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Microchip Technology MIC5247-1.8YML-TR
- Part No.:
- MIC5247-1.8YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5247-1.8YML-TR.pdf
- Description:
- IC REG LINEAR 1.8V 150MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:219
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Product details
Overview
MIC5247-1.8YML-TR from Micrel is a 1.8V fixed-output, 150mA ultra-low-noise CMOS linear voltage regulator in a 6-pin 2mm × 2mm MLF™ package, featuring 1% initial accuracy, 85µA load-independent ground current, and 30µVRMS output noise (10Hz–100kHz) with 0.01µF bypass capacitor - optimized for RF power stages in battery-powered handheld devices.
For engineers reviewing the MIC5247-1.8YML-TR datasheet, MIC5247-1.8YML-TR pinout, MIC5247-1.8YML-TR application, or MIC5247-1.8YML-TR equivalent, key selection criteria include dropout voltage at 150mA (150mV), PSRR of 50dB at ≤1kHz, thermal shutdown at 150°C, logic-compatible enable input, and stability with low-ESR ceramic capacitors down to 1µF.
Technical Context
The MIC5247-1.8YML-TR uses a P-channel MOSFET pass device with an N-channel active clamp for fast transient recovery and overshoot suppression during load steps. Its reference bypass (BYP) pin connects to a 0.01µF capacitor to shunt internal reference noise, reducing output voltage noise by >50% versus no bypass.
It integrates under-voltage lockout, thermal shutdown with 10°C hysteresis, and current limiting (160–300mA). The enable input is CMOS-compatible (VIH ≥ 1.6V, VIL ≤ 0.4V), and shutdown reduces quiescent current to ≤1µA - critical for zero-power standby in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% (initial accuracy at 25°C); ensures stable core supply for 1.8V logic without external feedback. |
| Max Output Current | 150mA continuous; supports RF transceivers, baseband processors, and sensor interfaces in compact wireless modules. |
| Dropout Voltage | 150mV at 150mA; enables operation from 2.7V input down to 1.8V output - ideal for single-cell Li-ion or dual-cell NiMH systems. |
| Ground Current | 85µA (typical), load-independent; maintains ultra-low system standby power regardless of load current variation. |
| Output Noise | 30µVRMS (10Hz–100kHz, CBYP = 0.01µF); meets stringent RF LNA and VCO supply noise requirements. |
| PSRR | 50dB at ≤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 GPIOs without level-shifting. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF™ (exposed pad grounded), θJA = 90°C/W - suitable for high-density PCB layouts with limited thermal mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | CMOS enable input | Active-high logic control; drives regulator into <1µA shutdown state when low - eliminates need for external load switches. |
| 2 - GND | Ground reference | Primary signal and power return; internally connected to exposed pad for low-impedance thermal path. |
| 3 - IN | Input supply | Accepts 2.7V–6V input; no input capacitor required unless source impedance exceeds 1Ω or distance >10 inches. |
| 4 - OUT | Regulated output | Delivers 1.8V ±1% to load; requires ≥1µF low-ESR ceramic capacitor for stability. |
| 5 - NC | No connection | Unbonded die pad; must be left floating or tied to GND per layout best practice - no electrical function. |
| 6 - BYP | Reference bypass | Connects to 0.01µF capacitor to reduce reference noise; directly lowers output RMS noise and improves PSRR above 10kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise architecture | 30µVRMS output noise with 0.01µF BYP cap - enables clean power for RF front-end ICs without additional filtering. |
| Active output clamp | N-channel MOSFET clamp prevents output overshoot during rapid load removal (e.g., burst-mode TX), cutting recovery time by >60% vs. standard LDOs. |
| Load-independent quiescent current | 85µA constant ground current across 0–150mA load - simplifies battery life estimation and eliminates load-dependent leakage concerns. |
| Thermal shutdown with hysteresis | 150°C trip point + 10°C hysteresis - prevents thermal cycling in sustained high-power dissipation scenarios (e.g., 150mA @ 2.7V input). |
| Stability with ceramic capacitors | Guaranteed stable with ≥1µF X5R/X7R ceramic output caps - eliminates need for larger, more expensive tantalum or electrolytic capacitors. |
Applications
| Cellular Transceiver Power | Low-Power Microcontroller Core |
|---|---|
Use Scenario: Supplying VCC to GSM/EDGE PA driver stages and RX LNA blocks in feature phones. IC Role / Device Role / Timing Role: Ultra-low-noise 1.8V bias rail generator with fast transient response to handle pulsed RF load currents up to 150mA. Use Value: 30µVRMS noise and 50dB PSRR prevent AM-to-PM distortion and phase noise degradation in transmit paths. | Use Scenario: Powering ARM Cortex-M0+ or RISC-V MCU cores operating at 1.8V in wearable sensors. IC Role / Device Role / Timing Role: Primary core voltage regulator with logic-enable shutdown for deep-sleep modes. Use Value: 85µA ground current and <1µA shutdown current extend battery runtime in multi-year IoT deployments. |
| Portable Audio Codec Bias | SMPS Post-Regulator |
