Monolithic Power Systems Inc. MP2662GC-0000-P

Overview

MP2662GC-0000-P from Monolithic Power Systems is a fully autonomous, I²C-programmable single-cell Li-ion/Li-polymer battery charger with integrated power path management, 456mA fast-charge current, ±0.5% battery voltage regulation accuracy, and <1μA battery leakage in shipping mode. It delivers simultaneous system power and battery charging for wearable devices requiring compact, thermally robust power management.

For engineers reviewing the MP2662GC-0000-P datasheet, MP2662GC-0000-P pinout, MP2662GC-0000-P application, or MP2662GC-0000-P equivalent, key selection criteria include programmable input current limit (50–500mA), I²C-configurable battery UVLO (2.4–3.03V), thermal regulation at 120°C, and WLCSP-9 package compatibility with space-constrained PCB layouts.

Technical Context

The MP2662GC-0000-P implements a dual-FET power path architecture: a 290mΩ LDO FET between IN and SYS enables regulated system output (4.2–4.95V), while a 100mΩ battery FET between BATT and SYS decouples charging from system load. This ensures continuous system operation during battery insertion/removal and enables auto-supplement when input power is insufficient.

Its I²C interface (400kHz) controls all critical parameters-including charge current (8–456mA), termination threshold (1–31mA), safety timer, and NTC-based temperature windows-and reports real-time status via the INT pin. The device integrates pre-charge, CC/CV charge, auto-recharge, and thermal limiting without external components beyond ceramic capacitors and an optional NTC thermistor.

Key Specifications

Pinout & Package

MP2662GC-0000-P is housed in a 1.75mm × 1.75mm WLCSP-9 package with bottom-side ball layout. The die is flip-chip mounted; all terminals are solder balls on the underside of the package.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-cell Li-ion charger with power path applications.

Compared with BQ25618RTWR and MAX77751EWJ+, MP2662GC-0000-P offers superior USB-native input optimization (programmable VIN_MIN down to 3.88V), finer-grained I²C control (1mA termination, 120°C thermal regulation), and smallest footprint (1.75mm²), making it optimal for ultra-compact wearables where thermal headroom and shelf-life are critical.

Availability

MP2662GC-0000-P is available at Aetrix Electronics and suitable for wearable fitness trackers, smartwatches, and medical sensor patches requiring stable component supply, long-term lifecycle support, and RoHS-compliant, halogen-free manufacturing.

Supply support for MP2662GC-0000-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-efficiency power management ICs for portable, automotive, and industrial applications. Founded in 1997, MPS emphasizes monolithic integration and thermal robustness.

The MP2662 belongs to MPS's battery management product line, designed specifically for space-constrained, USB-powered consumer electronics requiring autonomous charging, intelligent power path arbitration, and certified safety compliance (IEC 62368-1).

FAQ

What is the minimum input voltage required to initiate charging?

The MP2662GC-0000-P requires VIN ≥ 3.73V (input UVLO threshold) to enable charging. Below this, the IN-to-SYS LDO FET remains off. Programmable VIN_MIN (3.88–5.08V) further restricts operation to maintain sufficient headroom for system regulation-critical when powering loads near battery voltage.

How does the power path manage system load during USB disconnection?

Upon USB removal, the 100mΩ battery FET turns fully on within 10ms, connecting BATT directly to SYS. The system continues uninterrupted because the MP2662 decouples battery charging from system supply-unlike conventional chargers where load current competes with charge current.

Can the battery UVLO threshold be adjusted for different cell chemistries?

Yes. The battery under-voltage lockout threshold is programmable via REG01h bits[2:0], offering three settings: 2.4V (default), 2.76V, and 3.03V. This allows tailoring to LiFePO₄ (2.5V cutoff) or high-voltage Li-ion (3.0V cutoff) without hardware changes.

What is the role of the INT pin during normal operation versus fault conditions?

In normal operation, INT asserts low to signal charge completion or NTC out-of-range events. During faults (OVP, thermal, battery OVP), it pulses low for 100ms. Holding INT low ≥16s enters shipping mode-disconnecting BATT from SYS and reducing leakage to 350nA.

Does the MP2662GC-0000-P support charging from non-USB sources like 9V wall adapters?

Yes. With 21V absolute maximum input rating and integrated OVP, it safely accepts 9V adapters. However, input current must be limited externally (e.g., via upstream DC-DC converter) since the internal IIN_LIM only applies to the IN pin-not the adapter itself.

How is thermal regulation implemented, and what happens when TJ exceeds 120°C?

On-die thermal sensing reduces charge current linearly above 120°C (TJ_REG). If junction temperature reaches 150°C, thermal shutdown disables all FETs until temperature falls by 20°C hysteresis. No external thermal pad or heatsink is required due to WLCSP package efficiency.

Is the 1mA charge termination threshold accurate across temperature and aging?

Yes. The 1mA termination threshold (REG03h bits[3:0]=0000) maintains ±15% accuracy from –40°C to +85°C, verified in production testing. Aging effects are mitigated by auto-recharge triggered at 60–240mV below VBATT_REG, preventing deep discharge-induced capacity loss.