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Microchip Technology MIC2811-4GJLYML-TR
- Part No.:
- MIC2811-4GJLYML-TR
- Manufacturer:
- Microchip Technology
- Category:
- Power Management - Specialized
- Package:
- 16-VQFN Exposed Pad, 16-MLF®
- Datasheet:
-
MIC2811-4GJLYML-TR.pdf
- Description:
- IC PWR MGMT DGTL TRPL LDO 16-MLF
- Quantity:
- Payment:
- Shipping:
Inventory:1,570
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Product details
Overview
MIC2811-4GJLYML-TR from Micrel is a digital power management IC integrating one 2MHz, 600mA synchronous step-down DC/DC converter and three independent 300mA low-dropout regulators (LDO1/LDO2/LDO3), delivering four fixed output rails (1.2V/1.8V/2.5V/2.7V) for multi-rail portable systems. It operates from 2.7V–5.5V input, achieves up to 86% efficiency at 600mA, and features ±2% output voltage accuracy across all rails.
For engineers reviewing the MIC2811-4GJLYML-TR datasheet, MIC2811-4GJLYML-TR pinout, MIC2811-4GJLYML-TR application, or MIC2811-4GJLYML-TR equivalent, this device supports compact, high-efficiency power sequencing in space-constrained battery-powered applications where low-noise LDOs with bypass capability and thermal shutdown protection are required.
Technical Context
The MIC2811-4GJLYML-TR implements a 2MHz PWM-controlled synchronous buck converter with internal high-side and low-side MOSFETs, enabling use of small 2.2µH inductors and 2.2µF ceramic output capacitors. Its µCap architecture ensures stability with minimal external components while maintaining 86% peak efficiency at 1.2V/600mA output.
LDO1 and LDO2 accept input as low as 1.65V-ideal for post-regulating the DC/DC output-and feature 142mV dropout at 300mA and 70dB PSRR at 1kHz. LDO3 uses VIN (tied to DVIN) as its input source and shares the same ±2% accuracy and 300mA current capability but lacks the BYP pin present on MIC2811 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DC/DC Output Current | 600mA maximum - supports core logic or memory rail in mobile SoC applications without external boost. |
| Switching Frequency | 2MHz nominal - enables compact 2.2µH inductor and reduces EMI fundamental frequency above sensitive bands. |
| LDO Dropout Voltage | 142mV at 300mA (LDO1/LDO2) - allows operation with minimal headroom from DC/DC output (e.g., 1.8V LDO from 1.95V input). |
| Output Voltage Accuracy | ±2% over –40°C to +125°C - ensures reliable voltage margining for processors and RF ICs without external trimming. |
| PSRR @ 1kHz | 70dB for LDO1/LDO2 - suppresses switching noise from DC/DC stage, critical for analog/RF supply domains. |
| Thermal Shutdown | 160°C activation with 23°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Package | 16-pin 3mm × 3mm MLF® - RoHS-compliant leadless package with NiPdAu finish; requires controlled reflow profile per JEDEC J-STD-020. |
Pinout & Package
Package: 16-pin 3mm × 3mm MLF® (MicroLeadFrame), exposed thermal pad, RoHS-compliant, halogen-free mold compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN1 | Enable input for LDO1 | Active-high logic control; must be pulled high or low-floating prohibited to avoid undefined LDO state. |
| 2 BIAS | Internal bias supply | Requires 0.1µF decoupling to SGND; not loadable-serves internal reference and error amplifier circuitry. |
| 3 SGND | Signal ground | Reference for FB, BYP, EN pins; must be routed separately from PGND to prevent noise coupling into control loop. |
| 4 PGND | Power ground | High-current return path for SW and LDO outputs; connects to thermal pad; requires low-inductance layout. |
| 5 SW | Switch node | Drives external inductor; carries high di/dt PWM current-must be short, wide, and isolated from sensitive traces. |
| 6 DVIN | DC/DC input supply | Primary input for buck stage; must be tied directly to VIN; requires local 4.7µF ceramic decoupling to PGND. |
| 7 VIN2 | LDO2 input supply | Accepts 1.65V–5.5V; enables LDO2 to regulate from intermediate rail (e.g., DC/DC output); independent of DVIN. |
| 8 LDO2 | LDO2 regulated output | Fixed 2.5V output (per ordering code); delivers up to 300mA with 142mV dropout and 70dB PSRR at 1kHz. |
| 9 LDO3 | LDO3 regulated output | Fixed 2.7V output; powered from VIN (tied to DVIN); enabled via EN pin; no BYP support. |
| 10 VIN | LDO3 & bias supply | Must be connected to DVIN; powers LDO3 and internal bias circuits-failure here disables all outputs. |
| 11 LDO1 | LDO1 regulated output | Fixed 1.8V output; identical specs to LDO2-142mV dropout, 70dB PSRR, 300mA max-optimized for low-noise analog rails. |
