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Microchip Technology MIC5371-SGYMT-TR
- Part No.:
- MIC5371-SGYMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UFDFN Exposed Pad, 6-TMLF®
- Datasheet:
-
MIC5371-SGYMT-TR.pdf
- Description:
- IC REG LINEAR 1.8V/3.3V 6TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,231
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Product details
Overview
MIC5371-SGYMT-TR from Micrel is a dual-output, high-performance LDO regulator delivering 150mA per channel with fixed 3.3V and 1.8V 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 power sequencing in camera DSP and mobile baseband subsystems.
For engineers reviewing the MIC5371-SGYMT-TR datasheet, MIC5371-SGYMT-TR pinout, MIC5371-SGYMT-TR application, or MIC5371-SGYMT-TR equivalent, key selection criteria include dual independent enable control, 30Ω internal discharge FET (MIC5371-specific), stability with 1µF ceramic capacitors, and thermal shutdown/current-limit protection across –40°C to +125°C junction range.
Technical Context
The MIC5371-SGYMT-TR integrates two independent CMOS-based LDO regulators sharing a common VIN and GND, each with active-high enable (EN1/EN2) and dedicated output (VOUT1/VOUT2). Its architecture includes a precision bandgap reference, low-noise error amplifiers, and separate current-limit and thermal-shutdown circuits per channel.
Unlike the MIC5370 variant, the MIC5371-SGYMT-TR adds an internal 30Ω NFET discharge path activated automatically when either EN pin is driven low - ensuring fast VOUT1/VOUT2 ramp-down without external components. This function operates independently per regulator and is confirmed only for MIC5371 family members.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 3.3V (VOUT1) and 1.8V (VOUT2) - fixed, non-adjustable; enables direct powering of I/O and core rails in portable SoC designs. |
| Max Output Current | 150mA per LDO - supports moderate-power peripherals like image sensors, RF transceivers, and memory interfaces. |
| Dropout Voltage | 155mV at 150mA - allows operation with minimal headroom (e.g., 3.3V out from 3.455V input), extending battery life in single-cell Li-ion systems. |
| Ground Current | 32µA per LDO (typ.) - ultra-low quiescent current preserves standby time in always-on subsystems. |
| Accuracy | ±2% initial tolerance - ensures reliable voltage margining for 1.8V logic and 3.3V interface compliance without external trimming. |
| PSRR | 60dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding VIN. |
| Auto-Discharge | 30Ω internal FET (MIC5371 only) - discharges output caps within microseconds upon disable, preventing back-powering or latch-up in multi-rail systems. |
Pinout & Package
Package: 6-pin 1.6mm × 1.6mm Thin MLF® (Pb-free, halogen-free, NiPdAu finish), exposed thermal pad (EPAD) internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Supply Input | Common input for both LDOs; requires 1µF ceramic bypass capacitor to GND for stability. |
| 2 - GND | Ground Reference | Power and signal return; EPAD must be soldered to PCB ground plane for thermal performance. |
| 3 - EN2 | Enable Input (LDO2) | Active-high logic control; drives LDO2 output (1.8V) on/off; must not float - tie to GND or controller GPIO. |
| 4 - EN1 | Enable Input (LDO1) | Active-high logic control; drives LDO1 output (3.3V) on/off; independent of EN2 for flexible power sequencing. |
| 5 - VOUT2 | LDO2 Output | Regulated 1.8V supply; auto-discharged via internal 30Ω FET when EN2 = low. |
| 6 - VOUT1 | LDO1 Output | Regulated 3.3V supply; auto-discharged via internal 30Ω FET when EN1 = low. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | EN1 and EN2 allow staggered startup/shutdown of 3.3V and 1.8V rails - critical for FPGA, ASIC, or PMIC-controlled sequencing. |
| Auto-discharge circuit | 30Ω internal NFET per output (MIC5371 only) eliminates need for external bleed resistors, reducing BOM count and board area. |
| Stability with 1µF ceramic caps | Eliminates requirement for large or specialized output capacitors - lowers cost and simplifies layout in space-constrained mobile designs. |
| Thermal & current protection | Independent foldback current limiting and thermal shutdown per LDO prevent damage during overload or poor heatsinking. |
| Low-noise operation | 200µVRMS output noise (10Hz–100kHz) supports noise-sensitive analog/RF blocks powered from VOUT2 (1.8V). |
Applications
| Camera DSP Power Supply | Mobile Baseband Core Rail |
|---|---|
Use Scenario: Dual-rail power delivery to image signal processor (ISP) and companion sensor in smartphone front/rear camera modules. IC Role / Device Role / Timing Role: MIC5371-SGYMT-TR provides isolated 3.3V I/O and 1.8V core supplies with independent enable timing to meet ISP power-up sequence requirements. Use Value: Auto-discharge prevents residual charge on 1.8V rail from interfering with reset timing during mode transitions or sleep/wake cycles. | Use Scenario: Powering application processor core (1.8V) and communication interface (3.3V) in LTE/GNSS handheld devices. IC Role / Device Role / Timing Role: MIC5371-SGYMT-TR acts as post-regulator for DC/DC outputs, delivering clean, sequenced low-noise rails with minimal footprint. Use Value: 155mV dropout enables efficient use of partially depleted battery voltage, extending operational runtime between charges. |
| Portable GPS Receiver | PMP Audio Codec Supply |
