Monolithic Power Systems Inc. MP2615AGQ-P

Overview

MP2615AGQ-P from Monolithic Power Systems is a 2 A, synchronous buck-mode Li-ion/Li-polymer battery charger IC supporting 1- or 2-cell configurations in a 3 mm × 3 mm QFN-16 package. It delivers ±0.75% full-battery voltage accuracy (4.2 V/cell or 4.35 V/cell), programmable charge current via external sense resistor, and integrated high- and low-side MOSFETs with 110 mΩ R_DS(ON). It operates across 4.75–18 V input, features constant-off-time (COT) control up to 99% duty cycle, and is used in portable media players for fast, thermally managed charging.

For engineers reviewing the MP2615AGQ-P datasheet, MP2615AGQ-P pinout, MP2615AGQ-P application, or MP2615AGQ-P equivalent, key selection criteria include cell-count configuration (via CELL pin), terminal voltage selection (SEL pin), NTC-based temperature monitoring, safety timer programming (TMR capacitor), and dual open-drain status outputs (CHGOK/ACOK) for system-level charge state visibility.

Technical Context

The MP2615AGQ-P implements peak-current-mode control with two independent regulation loops: one for precise constant-current (CC) delivery (±5% ICC accuracy at 2 A) and another for constant-voltage (CV) regulation (±0.75% VBATT_FULL). Its COT architecture dynamically reduces switching frequency under high-duty-cycle conditions (e.g., VIN ≈ VBATT) to sustain >95% efficiency while maintaining stable loop response without external compensation.

It integrates internal reverse-blocking protection eliminating external diodes, supports preconditioning of deeply depleted batteries (<2 V), and uses an analog NTC voltage divider (with VCC reference) to monitor battery temperature across –40°C to +85°C ambient, triggering automatic charge suspension outside 0°C–50°C safe range.

Key Specifications

Pinout & Package

MP2615AGQ-P is housed in a thermally enhanced 3 mm × 3 mm QFN-16 package with exposed thermal pad (PGND-connected), optimized for compact portable designs requiring high power density and efficient heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Li-ion battery charging applications.

Compared with BQ24195RGER and ISL9238HRZ-T, MP2615AGQ-P offers hardware-configurable cell count and voltage without communication bus overhead, superior thermal performance in QFN-16, and autonomous NTC monitoring-making it optimal for cost-sensitive, space-constrained, and firmware-light portable designs.

Availability

MP2615AGQ-P is available at Aetrix Electronics and suitable for smartphones, portable media players, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2615AGQ-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 control.

The MP2615AGQ-P belongs to MPS's battery charger IC product line, designed specifically for compact, high-efficiency charging in consumer and industrial portable electronics where integration, thermal robustness, and autonomous safety are critical.

FAQ

What is the minimum input voltage required to initiate charging?

The MP2615AGQ-P has an under-voltage lockout (UVLO) threshold of 3.75 V (typical), with 225 mV hysteresis. Charging begins only when VIN rises above 3.95 V (rising threshold), ensuring stable operation before enabling the power stage. Below this, EN remains inactive and all internal regulators are disabled.

How does the MP2615AGQ-P handle battery short-circuit detection?

When VBATT drops below 2 V, the device detects a battery short and reduces the peak current limit to 2.2 A while folding back switching frequency to 160 kHz. This limits fault energy and thermal stress without latching off, allowing recovery once the short is removed and VBATT rises above 2.2 V.

Can the safety timer be disabled, and how?

Yes-the safety timer is fully disableable by connecting the TMR pin directly to AGND. This removes all time-based charge termination, leaving only voltage- and current-based end-of-charge conditions (IBF threshold and VBATT_FULL regulation) active.

What is the purpose of the VCC pin, and can it power external circuitry?

VCC is a dedicated 4.5 V internal regulator output used solely for gate driving and internal analog biasing. It is not rated for external loading: connecting any external load will disrupt gate drive stability and may cause erratic switching or thermal runaway. A 1 µF ceramic capacitor to AGND is mandatory.

How does the MP2615AGQ-P achieve 99% duty cycle operation?

Using constant-off-time (COT) control, the MP2615AGQ-P maintains a fixed 200 ns minimum off-time while reducing switching frequency as VIN approaches VBATT. This extends on-time proportionally, achieving up to 99% duty cycle without compromising loop stability or requiring external compensation components.

Is the MP2615AGQ-P compatible with both Li-ion and Li-polymer batteries?

Yes-the MP2615AGQ-P supports both chemistries equally. Its programmable full-charge voltage (4.2 V/cell or 4.35 V/cell), ±0.75% accuracy, and auto-recharge threshold (150 mV hysteresis) align with standard Li-ion and high-energy-density Li-polymer specifications per JEITA guidelines.

What is the recommended PCB layout practice for thermal management?

Maximize copper area connected to the exposed thermal pad (Pin 16, PGND) using ≥4 thermal vias (0.3 mm diameter) to inner-layer ground planes. Separate AGND and PGND traces, joining them at a single point near the IC. Place input/output capacitors and inductor within 5 mm of respective pins to minimize parasitic inductance.