Monolithic Power Systems Inc. MP5610GQG-P

Overview

MP5610GQG-P from Monolithic Power Systems is a dual-channel LCD bias power supply IC integrating a peak-current-mode step-up converter and a negative charge pump. It operates from 2.7V to 5.5V input, delivers ±5.4V outputs at up to 50mA per channel, and features 1.2MHz fixed switching frequency, 0.6V feedback reference with ±1% accuracy, and 1% voltage tracking between positive and negative outputs. It is designed for compact LCD panel bias in portable consumer displays.

For engineers reviewing the MP5610GQG-P datasheet, MP5610GQG-P pinout, MP5610GQG-P application, or MP5610GQG-P equivalent, key selection criteria include dual-rail tracking precision, integrated synchronous rectification, input disconnect MOSFET (RON = 0.1Ω), cycle-by-cycle current limiting (240–365mA), and thermal shutdown at 150°C - all in a QFN-10 (1.4mm × 1.8mm) package.

Technical Context

The MP5610GQG-P implements a two-stage architecture: a peak-current-mode controlled step-up converter regulates VOP using an internal low-side N-MOSFET (RON_M1 = 0.5Ω) and high-side synchronous rectifier (RON_M2 = 2.0Ω), while a charge pump draws energy directly from the SW node to generate VON. Voltage tracking is actively maintained via closed-loop adjustment of PMOS M6's on-resistance (min 1Ω).

Protection logic includes input UVLO (2.45V threshold, 260mV hysteresis), output overvoltage protection (VOVP = 6.1V, VOVN = −6.2V), under-voltage latching (VUVP_P = 52% × VREF, VUVP_N = 60% × VOP), and thermal shutdown at 150°C. Soft-start ramps the internal reference linearly over 270μs to limit inrush and ensure synchronized rail startup.

Key Specifications

Pinout & Package

MP5610GQG-P is housed in a thermally enhanced QFN-10 package (1.4mm × 1.8mm, 0.5mm pitch) with exposed thermal pad. The package supports high-density layout and efficient heat dissipation in ultra-thin portable devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65136RGTR and MAX1719EUT+T, MP5610GQG-P delivers superior voltage tracking (±1% vs. ±2.5%), smaller footprint (QFN-10 vs. QFN-16), and integrated input disconnect - making it optimal for space-constrained, high-fidelity portable LCD bias.

Availability

MP5610GQG-P is available at Aetrix Electronics and suitable for feature phone LCD bias, smartphone secondary display power, portable medical display subsystems, and industrial handheld terminal designs requiring stable component supply and long-term lifecycle support.

Supply support for MP5610GQG-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 MP5610 belongs to MPS's LCD bias power supply product line, engineered specifically for compact, high-efficiency dual-rail generation in battery-powered portable displays - emphasizing tracking accuracy, thermal robustness, and minimal external component count.

FAQ

What is the minimum recommended input voltage for reliable startup?

The MP5610GQG-P incorporates input UVLO with a rising-edge threshold of 2.45V (±0.1V) and 260mV hysteresis. Reliable startup occurs at VIN ≥ 2.45V; operation below this level disables the IC until voltage recovers above 2.19V. This ensures stable bias generation across full battery discharge curves in single-cell Li-ion systems.

Can the MP5610GQG-P generate asymmetric output voltages (e.g., +6.0V/−4.5V)?

No - the MP5610GQG-P is designed for symmetric, tracked dual-rail operation. Its negative charge pump architecture derives VON directly from VOP via internal MOSFET matching, and the voltage tracking loop actively maintains |VON| ≈ VOP within ±1%. Asymmetric configurations require external regulation or a different topology.

How does the input disconnect MOSFET improve system reliability?

The integrated 0.1Ω input disconnect MOSFET (M5) isolates VIN from downstream circuitry during shutdown or fault conditions. It prevents backfeed into the IC, eliminates leakage paths in battery-powered systems, and limits inrush current during startup via controlled ramp-up of its DC current limit - reducing stress on input capacitors and connectors.

What is the role of the VINP and VIN pins, and why are they separate?

VINP supplies only the step-up power stage (low-side MOSFET M1 and high-side rectifier M2), while VIN powers internal logic, gate drivers, and control circuitry. Separation minimizes noise coupling from high-current switching transients into sensitive analog blocks, improving regulation stability and EMI performance without requiring additional ferrite beads or LC filters.

Is external compensation required for the step-up converter feedback loop?

No - the MP5610GQG-P features fully internal compensation for the step-up converter. The error amplifier, PWM comparator, and current-sense amplifier are factory-tuned for stability with standard external components (e.g., 10μH inductor, 2.2μF output capacitors). No external compensation network is needed or supported.

What is the maximum allowable negative output voltage magnitude?

The MP5610GQG-P specifies a negative output overvoltage protection threshold of −6.2V (typical), with hysteresis of 165mV. Exceeding −6.2V triggers shutdown; recovery occurs when VON rises above −6.035V. This limit is enforced by internal sensing and cannot be adjusted externally.

Does the MP5610GQG-P support forced PWM mode or skip-cycle operation?

The MP5610GQG-P operates exclusively in fixed-frequency peak-current-mode PWM. It does not support skip-cycle, burst-mode, or forced PWM modes. Constant 1.2MHz operation ensures predictable EMI profile and eliminates low-frequency ripple that could interfere with display timing or touch sensing.