| 12 VIN1 | LDO1 input supply | Accepts 1.65V–5.5V; allows LDO1 to be powered from DC/DC output (e.g., 1.95V → 1.8V) for minimal dropout loss. |
| 13 FB | DC/DC feedback input | Connects directly to DC/DC output for fixed-voltage operation; sets regulation point via internal resistor divider. |
| 14 BYP | Reference bypass | Accepts 0.1µF capacitor to SGND to reduce LDO1/LDO2 output noise; absent on MIC2821; improves PSRR by >10dB. |
| 15 EN | DC/DC enable | Active-high input controlling buck converter and LDO3; logic threshold 1.1V min; 0.2V max for disable-compatible with 1.8V GPIO. |
| 16 EN2 | Enable input for LDO2 | Independent active-high control for LDO2; enables flexible power sequencing (e.g., delay LDO2 turn-on after DC/DC stabilization). |
Key Features
| Feature | Design Value |
|---|---|
| 2MHz PWM DC/DC converter | Enables use of 2.2µH inductors and 2.2µF ceramic capacitors-reduces solution size by >40% vs. 500kHz designs. |
| Triple independent 300mA LDOs | Supports simultaneous regulation of processor core, I/O, and RF/analog rails with separate enable and input controls. |
| BYP pin for LDO1/LDO2 | 0.1µF bypass capacitor reduces output noise to 30µVRMS (10Hz–100kHz) and boosts PSRR by >15dB below 10kHz. |
| ±2% output voltage accuracy | Guaranteed over full temperature range (–40°C to +125°C) and line/load conditions-meets tight SoC VDD tolerance requirements. |
| Thermal shutdown with hysteresis | 160°C trip point and 23°C hysteresis prevent thermal oscillation and ensure safe recovery after overload removal. |
| Low 142mV dropout (LDO1/LDO2) | Permits efficient post-regulation from DC/DC output (e.g., 1.2V DC/DC → 1.05V LDO), minimizing power loss and heat. |
Applications
| Mobile Phone Baseband Power | Portable Media Player Audio Supply |
|---|---|
Use Scenario: Powers ARM-based baseband processor requiring 1.2V core, 1.8V I/O, 2.5V interface, and 2.7V RF bias in a slim handset. IC Role / Device Role / Timing Role: MIC2811-4GJLYML-TR provides all four regulated rails from single-cell Li-ion (3.0–4.2V), with sequenced enable control. Use Value: Eliminates need for four discrete regulators, reducing BOM count by 75% and PCB area by >30% versus discrete solution. |
Use Scenario: Supplies low-noise 1.8V for DAC/codec and 2.5V for display driver in flash-based MP3 player with 8-hour battery life. IC Role / Device Role / Timing Role: MIC2811-4GJLYML-TR's LDO1/LDO2 deliver <30µVRMS noise and 70dB PSRR to preserve audio SNR >95dB. Use Value: BYP pin reduces LDO output noise by 40%, enabling direct connection to audio ICs without additional LC filtering. |
| Mobile TV Tuner Module | Handheld GPS Receiver |
Use Scenario: Powers DVB-H tuner IC requiring clean 1.2V digital, 1.8V analog, 2.5V IF, and 2.7V LNA supply in thermally constrained module. IC Role / Device Role / Timing Role: MIC2811-4GJLYML-TR's 142mV LDO dropout and 2MHz DC/DC allow stable 1.2V rail from declining battery (3.3V→2.8V). Use Value: Maintains 1.2V output down to 2.92V input-extending usable battery range by 12% vs. legacy 3.3V-only solutions. |
Use Scenario: Delivers 1.2V for GPS baseband, 1.8V for RF front-end, 2.5V for serial interface, and 2.7V for antenna switch in ultra-low-power wearable tracker. IC Role / Device Role / Timing Role: MIC2811-4GJLYML-TR's 0.2µA shutdown current and independent LDO enables optimize sleep-mode power budget. Use Value: Reduces system quiescent current by 65% versus discrete LDOs-extending GPS tracking time from 18h to >42h on 300mAh cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-output power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023BRSBT | 3.3V/1.8V/1.2V/1.2V outputs; 2.25MHz DC/DC; integrated 32kHz RTC oscillator; no BYP pin; 20-pin QFN. | Includes RTC and I²C interface for dynamic voltage scaling-suited for Linux-based handhelds needing firmware control. | Select TPS65023BRSBT when system requires programmable sequencing, real-time clock, or I²C monitoring-not for fixed-rail, low-noise analog focus. |
| RT8059ZSP | 1.2V/1.8V/2.5V/3.3V outputs; 1.5MHz DC/DC; 200mA LDOs; no thermal shutdown; 16-pin QFN (4mm×4mm). | Smaller LDO current rating and missing thermal protection limit use in sustained-load or high-ambient environments. | Choose RT8059ZSP only for cost-sensitive, low-power (<150mA LDO loads) applications where thermal margin is guaranteed. |
Compared with TPS65023BRSBT and RT8059ZSP, the MIC2811-4GJLYML-TR offers superior LDO noise performance (30µVRMS vs. >60µVRMS), higher LDO current (300mA vs. 200mA), and dedicated BYP functionality-making it optimal for analog/RF-intensive portable designs where fixed-rail simplicity and signal integrity are prioritized over programmability.
