Monolithic Power Systems Inc. MP5610GQG-Z

Overview

MP5610GQG-Z from Monolithic Power Systems is a dual-channel LCD bias power supply IC integrating a 1.2MHz peak-current-mode step-up converter and a negative charge pump, delivering ±5.4V at up to 50mA per rail from a 2.7V–5.5V input. It features 0.5% line/load regulation, 1% voltage tracking between outputs, and internal synchronous rectification for high efficiency in space-constrained displays.

For engineers reviewing the MP5610GQG-Z datasheet, MP5610GQG-Z pinout, MP5610GQG-Z application, or MP5610GQG-Z equivalent, this device is selected for compact LCD bias generation requiring precise dual-rail tracking, low quiescent current (500μA), robust protection (OVP/UVP/OTP/UVLO), and QFN-10 (1.4mm×1.8mm) footprint compatibility.

Technical Context

The MP5610GQG-Z implements a peak-current-mode controlled boost converter for VOP regulation and a charge-pump topology for VON generation, where energy is drawn directly from the SW node-eliminating a separate input path and improving system efficiency. Its voltage tracking is actively maintained via closed-loop adjustment of PMOS M6's on-resistance based on the sum of VOP and VON.

Protection architecture includes cycle-by-cycle current limiting (240–365mA), input DC current limit (200–290mA), output overvoltage thresholds (VOP_OVP = 6.1V, VON_OVP = −6.2V), under-voltage latching (VUVP_P = 52%×VREF, VUVP_N = 60%×VOP), and thermal shutdown at 150°C. Soft-start time is fixed at 270μs with linear reference ramping.

Key Specifications

Pinout & Package

MP5610GQG-Z is housed in a thermally enhanced QFN-10 package (1.4mm × 1.8mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by a dot; top-side marking is "BZ".

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65136RGTR and RT9048AGQW, MP5610GQG-Z delivers superior voltage tracking (±1% vs. ±3–5%), higher output current (50mA vs. 40mA), smaller footprint (1.4mm×1.8mm vs. 3mm×3mm/2mm×2mm), and integrated synchronous rectification-making it optimal for space- and precision-constrained portable LCD systems.

Availability

MP5610GQG-Z is available at Aetrix Electronics and suitable for smartphone LCD bias, feature phone display supply, wearable display modules, and industrial handheld terminals requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MP5610GQG-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 manufacturing partnerships.

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

FAQ

What is the maximum achievable positive output voltage with MP5610GQG-Z?

The MP5610GQG-Z supports programmable positive output voltage up to +5.8V using an external resistor divider on the FBP pin. This is set by the 600mV internal reference and resistor ratio; typical configurations yield +5.4V for standard LCD bias, but scaling beyond that remains within specification limits and validated thermal performance.

How does the MP5610GQG-Z achieve voltage tracking between VOP and VON?

Voltage tracking is achieved through closed-loop control of PMOS M6's on-resistance, which adjusts dynamically based on the sum of VOP and VON. If the sum deviates from zero, the gate driver modifies M6's resistance to drop additional voltage, maintaining |VON|/VOP within ±1%. This is implemented entirely on-die with no external components required.

Can MP5610GQG-Z operate from a 2.7V input while delivering 50mA on both rails?

Yes-MP5610GQG-Z is fully specified down to 2.7V input and delivers up to 50mA per rail across its full input range. At 2.7V, efficiency drops modestly (~78% at full load), but all protections (current limit, thermal, OVP/UVP) remain active and functional per datasheet test conditions.

Is the EN pin internally pulled down, and what is its threshold behavior?

Yes, the EN pin has an internal 1MΩ pull-down resistor to GND. The enable threshold is 1.2V (typical) with hysteresis: rising-edge activation occurs at ~1.2V, and falling-edge disable occurs at ~0.4V. This ensures noise immunity and predictable startup/shutdown sequencing without external components.

What is the recommended flying capacitor value and dielectric type for CP1–CP2?

MPS recommends a 0.47μF X7R ceramic capacitor between CP1 and CP2, rated for ≥10V DC. X7R dielectric ensures stable capacitance across temperature and bias voltage; values from 0.1μF to 1μF are acceptable depending on load transient requirements and EMI targets, per Section 9.3 of the datasheet.

Does MP5610GQG-Z require external compensation components for loop stability?

No-MP5610GQG-Z uses internal compensation optimized for standard 10μH inductors and 2.2μF output capacitors. The control loop is factory-tuned for stability across all operating conditions; no external compensation network is needed or supported in the reference design.

How does the input disconnect MOSFET (M5) function during startup?

M5 is an internal NMOS switch between VIN and VINP. During startup, its gate drive ramps gradually over ~215μs, limiting inrush current into the boost stage. This prevents input voltage sag and ensures synchronized, zero-crossing startup of VOP and VON-critical for LCD panel initialization integrity.