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Microchip Technology MIC5247-1.5YM5-TR
- Part No.:
- MIC5247-1.5YM5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC5247-1.5YM5-TR.pdf
- Description:
- IC REG LINEAR 1.5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,979
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Product details
Overview
MIC5247-1.5YM5-TR from Micrel is a 1.5V 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, 150mV dropout at 150mA, and dedicated noise-bypass pin for RF-sensitive power rails in handheld wireless devices.
For engineers reviewing the MIC5247-1.5YM5-TR datasheet, MIC5247-1.5YM5-TR pinout, MIC5247-1.5YM5-TR application, or MIC5247-1.5YM5-TR equivalent, this page delivers verified electrical parameters, validated SOT-23-5 pin mapping, real-world use cases in battery-powered RF systems, and two confirmed alternative regulators with documented functional trade-offs.
Technical Context
The MIC5247-1.5YM5-TR uses a CMOS-based architecture with P-channel pass transistor and N-channel active clamp for fast transient recovery. Its reference bypass (BYP) pin connects to a 0.01µF capacitor to reduce output noise by >20dB in 10Hz–100kHz band.
It integrates thermal shutdown (150°C trip, 10°C hysteresis), current limiting (160–300mA), and logic-compatible enable input (VIH ≥ 1.6V, VIL ≤ 0.4V) that reduces quiescent current to 0.2µA in shutdown mode. Stability is ensured with ≥1µF low-ESR ceramic output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% at 25°C; supports precision biasing of low-voltage RF ICs without external feedback. |
| Max Output Current | 150mA continuous; sufficient for powering baseband processors or RF front-end ICs in compact portable designs. |
| Dropout Voltage | 150mV at 150mA load; enables operation from single-cell Li-ion (2.7V min input) while maintaining regulation. |
| Ground Current | 85µA typical, load-independent; ensures stable battery life estimation and minimal standby drain. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BYP cap; meets stringent spectral purity requirements for GSM/EDGE transceivers. |
| PSRR | 50dB at f ≤ 1kHz; suppresses switching noise from upstream DC-DC converters in hybrid power architectures. |
| Enable Threshold | VIH = 1.6V min, VIL = 0.4V max; compatible with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
Package: SOT-23-5 (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply input | Accepts 2.7V–6V input; requires no input capacitor unless supply trace exceeds 10 inches. |
| 2 (GND) | Ground reference | Common return for IN, OUT, EN, and BYP; must be low-impedance connection to system ground plane. |
| 3 (EN) | Enable/Shutdown control | CMOS-compatible active-high input; floating prohibited; ties to IN for always-on operation. |
| 4 (BYP) | Noise reference bypass | Connects 0.01µF capacitor to GND to shunt internal reference noise; optional but critical for <50µVRMS noise. |
| 5 (OUT) | Regulated output | Delivers 1.5V ±1% to load; requires ≥1µF low-ESR ceramic capacitor for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise output | 30µVRMS with 0.01µF BYP cap enables clean power for LNA, mixer, and VCO circuits in cellular front-ends. |
| Active output clamp | N-channel MOSFET clamp prevents overshoot during load removal, reducing transient recovery time by >50% vs. standard LDOs. |
| Zero off-mode current | 0.2µA shutdown current extends battery runtime in sleep modes of pagers and Bluetooth accessories. |
| Low-ESR capacitor support | Stable with ≥1µF ceramic output caps; eliminates need for bulky tantalum or electrolytic capacitors in space-constrained PCBs. |
| Thermal protection | 150°C shutdown with 10°C hysteresis prevents damage during sustained overload or poor heatsinking in sealed enclosures. |
Applications
| Cellular Phone Baseband Power | RF Transceiver Bias Supply |
|---|---|
Use Scenario: Powers ARM9-based baseband processor core and memory I/O in dual-mode GSM/EDGE handsets. IC Role / Device Role / Timing Role: Primary 1.5V LDO delivering regulated supply to processor VDD_IO rail with tight load regulation (≤3% deviation). Use Value: 85µA ground current ensures predictable battery discharge curve across 0.1–150mA load range, simplifying fuel-gauge calibration. |
Use Scenario: Supplies clean 1.5V bias to RF power amplifier driver stage in 850/1900MHz dual-band transceivers. IC Role / Device Role / Timing Role: Ultra-low-noise post-regulator after buck converter; BYP pin used with 0.01µF cap to meet −155dBc/Hz phase noise spec. Use Value: 30µVRMS noise floor prevents reciprocal mixing and maintains EVM <2.5% at 24dBm output. |
| Laptop USB Peripheral Regulator | PCMCIA Card VCC Switch |
Use Scenario: Provides 1.5V supply to USB 2.0 PHY controller on ultraportable notebook daughterboard. IC Role / Device Role / Timing Role: Enable-controlled LDO sequenced with USB enumeration; fast turn-on (<50µs) ensures compliance with USB suspend/resume timing. Use Value: Active clamp enables 100mA→100µA load step recovery in <2µs, preventing PHY lockup during hot-plug events. |
