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Microchip Technology MIC5371-SMYMT-TR
- Part No.:
- MIC5371-SMYMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UFDFN Exposed Pad, 6-TMLF®
- Datasheet:
-
MIC5371-SMYMT-TR.pdf
- Description:
- IC REG LINEAR 2.8V/3.3V 6TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:3,445
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Product details
Overview
MIC5371-SMYMT-TR from Micrel is a dual-output, high-performance LDO voltage regulator delivering 150mA per channel with fixed 3.3V and 2.8V outputs in a 6-pin 1.6mm × 1.6mm Thin MLF® package. It features ±2% initial output accuracy, 155mV dropout at 150mA, 32µA typical ground current per LDO, and integrated auto-discharge circuitry for rapid output capacitor discharge during shutdown - ideal for space-constrained portable electronics requiring fast power sequencing and low quiescent power.
For engineers reviewing the MIC5371-SMYMT-TR datasheet, MIC5371-SMYMT-TR pinout, MIC5371-SMYMT-TR application, or MIC5371-SMYMT-TR equivalent, key selection criteria include independent active-high enable control, stability with 1µF ceramic capacitors, thermal shutdown protection, and the MIC5371-specific 30Ω internal discharge FET on both outputs.
Technical Context
The MIC5371-SMYMT-TR integrates two independent CMOS-based LDO regulators sharing a common input (VIN) and ground (GND), each with dedicated enable (EN1/EN2) and output (VOUT1/VOUT2) pins. Its architecture supports simultaneous or staggered activation, with zero-off-mode current (<1µA total) when both enables are low.
Unlike the MIC5370 variant, the MIC5371-SMYMT-TR includes an internal 30Ω auto-discharge NFET per output activated upon disable, ensuring rapid VOUT1/VOUT2 discharge without external circuitry. It maintains high PSRR (60dB at 1kHz) and low output noise (200µVRMS, 10Hz–100kHz) while operating across –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltages | Fixed 3.3V (VOUT1) and 2.8V (VOUT2); eliminates external feedback resistors and simplifies BOM. |
| Max output current | 150mA per LDO; supports dual-rail core/I/O powering in compact handhelds without derating. |
| Dropout voltage | 155mV at 150mA load; enables operation down to VIN = 2.95V for 2.8V rail and VIN = 3.45V for 3.3V rail. |
| Ground current | 32µA per LDO at light load; ensures <65µA total quiescent draw in active dual-rail mode. |
| Output accuracy | ±2% initial tolerance; guarantees tight voltage margins for sensitive DSP, camera sensor, and RF IC bias rails. |
| Auto-discharge | 30Ω internal NFET per output (MIC5371 only); discharges 10µF load in <300µs, preventing back-powering or latch-up. |
| PSRR | 60dB at 1kHz; suppresses switching noise from adjacent DC/DC converters feeding the same battery rail. |
| Stability | Guaranteed with ≥1µF X5R/X7R ceramic output capacitors; no ESR requirements simplify layout. |
Pinout & Package
Package: 6-pin 1.6mm × 1.6mm Thin MLF® (MT) with exposed thermal pad (internally connected to GND). RoHS-compliant, halogen-free mold compound, NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Common input supply | Accepts 2.5V–5.5V; must be decoupled with ≥1µF ceramic capacitor to GND. |
| 2 - GND | Power ground reference | Shared return for both LDOs and thermal pad; requires low-impedance PCB connection. |
| 3 - EN2 | Active-high enable for LDO2 (2.8V) | Logic high ≥1.2V enables VOUT2; floating state prohibited - must be pulled high or low via resistor. |
| 4 - EN1 | Active-high enable for LDO1 (3.3V) | Independent control allows staggered power-up/down sequences for system-level sequencing. |
| 5 - VOUT2 | 2.8V regulated output | Delivers up to 150mA; auto-discharged via internal 30Ω FET when EN2 = low. |
| 6 - VOUT1 | 3.3V regulated output | Delivers up to 150mA; auto-discharged via internal 30Ω FET when EN1 = low. |
Key Features
| Feature | Design Value |
|---|---|
| Independent enable control | EN1 and EN2 allow per-rail power gating - critical for low-power sleep modes in mobile SoCs. |
| Auto-discharge circuitry | 30Ω internal discharge FET on both outputs (MIC5371 only) eliminates need for external bleed resistors. |
| Thermal & current protection | Integrated thermal shutdown and 200–550mA current limiting prevent damage during overload or short-circuit. |
| Low-noise regulation | 200µVRMS output noise (10Hz–100kHz) supports noise-sensitive analog and RF subsystems. |
| Ultra-small footprint | 1.6mm × 1.6mm Thin MLF® saves >60% board area vs. standard SOT-23 dual-LDO solutions. |
Applications
| Camera Module Power | Mobile Application Processor Core |
|---|---|
Use Scenario: Dual-rail power for CMOS image sensor (2.8V analog I/O) and ISP core logic (3.3V). IC Role / Device Role / Timing Role: Provides independently enabled, low-noise, fast-transient LDO rails with auto-discharge to prevent sensor latch-up during mode transitions. Use Value: Eliminates external discharge circuitry and reduces sequencing complexity while maintaining <2% voltage accuracy under dynamic load. | Use Scenario: Supplying 3.3V I/O and 2.8V core voltage to application processors in smartphones and tablets. IC Role / Device Role / Timing Role: Delivers tightly regulated, low-dropout power with independent enable for DVFS-controlled core domains. Use Value: Enables rapid power-state transitions with sub-125µs turn-on time and zero-off-mode current for extended battery life. |
| GPS Receiver Front-End | Portable Media Player Audio Codec |
