Microchip Technology MIC2211-SGYML-TR

Overview

MIC2211-SGYML-TR from Micrel is a dual µCap low-dropout linear regulator IC with fixed 3.3V/1.8V outputs, delivering 300mA on VOUT2 and 150mA on VOUT1, operating from 2.25V–5.5V input, featuring 80mV dropout at 100mA and 48µA total quiescent current - ideal for space-constrained, battery-powered baseband processor power domains in cellular handsets.

For engineers reviewing the MIC2211-SGYML-TR datasheet, MIC2211-SGYML-TR pinout, MIC2211-SGYML-TR application, or MIC2211-SGYML-TR equivalent, key selection criteria include dual-output sequencing capability via independent TTL-compatible enable pins (EN1/EN2), ceramic capacitor stability (1µF per output + 0.01µF bypass), and thermal/current protection in a 3mm × 3mm MLF™ package.

Technical Context

The MIC2211-SGYML-TR integrates two independent LDO regulators sharing a common VIN and GND, each with dedicated enable control (EN1/EN2) and internal reference bypass (CBYP). Regulator 1 delivers up to 150mA at 3.3V with ±1.0% initial accuracy; Regulator 2 delivers up to 300mA at 1.8V with same accuracy and separate load regulation (≤1.0% for LDO1, ≤1.5% for LDO2).

Its µCap architecture eliminates need for large electrolytic capacitors: stability is achieved with 1µF X7R/X5R ceramic output capacitors per channel and a 0.01µF CBYP capacitor, enabling fast turn-on and 60dB PSRR at 1kHz while maintaining ultra-low ground current (24µA per LDO in active mode, 2.0µA in shutdown).

Key Specifications

Pinout & Package

Package: 10-pin 3mm × 3mm MLF™ (exposed pad), RoHS-compliant, moisture-sensitive level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-LDO applications.

Compared with TPS70245PWPR and ADP2118ACPZ-3.318-R7, the MIC2211-SGYML-TR offers the lowest quiescent current (48µA) and smallest footprint (3×3mm MLF™), making it optimal for ultra-portable designs where battery life and board area are constrained - though it lacks power-good and has lower max current than the alternatives.

Availability

MIC2211-SGYML-TR is available at Aetrix Electronics and suitable for cellular handsets, wireless modems, and portable GPS receivers requiring stable component supply with guaranteed long-term availability and full traceability.

Supply support for MIC2211-SGYML-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, power management, and timing solutions before its acquisition by Microchip Technology in 2015.

The MIC2211 product line was designed specifically for compact, battery-powered communication devices requiring dual-rail, low-noise, low-quiescent-current regulation - targeting cellular, PDA, and modem applications with stringent size and efficiency constraints.

FAQ

What are the fixed output voltages of the MIC2211-SGYML-TR?

The MIC2211-SGYML-TR provides fixed output voltages of 3.3V on VOUT1 and 1.8V on VOUT2, as indicated by the "SGY" suffix in the part number per Micrel's voltage code table. These outputs are factory-trimmed and not adjustable; external resistors cannot modify them. The 3.3V rail is rated for 150mA, and the 1.8V rail for 300mA - both with ±1.0% initial accuracy across temperature.

Does the MIC2211-SGYML-TR require external capacitors, and what types are recommended?

Yes, the MIC2211-SGYML-TR requires three external capacitors: a 1µF X7R or X5R ceramic capacitor from each output (VOUT1 and VOUT2) to GND for stability, and a 0.01µF ceramic capacitor from CBYP (Pin 4) to GND to reduce noise and improve PSRR. Aluminum or tantalum capacitors are unnecessary due to the µCap architecture. Z5U/Y5V dielectrics are discouraged due to excessive capacitance drift over temperature.

How does the enable functionality work on the MIC2211-SGYML-TR?

The MIC2211-SGYML-TR features two independent TTL-compatible enable inputs: EN1 (Pin 2) controls VOUT1 (3.3V), and EN2 (Pin 3) controls VOUT2 (1.8V). Both are active-high with logic thresholds of ≥1.8V for enable and ≤0.6V for shutdown. Neither pin may be left floating; they must be driven or pulled to GND/VIN via appropriate logic. When disabled, each LDO draws <2.0µA, enabling zero-off-mode power gating.

What thermal and electrical protections are built into the MIC2211-SGYML-TR?

The MIC2211-SGYML-TR integrates thermal shutdown protection that disables both outputs if junction temperature exceeds +150°C, and current-limit protection with foldback: LDO1 limits at 150–460mA and LDO2 at 300–700mA depending on conditions. It also features internal reverse-current blocking and safe-start circuitry. The MLF™ package has θJA = 60°C/W, requiring adequate PCB copper pour on the exposed pad for sustained 300mA operation at elevated ambient temperatures.

Is the MIC2211-SGYML-TR compatible with modern RoHS and REACH requirements?

Yes, the MIC2211-SGYML-TR is Pb-free and RoHS-compliant, as confirmed by its "-YML" suffix (indicating lead-free, green, halogen-free packaging) and listing in Micrel's October 2005 Pb-FREE column. It meets EU RoHS Directive 2011/65/EU and REACH SVHC requirements. The MLF™ package uses NiPdAu lead finish and conforms to J-STD-020D moisture sensitivity level 3, requiring bake-before-reflow if exposed beyond floor life.