My Inquiry
My Account
Microchip Technology MIC5247-1.85YM5-TR
- Part No.:
- MIC5247-1.85YM5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC5247-1.85YM5-TR.pdf
- Description:
- IC REG LIN 1.85V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,985
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC5247-1.85YM5-TR from Micrel is a fixed-output 1.85V, 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 enable pin for zero-off-mode current. It is designed for RF-sensitive battery-powered systems such as cellular front-end power rails.
For engineers reviewing the MIC5247-1.85YM5-TR datasheet, MIC5247-1.85YM5-TR pinout, MIC5247-1.85YM5-TR application, or MIC5247-1.85YM5-TR equivalent, key selection criteria include dropout voltage at full load, noise performance with/without bypass capacitor, thermal resistance of SOT-23-5 package, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The MIC5247-1.85YM5-TR uses a P-channel MOSFET pass device with N-channel active clamp for fast transient recovery and controlled turnoff. Its reference bypass (BYP) pin connects to an external 0.01µF capacitor to reduce internal reference noise, directly lowering output voltage noise floor.
It integrates thermal shutdown (150°C trip, 10°C hysteresis), current limiting (160–300mA), and under-voltage lockout. The enable input is CMOS-compatible (VIH ≥ 1.6V, VIL ≤ 0.4V), requiring explicit logic control - floating EN is prohibited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.85V ±1% at 25°C; supports stable core supply for 1.8V logic with margin. |
| Max Output Current | 150mA continuous; sufficient for RF transceivers, baseband processors, and sensor interfaces. |
| Dropout Voltage | 150mV at 150mA load; enables operation from Li-ion (3.0V min) or dual-cell alkaline inputs. |
| Ground Current | 85µA constant over full load range (0–150mA); ensures predictable battery life in portable devices. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BYP capacitor; meets stringent RF LNA and VCO supply requirements. |
| 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 (M5), 2.9mm × 1.6mm × 1.1mm body, exposed pad not present (non-thermal variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply rail | Accepts 2.7V–6V input; requires no mandatory input capacitor unless >10" from bulk source. |
| 2 (GND) | Power ground reference | Common return for IN, OUT, BYP, and EN; must be low-impedance for noise integrity. |
| 3 (EN) | CMOS enable input | Active-high logic control; <0.4V disables regulator to ~0.2µA shutdown current; must not float. |
| 4 (BYP) | Reference bypass node | Connects to 0.01µF capacitor to GND to reduce reference noise; optional but critical for RF apps. |
| 5 (OUT) | Regulated output | Delivers 1.85V ±1%; requires ≥1µF low-ESR ceramic capacitor for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 30µVRMS with 0.01µF BYP cap - enables clean power for VCOs and LNA stages without additional filtering. |
| Load-independent quiescent current | 85µA across 0–150mA load - simplifies battery life estimation and eliminates load-dependent bias drift. |
| Active output clamp | N-channel MOSFET clamps output during load removal - prevents overshoot and cuts transient recovery time by >50% vs. standard LDOs. |
| Stability with ceramic capacitors | Guaranteed stable with ≥1µF X5R/X7R ceramic output caps - eliminates need for larger, costlier tantalum or electrolytic types. |
| Zero-off-mode current | 0.2µA typical shutdown current - preserves battery charge during system sleep modes in handheld devices. |
Applications
| Cellular Front-End Power | Portable Audio Codec Supply |
|---|---|
Use Scenario: Powering RF transceiver LNA and mixer stages in GSM/UMTS handsets where supply noise directly impacts EVM and adjacent channel leakage. IC Role / Device Role / Timing Role: Ultra-low-noise post-regulator for DC-DC converter outputs, providing quiet 1.85V bias to analog RF blocks. Use Value: 30µVRMS noise and 50dB PSRR prevent switching artifacts from degrading receiver sensitivity and transmit spectral purity. |
Use Scenario: Supplying high-resolution audio ADC/DAC cores in Bluetooth headsets and voice-controlled wearables requiring low THD+N. IC Role / Device Role / Timing Role: Precision analog rail generator with tight line/load regulation (±2% total) for reference-sensitive conversion circuits. Use Value: 1% initial accuracy and <3% load regulation ensure consistent full-scale codes across battery discharge cycle. |
| SMPS Post-Regulator | Low-Power Microcontroller Core Rail |
Use Scenario: Cleaning noisy 3.3V buck converter output to feed sensitive PLLs or clock buffers in embedded wireless SoCs. IC Role / Device Role / Timing Role: Low-dropout noise filter stage with 150mV dropout, enabling efficient 3.3V→1.85V conversion without headroom penalty. Use Value: Fast transient response and active clamp minimize voltage droop/sag during burst-mode digital activity, preserving timing margin. |
Use Scenario: Providing regulated 1.85V core voltage to ARM Cortex-M0+ or RISC-V microcontrollers in energy-harvesting sensors. IC Role / Device Role / Timing Role: Enable-controlled primary supply with sub-1µA shutdown current, synchronized to MCU sleep/wake states. Use Value: "Zero" off-mode current extends shelf life and operational runtime in battery-backed IoT endpoints. |
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 |
|---|---|---|---|
| MCP1700-1802E/TO | 1.8V fixed output, 250mA, 17µVRMS noise, no BYP pin, SOT-23-3 (3-pin, no EN/BYP) | Lacks enable and noise-bypass capability; limited to always-on, lower-current roles | Select when board space is constrained and ultra-low noise is secondary to cost and footprint. |
| Torex XC6206P182MR-G | 1.8V fixed, 250mA, 40µVRMS noise, no BYP pin, SOT-23-5 with EN but no dedicated BYP terminal | Higher noise floor, no external reference bypass path - unsuitable for RF-critical nodes | Choose only for non-RF applications where 1.8V (not 1.85V) matches system voltage plan and BYP is unused. |
Compared with MCP1700-1802E/TO and XC6206P182MR-G, the MIC5247-1.85YM5-TR uniquely delivers 1.85V precision, dedicated BYP pin for sub-30µV noise tuning, and active-clamp transient response - making it the sole option for RF front-end and high-fidelity analog supply chains requiring both voltage specificity and noise headroom.