Use Scenario: Powering GPS RF front-end (2.8V LNA/VCO) and baseband processor (3.3V digital logic). IC Role / Device Role / Timing Role: Supplies clean, PSRR-optimized rails to minimize phase noise and spurious emissions in GNSS receivers. Use Value: 60dB PSRR at 1kHz rejects switching noise from shared PMIC, improving C/N₀ ratio by >3dB. | Use Scenario: Providing 3.3V digital interface and 2.8V analog AVDD for stereo audio codecs in PMPs. IC Role / Device Role / Timing Role: Regulates dual rails with low output noise to preserve SNR in 24-bit DAC paths. Use Value: 200µVRMS noise ensures >95dB SNR performance without additional LC filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5370-SMYMT-TR | No auto-discharge circuit; higher shutdown current (~1µA vs. <0.1µA); identical pinout and electrical specs otherwise. | Lacks output discharge - unsuitable where rapid rail collapse is required to avoid back-powering or reset glitches. | Select only if auto-discharge is unnecessary and cost sensitivity outweighs functional gap. |
| Torex XC6219B332MR-G | Single-output 3.3V LDO (no 2.8V rail); 100mA max; no auto-discharge; SOT-25 package (2.9mm × 2.8mm). | Requires two separate devices to replicate dual-rail function; larger footprint and higher BOM count. | Consider only for redesigns where space constraints permit larger packaging and dual-device implementation. |
Compared with MIC5370-SMYMT-TR, the MIC5371-SMYMT-TR adds essential auto-discharge functionality without increasing size or cost - making it the preferred choice for systems requiring controlled power-down sequencing. Versus Torex XC6219B332MR-G, MIC5371-SMYMT-TR delivers true dual-rail integration in half the footprint and eliminates inter-device timing mismatches.
Availability
MIC5371-SMYMT-TR is available at Aetrix Electronics and suitable for camera modules, mobile application processors, GPS receivers, and portable media players requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5371-SMYMT-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 mixed-signal ICs before its acquisition by Microchip Technology in 2015.
The MIC5370/1 family was designed specifically for ultra-compact, battery-powered portable electronics requiring dual, independently controlled, low-quiescent LDOs with minimal external components.
FAQ
What is the primary functional difference between MIC5371-SMYMT-TR and MIC5370-SMYMT-TR?
The MIC5371-SMYMT-TR includes an internal 30Ω auto-discharge NFET on both VOUT1 and VOUT2, activated when the respective enable pin is low. This rapidly discharges external output capacitors to prevent back-powering or unintended device wake-up. The MIC5370-SMYMT-TR lacks this feature and draws ~1µA in shutdown versus <0.1µA for MIC5371-SMYMT-TR.
Can MIC5371-SMYMT-TR operate with input voltage below 2.8V?
No. MIC5371-SMYMT-TR requires a minimum input voltage of 2.5V per the datasheet, but practical operation for the 2.8V output demands VIN ≥ 2.95V (2.8V + 155mV dropout). Below that, LDO2 drops out of regulation. The 3.3V output requires VIN ≥ 3.45V. Input below 2.5V risks undefined behavior or damage.
Is MIC5371-SMYMT-TR stable with 0.47µF ceramic output capacitors?
No. The MIC5371-SMYMT-TR is specified and guaranteed stable only with ≥1µF X5R or X7R ceramic output capacitors. Using 0.47µF violates the minimum capacitance requirement and may cause oscillation or poor transient response - confirmed in the "Output Capacitor" section of the datasheet.
Does MIC5371-SMYMT-TR require an input capacitor?
Yes. A minimum 1µF ceramic input capacitor from VIN to GND is mandatory for stability and EMI suppression. Low-ESR X5R/X7R dielectrics are recommended. Omitting it risks instability, increased noise coupling, and potential thermal shutdown under load.
What is the maximum ambient temperature for MIC5371-SMYMT-TR at full 150mA load on both outputs?
At VIN = 3.6V, VOUT1 = 3.3V, VOUT2 = 2.8V, and 150mA per rail, power dissipation is ~0.39W. With θJA = 90°C/W and TJ(max) = 125°C, the maximum ambient temperature is ~89.9°C - assuming optimal PCB copper area and thermal pad soldering. Derate linearly for reduced copper or higher θJA.
MIC5371-SMYMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-UFDFN Exposed Pad, 6-TMLF®
- 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):
- 2.8V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.31V @ 150mA, 0.31V @ 150mA
- Current - Output:
- 150mA, 150mA
- Current - Quiescent (Iq):
- 45 µA
- Current - Supply (Max):
- 85 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:
- 6-TMLF® (1.6x1.6)
MIC5371-SMYMT-TR FAQ
1.How can I place an order for MIC5371-SMYMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5371-SMYMT-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 MIC5371-SMYMT-TR reliable?
The price and inventory of MIC5371-SMYMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5371-SMYMT-TR is usually 5 days.
3.What payment methods are accepted for MIC5371-SMYMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5371-SMYMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5371-SMYMT-TR?
MIC5371-SMYMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5371-SMYMT-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 MIC5371-SMYMT-TR?
For technical support, including MIC5371-SMYMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5371-SMYMT-TR requirements.
6.How does Aetrix verify that MIC5371-SMYMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5371-SMYMT-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 MIC5371-SMYMT-TR meets industry standards.
7.What is the process for return or replacement of MIC5371-SMYMT-TR?
All MIC5371-SMYMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5371-SMYMT-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 MIC5371-SMYMT-TR part is unused and in its original packaging.
Return procedure for MIC5371-SMYMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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