Microchip Technology MIC2214-AAYML-TR

Overview

MIC2214-AAYML-TR from Micrel is an adjustable dual µCap low-dropout regulator IC with integrated open-drain LED driver and power-on reset (POR) circuit. It delivers 150mA from LDO1 and 300mA from LDO2, features 80mV dropout at 100mA, 48µA total ground current, and ±1.0% initial output accuracy - designed for compact battery-powered handheld devices requiring independent voltage rails and keypad backlight control.

For engineers reviewing the MIC2214-AAYML-TR datasheet, MIC2214-AAYML-TR pinout, MIC2214-AAYML-TR application, or MIC2214-AAYML-TR equivalent, this page provides verified functional identity, confirmed 16-pin 4×4 mm MLF™ package mapping, validated pin roles including ADJ1/ADJ2 for dual adjustable outputs, POR delay programmability via SET pin, and real-world design meaning of ultra-low quiescent current in always-on subsystems.

Technical Context

The MIC2214-AAYML-TR implements two independent µCap LDO regulators sharing a common input (VIN), each with dedicated enable (EN1/EN2) and feedback (ADJ1/ADJ2) inputs. LDO2 integrates a POR circuit whose delay is set by a capacitor on the SET pin charging a 1.25V threshold via a 1.0µA current source.

LDO1 and LDO2 support output voltages from 1.25V to 5.5V using external resistor dividers; the open-drain DRV output sinks up to 150mA and is controlled by the active-high SW input, while NGND provides isolated grounding for the driver stage.

Key Specifications

Pinout & Package

Package: 16-pin 4mm × 4mm 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-with-POR applications.

Compared with TPS70245PWP and MAX1586BETL+, the MIC2214-AAYML-TR uniquely combines dual adjustable LDOs, programmable POR delay, and 48µA quiescent current in a 4×4 mm MLF™ - making it optimal for space-constrained, battery-sensitive designs requiring flexible voltage and precise sequencing.

Availability

MIC2214-AAYML-TR is available at Aetrix Electronics and suitable for cellular handsets, wireless modems, and PDAs requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for MIC2214-AAYML-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 MIC2214 product line was engineered for portable power management in space- and power-constrained wireless devices, emphasizing ultra-low quiescent current, µCap capacitor compatibility, and integrated sequencing functions.

FAQ

What output voltage range does the MIC2214-AAYML-TR support?

The MIC2214-AAYML-TR supports fully adjustable outputs from 1.25V to 5.5V on both LDO1 and LDO2 using external resistor dividers connected to ADJ1 and ADJ2 pins. This range covers standard logic I/O voltages (1.8V, 2.8V, 3.3V) and core rails (1.2V, 1.5V) without requiring custom fixed-voltage variants. The MIC2214-AAYML-TR achieves this with ±1.0% initial accuracy and ±2.0% over temperature, ensuring robust operation across industrial temperature ranges.

How is the power-on reset (POR) delay programmed on the MIC2214-AAYML-TR?

The POR delay on the MIC2214-AAYML-TR is set by connecting a capacitor from the SET pin to ground. A built-in 1.0µA current source charges this capacitor until it reaches 1.25V, at which point the POR output is released. For example, a 100nF capacitor yields ~125ms delay (t = 1.25V / 1µA × 100nF). The MIC2214-AAYML-TR datasheet confirms this linear relationship and specifies maximum delay >1 second with practical capacitor values.

Can the MIC2214-AAYML-TR drive LEDs directly, and what are the limits?

Yes, the MIC2214-AAYML-TR integrates a 150mA open-drain driver (DRV pin) controlled by the active-high SW input. It can directly sink up to 150mA with a typical VOL of 0.5V at full load, enabling efficient keypad or status LED driving without external FETs. The MIC2214-AAYML-TR requires an external pull-up (to VIN or VOUT2) and NGND connection to system ground. Thermal derating applies above 85°C ambient.

What is the minimum required output capacitance for stability on the MIC2214-AAYML-TR?

The MIC2214-AAYML-TR requires a minimum 1µF X7R or X5R ceramic capacitor on each output (VOUT1 and VOUT2) for guaranteed stability. These capacitors must be placed close to the device pins. The MIC2214-AAYML-TR's µCap architecture eliminates need for large ESR electrolytics; increasing capacitance beyond 1µF improves transient response but does not affect basic stability. Y5V/Z5U dielectrics are discouraged due to >50% capacitance drift over temperature.

Does the MIC2214-AAYML-TR support independent enable control for each LDO?

Yes, the MIC2214-AAYML-TR provides separate EN1 and EN2 pins for independent control of LDO1 and LDO2. Each is a CMOS-compatible active-high input with 1.8V logic threshold and <1µA input current. This allows precise power sequencing - for example, enabling analog rail first, then digital rail after POR assertion. The MIC2214-AAYML-TR also supports simultaneous enable via shared logic if required, but independent control is electrically supported and documented in the functional diagram.