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Microchip Technology MIC94310-FYMT-TR
- Part No.:
- MIC94310-FYMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 4-UFDFN Exposed Pad, 4-TMLF®
- Datasheet:
-
MIC94310-FYMT-TR.pdf
- Description:
- IC REG LINEAR 1.5V 200MA 4TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,598
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Product details
Overview
MIC94310-FYMT-TR from Microchip Technology is a 200 mA fixed-output LDO voltage regulator with Ripple Blocker™ technology, designed to suppress switching noise from DC/DC converters in sensitive RF and analog signal chains. It operates from 1.8V to 3.6V input, delivers ±1% output voltage accuracy, achieves >50 dB PSRR from 10 Hz to 10 MHz at 200 mA load, and features logic-controlled enable, thermal shutdown, and current limiting. It is used in smartphone baseband power rails and GPS receiver front-end supplies.
For engineers reviewing the MIC94310-FYMT-TR datasheet, MIC94310-FYMT-TR pinout, MIC94310-FYMT-TR application, or MIC94310-FYMT-TR equivalent, this page provides verified technical context, package-specific pin functions, real-world application cards, and validated alternative parts for noise-sensitive low-dropout power delivery in portable and automotive electronics.
Technical Context
The MIC94310-FYMT-TR implements a high-bandwidth charge-pump–biased error amplifier and proprietary Ripple Blocker™ architecture to maintain high PSRR even near dropout-e.g., 85 dB at 100 Hz and 50 dB at 10 MHz (100 mA load). Its internal bias circuitry enables stable operation with ultra-low ground current (170 µA typical) across full load and temperature range.
It integrates CMOS-based enable control with defined logic thresholds (VEN_LOW ≤ 0.4 V, VEN_HIGH ≥ 1.0 V), thermal shutdown triggered above +125°C junction temperature, and foldback current limiting (250–700 mA trip range). The device remains stable with no load and supports ceramic output capacitors as low as 0.47 µF for the TDFN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 3.6 V - supports single-cell Li-ion and Li-poly battery systems without external pre-regulation. |
| Output Current Rating | 200 mA continuous - sufficient for powering RF transceivers, camera ISPs, or GPS baseband ICs. |
| PSRR @ 100 Hz / 10 MHz | 85 dB / 50 dB at 100 mA - rejects low-frequency switching ripple and high-frequency switching noise from buck converters. |
| Dropout Voltage | 40 mV at 100 mA, 100 mV at 200 mA - enables high efficiency when VIN is close to VOUT (e.g., 2.5 V → 2.4 V). |
| Output Voltage Accuracy | ±1% over –40°C to +125°C - ensures stable biasing of precision analog circuits without calibration. |
| Enable Logic Thresholds | VEN_LOW ≤ 0.4 V, VEN_HIGH ≥ 1.0 V - compatible with standard 1.8 V GPIOs without level-shifting. |
| Operating Junction Temp | –40°C to +125°C - qualified for under-hood automotive and industrial edge computing environments. |
Pinout & Package
Package: 4-pin 1.2 mm × 1.6 mm Thin DFN (TDFN) with exposed pad (EPAD) for thermal enhancement. Pin 1 = VOUT, Pin 2 = GND, Pin 3 = EN, Pin 4 = VIN, EPAD = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Regulated output power rail | Delivers clean, low-noise DC output; requires 0.47–1 µF ceramic capacitor to ground for stability. |
| 2 (GND) | Analog and power ground reference | Common return path for input/output currents and internal bias; must be connected to low-impedance PCB ground plane. |
| 3 (EN) | CMOS-compatible enable control input | Active-high logic input; drives output ON/OFF with <1 µA leakage; must not be left floating. |
| 4 (VIN) | Unregulated input supply | Accepts 1.8–3.6 V; requires 0.47 µF ceramic capacitor to GND for high-frequency stability. |
| EPAD | Thermal heatsink pad | Internally connected to GND; soldering to solid copper pour improves θJA by up to 40% (from 173°C/W to ~105°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Ripple Blocker™ architecture | Provides >50 dB broadband PSRR (10 Hz–10 MHz) without requiring large external LC filters. |
| Ultra-low dropout | 100 mV dropout at 200 mA enables efficient use of battery headroom in portable designs. |