Use Scenario: Providing clean analog supply to 1.8V DAC/ADC sections in Bluetooth headsets. IC Role / Device Role / Timing Role: Low-noise post-regulator decoupling switching converter ripple before audio signal chain. Use Value: 0.01µF BYP capacitor reduces broadband noise floor by 12dB, improving SNR by ≥3dB in 24-bit audio paths. | Use Scenario: Tightening output regulation and reducing ripple on buck converter outputs for FPGA I/O banks. IC Role / Device Role / Timing Role: Precision linear post-regulator correcting line/load drift and high-frequency noise from DC/DC stage. Use Value: ±1% initial accuracy and 2%/V line regulation maintain 1.8V tolerance across 2.7–5.5V input variations from primary SMPS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/MB | 150mA, 1.8V, 175mV dropout, 65µVRMS noise, SOT-23-3 (no EN/BYP) | Lacks enable and bypass pins; simpler footprint but higher noise and no shutdown control | Select when board space is constrained and ultra-low noise is secondary to cost |
| Torex XC6206P182MR-G | 150mA, 1.8V, 250mV dropout, 40µVRMS noise, SOT-25 (EN only, no BYP) | Higher dropout and noise; no bypass pin limits RF-grade noise performance | Choose for legacy designs where BYP functionality is unused and thermal margin is ample |
Compared with MCP1700T-1802E/MB and XC6206P182MR-G, the MIC5247-1.8YML-TR uniquely delivers 30µVRMS noise *with* independent enable and bypass control in a thermally efficient MLF package - making it the only option among the three qualified for RF-sensitive 1.8V core rails requiring simultaneous low noise, fast transient response, and zero-power shutdown.
Availability
MIC5247-1.8YML-TR is available at Aetrix Electronics and suitable for cellular transceiver power, low-power microcontroller core supply, portable audio codec bias, and SMPS post-regulation requiring stable component supply across industrial temperature range (–40°C to +125°C).
Supply support for MIC5247-1.8YML-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, battery-efficient linear regulation in handheld wireless devices - emphasizing precision, minimal quiescent current, and RF-clean output performance.
FAQ
What is the maximum input voltage rating for MIC5247-1.8YML-TR?
The absolute maximum input voltage for MIC5247-1.8YML-TR is +7V, but the recommended operating range is +2.7V to +6V. Exceeding 6V risks violating thermal limits under full 150mA load, especially in the MLF package with θJA = 90°C/W. For reliable operation at 150mA, VIN should not exceed 5.2V when ambient temperature is 25°C.
Does MIC5247-1.8YML-TR require an input capacitor?
No, MIC5247-1.8YML-TR does not require an input capacitor for stability. A 1µF ceramic capacitor is recommended only if the input source is located more than 10 inches from the device or if the supply is a battery with high source impedance - to prevent oscillation during large transient current demands.
Can MIC5247-1.8YML-TR operate without the bypass (BYP) capacitor?
Yes, MIC5247-1.8YML-TR functions normally without the BYP capacitor, delivering 1.8V output with typical noise of ~65µVRMS. However, adding a 0.01µF capacitor from BYP to GND reduces output noise to 30µVRMS and improves PSRR above 10kHz - essential for RF and high-resolution analog applications.
What is the thermal shutdown behavior of MIC5247-1.8YML-TR?
MIC5247-1.8YML-TR activates thermal shutdown at 150°C junction temperature and remains latched off until junction temperature falls by 10°C (hysteresis). During shutdown, output is disabled and ground current drops to ≤1µA. Recovery is automatic upon cooling - no external reset is needed.
Is MIC5247-1.8YML-TR pin-compatible with other MIC5247 variants in the MLF package?
Yes, all MIC5247-x.xYML variants share identical 6-pin MLF pinout (IN, GND, EN, OUT, NC, BYP), including MIC5247-1.8YML-TR. Voltage-setting is internal; only the marking and test binning differ - enabling drop-in replacement across 1.5V–2.4V fixed-output versions without PCB changes.
MIC5247-1.8YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad, 6-MLF®
- 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):
- 1.8V
- 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:
- 6-DFN (2x2)
MIC5247-1.8YML-TR FAQ
1.How can I place an order for MIC5247-1.8YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5247-1.8YML-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 MIC5247-1.8YML-TR reliable?
The price and inventory of MIC5247-1.8YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5247-1.8YML-TR is usually 5 days.
3.What payment methods are accepted for MIC5247-1.8YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5247-1.8YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5247-1.8YML-TR?
MIC5247-1.8YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5247-1.8YML-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 MIC5247-1.8YML-TR?
For technical support, including MIC5247-1.8YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5247-1.8YML-TR requirements.
6.How does Aetrix verify that MIC5247-1.8YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5247-1.8YML-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 MIC5247-1.8YML-TR meets industry standards.
7.What is the process for return or replacement of MIC5247-1.8YML-TR?
All MIC5247-1.8YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5247-1.8YML-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 MIC5247-1.8YML-TR part is unused and in its original packaging.
Return procedure for MIC5247-1.8YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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