Monolithic Power Systems Inc. MP2690GR-Z

Overview

MP2690GR-Z from Monolithic Power Systems is a highly integrated, switch-mode battery charger and boost converter IC for single-cell Li-ion/Li-polymer power banks. It delivers up to 2.5A charge current and 2.1A boost output, integrates IN-to-SYS pass-through with OVP/OCP, supports 4.2V/4.35V/4.45V programmable charge voltage (±0.5%), and includes 4-LED fuel gauge and torch-light control - enabling full system power management without an external microcontroller.

For engineers reviewing the MP2690GR-Z datasheet, MP2690GR-Z pinout, MP2690GR-Z application, or MP2690GR-Z equivalent, key selection considerations include dual-mode operation (charge/boost), input voltage regulation (4.65–6V), thermal regulation with 120°C foldback and 150°C shutdown, USB BC1.2 port detection (DP1/DM1), and output signaling (DP2/DM2) for DCP/SDP compatibility in portable power applications.

Technical Context

The MP2690GR-Z implements a dual-path power architecture: an IN-to-SYS pass-through path with priority over charging, and a synchronous buck-boost converter for reverse power delivery. Its five-loop control system simultaneously regulates input current (via ILIM), input voltage (VREG = 4.65V), battery charge current (via ISET), battery voltage (VBATT_FULL), and junction temperature (TJ).

In charge mode, it executes automatic three-phase charging (trickle → constant current → constant voltage) with auto-recharge and termination at 10% of ICC. In boost mode, it uses PB-triggered enablement, OLIM-programmed current limit, light-load auto-shutdown (16s timeout), and SCP/OVP on SYS - all coordinated by internal state-machine logic without firmware dependency.

Key Specifications

Pinout & Package

MP2690GR-Z is housed in a thermally enhanced 26-pin QFN package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad (PGND-connected). The package supports high-current routing (VIN, SW, SYS, BATT) and mixed-signal isolation (AGND/VNTC/NTC) for precision battery monitoring.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar all-in-one battery charger/boost converter applications.

Compared with BQ25895RTWR and IP2326, MP2690GR-Z uniquely combines programmable CV (4.2/4.35/4.45V), integrated BC1.2 signaling, torch control, and thermal foldback - making it optimal for feature-rich, safety-critical power banks targeting diverse Li-ion chemistries and USB ecosystem compatibility.

Availability

MP2690GR-Z is available at Aetrix Electronics and suitable for power bank systems, USB-C portable chargers, smartphone backup batteries, and tablet external power packs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP2690GR-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 MP2690 belongs to MPS's Power Bank & Portable Charger IC product line, engineered specifically to consolidate charging, boosting, USB detection/signaling, and fuel gauging into a single chip for compact, firmware-free portable power solutions.

FAQ

What battery chemistries does MP2690GR-Z support?

The MP2690GR-Z supports single-cell Li-ion and Li-polymer batteries exclusively. Its programmable charge voltage (4.2V, 4.35V, or 4.45V) accommodates common variants including standard, high-voltage, and cobalt-free chemistries - all with ±0.5% accuracy and JEITA-compliant thermal foldback.

How does the IN-to-SYS pass-through path prioritize system power over charging?

The IN-to-SYS path uses a dedicated 65mΩ NMOS with built-in OVP (6.0V) and OCP (5A) that activates whenever VIN exceeds VBATT + 300mV. This path operates independently of the charging circuit and takes precedence - powering SYS directly from the adapter even while charging the battery concurrently.

Can MP2690GR-Z operate without an external microcontroller?

Yes. The MP2690GR-Z is designed for firmware-free operation: PB pin handles boost enable/torch control, VB pin selects charge voltage, and LED1–LED4 provide direct fuel gauge output. All USB detection (DP1/DM1) and signaling (DP2/DM2) are fully integrated - eliminating MCU dependency in basic power bank designs.

What protections are active during boost mode?

In boost mode, MP2690GR-Z provides output over-voltage protection (VSYS_OVP = 5.8V), short-circuit protection (SCP) that disconnects battery from SYS, light-load auto-shutdown (after 16s), weak-battery UVLO (2.6V), and thermal shutdown (150°C). All protections trigger immediate fault recovery upon condition removal.

How is USB BC1.2 DCP detection implemented on DP1/DM1?

MP2690GR-Z applies a 0.6V internal voltage source to DP1 and sinks 7–13μA from DM1. When a DCP is detected (DP1/DM1 shorted), the resulting current flow triggers internal logic. No external resistors or comparators are needed - the detection complies fully with USB BC1.2 Rev 1.2 specification.

What is the minimum recommended input capacitance for stable operation?

A minimum 22µF ceramic capacitor is required between VIN and PGND, placed as close as possible to pins 5 and 1. Total input capacitance should not fall below 44µF to suppress high-frequency switching noise and ensure reliable OVP/OCP response during transient load steps.

Does MP2690GR-Z support battery temperature monitoring?

Yes. Pin 19 (NTC) accepts a negative temperature coefficient thermistor divider, referenced to VNTC (pin 18). The IC monitors resistance ratios to detect low-temp (0°C threshold: 66.2% of R25) and high-temp (50°C threshold: 35.7% of R25) conditions - triggering charge suspension if thresholds are exceeded.