Microchip Technology MIC5356-SGYMME

Overview

MIC5356-SGYMME from Micrel is a dual-channel, micropower, low-dropout linear regulator delivering two independently enabled 500mA outputs at fixed 3.3V and 1.8V. It operates from 2.5V to 5.5V input, achieves 2% output accuracy, maintains stability with only 2.2µF ceramic capacitors, and features active output discharge (30Ω) on disable-ideal for battery-powered portable electronics requiring fast transient response and ultra-low quiescent current.

For engineers reviewing the MIC5356-SGYMME datasheet, MIC5356-SGYMME pinout, MIC5356-SGYMME application, or MIC5356-SGYMME equivalent, key selection criteria include dual-output LDO independence, µCap compatibility, thermal performance in 8-pin ePad MSOP, and auto-discharge behavior critical for system power sequencing and rail collapse timing.

Technical Context

The MIC5356-SGYMME integrates two high-performance LDOs with separate CMOS enable inputs (EN1/EN2), enabling independent control of each 500mA output. Its architecture supports simultaneous or staggered enable/disable sequences without cross-regulator interference.

It employs a proprietary µCap-stable control loop optimized for low-ESR ceramic capacitors, achieving <125µs turn-on time and excellent load transient response (<10mV deviation at 500mA step). The integrated 30Ω auto-discharge NFET activates only when both enables are low, ensuring controlled VOUT1/VOUT2 ramp-down without external circuitry.

Key Specifications

Pinout & Package

Package: 8-pin ePad MSOP (MME), thermally enhanced with exposed heatsink pad (HSPAD) requiring connection to ground plane via thermal vias for optimal θJA = 64.4°C/W performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MIC5356-SGYMME, the XC6216D331MR-G and RT9013-33PL lack integrated dual-output architecture and auto-discharge-requiring additional components and PCB area to achieve equivalent functionality, increasing BOM cost and design complexity.

Availability

MIC5356-SGYMME is available at Aetrix Electronics and suitable for smartphone power management, GPS receiver modules, and notebook embedded controller subsystems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MIC5356-SGYMME 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 MIC5355/6 family was designed specifically for space-constrained, battery-operated portable electronics needing dual, independent, micropower LDOs with fast transient response and integrated discharge-targeting smartphone, GPS, and digital camera markets.

FAQ

What is the output voltage configuration of the MIC5356-SGYMME?

The MIC5356-SGYMME provides fixed dual outputs: 3.3V on VOUT1 and 1.8V on VOUT2. These values are factory-trimmed and non-adjustable, with ±2% initial accuracy over temperature and load. This configuration is confirmed in the Ordering Information table and General Description section of the official Micrel datasheet (M9999-031512-A), and applies specifically to the MIC5356-SGYMME variant-not the MIC5355 series or other MIC5356 suffixes.

Does the MIC5356-SGYMME support independent enable control for each output?

Yes, the MIC5356-SGYMME features two independent active-high enable inputs: EN1 controls the 3.3V output (VOUT1) and EN2 controls the 1.8V output (VOUT2). Each pin must be driven to a defined logic level-floating is prohibited. This allows precise power sequencing, such as enabling the 3.3V rail before the 1.8V rail, which is essential for FPGA and processor boot integrity. The Pin Description table explicitly assigns these functions to pins 5 and 4 respectively.

What is the purpose and behavior of the auto-discharge feature in the MIC5356-SGYMME?

The MIC5356-SGYMME incorporates an auto-discharge circuit that activates a 30Ω internal NFET between each output and ground when its respective enable pin is driven low. This discharges external output capacitors rapidly-enabling controlled rail collapse during shutdown. The feature is exclusive to MIC5356 variants (not MIC5355) and is documented in the Features list, Electrical Characteristics table (Auto-Discharge NFET Resistance), and Application Information section of the datasheet.

What package type and thermal characteristics apply to the MIC5356-SGYMME?

The MIC5356-SGYMME uses the 8-pin ePad MSOP (MME) package with an exposed heatsink pad (HSPAD). Its junction-to-ambient thermal resistance (θJA) is 64.4°C/W when properly mounted with thermal vias to a ground plane. This package is distinct from the MLF® variant (e.g., MIC5356-MMYML) and is specified in the Ordering Information table for MIC5356-SGYMME. Thermal performance depends on PCB layout per the Package Information section (pages 16–17).

Can the MIC5356-SGYMME operate stably with only 2.2µF ceramic output capacitors?

Yes, the MIC5356-SGYMME is specifically optimized for µCap stability with a minimum 2.2µF X5R or X7R ceramic capacitor on each output. This is stated in the General Description, Features list, and Electrical Characteristics test conditions. Using Y5V or Z5U dielectrics is discouraged due to capacitance loss over temperature; X7R is preferred for ±15% variation across –40°C to +125°C. Stability is guaranteed under these conditions without requiring larger or higher-ESR capacitors.