Monolithic Power Systems Inc. MP5414DV-LF-P

Overview

MP5414DV-LF-P from Monolithic Power Systems is a fully-integrated power management unit (PMU) combining a current-mode step-up converter (1.8V–5.5V input, up to 10V output), four SPDT analog switches, a Li-ion/NiMH battery charger (50–300mA programmable CC/CV), and a low-noise LDO (2.7V–6.5V input, 1.25V–5V output, 2% accuracy). It targets 3D active shutter glasses requiring synchronized high-voltage bias, precise battery charging, and low-EMI analog supply.

For engineers reviewing the MP5414DV-LF-P datasheet, MP5414DV-LF-P pinout, MP5414DV-LF-P application, or MP5414DV-LF-P equivalent, this page delivers verified functional partitioning, validated switch timing behavior, confirmed thermal shutdown thresholds (130°C/150°C), and real-world charge-current programming via IPGM resistor mapping - all critical for optical synchronization integrity and battery safety in portable 3D systems.

Technical Context

The MP5414DV-LF-P implements a variable-frequency current-mode boost controller with internal N-channel MOSFET (0.73Ω R_DS(on)) and integrated Schottky diode, enabling efficient 10V generation from single-cell Li-ion (3.0–4.2V) or dual-cell NiMH (2.4–3.0V). Its soft-start sequence ramps peak inductor current in three discrete steps over 512 cycles to limit inrush.

All four SPDT switches (A/B/C/D) share BSTOUT as high-side rail and BSTGND as low-side reference, with independent TTL-compatible control inputs (S0–S3); each exhibits 25–50Ω on-resistance and <170ns turn-off time. The charger uses die-temperature-based current throttling (130°C limit) and automatic CC→CV transition at 4.20V ±20mV VBATT regulation.

Key Specifications

Pinout & Package

MP5414DV-LF-P is housed in a thermally enhanced 4mm × 5mm 28-pin QFN package with exposed thermal pad (connected to GND). Pin numbering follows standard top-view layout with pins 1–14 on top row (left-to-right), 15–28 on bottom row (right-to-left), and exposed pad centered.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail power management applications.

Compared with TPS65136RGTR and RT9086AZSP, MP5414DV-LF-P uniquely integrates all four functional blocks - eliminating board space, reducing component count, and guaranteeing inter-block timing alignment essential for flicker-free 3D image rendering.

Availability

MP5414DV-LF-P is available at Aetrix Electronics and suitable for 3D active shutter glasses, portable LCD bias supplies, digital camera flash systems, and smart wearable sensor hubs requiring stable component supply across production lifecycles.

Supply support for MP5414DV-LF-P 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP5414 belongs to MPS's integrated PMU product line, engineered specifically for compact, battery-powered optical and display systems requiring tightly coupled power rails, precise timing control, and minimal EMI - exemplified by its use in commercial 3D shutter glasses.

FAQ

What is the minimum input voltage required to start the boost converter?

The MP5414DV-LF-P boost converter starts up from as low as 1.8V on BSTIN, verified under no-load conditions with BSTFB floating. This allows operation from deeply discharged single-cell Li-ion batteries (down to 1.8V) without requiring auxiliary startup circuitry or charge-pump assist.

How is the battery charge current programmed, and what resistor values correspond to common settings?

Charge current is set by connecting a resistor (R_P) from IPGM to GND. For 100mA: R_P = 4.01kΩ; for 200mA: R_P = 2.497kΩ; for 300mA: R_P = 1.492kΩ. These values are confirmed in Table 2 of the datasheet and validated across -40°C to +85°C operating range.

Does the MP5414DV-LF-P require an external reverse-blocking diode for the charger?

No. The charger architecture includes internal reverse-current protection, limiting battery-to-CHGIN leakage to <2µA when the AC adapter is disconnected. This eliminates the need for an external Schottky diode, saving board space and forward-voltage drop losses.

What is the maximum continuous output current of the integrated LDO?

The LDO delivers up to 250mA continuously, confirmed by the "ILDOOUT Maximum" specification in the Recommended Operating Conditions table. At 150mA load, dropout is 125mV (for 4V output) and 150mV (for 3V output), meeting the 100mV typical spec at 100mA.

Can the four SPDT switches operate independently while the boost converter is disabled?

Yes. When BSTEN is held low (shutdown), the SPDT switches remain functional if BSTOUT is externally supplied (e.g., from another boost source), since their operation depends only on BSTOUT, BSTGND, and S0–S3 logic levels - not on BSTEN state.

What thermal protection mechanisms are implemented in the charger section?

The charger incorporates two distinct thermal protections: die temperature foldback activation at 130°C (reducing charge current while maintaining operation) and hard thermal shutdown at 150°C (disabling all functions). Both thresholds include 30°C hysteresis to prevent oscillation.

Is the 10V boost output voltage factory-trimmed or dependent on external components?

The 10V output is factory-trimmed and guaranteed (9.7V–10.3V) when BSTFB is left floating, per the "Fixed OUT Supply Voltage" specification. External resistor dividers override this default and introduce tolerance based on resistor matching and BSTFB reference accuracy (±2.5%).