MP2637AGR-P - 2.5A Single-Cell Li-ion Charger IC | MPS
MPN: MP2637AGR-P β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MP2637AGR-P Overview
A switch-mode battery charger is a power-management IC that regulates charging current and voltage using a high-efficiency switching topology rather than a linear pass element. Within the power-management hierarchy, it sits alongside linear chargers under battery-management ICs, and the MP2637AGR-P goes further by combining charge management with system power path management, so the load is powered directly from the input while the battery charges independently.
Key features include up to 2.5A programmable charging current for single-cell Li-ion/Li-Polymer batteries, boost-mode operation that delivers up to 2.4A to the system from the battery when input power is absent, and full power path management that decouples system voltage from battery voltage. This allows instant power-on even with a deeply discharged battery.
Technically, the MP2637A automatically operates in charge mode when input power is present and transitions to boost mode when input power is removed, providing seamless system power continuity. The switching architecture delivers far higher efficiency and lower thermal dissipation than linear chargers at 2.5A charge currents, enabling compact thermally-constrained designs. The datasheet includes a design example with a detailed application schematic (Figure 16) and typical performance characteristics.
Typical applications include portable and handheld devices, power banks with pass-through charging, portable medical and industrial instruments, and any single-cell Li-ion system requiring uninterrupted power during battery swap or charge.
Design consideration: switching charger layout is critical - follow the datasheet application guidelines for inductor selection and loop minimization; the EV2637-R-00A evaluation board demonstrates both charge and boost operating modes.
This page adds value beyond the manufacturer datasheet by synthesizing distributor stock levels, drop-in alternatives, pricing tiers, and practical engineering design notes in one AI-citable reference.
Drop-in alternatives for MP2637AGR-P β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
MP2637GR-Z
β Drop-Inπ Reference alternative (not in catalog)
MP2637AGR-P Specifications
| Battery Chemistry | Li-ion / Li-Polymer |
| Number of Cells | 1 (single-cell) |
| Charger Topology | Switch-mode (switching) |
| Maximum Charge Current | 2.5 A |
| Maximum System Boost Current | 2.4 A |
| Power Path Management | Yes (PPM) |
| Operating Modes | Charge mode and Boost mode |
| Trickle Charge Timer | Yes (with trickle timer) |
| Package | 24-QFN (4x4 mm) |
| Mounting Type | Surface Mount |
| Evaluation Board | EV2637-R-00A |
MP2637AGR-P 24-qfn (4x4 mm) Pin Configuration Guide
Pin configuration for MP2637AGR-P (24-qfn (4x4 mm) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for MP2637AGR-P.
Refer to the datasheet for full pin configuration.
Typical Applications
MP2637AGR-P is suitable for 6 applications: Power Banks and Portable Energy Storage, Handheld and Wearable Portable Devices, Portable Medical and Diagnostic Instruments, Industrial Portable Test and Measurement Equipment, Battery-Backup and Uninterruptible Single-Cell Systems, Consumer Electronics Charging Docks and Cases.
Power Banks and Portable Energy Storage
The MP2637AGR-P fits power bank architectures because its dual charge/boost modes with power path management handle the bidirectional energy flow such products require. In charge mode it replenishes the single-cell Li-ion battery at up to 2.5A from USB or adapter input; in boost mode it delivers up to 2.4A from the battery to the output rail. Because PPM powers the load directly from input when present, pass-through charging works even with an empty battery, and switching topology keeps losses low at 2.5A rates where linear chargers would dissipate watts of heat.
Recommended
Handheld and Wearable Portable Devices
Handheld instruments, portable audio, and wearable devices benefit from the MP2637AGR-P's high integration: charger, power path, and boost converter in one 24-QFN (4x4 mm) footprint, minimizing board area in space-constrained products. The 2.5A switch-mode charge current shortens recharge times compared to linear chargers, while the 2.4A system boost keeps the product running from the battery when the adapter is unplugged. Power path management ensures the system boots instantly even from a fully depleted cell - important for consumer expectations of always-ready devices.
Recommended
Portable Medical and Diagnostic Instruments
Portable medical monitors and diagnostic tools demand uninterrupted operation during battery swap or charging, which the MP2637AGR-P's power path management directly addresses. The system rail is regulated from the adapter whenever input is present, so the instrument keeps running while the single-cell Li-ion battery independently charges at up to 2.5A. When input power fails, seamless transition to boost mode sustains up to 2.4A of system current from the battery, preventing measurement interruptions. The high-efficiency switching topology also reduces internal temperature rise in enclosed handheld housings.