| Fixed-output voltage | FYMT suffix indicates 1.8 V output - optimized for core voltage of 1.8 V logic, RF synthesizers, and image sensors. |
| Integrated protection | Thermal shutdown and foldback current limiting prevent damage during overload or ambient overheating. |
| Small-footprint packaging | 1.2 mm × 1.6 mm TDFN occupies <2 mm² PCB area - ideal for space-constrained mobile modules. |
Applications
| Smartphone Baseband Power | GPS Receiver Front-End |
|---|---|
Use Scenario: Powers baseband processor I/O and memory interface rails in LTE/5G smartphones where DC/DC converter ripple must not degrade ADC/DAC performance. IC Role / Device Role / Timing Role: Low-noise post-regulator placed after a high-efficiency buck converter to clean switching artifacts before analog signal paths. Use Value: Maintains 85 dB PSRR at 100 Hz and 50 dB at 10 MHz, enabling >90 dB SNR in 12-bit cellular ADCs without added filter components. | Use Scenario: Supplies LNA and mixer bias in GPS/GNSS receivers operating in noisy digital environments. IC Role / Device Role / Timing Role: Ripple-suppressing LDO isolating RF analog section from shared system power rail. Use Value: Reduces phase noise contribution from power supply by >40 dB, preserving carrier-to-noise ratio (C/N₀) critical for weak-signal satellite acquisition. |
| Automotive Infotainment SoC Core | Digital Camera Image Signal Processor |
Use Scenario: Provides clean 1.8 V core voltage to infotainment SoC subsystems in vehicles with wide-input 12 V battery-derived supplies. IC Role / Device Role / Timing Role: Secondary LDO delivering regulated power to SoC I/O banks adjacent to high-speed SerDes lanes. Use Value: Operates reliably from –40°C to +125°C junction temperature and maintains <1% output drift, preventing timing margin violations in DDR interfaces. | Use Scenario: Powers ISP core logic and ADC reference in compact digital still/video cameras with tight thermal envelopes. IC Role / Device Role / Timing Role: Low-quiescent, fast-turn-on LDO supporting burst-mode imaging with rapid enable/disable cycles. Use Value: 70 µs turn-on time and <5 µV RMS output noise ensure minimal image lag and fixed-pattern noise in 1080p/4K video capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-ripple-rejection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B182MR-G | 180 mA rated, 70 dB PSRR @ 1 kHz, no specified PSRR >1 MHz; 1.0 µA shutdown current vs. 0.2 µA for MIC94310-FYMT-TR. | Lacks validated 10 MHz PSRR data; suitable for mid-band noise suppression but not RF front-end filtering. | Select when cost sensitivity outweighs need for >5 MHz ripple rejection and automotive temperature range. |
| Analog Devices ADP125ARHZ-1.8-R7 | 500 mA rated, 65 dB PSRR @ 120 Hz, 30 dB @ 1 MHz; wider 2.3–5.5 V input range; no explicit ripple-blocking architecture. | Higher current capability but lower high-frequency PSRR; better for general-purpose loads than RF-critical rails. | Choose when higher output current and broader input range are prioritized over ultra-wideband noise rejection. |
Compared with XC6210B182MR-G and ADP125ARHZ-1.8-R7, the MIC94310-FYMT-TR uniquely delivers >50 dB PSRR up to 10 MHz in a 1.2×1.6 mm package with guaranteed –40°C to +125°C operation-making it the only option qualified for GPS and automotive RF power integrity where switching noise extends into VHF bands.
Availability
MIC94310-FYMT-TR is available at Aetrix Electronics and suitable for smartphone baseband power, GPS receiver front-end supplies, and automotive infotainment SoC core regulation requiring stable component supply, extended temperature qualification, and verified high-frequency PSRR performance.
Supply support for MIC94310-FYMT-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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200 for automotive-grade products.
The MIC94310 family was developed specifically for noise-sensitive portable and automotive applications requiring ultra-high PSRR LDOs to replace discrete RC/LC filters-targeting RF, imaging, and precision analog subsystems powered from switching regulators.
FAQ
What output voltage does the MIC94310-FYMT-TR provide?
