance requirements for digital core and analog peripheral rails. |
Pinout & Package
Package: 8-pin ePad MSOP (MME) with exposed thermal pad (HSPAD) - thermally enhanced for 64.4°C/W junction-to-ambient resistance; requires PCB thermal vias connected to ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Supply Input | Common input for both LDOs; must be decoupled with ≥2.2µF ceramic capacitor to GND. |
| GND | Ground Reference | System ground return; connects to HSPAD for optimal thermal and electrical performance. |
| NC | No Connect | Pins 3 and 6 are unconnected internally - must remain unpopulated or floating (no routing). |
| EN2 | LDO2 Enable | Active-high logic input controlling 1.0V output; 0.2V max logic low threshold ensures robust noise immunity. |
| EN1 | LDO1 Enable | Active-high logic input controlling 3.3V output; independent of EN2 for flexible power sequencing. |
| VOUT2 | LDO2 Output | Regulated 1.0V supply; stable with 2.2µF ceramic capacitor; no load required for regulation. |
| VOUT1 | LDO1 Output | Regulated 3.3V supply; supports high-current digital I/O domains while maintaining low noise. |
| HSPAD | Heatsink Pad | Exposed copper pad on underside - must be soldered to solid GND plane with ≥4 thermal vias (0.3–0.35mm dia) for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| µCap Stability | Operates stably with 2.2µF ceramic output capacitors - eliminates ESR requirements and simplifies layout. |
| Independent Enables | Separate EN1/EN2 pins allow asymmetric power-up/down sequencing - critical for SoC boot order compliance. |
| Zero-Load Regulation | Maintains regulation with no output load - avoids instability issues common in light-load LDOs. |
| Thermal Protection | Integrated thermal shutdown prevents damage during sustained overload or poor heatsinking. |
| Low-Noise Operation | 146µVRMS output noise (10Hz–100kHz) - suitable for noise-sensitive analog circuits and RF front-ends. |
| ESD Robustness | Human Body Model rated - handling precautions recommended but no external protection needed in standard environments. |
Applications
| Smartphones | GPS Navigation Devices |
|---|---|
Use Scenario: Powering application processor core (1.0V) and I/O interface (3.3V) from shared Li-ion battery. IC Role / Device Role / Timing Role: Dual-rail LDO providing isolated, low-noise, sequenced power domains for SoC subsystems. Use Value: Eliminates need for discrete regulators or complex PMIC sequencing, reducing component count and PCB area by 30%. | Use Scenario: Supplying GPS baseband IC (1.0V core) and RF transceiver I/O (3.3V) in handheld navigation units. IC Role / Device Role / Timing Role: Low-quiescent LDO enabling extended battery life during satellite acquisition and tracking phases. Use Value: 70μA operating current extends runtime by >12 hours versus legacy 200μA dual-LDO solutions. |
| Notebook Subsystems | Digital Cameras (DSC) |
Use Scenario: Delivering 1.0V core and 3.3V display interface power in compact notebook add-in modules. IC Role / Device Role / Timing Role: Thermally efficient dual-LDO supporting burst-mode CPU loads without thermal throttling. Use Value: 64.4°C/W θJA and ePad MSOP package enable 500mA/channel operation in 8mm² footprint. | Use Scenario: Powering image sensor logic (1.0V) and lens actuator driver (3.3V) in DSLR and mirrorless cameras. IC Role / Device Role / Timing Role: Fast-transient LDO ensuring clean power during rapid autofocus and exposure cycles. Use Value: >60dB PSRR at 1kHz suppresses switching noise from adjacent DC-DC converters, preventing image artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5355-S4YMME | Same package and architecture, but outputs 3.3V/1.2V instead of 3.3V/1.0V. | Suitable where 1.2V core rail is required (e.g., newer ARM Cortex-A cores), not 1.0V. | Select when system SoC specifies 1.2V core voltage; pinout and enable behavior identical. |
| MIC5356-SCYMME | Identical voltage outputs (3.3V/1.0V) and package, but adds auto-discharge circuit (30Ω FET) on both outputs. | Required where rapid output discharge during shutdown is mandatory (e.g., FPGA configuration retention). | Choose MIC5356-SCYMME if active discharge is needed; otherwise MIC5355-SCYMME offers lower cost and same regulation performance. |
Compared with MIC5355-S4YMME, MIC5355-SCYMME provides tighter alignment with 1.0V core logic standards; compared with MIC5356-SCYMME, it omits auto-discharge to reduce complexity and cost where discharge is handled externally or unnecessary.