Availability
MIC5247-1.85YM5-TR is available at Aetrix Electronics and suitable for cellular front-end power, portable audio codec supply, SMPS post-regulation, low-power microcontroller core rails, and RF module biasing requiring stable component supply across industrial temperature range (–40°C to +125°C).
Supply support for MIC5247-1.85YM5-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 analog and mixed-signal semiconductor company acquired by Microchip Technology in 2015; known for high-performance power management and timing solutions.
The MIC5247 family was engineered specifically for ultra-low-noise, battery-efficient linear regulation in handheld wireless devices - emphasizing RF immunity, minimal quiescent current, and ceramic-capacitor compatibility.
FAQ
What is the minimum input voltage required for MIC5247-1.85YM5-TR to regulate properly?
The MIC5247-1.85YM5-TR requires a minimum input voltage of 2.7V per its operating rating. With a 150mV dropout at 150mA, it maintains regulation down to VIN = 2.0V only if output load is reduced - but 2.7V is the guaranteed functional lower limit across temperature and process variation. Always maintain ≥2.7V input for full-spec operation of MIC5247-1.85YM5-TR.
Does MIC5247-1.85YM5-TR require an input capacitor?
No, MIC5247-1.85YM5-TR does not require an input capacitor for stability. A 1µF ceramic capacitor is recommended only when the bulk supply is located more than 10 inches from the device or when powered directly from a battery with high source impedance. This design choice reduces BOM count and PCB area for MIC5247-1.85YM5-TR implementations.
Can the BYP pin of MIC5247-1.85YM5-TR be left unconnected?
Yes, the BYP pin of MIC5247-1.85YM5-TR may be left open with no functional impact. However, leaving it unconnected forfeits the 30µVRMS noise performance - typical noise rises to ~60–80µVRMS without the 0.01µF bypass capacitor. For RF or high-precision analog use, connecting BYP to GND via 0.01µF is mandatory in MIC5247-1.85YM5-TR designs.
What is the thermal resistance (θJA) of MIC5247-1.85YM5-TR in its SOT-23-5 package?
The junction-to-ambient thermal resistance (θJA) of MIC5247-1.85YM5-TR in the SOT-23-5 (M5) package is 235°C/W under standard JEDEC 2-layer board conditions. With 150mA load and 150mV dropout, power dissipation is 22.5mW - resulting in <6°C junction rise above ambient, well within safe operating limits without heatsinking for MIC5247-1.85YM5-TR.
Is MIC5247-1.85YM5-TR compatible with 1.0µF ceramic output capacitors?
Yes, MIC5247-1.85YM5-TR is explicitly characterized and guaranteed stable with ≥1.0µF X5R or X7R ceramic output capacitors. Unlike older LDOs, it does not require high-ESR tantalum or electrolytic types. Using 1.0µF ceramic minimizes board area and cost while delivering optimal transient response for MIC5247-1.85YM5-TR applications.
MIC5247-1.85YM5-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):
- 1.85V
- 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
MIC5247-1.85YM5-TR FAQ
1.How can I place an order for MIC5247-1.85YM5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5247-1.85YM5-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 MIC5247-1.85YM5-TR reliable?
The price and inventory of MIC5247-1.85YM5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5247-1.85YM5-TR is usually 5 days.
3.What payment methods are accepted for MIC5247-1.85YM5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5247-1.85YM5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5247-1.85YM5-TR?
MIC5247-1.85YM5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5247-1.85YM5-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 MIC5247-1.85YM5-TR?
For technical support, including MIC5247-1.85YM5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5247-1.85YM5-TR requirements.
6.How does Aetrix verify that MIC5247-1.85YM5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5247-1.85YM5-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 MIC5247-1.85YM5-TR meets industry standards.
7.What is the process for return or replacement of MIC5247-1.85YM5-TR?
All MIC5247-1.85YM5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5247-1.85YM5-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 MIC5247-1.85YM5-TR part is unused and in its original packaging.
Return procedure for MIC5247-1.85YM5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC5247-1.85YM5-TR Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
