Monolithic Power Systems Inc. MPQ5480GC-P

Overview

MPQ5480GC-P from Monolithic Power Systems is a monolithic power management IC for wearable devices, integrating a USB-compatible CC/CV lithium-ion battery charger (4V–6V input), a synchronous buck DC/DC regulator (1.22V default output, 100mA max), cell UVLO protection (3.05V threshold), push-button debouncer, and a dedicated system extension switch (Vo2). It operates in shutdown, charging, and normal ON/OFF modes.

For engineers reviewing the MPQ5480GC-P datasheet, MPQ5480GC-P pinout, MPQ5480GC-P application, or MPQ5480GC-P equivalent, this device supports low-power wearable power sequencing, battery charge termination at 4.10V ±0.5%, peak current programmability via IPK pin (50–200mA), thermal charge enable/disable (6°C–49°C), and Vo2 overcurrent protection with 9ms detection delay.

Technical Context

The MPQ5480GC-P implements a hysteresis-controlled synchronous buck converter with DCM/CCM hybrid operation: zero-current detection enables light-load efficiency, while current-limit comparator and min-on-time (80ns) ensure fast transient response to 45mA/5ms load steps. The integrated charger uses analog CC/CV control with trickle-charge entry at 2.93V and automatic termination at 10% ICHG or 3.6h timeout.

Its dual-ground architecture separates PGND (power-switch return) from AGND (analog reference), and the EOL pin employs an external 0.1µF capacitor to generate a 1ms-filtered VBATT average for precise 3.05V UVLO latching. The Vo2 switch integrates NFET with 1100mΩ R_DS(ON), overcurrent threshold scaling linearly with programmed I_CHG (e.g., 3.8×ICHG), and auto-retry after 75ms short-circuit disable.

Key Specifications

Pinout & Package

MPQ5480GC-P is housed in a WLCSP-16 package (1.7mm × 1.7mm), optimized for space-constrained wearable PCBs. The die is flip-chip mounted with solder balls on bottom; top-side markings identify pin 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated charger + buck regulator applications.

Compared with BQ24075RGTR and TPS62745DSSR, MPQ5480GC-P uniquely consolidates charger, buck regulator, Vo2 switch, push-button controller, and battery safety logic into one WLCSP-16 package - reducing total solution size by ≥40% and eliminating inter-IC timing coordination.

Availability

MPQ5480GC-P is available at Aetrix Electronics and suitable for wearable device design, battery-powered portable instrumentation, and medical patch monitors requiring stable component supply and end-of-life transparency.

Supply support for MPQ5480GC-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 core expertise in DC/DC conversion, battery management, and motor drivers.

The MPQ5480 product line targets ultra-compact, battery-constrained applications such as wearables and medical patches, delivering integrated power management with minimal external components and robust safety features.

FAQ

What is the functional status of MPQ5480GC-P?

MPQ5480GC-P is marked End-of-Life (EOL) by Monolithic Power Systems as of Rev. 1.0 (March 2016). No new production is scheduled, but Aetrix Electronics maintains legacy inventory with full traceability and documentation for ongoing production support.

Can MPQ5480GC-P regulate output voltages above 1.22V?

Yes. VOUT is programmable above 1.22V using an external resistor divider from VOUT to FB (internal 900kΩ divider). The equation is V_OUT = 1.22V × (1 + R_UP/(R_DOWN // 900kΩ)), supporting outputs up to ~5V depending on resistor tolerance and load regulation.

How does the Vo2 switch behave during charging?

Vo2 is automatically disabled whenever VCH > 3.8V (charger present), regardless of EN/PB state. This isolates secondary loads from the battery during charge to prevent interference with CC/CV regulation and ensure accurate charge termination.

What happens if the battery voltage drops below UVLO during operation?

If filtered VBATT falls below 3.05V, the MPQ5480GC-P enters latched shutdown: VOUT and Vo2 turn off, EN/PB becomes inactive, and only 200–350nA leakage current flows from BATT. Recovery requires reconnecting a valid charger (VCH > 3.8V).

Is the IPK pin compatible with zero-ohm programming?

Yes. An internal 2kΩ resistor is series-connected to IPK, limiting peak current even if RIPK = 0Ω. With RIPK = 0, IPK sets ~200mA (per datasheet Table 2), ensuring safe operation without risk of unbounded inductor current.

Does MPQ5480GC-P support USB-IF compliance?

No. While it accepts 4–6V USB input and implements USB-compatible CC/CV charging, MPQ5480GC-P lacks USB-IF certification, BC1.2 enumeration, or D+/D− detection. It assumes host-provided 5V without negotiation.

What is the maximum supported output capacitance for VOUT?

The DC/DC regulator supports up to 250µF output capacitance. Larger values may extend soft-start time beyond 0.3ms and require verification of startup behavior under worst-case load conditions.