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Microchip Technology MIC5385-SGFYMT-TR
- Part No.:
- MIC5385-SGFYMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-UFDFN Exposed Pad, 8-TMLF®
- Datasheet:
-
MIC5385-SGFYMT-TR.pdf
- Description:
- IC REG LIN 1.5V/1.8V/3.3V 8TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:3,103
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Product details
Overview
MIC5385-SGFYMT-TR from Micrel is an ultra-small triple-output LDO regulator delivering 150mA per channel with fixed output voltages of 3.3V, 1.8V, and 1.5V in a single 2mm × 2mm 8-pin Thin MLF® package. It features ±2% initial accuracy, 180mV dropout at 150mA, 70dB PSRR at 1kHz, and 32µA quiescent current per LDO - optimized for space-constrained portable electronics requiring independent low-noise power rails.
For engineers reviewing the MIC5385-SGFYMT-TR datasheet, MIC5385-SGFYMT-TR pinout, MIC5385-SGFYMT-TR application, or MIC5385-SGFYMT-TR equivalent, this device supports simultaneous multi-rail regulation in battery-powered systems where board area, thermal efficiency, and shutdown current (<1µA) are critical selection criteria.
Technical Context
The MIC5385-SGFYMT-TR integrates three independent CMOS-based LDO regulators sharing a common input (Pin 2) and ground (Pin 8), each with dedicated active-high enable inputs (Pins 1, 3, 4) and dedicated outputs (Pins 5, 6, 7). Each regulator employs internal bandgap reference and error amplifier architecture with thermal shutdown and foldback current limiting.
It operates across 2.5V–5.5V input range, maintains stability with 1µF ceramic capacitors on all inputs/outputs, and achieves <125µs turn-on time per channel. The exposed thermal pad (EP) must be connected to PCB ground plane to sustain 125°C junction temperature under full 450mA combined load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltages | 3.3V / 1.8V / 1.5V - fixed, non-adjustable rails for baseband, memory, and core logic domains |
| Max output current per LDO | 150mA - supports simultaneous operation of multiple low-power ICs without external current boosting |
| Dropout voltage | 180mV @ 150mA - enables regulation from 3.48V input to 3.3V rail, critical for Li-ion battery discharge tail-end |
| PSRR | 70dB @ 1kHz - suppresses switching noise from adjacent DC-DC converters feeding shared input rail |
| Quiescent current | 32µA per enabled LDO - extends battery life in always-on subsystems such as RTC or sensor wake-up circuitry |
| Shutdown current | 0.05–1µA total - near-zero leakage when all EN pins driven low, enabling true system-level power gating |
| Accuracy | ±2% initial, ±3% over –40°C to +125°C - ensures reliable logic-level compliance across automotive and industrial ambient ranges |
Pinout & Package
Package: 2mm × 2mm 8-pin Thin MLF® (MT) with exposed thermal pad (EP); RoHS-compliant, halogen-free mold compound, NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (EN3) | Enable input for LDO3 (1.5V) | Active-high CMOS input; must be pulled to VIN or GND - floating state causes undefined output behavior |
| Pin 2 (IN) | Shared input supply | Single 2.5–5.5V source powers all three regulators; requires 1µF X5R/X7R ceramic decoupling to GND |
| Pin 3 (EN2) | Enable input for LDO2 (1.8V) | Independent control allows selective powering of memory rails while keeping processor core (LDO1) active |
| Pin 4 (EN1) | Enable input for LDO1 (3.3V) | Enables baseband or interface rail; timing-critical - turn-on delay ≤125µs with 1µF output capacitor |
| Pin 5 (OUT2) | LDO2 output (1.8V) | Delivers regulated 1.8V to DDR I/O or digital camera sensor interface; stable with ≥1µF ceramic output cap |
| Pin 6 (OUT1) | LDO1 output (3.3V) | Primary rail for RF transceivers or USB PHY; 70dB PSRR minimizes coupling from high-frequency TX bursts |
| Pin 7 (OUT3) | LDO3 output (1.5V) | Supplies low-voltage core logic (e.g., ARM Cortex-M3 VDDCORE); dropout margin allows use with 1.68V minimum input |
