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Microchip Technology MIC5356-S4YMME
- Part No.:
- MIC5356-S4YMME
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MIC5356-S4YMME.pdf
- Description:
- IC REG LINEAR 1.2V/3.3V 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,202
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Product details
Overview
MIC5356-S4YMME from Micrel is a dual-channel, micropower, low-dropout linear regulator delivering independent 500mA outputs at fixed 3.3V and 1.2V. It operates from 2.5V to 5.5V input, draws only 70µA quiescent current with both outputs enabled, features 350mV dropout at full load, and includes active output discharge (30Ω) on disable-making it ideal for battery-powered portable electronics requiring tight voltage regulation and fast transient response.
For engineers reviewing the MIC5356-S4YMME datasheet, MIC5356-S4YMME pinout, MIC5356-S4YMME application, or MIC5356-S4YMME equivalent, key selection criteria include dual-output independence, µCap stability with 2.2µF ceramic capacitors, thermal shutdown protection, and MSOP-8 ePad package compatibility for high-density PCB layouts.
Technical Context
The MIC5356-S4YMME integrates two fully independent LDO regulators with CMOS-based enable control, each supporting logic-high enable inputs (EN1/EN2) and internal current/thermal limiting. Its architecture enables simultaneous or staggered power-up sequencing without cross-coupling effects.
Unlike the MIC5355 variant, the MIC5356-S4YMME implements an auto-discharge circuit per output-activating a 30Ω internal NFET between VOUT and GND when the corresponding EN pin is driven low-ensuring rapid output voltage decay during shutdown in systems sensitive to residual rail hold-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltages | 3.3V (LDO1) and 1.2V (LDO2), fixed, ±2% initial accuracy over temperature |
| Max output current | 500mA per channel, with current limit of 525–1050mA (typ. 750mA) |
| Dropout voltage | 350mV typical at 500mA, enabling operation with minimal VIN–VOUT headroom |
| Quiescent current | 70µA total (both outputs enabled); <1µA in shutdown |
| Input voltage range | 2.5V to 5.5V-supports single-cell Li-ion, 3.3V, and 5V system rails |
| Stability capacitor | 2.2µF ceramic per output (X5R/X7R dielectric); no minimum ESR requirement |
| PSRR | 60dB at 1kHz, critical for noise-sensitive analog/digital mixed-signal loads |
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; requires 2.2µF ceramic decoupling to GND |
| GND | Ground reference | Power and signal return; connects to HSPAD for thermal conduction |
| NC | No connect | Pins 3 and 6 are unconnected internally-must be left floating or grounded per layout best practice |
| EN2 | LDO2 enable | Active-high CMOS input; drives LDO2 on/off independently; must not float |
| EN1 | LDO1 enable | Active-high CMOS input; controls 3.3V output independently; same drive requirements as EN2 |
| VOUT2 | LDO2 output | 1.2V regulated output; internally discharged via 30Ω NFET when EN2 = low |
| VOUT1 | LDO1 output | 3.3V regulated output; internally discharged via 30Ω NFET when EN1 = low |
| HSPAD | Heatsink pad | Exposed copper pad beneath package; must be soldered to solid GND plane with ≥4 thermal vias (0.3–0.35mm dia.) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | EN1 and EN2 allow precise sequencing-e.g., power 3.3V rail before 1.2V core-without external logic |
| Auto-discharge circuit | 30Ω internal pull-down per output ensures rapid VOUT decay (<1ms for 100µF load), preventing latch-up in downstream logic |
| µCap stability | Stable with 2.2µF ceramic output caps-reduces BOM count and board area vs. traditional tantalum solutions |
| Low-noise regulation | 146µVRMS output noise (10Hz–100kHz) supports noise-sensitive RF, ADC, and sensor circuits |
| Thermal & current protection | Integrated foldback current limiting and thermal shutdown prevent damage during overload or poor heatsinking |
Applications
| Smartphone Power Management | Portable GPS Receiver |
|---|---|
Use Scenario: Dual-rail power for application processor (3.3V I/O) and low-voltage core (1.2V CPU core) in compact handheld form factor. IC Role / Device Role / Timing Role: Primary dual-LDO regulator providing isolated, sequenced, and rapidly discharged power domains. Use Value: Enables clean power-up/down sequencing and eliminates need for external discharge resistors-saving PCB space and BOM cost. | Use Scenario: Powering GPS baseband IC (3.3V) and RF front-end LNA (1.2V) in battery-operated navigation device. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current dual regulator ensuring stable supply under dynamic RF load conditions. Use Value: 60dB PSRR at 1kHz suppresses switching noise from PMU or DC-DC converters, preserving GPS signal integrity. |
| Notebook Subsystem Supply | Digital Camera Image Sensor Bias |
Use Scenario: Providing auxiliary 3.3V (USB interface) and 1.2V (memory controller I/O) rails in ultraportable notebook sub-board. IC Role / Device Role / Timing Role: Compact dual-LDO replacing discrete regulators to meet strict height and thermal constraints. Use Value: 8-pin ePad MSOP footprint and 64.4°C/W θJA enable reliable 500mA operation without external heatsink. | Use Scenario: Biasing CMOS image sensor analog front-end (3.3V) and digital logic core (1.2V) in DSLR or action camera. IC Role / Device Role / Timing Role: Low-noise, fast-transient dual regulator minimizing image artifacts during exposure bursts. Use Value: 350mV dropout allows operation from partially discharged Li-ion (3.4V min), extending usable battery life per charge 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 |
|---|---|---|---|
| MIC5355-S4YMME | No auto-discharge; identical pinout, output voltages, and quiescent current | Suitable where output hold-up during shutdown is acceptable or externally managed | Select when cost sensitivity outweighs need for integrated discharge; same layout but omit discharge timing validation |
| TPL7407LPGEDR | Single 7-channel 150mA driver (not dual-LDO); different function, package (HTSSOP-16), and regulation architecture | Not functionally equivalent-used for LED/gate driving, not precision voltage regulation | Not recommended as direct alternative; consider only if redesigning for non-regulator functions |
Compared with MIC5355-S4YMME, the MIC5356-S4YMME adds essential auto-discharge capability for safety-critical or tightly sequenced systems, while TPL7407LPGEDR serves a fundamentally different purpose and cannot replace its dual-LDO functionality.
