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Microchip Technology MIC47100-1.2YML-TR
- Part No.:
- MIC47100-1.2YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC47100-1.2YML-TR.pdf
- Description:
- IC REG LINEAR 1.2V 1A 8MLF
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC47100-1.2YML-TR from Micrel is a fixed-output 1.2V, 1A high-speed low-VIN LDO regulator with NMOS pass device, 80mV dropout at full load, stable with 1µF ceramic output capacitor, and thermally enhanced 2mm × 2mm MLF® package - designed for point-of-load core voltage regulation in FPGAs and mobile processors.
For engineers reviewing the MIC47100-1.2YML-TR datasheet, MIC47100-1.2YML-TR pinout, MIC47100-1.2YML-TR application, or MIC47100-1.2YML-TR equivalent, key selection criteria include dual-supply operation (1.0–3.6V input / 2.3–5.5V bias), ±1.5% initial output accuracy, PSRR >50dB at 100kHz, UVLO on both rails, and thermal shutdown at 160°C.
Technical Context
The MIC47100-1.2YML-TR employs an NMOS pass transistor architecture enabling ultra-low output impedance and fast transient response to dynamic load steps typical in FPGA/DSP core supplies. Its dual-rail design separates power path (VIN) from control circuitry (VBIAS), allowing efficient low-voltage conversion while maintaining stability under rapid load changes.
It integrates independent UVLO on both VIN and VBIAS inputs, ensuring safe turn-on only when both supplies meet thresholds (0.7V/1.9V respectively), and features CMOS-compatible active-high enable with <1µA shutdown current. The regulator operates across –40°C to +125°C junction temperature with 90°C/W θJA in its MLF® package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1.5% initial accuracy - ensures precise core rail compliance for 1.2V I/O or core domains. |
| Max Output Current | 1A continuous - supports high-current digital loads including FPGA core rails and DSP subsystems. |
| Dropout Voltage | 80mV at 1A - enables operation from 1.28V input, critical for battery-powered or post-regulated systems. |
| PSRR | 55dB at 100kHz - suppresses switching noise from upstream DC/DC converters in multi-rail power architectures. |
| Stability | Guaranteed with ≥1µF ceramic output capacitor - eliminates need for bulky tantalum or electrolytic capacitors. |
| Enable Threshold | Logic-high enable ≥1.0V, logic-low shutdown ≤0.2V - compatible with standard 1.8V/3.3V GPIO without level-shifting. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal layout. |
Pinout & Package
Package: 8-pin 2mm × 2mm MLF® with exposed thermal pad (RoHS-compliant NiPdAu finish, halogen-free mold compound).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 IN | Input Supply | Power input to NMOS pass transistor; accepts 1.0–3.6V; must be bypassed with ≥1µF ceramic capacitor. |
| 3 GND | Ground Reference | Common return for VIN, VBIAS, and OUT; requires low-impedance connection to exposed pad and system ground plane. |
| 4 BIAS | Bias Supply | Provides power to internal control circuitry (2.3–5.5V); decoupling improves transient response and PSRR. |
| 5 EN | Enable Input | Active-high TTL/CMOS-compatible control; open or low disables regulator with <1µA shutdown current. |
| 6 FB | Feedback Input | Internally connected to fixed 1.2V reference; used for closed-loop regulation - no external resistor required. |
| 7,8 OUT | Regulated Output | Delivers stable 1.2V up to 1A; connects directly to load with minimal trace inductance for optimal transient performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Supply Architecture | VIN (1.0–3.6V) powers pass device; VBIAS (2.3–5.5V) powers control circuitry - enables independent optimization of efficiency and stability. |
| NMOS Pass Transistor | Ultra-low output impedance enables <500µs turn-on time and rapid recovery from 1A load transients - critical for processor burst modes. |
| Low-ESR Capacitor Support | Stable with 1µF X7R/X5R ceramic output capacitor - reduces board area and cost vs. traditional LDOs requiring ≥10µF. |
| UVLO with Dual Thresholds | Independent 0.7V (VIN) and 1.9V (VBIAS) undervoltage lockouts prevent erratic startup and ensure coordinated rail sequencing. |
| Thermal Enhancement | Exposed pad in 2mm × 2mm MLF® package achieves 90°C/W θJA - supports 1A operation up to 71°C ambient at 1.8VIN/1.2VOUT. |
Applications
| Mobile Processor Core Supply | FPGA I/O Bank Regulation |
|---|---|
|
Use Scenario: Powering ARM Cortex-A series CPU cores in handheld devices where input is derived from a 1.8V buck converter. IC Role / Device Role / Timing Role: Low-dropout post-regulator delivering tightly regulated 1.2V core voltage with fast transient response to dynamic clock-gating events. Use Value: 80mV dropout enables >93% efficiency at 1A; ±1.5% accuracy maintains SoC timing margins under varying load and temperature. |
Use Scenario: Providing clean 1.2V supply to LVDS or SSTL I/O banks in Xilinx Artix-7 FPGAs during configuration and high-speed data transfer. IC Role / Device Role / Timing Role: Point-of-load LDO placed adjacent to FPGA package to minimize IR drop and supply noise coupling into sensitive I/O interfaces. Use Value: 55dB PSRR at 100kHz attenuates switching noise from adjacent DC/DC converters, preserving signal integrity and jitter performance. |
| DSP Power Sequencing | Portable Medical Sensor Hub |
|
Use Scenario: Regulating 1.2V supply for TI C6000-series DSPs in portable ultrasound units requiring strict power-up sequencing. IC Role / Device Role / Timing Role: Enabled LDO with independent VIN/VBIAS UVLO ensuring controlled ramp-up before DSP initialization begins. Use Value: Dual UVLO prevents partial activation; active-high EN allows synchronization with system controller GPIO for deterministic boot sequence. |
