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Microchip Technology MIC5247-1.6YM5-TR
- Part No.:
- MIC5247-1.6YM5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC5247-1.6YM5-TR.pdf
- Description:
- IC REG LINEAR 1.6V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,894
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Product details
Overview
MIC5247-1.6YM5-TR from Micrel is a 1.6V fixed-output, 150mA ultra-low-noise CMOS linear voltage regulator in SOT-23-5 package, featuring 1% initial output accuracy, 85µA load-independent ground current, 30µVRMS output noise (10Hz–100kHz), and logic-compatible active-high enable pin. It is optimized for RF power rails in battery-powered handheld devices requiring quiet, stable bias.
For engineers reviewing the MIC5247-1.6YM5-TR datasheet, MIC5247-1.6YM5-TR pinout, MIC5247-1.6YM5-TR application, or MIC5247-1.6YM5-TR equivalent, key selection criteria include dropout voltage at 150mA (150mV), PSRR of 50dB at ≤1kHz, thermal shutdown at 150°C, compatibility with low-ESR ceramic capacitors, and noise bypass capability via dedicated BYP pin.
Technical Context
The MIC5247-1.6YM5-TR employs a P-channel MOSFET pass device with N-channel clamp for fast transient recovery and active shutdown discharge. Its reference bypass architecture enables 30µVRMS noise performance when a 0.01µF capacitor is connected to the BYP pin.
It integrates under-voltage lockout, thermal shutdown with 10°C hysteresis, and current limiting (160–300mA). The regulator operates from 2.7V to 6V input, delivers 1.6V ±1% output, and maintains stability with ≥1µF ceramic output capacitance - no input capacitor required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.6V ±1% - tight regulation ensures stable core/bias rail for sensitive analog/RF circuits. |
| Max Output Current | 150mA - sufficient for baseband processors, RF front-end ICs, and low-power microcontrollers. |
| Dropout Voltage | 150mV @ 150mA - enables operation from single-cell Li-ion (3.0V min) with >1.4V headroom. |
| Ground Current | 85µA (load-independent) - minimizes quiescent drain in always-on battery backup rails. |
| Output Noise | 30µVRMS (10Hz–100kHz, CBYP=0.01µF) - meets stringent RF LNA/VCO supply noise requirements. |
| PSRR | 50dB @ ≤1kHz - suppresses switching noise from upstream DC-DC converters in hybrid power systems. |
| Enable Threshold | VIH = 1.6V (min), VIL = 0.4V (max) - compatible with 1.8V/2.5V/3.3V GPIO without level-shifting. |
Pinout & Package
SOT-23-5 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, with exposed pad not connected (NC); thermal resistance θJA = 235°C/W (minimum footprint).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply input | Accepts 2.7V–6V unregulated input; no input capacitor required unless >10" from bulk source. |
| 2 (GND) | Ground reference | Common return for input, output, enable, and bypass; connects to PCB ground plane. |
| 3 (EN) | Enable/Shutdown control | CMOS-compatible active-high input; must be pulled high (>1.6V) to enable, low (<0.4V) to shut down. |
| 4 (BYP) | Noise reference bypass | Connects 0.01µF capacitor to GND to reduce internal reference noise and improve PSRR. |
| 5 (OUT) | Regulated output | Delivers 1.6V ±1% to load; requires ≥1µF low-ESR ceramic capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 30µVRMS with 0.01µF BYP cap - enables direct powering of VCOs and LNAs without additional filtering. |
| Active shutdown discharge | N-channel clamp discharges output capacitor on disable - prevents residual voltage hold-up on powered-down subsystems. |
| Load-independent quiescent current | 85µA across 0–150mA load - eliminates efficiency penalty at light loads common in sleep-mode operation. |
| Fast transient response | Totem-pole output stage recovers from 100mA→85µA load step with minimal overshoot - reduces need for large bulk capacitance. |
| Stability with ceramic capacitors | Works with ≥1µF X5R/X7R ceramics - eliminates tantalum cost/size/reliability trade-offs in space-constrained designs. |
Applications
| Cellular Front-End Power | Low-Power Microcontroller Core Rail |
|---|---|
|
Use Scenario: Supplying LNA and mixer stages in GSM/UMTS transceivers where supply noise directly impacts EVM and adjacent channel leakage. IC Role / Device Role / Timing Role: Ultra-low-noise post-regulator for RF signal chain biasing. Use Value: 30µVRMS noise and 50dB PSRR prevent switching artifacts from DC-DC converters from degrading RF linearity. |
Use Scenario: Providing clean 1.6V core voltage to ARM Cortex-M0+ or RISC-V MCU during active and sleep modes. IC Role / Device Role / Timing Role: Precision low-quiescent linear regulator for digital logic core supply. Use Value: 85µA ground current and active shutdown reduce average system current by >20% in duty-cycled sensor nodes. |
| Portable Medical Sensor Bias | SMPS Post-Regulator |
|
Use Scenario: Powering precision analog front-ends (e.g., EEG/ECG amplifiers) in wearable health monitors. IC Role / Device Role / Timing Role: Low-drift, low-noise analog supply regulator. Use Value: 1% initial accuracy and <3% load regulation ensure consistent ADC reference scaling across battery discharge. |