| Pin 8 (GND) | Common ground return | Low-impedance path for all three LDOs; must be tied to solid ground plane beneath EP for thermal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent enable control | Per-rail power sequencing without external logic - enables staggered startup to limit inrush current |
| Stable with 1µF ceramic capacitors | Eliminates need for large tantalum or electrolytic caps - reduces BOM cost and PCB footprint by >50% |
| Zero-off-mode shutdown | Total device current drops below 1µA when all EN pins = 0V - essential for long-term storage or deep-sleep modes |
| Thermal shutdown + current limit | Protects against short-circuit or overload on any single output without affecting other rails' operation |
| Low-noise output | 127–152µVRMS noise (10Hz–100kHz) - suitable for analog sensors and ADC reference supplies |
Applications
| Mobile Phone Baseband Power | Digital Camera Sensor Biasing |
|---|---|
|
Use Scenario: Powering separate voltage domains for application processor (3.3V), memory interface (1.8V), and image signal processor core (1.5V) in a compact smartphone PCB. IC Role / Device Role / Timing Role: Triple LDO providing isolated, low-noise, sequenced power rails with independent enable control for dynamic power management. Use Value: Reduces component count vs. three discrete LDOs; 4mm² footprint saves >33% board area versus 3mm × 2mm alternatives. |
Use Scenario: Supplying bias voltages to CMOS image sensor (1.8V analog, 1.5V digital core) and ISP (3.3V I/O) in a DSLR or action camera module. IC Role / Device Role / Timing Role: Low-PSRR, low-noise regulator ensuring clean analog supply and stable digital core voltage during high-frame-rate capture. Use Value: 70dB PSRR prevents switching noise from DC-DC converters from degrading image SNR; 180mV dropout sustains operation down to 2.8V battery voltage. |
| GPS Receiver Front-End | Handheld PDA System Rail |
|
Use Scenario: Delivering clean 3.3V RF front-end supply and 1.8V digital baseband voltage in a GPS module operating under weak-signal conditions. IC Role / Device Role / Timing Role: Ultra-low-noise LDO suppressing broadband interference that would otherwise degrade GPS C/N₀ ratio and position fix accuracy. Use Value: 152µVRMS output noise and 70dB PSRR directly improve receiver sensitivity by >2dB in real-world urban canyon environments. |
Use Scenario: Consolidating power for PDA main CPU (3.3V), touchscreen controller (1.8V), and SRAM backup (1.5V) in a legacy handheld design. IC Role / Device Role / Timing Role: Multi-rail regulator enabling software-controlled rail shutdown to extend battery runtime during idle periods. Use Value: Independent EN pins allow OS-level power policy enforcement; <1µA shutdown current extends shelf life beyond 12 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6216D331MR-G | Single-output 3.3V LDO only; no 1.8V/1.5V rails; 200mA output; 250mV dropout | Requires two additional regulators to match MIC5385-SGFYMT-TR's triple-rail capability | Select only if system needs only one rail and prioritizes lower cost over integration |
| Ricoh RP512K331B-TR-F | Dual-output (3.3V/1.8V); no 1.5V rail; 200mA per channel; 120mV dropout; 1.5mm × 2mm WLCSP | Lacks third rail - unsuitable for designs requiring independent 1.5V core supply | Choose when board space is more constrained than rail count, and 1.5V rail can be derived elsewhere |
Compared with XC6216D331MR-G and RP512K331B-TR-F, the MIC5385-SGFYMT-TR uniquely delivers three precisely matched, independently controllable rails in the smallest possible footprint - eliminating inter-rail crosstalk and simplifying layout for multi-voltage SoC systems.
Availability
MIC5385-SGFYMT-TR is available at Aetrix Electronics and suitable for mobile phones, digital cameras, GPS modules, and handheld PDAs requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MIC5385-SGFYMT-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 power management, analog, and RF solutions before its acquisition by Microchip Technology in 2015. Its LDO portfolio emphasized ultra-low quiescent current and miniature packaging.