Use Scenario: Regulates and switches 1.5V VCC for Type II PCMCIA cards in industrial data acquisition modules. IC Role / Device Role / Timing Role: Logic-enabled power switch with thermal foldback; EN pin driven by card-detect signal to isolate unused slots. Use Value: 150mV dropout allows direct sourcing from 1.8V system rail, eliminating intermediate conversion stage and saving 12mm² board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1502E/TT | 1.5V, 250mA, 1.6µA quiescent current, no BYP pin, 170mV dropout at 250mA | Lacks noise-bypass capability; PSRR 45dB @ 1kHz; suitable where noise <100µVRMS is acceptable | Choose when ultra-low noise is not required and lower IQ dominates design priority. |
| Torex XC6206P152MR-G | 1.5V, 150mA, 1.0µA IQ, no BYP pin, 200mV dropout at 150mA, no enable input | Fixed-on operation only; no shutdown control; higher dropout limits input headroom in single-cell systems | Choose for cost-sensitive, always-on applications where enable control and sub-50µV noise are unnecessary. |
Compared with MIC5247-1.5YM5-TR, MCP1700T-1502E/TT offers higher output current and lower IQ but lacks the BYP pin essential for RF noise suppression, while XC6206P152MR-G eliminates enable functionality and increases dropout-making both unsuitable for battery-powered RF systems requiring dynamic power gating and <35µVRMS noise.
Availability
MIC5247-1.5YM5-TR is available at Aetrix Electronics and suitable for cellular phone baseband power, RF transceiver bias supply, and PCMCIA card regulation requiring stable component supply across automotive-grade temperature range (–40°C to +125°C).
Supply support for MIC5247-1.5YM5-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 handheld and battery-powered RF systems, emphasizing precision, minimal ground current, and fast transient response in miniature packages.
FAQ
What is the minimum input voltage required for MIC5247-1.5YM5-TR to maintain regulation?
The MIC5247-1.5YM5-TR requires a minimum input voltage of 2.7V per its operating rating. With a 150mV dropout at 150mA, it sustains 1.5V output down to VIN = 1.65V-but regulation is only guaranteed above 2.7V. Below that, performance degrades and is not characterized.
Can MIC5247-1.5YM5-TR operate without the BYP capacitor?
Yes, MIC5247-1.5YM5-TR functions without the BYP capacitor, delivering 30µVRMS noise with it and ~100µVRMS without it. The BYP pin may be left open if system-level noise requirements allow higher output ripple, such as in digital I/O rail applications.
Is MIC5247-1.5YM5-TR pin-compatible with other MIC5247-x.xYM5 variants?
Yes, all MIC5247-x.xYM5 SOT-23-5 variants-including MIC5247-1.5YM5-TR-share identical pinout, package dimensions, and thermal characteristics. Only the output voltage differs; no PCB changes are needed when substituting between 1.5V, 1.8V, or 2.0V versions.
What is the maximum allowable power dissipation for MIC5247-1.5YM5-TR in SOT-23-5 package?
At TA = 25°C with minimum footprint layout, MIC5247-1.5YM5-TR has θJA = 235°C/W. Using TJ(max) = 125°C, maximum power dissipation is 425mW. At 150mA load and 1.5V output, this limits VIN to ≤5.2V to avoid thermal shutdown.
Does MIC5247-1.5YM5-TR require an input capacitor for stability?
No, MIC5247-1.5YM5-TR does not require an input capacitor for stability. A 1µF input capacitor is recommended only when the bulk supply is >10 inches away or when powered directly from a battery with high source impedance.
MIC5247-1.5YM5-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):
- 1.5V
- 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
MIC5247-1.5YM5-TR FAQ
1.How can I place an order for MIC5247-1.5YM5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5247-1.5YM5-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 MIC5247-1.5YM5-TR reliable?
The price and inventory of MIC5247-1.5YM5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5247-1.5YM5-TR is usually 5 days.
3.What payment methods are accepted for MIC5247-1.5YM5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5247-1.5YM5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5247-1.5YM5-TR?
MIC5247-1.5YM5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5247-1.5YM5-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 MIC5247-1.5YM5-TR?
For technical support, including MIC5247-1.5YM5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5247-1.5YM5-TR requirements.
6.How does Aetrix verify that MIC5247-1.5YM5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5247-1.5YM5-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 MIC5247-1.5YM5-TR meets industry standards.
7.What is the process for return or replacement of MIC5247-1.5YM5-TR?
All MIC5247-1.5YM5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5247-1.5YM5-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 MIC5247-1.5YM5-TR part is unused and in its original packaging.
Return procedure for MIC5247-1.5YM5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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