Recommended
Industrial Portable Test and Measurement Equipment
Field-test instruments and portable measurement equipment use the MP2637AGR-P to maintain a stable system rail through charging cycles and power-source changes. The 2.5A switching charge current refills single-cell packs quickly between jobs, and the boost mode's 2.4A capability supports the instrument's processor and display directly from the battery when no adapter is available. The trickle-charge timer safely recovers deeply discharged packs left idle in storage. The EV2637-R-00A evaluation board's documented design example accelerates prototyping with validated inductor and compensation values.
Recommended
Battery-Backup and Uninterruptible Single-Cell Systems
Any single-cell Li-ion system requiring ride-through of input power loss - IoT gateways, security sensors, remote data loggers - can use the MP2637AGR-P as an integrated backup-power manager. In normal operation the input powers the load through the power path while maintaining the battery at full charge with up to 2.5A available for fast recovery after a discharge event. When the input fails, the device automatically enters boost mode and supplies up to 2.4A to the system from the battery, delivering seamless continuity without external supervisor circuitry or a separate boost converter.
Recommended
Consumer Electronics Charging Docks and Cases
Charging docks, battery cases, and powered accessories leverage the MP2637AGR-P's compact 24-QFN (4x4 mm) integration and flexible single-cell management. The charger accepts adapter input to refill the accessory's Li-ion cell at up to 2.5A while, thanks to power path management, simultaneously passing regulated power to the host device. In untethered operation, boost mode supplies up to 2.4A to the load. The switching architecture's low heat generation suits enclosed plastic housings typical of consumer accessories, and the trickle timer protects batteries stored long periods before first use.
Recommended
Recommended Products Summary
Engineering reference data for MP2637AGR-P β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MP2637GR-Z |
|---|---|---|
| Package | 24-QFN (4x4 mm) | 24-QFN (4x4 mm) - same |
| Brand | Monolithic Power Systems | Monolithic Power Systems |
| Battery Chemistry | Li-ion / Li-Polymer, 1 cell | Li-ion / Li-Polymer, 1 cell |
| Maximum Charge Current | 2.5 A | 2.5 A |
| Maximum System Boost Current | 2.4 A | 2.4 A |
| Power Path Management | Yes (PPM) | Yes (PPM) |
| Operating Modes | Charge mode + Boost mode | Charge mode + Boost mode |
| Trickle Charge Timer | Yes | Yes |
Key Differentiators
- Integrated power path management with boost mode (vs MP2637GR-Z)
- Switch-mode efficiency at 2.5A charge current (vs Typical linear single-cell chargers)
- Single-IC system power management (vs Discrete charger + boost converter solutions)
Design Notes
The MP2637AGR-P is a switch-mode charger, so layout dominates performance. Follow the datasheet application guidelines: place the inductor, input capacitor, and BAT/SYS capacitors as close to the IC as possible and keep the high-current switching loop area minimal to reduce EMI and ringing. Use a solid ground plane with the QFN exposed pad soldered to a thermal via array. The datasheet design example and the application schematic (Figure 16) provide validated component values - start from those before optimizing.
Verify that your input source can supply both the 2.5A charge current plus the full system load simultaneously, because power path management powers the system directly from the input. If your adapter is current-limited, set the charge current below the adapter's capability to avoid input collapse; the trickle-charge timer handles deeply discharged cells, but an input current limit or charger-current setting margin is still required. Confirm all input voltage and regulation-voltage limits against the MPS datasheet absolute maximum and operating tables.
Estimated: unlike a linear charger dissipating roughly (VIN - VBAT) x ICHG (e.g., (5V - 3.7V) x 2.5A ~ 3.3W), the MP2637AGR-P's switching topology keeps losses to inductor DCR, switch resistance, and diode losses - typically a fraction of that at 2.5A. Even so, the 4x4 QFN relies on the PCB copper pour for heat extraction: allocate at least a modest copper area with thermal vias under the exposed pad, especially in enclosed portable housings with limited airflow.
Do not assume boost-mode and charge-mode component values are interchangeable: the inductor must be rated for both the 2.5A charge current and the 2.4A boost output without saturating. Confirm the battery pack includes appropriate protection, since charger ICs manage charge profile but do not replace cell-level protection. Validate the complete charge/boost transition behavior on the EV2637-R-00A evaluation board before final PCB release, per the MPS product page guidance.
Compliance Information
Compliance data was not present in the verified web data for MP2637AGR-P. The -P suffix on MPS parts commonly indicates a Green/RoHS packaging variant, but this must be confirmed on the official MPS product page or distributor compliance documents before use in regulated designs.
