Microchip Technology MIC5380-NGYFT-TR

Overview

MIC5380-NGYFT-TR from Micrel is a dual low-dropout linear regulator IC delivering two independent 150mA outputs at fixed 2.85V and 1.8V, housed in a 6-pin 1mm × 1mm Thin MLF® package. It features ±1% typical output accuracy, 155mV dropout at full load, and 32µA quiescent current per LDO-optimized for space-constrained, battery-powered portable electronics such as camera DSP power supplies.

For engineers reviewing the MIC5380-NGYFT-TR datasheet, MIC5380-NGYFT-TR pinout, MIC5380-NGYFT-TR application, or MIC5380-NGYFT-TR equivalent, key selection considerations include dual-output voltage pairing, ultra-small footprint compatibility with 0402 ceramic capacitors, zero-off-mode shutdown behavior, and thermal performance under 150°C junction limit in high-density PCB layouts.

Technical Context

The MIC5380-NGYFT-TR integrates two CMOS-based LDO regulators sharing a common input (VIN) and ground (GND), each controlled by dedicated active-high enable pins (EN1/EN2). Its architecture supports independent regulation without cross-coupling, enabling asymmetric voltage sequencing in multi-rail systems.

It operates across 2.5V–5.5V input range, maintains stability with only 1µF ceramic output capacitors per rail, and achieves 60dB PSRR at 1kHz. Unlike the MIC5381 variant, it lacks auto-discharge circuitry-output capacitors remain floating when disabled.

Key Specifications

Pinout & Package

Package: 6-pin 1mm × 1mm Thin MLF® (RoHS-compliant, NiPdAu lead finish, halogen-free mold compound). Pin 1 identified by ▲ mark on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MIC5381-MGYFT, MIC5380-NGYFT-TR omits auto-discharge but matches all regulation specs and saves cost in non-discharge-critical designs; versus TPL7407LPGEDR, it delivers identical dual-rail performance in 64% less area and 51% lower quiescent current per rail.

Availability

MIC5380-NGYFT-TR is available at Aetrix Electronics and suitable for camera DSP power supplies, Bluetooth headset audio cores, medical handheld sensor interfaces, USB thumb drive controllers, and portable GPS receivers requiring stable component supply with guaranteed long-term sourcing.

Supply support for MIC5380-NGYFT-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 mixed-signal ICs, acquired by Microchip Technology in 2015. Known for precision power management and timing solutions.

The MIC5380/1 family was designed specifically for ultra-compact, battery-powered portable electronics demanding dual-rail LDOs with minimal footprint, low IQ, and robust thermal performance-targeting camera modules, wearables, and handheld medical devices.

FAQ

What are the fixed output voltages of the MIC5380-NGYFT-TR?

The MIC5380-NGYFT-TR provides two fixed output voltages: 2.85V on VOUT1 (Pin 1) and 1.8V on VOUT2 (Pin 2). These values are factory-trimmed and non-adjustable. The marking code "NG" on the package confirms this specific voltage combination, as documented in Micrel's ordering information table. No external resistors or feedback networks are required or supported.

Does the MIC5380-NGYFT-TR include auto-discharge functionality?

No, the MIC5380-NGYFT-TR does not include auto-discharge circuitry. That feature is exclusive to the MIC5381 variant (e.g., MIC5381-MGYFT). When EN1 or EN2 is driven low, the corresponding LDO output goes inactive but leaves its output capacitor charged-requiring external discharge paths if rapid voltage decay is needed. This distinction is clearly stated in the block diagram and functional characteristics sections of the MIC5380/1 datasheet.

What is the minimum input voltage required for the MIC5380-NGYFT-TR to regulate both outputs?

The MIC5380-NGYFT-TR requires VIN ≥ (VOUT + dropout) for each rail. At 150mA load, dropout is 155mV-so minimum VIN is 2.85V + 0.155V = 3.005V for VOUT1 and 1.8V + 0.155V = 1.955V for VOUT2. Since both rails share VIN, the higher threshold governs: 3.005V minimum. Below this, VOUT1 drops out of regulation while VOUT2 may remain stable until VIN falls below ~1.96V.

Can the MIC5380-NGYFT-TR operate without load on either output?

Yes, the MIC5380-NGYFT-TR remains stable and in regulation with zero load on either or both outputs. This "no-load stability" is explicitly confirmed in the Application Information section and distinguishes it from many legacy LDOs that require minimum load resistors. It enables use in CMOS RAM keep-alive circuits and always-on sensor bias rails where current draw may drop to nanoamps.

What ceramic capacitor dielectric types are recommended for the MIC5380-NGYFT-TR outputs?

X5R and X7R dielectric ceramic capacitors are recommended for both input and output of the MIC5380-NGYFT-TR. These offer stable capacitance over temperature (±15% for X7R, ±22% for X5R), unlike Y5V (−50% to +60%) which risks instability. The datasheet validates stability with 1µF 0402 X5R/X7R parts-Murata GRM155R61A105KE19D and TDK C3216X5R1A105K are qualified examples.