Monolithic Power Systems Inc. MP5414DV-LF-Z

Overview

MP5414DV-LF-Z from Monolithic Power Systems is a fully-integrated power management unit (PMU) combining a current-mode step-up converter (1.8V–5.5V input, 10V output), four SPDT analog switches (25Ω on-resistance), 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, 70dB PSRR at 1kHz). It targets 3D active shutter glasses requiring synchronized high-voltage bias, battery charging, and precision analog switching.

For engineers reviewing the MP5414DV-LF-Z datasheet, MP5414DV-LF-Z pinout, MP5414DV-LF-Z application, or MP5414DV-LF-Z equivalent, key selection criteria include its integrated 10V boost with output disconnect, quad SPDT switch control logic (S0–S3), programmable charge current via IPGM resistor, LDO output accuracy (±2%), and thermal protection for battery charging in space-constrained wearable electronics.

Technical Context

The MP5414 employs variable-frequency current-mode control for its step-up converter, using internal compensation and soft-start to limit inrush current while optimizing efficiency across 1.8V–5.5V input. Its BSTISET pin sets peak switch current (180mA typical), and BSTFB enables fixed 10V or adjustable output via external resistor divider (1.23V reference).

Charging uses dual-stage CC/CV with trickle mode below 2.6V VBATT, programmable ICHG (50–300mA) via IPGM-to-ground resistor, and open-drain CHGZ status indicator. The LDO features PMOS pass element, 100mV dropout at 100mA, and feed-forward capacitor support on LDOFB for transient response.

Key Specifications

Pinout & Package

MP5414DV-LF-Z is housed in a thermally enhanced 4mm × 5mm 28-pin QFN package with exposed pad connected to ground for optimal thermal dissipation in battery-powered enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PMU applications.

Compared with TPS65217C and MAX77818, MP5414DV-LF-Z uniquely integrates 10V boost with output disconnect, four hardware-controlled SPDTs, and a low-PSRR LDO-making it the only single-package solution for space-constrained 3D shutter systems requiring simultaneous bias, switching, and charging without firmware coordination.

Availability

MP5414DV-LF-Z is available at Aetrix Electronics and suitable for 3D active shutter glasses, portable medical displays, digital camera viewfinders, and wearable AR microdisplay drivers requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for MP5414DV-LF-Z 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 distribution through authorized partners.

The MP5414 belongs to MPS's consumer PMU product line, engineered specifically for ultra-compact, battery-powered optical devices requiring integrated high-voltage bias, analog switching, and smart battery management-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-Z boost converter starts up from as low as 1.8V on BSTIN, verified under no-load and light-load conditions per datasheet Rev.1.12 Section 5. Absolute Maximum Ratings and Electrical Characteristics. This allows direct operation from partially discharged NiMH or Li-ion cells without auxiliary startup circuitry.

How is the battery charge current programmed, and what resistor values correspond to 100mA and 250mA?

Charge current is set by connecting a resistor (RPGM) from IPGM to ground. Per Table 2 in the datasheet, 100mA requires ≈4.01kΩ and 250mA requires ≈1.49kΩ. These values are validated across -40°C to +85°C with ±10% tolerance, and no external sense resistor is needed.

Does the LDO require an external feed-forward capacitor, and what is its impact?

An optional feed-forward capacitor (CBYP) between LDOFB and LDOOUT improves transient response, as confirmed in Section 18 of the datasheet. With CBYP = 0.1μF, load-step recovery time improves by ~40% versus no capacitor, critical for powering burst-mode processors or display drivers without output droop.

Can the SPDT switches operate independently, and what is their maximum continuous current rating?

Yes-S0–S3 control A–D channels independently per Table 1. Each SPDT switch supports 2mA continuous current at 10V BSTOUT, with 25Ω typical on-resistance. This is sufficient for driving LCD shutter control lines but not for high-current display bias; those are handled separately by BSTOUT.

What happens to the boost output when BSTEN is pulled low?

When BSTEN is low, the internal NMOS/PMOS disconnect switch between BSTIN and BSTL opens, isolating all loads-including SPDT switches and LDO-from the input supply. BSTOUT drops to 0V, and quiescent current falls to <1µA, enabling true zero-power standby mode.

Is the CHGZ pin compatible with standard LEDs, and what drive capability does it have?

Yes-CHGZ is an open-drain output rated for 5mA sink current at 0.2V, per Electrical Characteristics table. It can directly drive common red/green LEDs (2mA typical) with a series resistor; no external transistor or pull-up is required for basic charge-status indication.

How does thermal protection interact with the charger and boost converter during sustained high-temperature operation?

At 130°C die temperature, the charger reduces current to maintain thermal equilibrium without shutting down; the boost converter remains fully operational. This is distinct from junction thermal shutdown (150°C), which disables all functions. Both protections are internal and require no external components.