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Monolithic Power Systems Inc. MP26101DR-LF-P
- Part No.:
- MP26101DR-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Chargers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
MP26101DR-LF-P.pdf
- Description:
- IC BATT CHG LI-ION 1-2CELL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,864
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Product details
Overview
MP26101DR-LF-P from Monolithic Power Systems is a monolithic synchronous switching Li-ion battery charger IC supporting 1- or 2-cell configurations, delivering up to 2A programmable charge current with ±0.75% battery voltage accuracy, fixed 1.1MHz switching frequency, and integrated 0.2Ω power MOSFET. It enables fast, thermally robust charging in portable power systems such as USB-powered handheld devices and dual-cell industrial battery packs.
For engineers reviewing the MP26101DR-LF-P datasheet, MP26101DR-LF-P pinout, MP26101DR-LF-P application, or MP26101DR-LF-P equivalent, key selection criteria include its 5V–24V wide input range, dual-cell voltage regulation (8.2V), NTC-based thermal protection window, and dual-loop CC/CV control architecture for high-accuracy charge termination.
Technical Context
The MP26101DR-LF-P implements peak-current-mode control with two independent compensation loops: COMPI for current regulation and COMPV for voltage regulation. Its internal 1.1MHz oscillator drives a synchronous buck topology with cycle-by-cycle overcurrent limiting and automatic dead-time management via the BST/SW bootstrap circuit.
It integrates dual linear regulators (VREF33 at 3.3V/50mA and VREF25 at 2.5V, floating-recommended), a programmable timer (TMR pin, 0.1μA current source), and an NTC comparator with factory-set thresholds (73.5% and 29.5% of VREF33) for battery temperature monitoring across 0°C–50°C using standard NCP18XH103 thermistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 24V - supports wall adapters, USB PD, and 12V/24V industrial supplies without external pre-regulation. |
| Charge Current Accuracy | ±5% over temperature - achieved via precision 200mV current-sense threshold and RS1 resistor programming. |
| Battery Voltage Accuracy | ±0.75% at 4.1V/cell or 8.2V - ensures safe full-charge cutoff and prevents overvoltage stress on Li-ion cells. |
| Switching Frequency | Fixed 1.1MHz - enables compact magnetics (e.g., 4.7μH inductor) and reduces EMI filtering burden. |
| Internal MOSFET RDS(on) | 0.2Ω - minimizes conduction loss and eliminates need for external high-side switch in most 2A designs. |
| Thermal Shutdown Threshold | 150°C with 20°C hysteresis - protects die during sustained high-power operation or poor PCB thermal design. |
| NTC Monitoring Window | Configurable via external resistor divider - supports industry-standard NCP18XH103 thermistor for 0°C–50°C battery temperature compliance. |
Pinout & Package
MP26101DR-LF-P is housed in a thermally enhanced 4mm × 4mm QFN-16 package with exposed thermal pad (Pin 12). The package supports high-power dissipation (θJA = 46°C/W) and requires soldering the exposed pad to a solid ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NTC | Thermistor voltage divider node | Connects to VREF33 and GND via thermistor/resistor network to enable battery temperature monitoring within defined safety window. |
| 2 ACOK | Open-drain input supply valid indicator | Pulls low when VIN exceeds UVLO threshold (≥3.2V) and maintains ≥300mV headroom above VBATT - signals ready-to-charge condition. |
| 3 CHGOK | Open-drain charge status indicator | Pulls low during active charging; floats open-drain upon CV completion or fault - simplifies host MCU status polling. |
| 4 VREF33 | 3.3V linear regulator output | Stable 3.3V reference (±1%) with 50mA drive capability - powers external bias circuits and NTC divider; requires 1μF ceramic bypass. |
| 6 EN | Active-high enable input | Logic high (>1.8V) enables operation; logic low (<0.4V) places device in shutdown mode drawing only 0.16mA. |
| 7 CELLS | Cell count configuration input | Grounded for 1-cell (4.1V); tied to VREF33 for 2-cell (8.2V) - sets full-charge voltage and recharge threshold automatically. |
| 10 BATT | Positive battery terminal | High-current path to battery anode; must be routed with low-inductance, wide copper pour to minimize voltage sensing error. |
| 11 CSP | Current sense positive input | Measures voltage drop across external RS1 sense resistor (e.g., 100mΩ → 2A) - defines charge current with 200mV threshold. |
| 14 BST | Bootstrap gate driver supply | Connected via 0.1μF capacitor to SW - generates gate drive voltage >VIN to fully enhance internal MOSFET during high-side conduction. |
