Monolithic Power Systems Inc. MP5418AGQG-P

Overview

MP5418AGQG-P from Monolithic Power Systems is a monolithic negative charge pump IC with integrated adjustable negative linear regulator, delivering dual outputs: unregulated -1×VIN and regulated VOUT2 = -1×VCTL. It operates from 2.3V to 5V input, supports up to 200mA total output current (combined IOUT1 + IOUT2), achieves <1mV VOUT2 ripple at 60mA, and integrates soft-start (5V/ms slew rate) and over-temperature shutdown (160°C). It is used in optical module biasing where precise, low-noise negative rail generation is required.

For engineers reviewing the MP5418AGQG-P datasheet, MP5418AGQG-P pinout, MP5418AGQG-P application, or MP5418AGQG-P equivalent, key selection criteria include its dual-output architecture (charge pump + analog-controlled LDO), QFN-10 package footprint constraints, CTL-based voltage programming interface, absence of inductor requirement, and thermal shutdown hysteresis (30°C).

Technical Context

The MP5418AGQG-P implements a fixed-frequency (455kHz typ.) switched-capacitor charge pump to generate VOUT1 = –VIN without magnetic components, while its negative linear regulator uses internal feedback to force VOUT2 = –VCTL with ±1% accuracy at 25°C. The CTL pin accepts an analog voltage (0–VIN) to set the regulated output continuously between 0V and –VIN.

It features dual protection: cycle-by-cycle charge pump current limiting (1A peak) and thermal shutdown with 30°C hysteresis, plus EN-controlled enable/disable with internal 1MΩ pull-down. Output discharge resistors (RDIS1 = 170–310Ω, RDIS2 = 80–146Ω) ensure safe rail collapse during disable.

Key Specifications

Pinout & Package

MP5418AGQG-P is housed in an ultra-low-profile QFN-10 package (1.4mm × 1.8mm, 0.5mm pitch), optimized for space-constrained portable and optical modules. Exposed thermal pad enhances thermal dissipation (θJC = 30°C/W per JESD51-7).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar negative charge pump + adjustable regulator applications.

Compared with MAX1674AETE+T and LT3467EDD#TRPBF, MP5418AGQG-P uniquely combines charge pump and analog-programmable negative LDO in one QFN-10 package, enabling compact, flexible bias solutions without external resistors or DAC interface complexity.

Availability

MP5418AGQG-P is available at Aetrix Electronics and suitable for optical transceivers, RF power amplifier biasing, and portable sensor signal conditioning requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP5418AGQG-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 power management ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP5418A belongs to MPS's high-efficiency, ultra-compact DC/DC converter product line, engineered specifically for space- and noise-sensitive applications including optical communications, RF infrastructure, and portable instrumentation.

FAQ

What is the function of the TM pin on MP5418AGQG-P?

The TM (Test Mode) pin is reserved for factory testing only. It must be left floating or connected to GND in end-user applications. Connecting TM to any other pin may cause malfunction or damage. No user-accessible functionality is assigned to this terminal.

Can MP5418AGQG-P generate a positive output voltage?

No. MP5418AGQG-P is designed exclusively for negative voltage generation: VOUT1 is always –VIN, and VOUT2 is always between 0V and –VIN. It does not support positive output configurations or buck/boost topologies.

How does the CTL pin determine VOUT2 voltage?

VOUT2 is regulated to exactly –VCTL. For example, applying 1.2V to CTL yields VOUT2 = –1.2V. The CTL pin draws negligible current (<100nA), allowing direct connection to DAC outputs without loading error.

What is the minimum capacitor value required for stable operation?

Four 4.7µF X5R/X7R ceramic capacitors are required: one each for CIN, CFLY, COUT1, and COUT2. Using smaller values degrades load capability, increases ripple, and may cause instability - especially below 2.2µF.

Does MP5418AGQG-P support synchronization to an external clock?

No. The charge pump operates at a fixed internal oscillator frequency (455kHz typ.). There is no external sync input or frequency adjustment capability - timing is fully autonomous and not user-controllable.

What happens to VOUT1 and VOUT2 when EN is pulled low?

When EN is low, both outputs discharge via internal resistors: VOUT1 through RDIS1 (170–310Ω) and VOUT2 through RDIS2 (80–146Ω). This ensures controlled rail collapse within milliseconds, supporting safe power sequencing requirements.

Is MP5418AGQG-P qualified for automotive applications?

No. MP5418AGQG-P is specified for industrial temperature range (–40°C to +125°C) but is not AEC-Q200 qualified. It lacks automotive-specific reliability testing, qualification documentation, and PPAP support.