Availability
MIC5355-SCYMME is available at Aetrix Electronics and suitable for smartphones, GPS navigation devices, and digital cameras requiring stable component supply across industrial temperature ranges (–40°C to +125°C) and long-term production continuity.
Supply support for MIC5355-SCYMME 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 power management, timing, and networking ICs before its acquisition by Microchip Technology in 2015.
The MIC5355 family was designed specifically for ultra-low-power, dual-rail portable electronics-emphasizing micropower operation, µCap stability, and compact packaging for space-constrained mobile and wearable applications.
FAQ
What is the output voltage configuration of the MIC5355-SCYMME?
The MIC5355-SCYMME delivers fixed, factory-trimmed output voltages of 3.3V on VOUT1 and 1.0V on VOUT2. These values are specified in the Ordering Information table and confirmed in the Electrical Characteristics section under "Voltage(2)" as "3.3V/1.0V". No external feedback resistors are used-the outputs are non-adjustable and optimized for low-noise, low-dropout operation in portable systems.
Does the MIC5355-SCYMME include an auto-discharge feature?
No, the MIC5355-SCYMME does not include an auto-discharge feature. That function is exclusive to the MIC5356 variant (e.g., MIC5356-SCYMME), which integrates a 30Ω internal discharge FET activated upon enable pin deactivation. The MIC5355-SCYMME relies on external discharge paths or natural load decay, making it suitable for applications where controlled discharge is not required.
What is the minimum output capacitance required for stable operation of the MIC5355-SCYMME?
The MIC5355-SCYMME requires a minimum of 2.2µF ceramic output capacitance per channel for guaranteed stability across temperature and load conditions. This is explicitly stated in the General Description and Application Information sections. X5R or X7R dielectric types are recommended; Y5V is discouraged due to excessive capacitance loss over temperature.
Can the MIC5355-SCYMME operate with no load connected to either output?
Yes, the MIC5355-SCYMME remains stable and in regulation with zero load on either or both outputs. This "no-load stability" is a documented design feature highlighted in the Application Information section and distinguishes it from many legacy LDOs that require minimum load resistors to prevent oscillation or dropout.
What thermal management is required for the MIC5355-SCYMME in continuous 500mA operation?
For continuous 500mA per channel at maximum ambient temperature, the MIC5355-SCYMME requires the 8-pin ePad MSOP's exposed thermal pad (HSPAD) to be soldered to a solid ground plane with at least four thermal vias (0.3–0.35mm diameter) connecting to inner/inner-layer ground planes. With this layout, its θJA is 64.4°C/W, enabling safe operation up to ~70°C ambient at full load-as calculated in the Thermal Considerations section using PD = (VIN − VOUT1)·IOUT1 + (VIN − VOUT2)·IOUT2.
MIC5355-SCYMME 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):
- 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 FAQ
1.How can I place an order for MIC5355-SCYMME through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5355-SCYMME 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 reliable?
The price and inventory of MIC5355-SCYMME 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 is usually 5 days.
3.What payment methods are accepted for MIC5355-SCYMME?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5355-SCYMME transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5355-SCYMME?
MIC5355-SCYMME orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5355-SCYMME 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?
For technical support, including MIC5355-SCYMME datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5355-SCYMME requirements.
6.How does Aetrix verify that MIC5355-SCYMME is sourced from the original manufacturer or authorized distributors?
All MIC5355-SCYMME 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 meets industry standards.
7.What is the process for return or replacement of MIC5355-SCYMME?
All MIC5355-SCYMME units undergo pre-shipment inspection (PSI). If there is an issue with MIC5355-SCYMME, 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 part is unused and in its original packaging.
Return procedure for MIC5355-SCYMME:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC5355-SCYMME Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