Use Scenario: Tightening output tolerance and reducing ripple/noise after a 3.3V buck converter in industrial IoT gateways. IC Role / Device Role / Timing Role: High-PSRR linear post-regulator for noise-sensitive peripherals. Use Value: 150mV dropout allows 3.3V→1.6V conversion with only 1.7V overhead, improving overall system efficiency vs. higher-dropout alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2016PDQNR | 1.6V output, 300mA, 12µVRMS noise, 250mV dropout @ 300mA, 6-pin WSON. | Higher output current and lower noise, but larger package and higher minimum input voltage (1.65V). | Preferred when >150mA load or sub-30µV noise is required; not pin-compatible. |
| AP2210K-16W5 | 1.6V output, 150mA, 45µVRMS noise, 200mV dropout @ 150mA, SOT-23-5. | Higher noise and dropout, no BYP pin; simpler BOM but less RF-optimized. | Cost-sensitive alternative where 45µVRMS noise is acceptable and BYP functionality is unused. |
Compared with TPS7A2016PDQNR and AP2210K-16W5, the MIC5247-1.6YM5-TR uniquely balances ultra-low noise (30µVRMS), SOT-23-5 footprint, and integrated BYP pin for noise tailoring - making it optimal for space-constrained RF bias rails where 150mA suffices.
Availability
MIC5247-1.6YM5-TR is available at Aetrix Electronics and suitable for cellular front-end power, portable medical sensor bias, SMPS post-regulation, low-power microcontroller core rails, and RF module supply requiring stable component supply across production lifecycles.
Supply support for MIC5247-1.6YM5-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 analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC5247 family was designed specifically for ultra-low-noise, low-voltage regulation in battery-powered wireless devices - emphasizing RF integrity, minimal quiescent current, and ceramic-capacitor compatibility.
FAQ
What is the maximum input voltage for MIC5247-1.6YM5-TR?
The absolute maximum input voltage for MIC5247-1.6YM5-TR is +7V, but the recommended operating range is +2.7V to +6V. Exceeding 6V risks exceeding thermal limits under full load, especially in the SOT-23-5 package with θJA = 235°C/W. For 150mA output at 1.6V, the practical max input is ~5.2V at 25°C ambient with minimum copper footprint.
Does MIC5247-1.6YM5-TR require an input capacitor?
No, MIC5247-1.6YM5-TR does not require an input capacitor for stability. A 1µF ceramic capacitor is recommended only if the bulk supply is located more than 10 inches from the device or when powered directly from a battery with high source impedance - to dampen high-frequency ringing and improve transient immunity.
Can the BYP pin of MIC5247-1.6YM5-TR be left unconnected?
Yes, the BYP pin of MIC5247-1.6YM5-TR may be left open with no functional impact. When unconnected, the regulator operates with typical 30µVRMS noise; connecting a 0.01µF capacitor to GND further reduces noise and improves PSRR. Larger values (e.g., 1µF) yield diminishing returns but do not harm stability.
What is the shutdown current of MIC5247-1.6YM5-TR?
The shutdown current of MIC5247-1.6YM5-TR is specified as 0.2–1µA at VEN ≤ 0.4V. This "nearly zero" off-mode current enables multi-year battery life in always-on sensor nodes. The active clamp circuit also discharges the output capacitor during shutdown, preventing unintended wake-up from residual voltage.
Is MIC5247-1.6YM5-TR compatible with ceramic output capacitors?
Yes, MIC5247-1.6YM5-TR is explicitly designed for stability with low-ESR ceramic capacitors ≥1µF (X5R/X7R). Unlike older LDOs requiring tantalum or aluminum electrolytics, this eliminates ESR-related phase-margin concerns and supports miniaturized layouts in handheld devices.
MIC5247-1.6YM5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.15V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- 50dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MIC5247-1.6YM5-TR FAQ
1.How can I place an order for MIC5247-1.6YM5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5247-1.6YM5-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 MIC5247-1.6YM5-TR reliable?
The price and inventory of MIC5247-1.6YM5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5247-1.6YM5-TR is usually 5 days.
3.What payment methods are accepted for MIC5247-1.6YM5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5247-1.6YM5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5247-1.6YM5-TR?
MIC5247-1.6YM5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5247-1.6YM5-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 MIC5247-1.6YM5-TR?
For technical support, including MIC5247-1.6YM5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5247-1.6YM5-TR requirements.
6.How does Aetrix verify that MIC5247-1.6YM5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5247-1.6YM5-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 MIC5247-1.6YM5-TR meets industry standards.
7.What is the process for return or replacement of MIC5247-1.6YM5-TR?
All MIC5247-1.6YM5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5247-1.6YM5-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 MIC5247-1.6YM5-TR part is unused and in its original packaging.
Return procedure for MIC5247-1.6YM5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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