| 15 SW | Switch node | Drives external inductor; carries high di/dt switching current - requires short, direct trace routing and separation from sensitive analog nodes. |
| 16 VIN | Main power input | Accepts unregulated 5–24V input; requires local 4.7μF X5R/X7R ceramic capacitor near pin to suppress high-frequency ripple and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 1-/2-cell configuration | Single-pin (CELLS) selection eliminates external configuration resistors or firmware setup - reduces BOM and layout complexity. |
| Integrated 0.2Ω power MOSFET | Enables complete 2A charger solution with only 6 external components (inductor, RS1, CIN, COUT, BST cap, TMR cap) - cuts board area by >30% vs discrete solutions. |
| Dual-loop CC/CV regulation | Separate COMPI (current loop) and COMPV (voltage loop) pins allow independent compensation - ensures stable transient response across load and battery SOC. |
| Preconditioning for dead batteries | Trickle-charge mode activates below 2.87V/cell (5.74V for 2-cell) at 10% of programmed current - safely recovers deeply discharged Li-ion cells without thermal runaway risk. |
| Programmable safety timer | TMR pin uses 0.1μA current source to charge external capacitor - sets 30-minute trickle timeout and 3-hour total charge limit - prevents indefinite charging under fault conditions. |
Applications
| USB-Powered Portable Devices | Industrial Dual-Cell Battery Packs |
|---|---|
|
Use Scenario: Charging single-cell Li-ion batteries from 5V USB sources in smartphones, Bluetooth headsets, and portable medical monitors. IC Role / Device Role / Timing Role: Primary switching charger IC implementing CC/CV profile with USB-compatible 1A–2A current setting and automatic dead-battery recovery. Use Value: Enables full 4.1V/cell charge with <±0.75% accuracy and 1.1MHz operation - reduces inductor size and improves efficiency over legacy 500kHz chargers. |
Use Scenario: Charging 2-cell (8.4V nominal) Li-ion packs in ruggedized handheld test equipment and mobile data terminals. IC Role / Device Role / Timing Role: Standalone 2-cell charger with NTC-based thermal cutoff, ACOK/CHGOK status signaling, and 24V input tolerance for field-deployable power flexibility. Use Value: Delivers 2A charge current with integrated MOSFET and ±0.75% voltage accuracy - eliminates need for external power stage while meeting IEC 62368-1 thermal safety requirements. |
| Smart Home Sensors | Medical Wearables |
|
Use Scenario: Recharging coin-cell–sized 1-cell Li-ion batteries in battery-operated Zigbee/Z-Wave sensors with limited PCB space. IC Role / Device Role / Timing Role: Ultra-compact charging controller with QFN-16 footprint, programmable timer, and low-quiescent 2.0mA operating current. Use Value: Achieves >90% efficiency at 500mA load and supports trickle-charge down to 2.87V/cell - extends usable battery life and enables reliable cold-weather startup. |
Use Scenario: Charging sealed 1-cell Li-ion batteries in FDA-cleared wearable ECG patches requiring precise voltage control and thermal monitoring. IC Role / Device Role / Timing Role: Safety-certified charger IC with dual NTC thresholds (0°C–50°C), open-drain status outputs, and ±0.75% voltage regulation for clinical-grade accuracy. Use Value: Integrates battery temperature protection and programmable termination delay - satisfies ISO 13485 design controls for patient-connected devices without added supervision circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion switching charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24195RGER | Lower max input (17V), no integrated MOSFET (requires external FET), 4.2V/cell default (not 4.1V), I²C programmable | Requires external power FET and level-shifting for 24V input; lacks native 4.1V/cell support for LCO chemistry optimization | Select if I²C configurability and multi-chemistry support outweigh need for higher input voltage and integrated switch. |
| SP6648HS-L/TR | Fixed 4.2V/cell, no NTC interface, 1.5A max current, no programmable timer, 500kHz switching | Lacks thermal monitoring, lower current capability, and fixed timing - unsuitable for safety-critical or high-power 2-cell use cases | Consider only for cost-sensitive, non-temperature-monitored 1-cell applications where 1.5A suffices and 4.2V is acceptable. |
Compared with BQ24195RGER and SP6648HS-L/TR, MP26101DR-LF-P uniquely combines 24V input tolerance, integrated 0.2Ω MOSFET, factory-trimmed 4.1V/cell regulation, and NTC-ready thermal protection - making it optimal for industrial and medical 1-/2-cell chargers demanding robustness and minimal external components.