Availability
MIC5356-S4YMME is available at Aetrix Electronics and suitable for smartphone power management, portable GPS receivers, and notebook subsystem supply requiring stable component supply across industrial temperature range (–40°C to +125°C).
Supply support for MIC5356-S4YMME 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.
The MIC5356 belongs to Micrel's µCap LDO family-designed specifically for space-constrained, battery-powered devices needing dual independent low-noise, low-IQ regulation with minimal external components.
FAQ
What is the maximum output current per channel for the MIC5356-S4YMME?
The MIC5356-S4YMME delivers up to 500mA per channel continuously. Its current-limit threshold is specified from 525mA to 1050mA (typ. 750mA) under short-circuit conditions. Thermal derating applies above ambient temperatures where power dissipation exceeds safe junction limits-verified using θJA = 64.4°C/W and TJ(MAX) = 125°C. The MIC5356-S4YMME maintains regulation across this range with built-in foldback current limiting and thermal shutdown.
Does the MIC5356-S4YMME require external discharge resistors?
No. The MIC5356-S4YMME integrates an active discharge circuit per output: when EN1 or EN2 is driven low, a 30Ω internal NFET connects the respective VOUT pin to GND. This eliminates the need for external resistors to discharge output capacitors-reducing BOM count, board area, and leakage current. The MIC5356-S4YMME's auto-discharge feature is absent in the MIC5355 variant and is confirmed in the Electrical Characteristics table under "Auto-Discharge NFET Resistance".
What capacitor values and types are required for stable operation of the MIC5356-S4YMME?
The MIC5356-S4YMME requires a minimum 2.2µF X5R or X7R ceramic capacitor on each output (VOUT1 and VOUT2) and a 2.2µF ceramic capacitor on VIN. Y5V and Z5U dielectrics are not recommended due to excessive capacitance loss over temperature. The MIC5356-S4YMME is optimized for low-ESR ceramics and remains stable with no load-unlike many LDOs that require minimum load current. These values are validated in the Application Information section and Typical Characteristics plots.
Can the MIC5356-S4YMME operate from a single-cell Li-ion battery?
Yes. The MIC5356-S4YMME supports input voltages from 2.5V to 5.5V, covering the full discharge curve of a single-cell Li-ion battery (typically 4.2V down to ~2.7V). With 350mV dropout at 500mA, the 3.3V output remains regulated down to VIN ≈ 3.65V, and the 1.2V output remains regulated down to VIN ≈ 1.55V-ensuring functional operation well into battery depletion. This behavior is confirmed in the "Output Voltage vs. Input Voltage" and "Dropout Voltage vs. Output Current" graphs on pages 5–6 of the datasheet.
Is the MIC5356-S4YMME pin-compatible with other variants in the MIC5355/6 family?
Yes-the MIC5356-S4YMME shares identical pinout, package (8-pin ePad MSOP), and terminal functions with all MIC5355/6-xxYMME variants, including MIC5355-S4YMME and MIC5356-SGYMME. Differences are limited to output voltage combinations and presence of auto-discharge (MIC5356 only). No PCB redesign is needed when substituting within the same package code (YMME), though enable sequencing and discharge timing should be revalidated for system-level behavior.
MIC5356-S4YMME 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:
- Obsolete
- 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 FAQ
1.How can I place an order for MIC5356-S4YMME through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5356-S4YMME 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 reliable?
The price and inventory of MIC5356-S4YMME 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 is usually 5 days.
3.What payment methods are accepted for MIC5356-S4YMME?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5356-S4YMME transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5356-S4YMME?
MIC5356-S4YMME orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5356-S4YMME 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?
For technical support, including MIC5356-S4YMME datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5356-S4YMME requirements.
6.How does Aetrix verify that MIC5356-S4YMME is sourced from the original manufacturer or authorized distributors?
All MIC5356-S4YMME 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 meets industry standards.
7.What is the process for return or replacement of MIC5356-S4YMME?
All MIC5356-S4YMME units undergo pre-shipment inspection (PSI). If there is an issue with MIC5356-S4YMME, 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 part is unused and in its original packaging.
Return procedure for MIC5356-S4YMME:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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