Use Scenario: Powering mixed-signal sensor interface ICs (ADCs, op-amps) in battery-operated wearable ECG monitors. IC Role / Device Role / Timing Role: Ultra-low-noise (63µVRMS) LDO supplying analog front-end circuits where supply ripple directly impacts measurement resolution. Use Value: 1µF ceramic stability and low ground current (<6µA at 1A) extend battery life while maintaining <1 LSB error in 16-bit ADC conversions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B122MR-G | Single-supply (1.5–6.0V), 1A, 1.2V fixed, 150mV dropout, requires ≥2.2µF ceramic output cap. | Lacks dual-rail architecture and bias supply - simpler but less optimized for low-VIN point-of-load use cases. | Select when board space permits larger output capacitance and system lacks dedicated bias rail. |
| Analog Devices ADP1740ACPZ-1.2-R7 | Single-supply (1.6–3.6V), 1A, 1.2V fixed, 120mV dropout, 75dB PSRR at 100kHz, requires ≥4.7µF ceramic output cap. | Higher PSRR but higher dropout and larger minimum output capacitance - better for noise-sensitive analog loads, less suitable for ultra-low-VIN. | Select when upstream noise is extreme and input voltage margin allows ≥1.32V minimum. |
Compared with XC6210B122MR-G and ADP1740ACPZ-1.2-R7, the MIC47100-1.2YML-TR uniquely supports 1.0V input with 80mV dropout and dual-rail operation - enabling direct regulation from 1.28V sources and superior transient response in FPGA/DSP core rails where input headroom is constrained.
Availability
MIC47100-1.2YML-TR is available at Aetrix Electronics and suitable for FPGA power delivery, mobile processor core regulation, and portable medical sensor hubs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC47100-1.2YML-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 power management, analog, and RF solutions before its acquisition by Microchip Technology in 2015.
The MIC47100 family was developed as a high-speed dual-supply LDO platform targeting point-of-load regulation in space-constrained, multi-rail digital systems - emphasizing low dropout, fast transient response, and minimal external components.
FAQ
What is the minimum input voltage required for MIC47100-1.2YML-TR to regulate 1.2V output?
The MIC47100-1.2YML-TR requires a minimum input voltage of 1.0V, but to maintain regulation at 1A load, the input must exceed 1.28V due to its 80mV dropout voltage. At lighter loads, regulation is possible down to 1.2V input. The device includes UVLO that prevents turn-on until VIN reaches 0.7V, ensuring safe startup behavior.
Does MIC47100-1.2YML-TR require an external feedback resistor network?
No, the MIC47100-1.2YML-TR is a fixed-output variant with internal feedback tied to the FB pin; no external resistors are needed. The FB pin is internally connected to the 1.2V reference and must be left unconnected or tied directly to OUT per the datasheet. Only adjustable versions (e.g., MIC47100YML) require external R1/R2 dividers.
Can MIC47100-1.2YML-TR operate without a bias supply (VBIAS) connection?
No - the MIC47100-1.2YML-TR requires a valid VBIAS supply between 2.3V and 5.5V to power its internal control circuitry. Without VBIAS, the regulator remains disabled even if VIN and EN are valid. The datasheet specifies independent UVLO on VBIAS (1.9V threshold), confirming mandatory bias rail operation.
What is the thermal performance of MIC47100-1.2YML-TR in its MLF® package?
In the 2mm × 2mm MLF® package, the MIC47100-1.2YML-TR has a junction-to-ambient thermal resistance (θJA) of 90°C/W. At 1A load with 1.8V input and 1.2V output, power dissipation is 0.6W, allowing a maximum ambient temperature of 71°C with minimum footprint layout - verified in the datasheet's thermal calculation example.
Is MIC47100-1.2YML-TR compatible with 1µF X5R ceramic output capacitors?
Yes - the MIC47100-1.2YML-TR is explicitly characterized and guaranteed stable with ≥1µF X5R or X7R ceramic output capacitors. The datasheet recommends X7R for best temperature stability (±15% capacitance shift), but X5R is acceptable. Y5V/Z5U dielectrics are discouraged due to excessive value drift over temperature.
MIC47100-1.2YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad, 8-MLF®
- 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 6 µA
- Current - Supply (Max):
- -
- PSRR:
- 80dB ~ 45dB (1kHz ~ 500kHz)
- 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:
- 8-MLF® (2x2)
MIC47100-1.2YML-TR FAQ
1.How can I place an order for MIC47100-1.2YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC47100-1.2YML-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 MIC47100-1.2YML-TR reliable?
The price and inventory of MIC47100-1.2YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC47100-1.2YML-TR is usually 5 days.
3.What payment methods are accepted for MIC47100-1.2YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC47100-1.2YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC47100-1.2YML-TR?
MIC47100-1.2YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC47100-1.2YML-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 MIC47100-1.2YML-TR?
For technical support, including MIC47100-1.2YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC47100-1.2YML-TR requirements.
6.How does Aetrix verify that MIC47100-1.2YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC47100-1.2YML-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 MIC47100-1.2YML-TR meets industry standards.
7.What is the process for return or replacement of MIC47100-1.2YML-TR?
All MIC47100-1.2YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC47100-1.2YML-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 MIC47100-1.2YML-TR part is unused and in its original packaging.
Return procedure for MIC47100-1.2YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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