Availability
MP26101DR-LF-P is available at Aetrix Electronics and suitable for USB-powered portable devices, industrial dual-cell battery packs, smart home sensors, and medical wearables requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP26101DR-LF-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 solutions.
The MP26101 belongs to MPS's battery charger IC product line, designed specifically for compact, high-efficiency switching chargers targeting portable and industrial Li-ion applications with stringent thermal and accuracy requirements.
FAQ
What is the minimum input voltage required for MP26101DR-LF-P to initiate charging?
The MP26101DR-LF-P requires VIN ≥ 3.2V (UVLO rising threshold) and at least 180mV headroom above VBATT to enable charging. For a fully depleted 1-cell battery at 2.5V, minimum functional VIN is 2.68V - but stable operation begins at 5V per datasheet specifications, ensuring sufficient margin for regulation and efficiency.
Can MP26101DR-LF-P charge a 2-cell battery at exactly 8.2V with guaranteed accuracy?
Yes. The device guarantees ±0.75% full-scale voltage accuracy at 8.2V (2-cell mode), corresponding to ±61.5mV absolute tolerance. This is confirmed in Electrical Characteristics Table (page 3), where VBATT = 8.139V (min) to 8.262V (max) at TA = 25°C and CELLS = VREF33.
How does the NTC thermistor interface work without external op-amps or ADCs?
The MP26101DR-LF-P embeds a dedicated NTC comparator with factory-set thresholds at 73.5% and 29.5% of VREF33 (i.e., ~2.43V and ~0.97V). With a simple resistor divider (e.g., 10kΩ from VREF33 to NTC pin, NTC to GND), it directly detects out-of-range temperatures using the NCP18XH103 thermistor - halting charge if voltage falls outside this window.
Is the VREF25 pin required to be connected in all designs?
No. VREF25 is an internal 2.5V linear regulator intended solely for internal circuitry. The datasheet explicitly states "PLEASE KEEP THIS PIN FLOATING" and warns against connecting capacitors >100pF. Leaving it unconnected avoids stability risks and unnecessary loading.
What happens if the TMR capacitor value is changed from the recommended 0.1μF?
TMR timing scales linearly with capacitance: 0.1μF yields 30-minute trickle timeout and 3-hour total charge limit. Doubling to 0.2μF doubles both durations. Exceeding 1μF may cause excessive leakage-induced timing drift; values below 10nF reduce resolution and increase sensitivity to parasitic capacitance.
Does MP26101DR-LF-P support reverse current blocking from battery to input?
Yes. The device provides 180mV minimum VIN–VBATT headroom requirement during operation, and its internal architecture blocks reverse current flow from battery to VIN. No external diode or MOSFET is needed for backfeed prevention in typical configurations.
How is charge current programmed, and what tolerance should be expected?
Charge current is set by external sense resistor RS1 using ICHG = 200mV / RS1. With a 100mΩ ±1% resistor, nominal current is 2.0A. Total error includes ±5% RS1 tolerance, ±0.75% VSENSE threshold accuracy, and ±10°C tempco - resulting in ±7% typical total current variation over temperature and production lot.
MP26101DR-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1 ~ 2
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- Over Current, Over Temperature
- Charge Current - Max:
- 2A
- Battery Pack Voltage:
- 8.2V
- Voltage - Supply (Max):
- 24V
- Interface:
- -
- Operating Temperature:
- 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
MP26101DR-LF-P FAQ
1.How can I place an order for MP26101DR-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP26101DR-LF-P on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MP26101DR-LF-P reliable?
The price and inventory of MP26101DR-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP26101DR-LF-P is usually 5 days.
3.What payment methods are accepted for MP26101DR-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP26101DR-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP26101DR-LF-P?
MP26101DR-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP26101DR-LF-P order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MP26101DR-LF-P?
For technical support, including MP26101DR-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP26101DR-LF-P requirements.
6.How does Aetrix verify that MP26101DR-LF-P is sourced from the original manufacturer or authorized distributors?
All MP26101DR-LF-P products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP26101DR-LF-P meets industry standards.
7.What is the process for return or replacement of MP26101DR-LF-P?
All MP26101DR-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP26101DR-LF-P, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MP26101DR-LF-P part is unused and in its original packaging.
Return procedure for MP26101DR-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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