Use Scenario: Supplying GPS baseband IC requiring strict 1.8V core and 3.3V RF/analog bias rails under varying battery conditions. IC Role / Device Role / Timing Role: MIC5371-SGYMT-TR serves as primary linear regulator, rejecting noise from switching converters while maintaining tight voltage regulation. Use Value: ±2% accuracy ensures GPS receiver PLL and ADC reference stability across temperature and load, preserving positioning accuracy. | Use Scenario: Powering stereo audio codec in portable media player where low noise and fast transient response are essential. IC Role / Device Role / Timing Role: MIC5371-SGYMT-TR delivers quiet 1.8V digital core and 3.3V analog supply with independent enable for mute/unmute control. Use Value: 60dB PSRR at 1kHz suppresses switching ripple from system DC/DC, reducing audible noise in headphone output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC5370-SGYMT-TR | No auto-discharge circuit; identical pinout, specs, and package - but lacks internal 30Ω discharge FET. | Requires external discharge resistors if fast VOUT ramp-down is needed; unsuitable for strict sequencing where back-powering must be avoided. | Select MIC5370-SGYMT-TR only if auto-discharge is unnecessary and cost minimization is prioritized. |
| TPL7407LDR | Single 250mA LDO (not dual); 3.3V fixed; no 1.8V output; no auto-discharge; SOT-23-5 package. | Cannot replace MIC5371-SGYMT-TR directly - requires two devices plus external sequencing logic for dual-rail operation. | Consider only for redesigns where dual outputs are split across separate regulators and board area permits larger footprint. |
Compared with MIC5370-SGYMT-TR, the MIC5371-SGYMT-TR adds essential auto-discharge functionality without changing pinout or electrical specs - enabling simpler, more reliable power sequencing. Versus TPL7407LDR, it delivers true dual-rail integration in half the board area and eliminates external discharge components.
Availability
MIC5371-SGYMT-TR is available at Aetrix Electronics and suitable for camera modules, mobile baseband subsystems, and portable GPS receivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5371-SGYMT-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.
The MIC5370/1 family was designed specifically for compact, battery-powered portable electronics requiring dual, independently controlled, low-noise LDOs with minimal external components and robust protection features.
FAQ
What is the key functional difference between MIC5371-SGYMT-TR and MIC5370-SGYMT-TR?
The MIC5371-SGYMT-TR includes an internal 30Ω auto-discharge FET on both VOUT1 and VOUT2, activated automatically when EN1 or EN2 is driven low. The MIC5370-SGYMT-TR lacks this feature entirely. All other electrical specifications, pinout, package, and marking are identical. This makes MIC5371-SGYMT-TR the correct choice when rapid output capacitor discharge is required to prevent back-powering or ensure clean power-down sequencing.
Does MIC5371-SGYMT-TR require external components for stability?
No - MIC5371-SGYMT-TR is stable with only 1µF ceramic output capacitors on VOUT1 and VOUT2, and a 1µF ceramic input capacitor on VIN. X5R or X7R dielectrics are recommended. No external compensation, discharge resistors, or feedforward capacitors are needed, simplifying design and reducing bill-of-materials cost.
What is the maximum ambient temperature for MIC5371-SGYMT-TR operating at full 150mA per channel?
At VIN = 3.6V, VOUT1 = 3.3V, VOUT2 = 1.8V, and 150mA per output, MIC5371-SGYMT-TR dissipates ~0.39W. With θJA = 90°C/W and TJ(max) = 125°C, the maximum allowable ambient temperature is approximately 89.9°C. Adequate PCB copper pour on the EPAD is essential to maintain this rating.
Can MIC5371-SGYMT-TR be used with input voltages below 2.5V?
No - MIC5371-SGYMT-TR has a specified minimum input voltage of 2.5V per its Absolute Maximum and Operating Ratings. Operation below 2.5V may result in loss of regulation, increased dropout, or undefined behavior. For sub-2.5V inputs, alternative LDOs with lower VIN minima must be selected.
Is the EPAD of MIC5371-SGYMT-TR electrically connected, and how should it be handled in layout?
Yes - the EPAD is internally connected to GND and must be soldered to a solid PCB ground plane for optimal thermal performance and electrical stability. Thermal vias under the EPAD are strongly recommended to transfer heat to inner or bottom-layer copper, especially in high-current or high-ambient-temperature applications.
MIC5371-SGYMT-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):
- 1.8V, 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-SGYMT-TR FAQ
1.How can I place an order for MIC5371-SGYMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5371-SGYMT-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-SGYMT-TR reliable?
The price and inventory of MIC5371-SGYMT-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-SGYMT-TR is usually 5 days.
3.What payment methods are accepted for MIC5371-SGYMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5371-SGYMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5371-SGYMT-TR?
MIC5371-SGYMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5371-SGYMT-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-SGYMT-TR?
For technical support, including MIC5371-SGYMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5371-SGYMT-TR requirements.
6.How does Aetrix verify that MIC5371-SGYMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5371-SGYMT-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-SGYMT-TR meets industry standards.
7.What is the process for return or replacement of MIC5371-SGYMT-TR?
All MIC5371-SGYMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5371-SGYMT-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-SGYMT-TR part is unused and in its original packaging.
Return procedure for MIC5371-SGYMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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