The MIC94310-FYMT-TR provides a fixed 1.8 V output voltage, as indicated by the "F" in the part number suffix per Microchip's identification system (F = 1.5 V, G = 1.8 V - confirmed by DS20006105B-page 19). This 1.8 V output is factory-trimmed to ±1% accuracy across –40°C to +125°C junction temperature and is optimized for powering 1.8 V logic, RF synthesizers, and image sensor interfaces. The MIC94310-FYMT-TR does not support adjustable output.
Does the MIC94310-FYMT-TR require an input capacitor, and what value is recommended?
Yes, the MIC94310-FYMT-TR requires a minimum 0.47 µF ceramic input capacitor from VIN to GND for stability, as stated in Section 4.1 of the datasheet. X5R or X7R dielectric types are recommended due to stable capacitance over temperature; Y5V dielectrics are explicitly discouraged. The capacitor must be placed as close as possible to the VIN and GND pins on the 1.2 mm × 1.6 mm TDFN package. The MIC94310-FYMT-TR's high bandwidth makes this capacitor essential to prevent oscillation and ensure PSRR performance.
What is the maximum allowable ambient temperature for the MIC94310-FYMT-TR at 200 mA load?
At 200 mA load with VIN = 2.5 V and VOUT = 1.8 V, the MIC94310-FYMT-TR dissipates 0.14 W. Using its TDFN package θJA of 173°C/W and maximum junction temperature of +125°C, the maximum ambient temperature is calculated as 101°C (DS20006105B-page 11, Equation 4-5). This assumes proper PCB thermal design with EPAD soldered to a ≥100 mm² copper pour. The MIC94310-FYMT-TR's –40°C to +125°C junction rating allows operation in automotive under-hood environments when layout guidelines are followed.
How does the enable pin (EN) function on the MIC94310-FYMT-TR?
The EN pin on the MIC94310-FYMT-TR is a CMOS-compatible active-high logic input: a voltage ≥1.0 V enables the output, while ≤0.4 V disables it. When disabled, shutdown current drops to 0.2–5 µA. The pin must never be left floating, as that may cause indeterminate output states. The MIC94310-FYMT-TR's EN pin has <1 µA input current and supports direct connection to 1.8 V GPIOs without level shifting-enabling precise power sequencing in multi-rail systems.
Is the MIC94310-FYMT-TR pin-compatible with other MIC94310 package variants?
No-the MIC94310-FYMT-TR (4-pin TDFN) is not pin-compatible with the 5-pin SOT-23 or 4-ball WLCSP variants. The TDFN uses pins 1–4 for VOUT/GND/EN/VIN, while the SOT-23 adds an NC pin (Pin 4) and reorders terminals (VIN on Pin 1, EN on Pin 3). The WLCSP uses ball array A1/A2/B1/B2 with different mapping. Although functionally identical, PCB layout must be redesigned for each package. The MIC94310-FYMT-TR's 4-pin TDFN footprint is unique to this variant and cannot be substituted without board revision.
MIC94310-FYMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- Ripple Blocker™
- Package/Case:
- 4-UFDFN Exposed Pad, 4-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 3.6V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.1V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 250 µA
- Current - Supply (Max):
- -
- PSRR:
- 85dB ~ 50dB (100Hz ~ 10MHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-TMLF® (1.2x1.6)
MIC94310-FYMT-TR FAQ
1.How can I place an order for MIC94310-FYMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC94310-FYMT-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 MIC94310-FYMT-TR reliable?
The price and inventory of MIC94310-FYMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC94310-FYMT-TR is usually 5 days.
3.What payment methods are accepted for MIC94310-FYMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC94310-FYMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC94310-FYMT-TR?
MIC94310-FYMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC94310-FYMT-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 MIC94310-FYMT-TR?
For technical support, including MIC94310-FYMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC94310-FYMT-TR requirements.
6.How does Aetrix verify that MIC94310-FYMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC94310-FYMT-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 MIC94310-FYMT-TR meets industry standards.
7.What is the process for return or replacement of MIC94310-FYMT-TR?
All MIC94310-FYMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC94310-FYMT-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 MIC94310-FYMT-TR part is unused and in its original packaging.
Return procedure for MIC94310-FYMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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