Availability
MIC2811-4GJLYML-TR is available at Aetrix Electronics and suitable for mobile phones, portable media players, and mobile television receivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC2811-4GJLYML-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 high-performance analog and power management ICs before its acquisition by Microchip Technology in 2015.
The MIC2811 product line was designed specifically for space-constrained, battery-powered portable electronics requiring integrated multi-rail power with low noise, high efficiency, and robust thermal protection.
FAQ
What output voltages does the MIC2811-4GJLYML-TR provide?
The MIC2811-4GJLYML-TR provides four fixed output voltages: 1.2V (DC/DC), 1.8V (LDO1), 2.5V (LDO2), and 2.7V (LDO3). These values are factory-programmed and non-adjustable; the "4GJLYML" suffix explicitly denotes this voltage combination per Micrel's ordering information table.
Does the MIC2811-4GJLYML-TR support independent enable control for all regulators?
Yes-the MIC2811-4GJLYML-TR provides individual enable inputs: EN for DC/DC and LDO3, EN1 for LDO1, EN2 for LDO2, and no EN3 (as that pin is BYP on MIC2811). This allows precise power sequencing-for example, enabling DC/DC first, then LDO1/LDO2 after soft-start completion.
What is the purpose of the BYP pin on the MIC2811-4GJLYML-TR?
The BYP pin on the MIC2811-4GJLYML-TR accepts a 0.1µF capacitor to SGND to bypass the internal reference, reducing output noise on LDO1 and LDO2 to 30µVRMS (10Hz–100kHz) and improving PSRR by >15dB below 10kHz-critical for noise-sensitive analog/RF supplies.
Can the MIC2811-4GJLYML-TR operate with input voltage below 2.7V?
No-the MIC2811-4GJLYML-TR requires DVIN and VIN ≥2.7V for DC/DC and LDO3 operation. However, LDO1 and LDO2 accept inputs as low as 1.65V on VIN1/VIN2, enabling them to be powered from the DC/DC output (e.g., 1.2V rail boosted to 1.35V minimum for LDO1 input).
What package type and thermal characteristics does the MIC2811-4GJLYML-TR use?
The MIC2811-4GJLYML-TR uses a 16-pin 3mm × 3mm MLF® package with exposed thermal pad. Its junction-to-ambient thermal resistance (θJA) is 56°C/W, and thermal shutdown activates at 160°C with 23°C hysteresis-requiring adequate copper pour and vias under the pad for >300mA continuous operation.
MIC2811-4GJLYML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad, 16-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Handheld/Mobile Devices
- Current - Supply:
- -
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MLF® (4x4)
MIC2811-4GJLYML-TR FAQ
1.How can I place an order for MIC2811-4GJLYML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2811-4GJLYML-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 MIC2811-4GJLYML-TR reliable?
The price and inventory of MIC2811-4GJLYML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2811-4GJLYML-TR is usually 5 days.
3.What payment methods are accepted for MIC2811-4GJLYML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2811-4GJLYML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2811-4GJLYML-TR?
MIC2811-4GJLYML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2811-4GJLYML-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 MIC2811-4GJLYML-TR?
For technical support, including MIC2811-4GJLYML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2811-4GJLYML-TR requirements.
6.How does Aetrix verify that MIC2811-4GJLYML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2811-4GJLYML-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 MIC2811-4GJLYML-TR meets industry standards.
7.What is the process for return or replacement of MIC2811-4GJLYML-TR?
All MIC2811-4GJLYML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2811-4GJLYML-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 MIC2811-4GJLYML-TR part is unused and in its original packaging.
Return procedure for MIC2811-4GJLYML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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