Microchip Technology MIC5316-GW3YMT-TR

Overview

MIC5316-GW3YMT-TR from Micrel is a dual low-dropout linear regulator IC delivering two independent 300mA outputs (1.8V and 1.6V/1.1V selectable), ultra-low dropout of 85mV at full load, Power-On Reset with adjustable delay, and bias-supplied architecture enabling operation down to 1.7V input. It serves as a power management solution for multi-rail portable SoC subsystems requiring precise voltage sequencing and standby power optimization.

For engineers reviewing the MIC5316-GW3YMT-TR datasheet, MIC5316-GW3YMT-TR pinout, MIC5316-GW3YMT-TR application, or MIC5316-GW3YMT-TR equivalent, key selection criteria include dual LDO output accuracy (±2%), VBIAS-dependent operation, /VSC2-controlled voltage select mode, POR2 open-drain flag timing, and compatibility with 1µF ceramic output capacitors in space-constrained designs.

Technical Context

The MIC5316-GW3YMT-TR integrates two independent CMOS-based LDO regulators sharing a common VBIAS supply (2.5–5.5V) that powers internal reference and control circuitry-decoupling bias current from load current and enabling ultra-low ground current (<46µA). Each LDO features separate VIN inputs (1.7–VBIAS), active-high enable pins (EN1/EN2), and thermal shutdown with current limiting.

LDO2 includes dedicated functional blocks: a /VSC2 input for active-low voltage select (1.6V ↔ 1.1V), a CSET2 pin sourcing 1.4µA to set POR2 delay (1 sec/µF), and an open-drain POR2 output asserting low when VOUT2 falls below 88% of nominal. The device maintains stability with 1µF X5R/X7R ceramic output capacitors and achieves 65dB PSRR at 1kHz.

Key Specifications

Pinout & Package

Package: 12-pin 2.5mm × 2.5mm Thin MLF® (leadless, RoHS-compliant, NiPdAu finish, halogen-free mold compound).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS70245PWPR and ADP2118ACPZ-R7, the MIC5316-GW3YMT-TR uniquely integrates voltage-selectable dual LDOs with POR in a 2.5mm × 2.5mm footprint, enabling compact, low-noise, and dynamically scalable power delivery without external support components.

Availability

MIC5316-GW3YMT-TR is available at Aetrix Electronics and suitable for mobile phone baseband, GPS receiver modules, portable media players, digital camera interfaces, and handheld industrial scanners requiring stable component supply across extended temperature ranges (–40°C to +125°C).

Supply support for MIC5316-GW3YMT-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 MIC5316 product line was designed specifically for battery-powered portable electronics requiring dual, low-quiescent, and dynamically scalable LDO regulation with integrated power sequencing and reset functions.

FAQ

What is the exact output voltage configuration of the MIC5316-GW3YMT-TR?

The MIC5316-GW3YMT-TR delivers a fixed 1.8V output on VOUT1 and a dual-mode output on VOUT2: 1.6V in normal operation and 1.1V when the /VSC2 pin is driven low. This configuration is confirmed by Micrel's ordering information table where "GW3" marking corresponds to 1.8V/1.6V/1.1V. The MIC5316-GW3YMT-TR does not support other voltage combinations.

How does the POR2 function work on the MIC5316-GW3YMT-TR?

POR2 is an open-drain output tied to LDO2 status: it asserts low when VOUT2 drops below 88% of its nominal value and releases high when VOUT2 rises above 98%. Its delay is set by a capacitor on CSET2 (1 sec/µF), and it requires an external pull-up resistor. This behavior is intrinsic to the MIC5316-GW3YMT-TR's internal comparator and is independent of EN2 state once enabled.

Can the MIC5316-GW3YMT-TR operate with only one LDO enabled?

Yes-the MIC5316-GW3YMT-TR supports independent enable control: EN1 controls LDO1 (1.8V) and EN2 controls LDO2 (1.6V/1.1V). When one LDO is disabled, its ground current drops to ≤1µA while the other remains fully operational. This allows partial power gating in systems where only one rail is active during certain modes.

What capacitor values are required for stable operation of the MIC5316-GW3YMT-TR?

The MIC5316-GW3YMT-TR requires a minimum 1µF X5R or X7R ceramic capacitor on each output (VOUT1, VOUT2), a 1µF capacitor on VBIAS, and a 0.01µF capacitor on CBYP for optimal noise performance. Input capacitors (VIN1, VIN2) also require ≥1µF ceramics. Y5V dielectrics are explicitly discouraged due to excessive capacitance loss over temperature.

Is the MIC5316-GW3YMT-TR compatible with lead-free reflow processes?

Yes-the MIC5316-GW3YMT-TR uses Micrel's Thin MLF® package, which is RoHS-compliant and rated for standard lead-free reflow profiles with peak temperatures up to 260°C (3-second duration). The NiPdAu lead finish and halogen-free mold compound meet JEDEC J-STD-020 moisture sensitivity and reflow specifications.