The MIC5385 belongs to Micrel's ultra-compact triple-LDO family designed specifically for portable electronics where PCB area, thermal performance, and multi-rail sequencing are primary constraints - not general-purpose regulation.
FAQ
What are the exact output voltages provided by the MIC5385-SGFYMT-TR?
The MIC5385-SGFYMT-TR provides three fixed, non-adjustable output voltages: 3.3V on Pin 6 (OUT1), 1.8V on Pin 5 (OUT2), and 1.5V on Pin 7 (OUT3). These values are laser-trimmed at wafer test and guaranteed within ±2% initial accuracy across temperature and load - no external resistors or feedback networks are required or supported for adjustment.
Can the MIC5385-SGFYMT-TR operate with input voltage below 2.5V?
No. The MIC5385-SGFYMT-TR has a specified minimum input voltage of 2.5V per Absolute Maximum Ratings and Operating Ratings tables. Operation below 2.5V violates the device's operational specification and may result in unregulated output, increased dropout, or failure to maintain regulation - especially on the 1.5V rail where dropout headroom becomes insufficient.
Is the exposed thermal pad (EP) of the MIC5385-SGFYMT-TR electrically connected?
Yes - the exposed thermal pad (EP) is internally connected to GND (Pin 8). Per the datasheet's PCB Layout Recommendations, it must be soldered to a solid copper ground plane to ensure proper thermal dissipation and electrical grounding. Failure to connect EP to GND degrades thermal resistance (θJA rises from 90°C/W), risks thermal shutdown under load, and may compromise PSRR performance.
Does the MIC5385-SGFYMT-TR require external capacitors, and what types are recommended?
Yes - the MIC5385-SGFYMT-TR requires a 1µF X5R or X7R ceramic capacitor from IN to GND (Pin 2 to Pin 8), and a 1µF X5R/X7R ceramic capacitor on each output (Pins 5, 6, 7 to GND). Y5V and Z5U dielectrics are explicitly discouraged due to excessive capacitance loss over temperature, which risks instability and oscillation.
How does the enable logic work across the three LDOs in the MIC5385-SGFYMT-TR?
Each LDO has its own active-high enable input: EN1 (Pin 4) controls LDO1 (3.3V), EN2 (Pin 3) controls LDO2 (1.8V), and EN3 (Pin 1) controls LDO3 (1.5V). All three must be ≥1.2V to activate their respective outputs; ≤0.2V disables them. Floating enables are prohibited - they cause indeterminate output states and potential shoot-through current. The MIC5385-SGFYMT-TR draws <1µA total when all three EN pins are held at 0V.
MIC5385-SGFYMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad, 8-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 3
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V, 1.8V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.38V @ 150mA, 0.38V @ 150mA, 0.31V @ 150mA
- Current - Output:
- 150mA, 150mA, 150mA
- Current - Quiescent (Iq):
- 120 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 50dB (1kHz ~ 10kHz), 70dB ~ 50dB (1kHz ~ 10kHz), -
- 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-TMLF® (2x2)
MIC5385-SGFYMT-TR FAQ
1.How can I place an order for MIC5385-SGFYMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5385-SGFYMT-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 MIC5385-SGFYMT-TR reliable?
The price and inventory of MIC5385-SGFYMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5385-SGFYMT-TR is usually 5 days.
3.What payment methods are accepted for MIC5385-SGFYMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5385-SGFYMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5385-SGFYMT-TR?
MIC5385-SGFYMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5385-SGFYMT-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 MIC5385-SGFYMT-TR?
For technical support, including MIC5385-SGFYMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5385-SGFYMT-TR requirements.
6.How does Aetrix verify that MIC5385-SGFYMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5385-SGFYMT-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 MIC5385-SGFYMT-TR meets industry standards.
7.What is the process for return or replacement of MIC5385-SGFYMT-TR?
All MIC5385-SGFYMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5385-SGFYMT-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 MIC5385-SGFYMT-TR part is unused and in its original packaging.
Return procedure for MIC5385-SGFYMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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