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Monolithic Power Systems Inc. MP26101DR-LF-Z
- Part No.:
- MP26101DR-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Chargers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
MP26101DR-LF-Z.pdf
- Description:
- IC BATT CHG LI-ION 1-2CELL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MP26101DR-LF-Z from Monolithic Power Systems is a monolithic 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 operates across 5V–24V input, regulates at 4.1V/cell, and implements full-charge termination, auto-recharge at 3.9V/cell, and NTC-based thermal monitoring-used in portable power systems requiring compact, high-efficiency charging.
For engineers reviewing the MP26101DR-LF-Z datasheet, MP26101DR-LF-Z pinout, MP26101DR-LF-Z application, or MP26101DR-LF-Z equivalent, key selection criteria include its dual-cell configuration control (via CELLS pin), CSP/BATT current-sense architecture, VREF33/VREF25 dual reference outputs, and fault indicators (ACOK/CHGOK) for real-time system-level battery management integration.
Technical Context
The MP26101DR-LF-Z employs peak-current-mode control with two independent regulation loops: COMPI for constant-current (CC) mode via external sense resistor RS1, and COMPV for constant-voltage (CV) mode feedback. Its internal 1.1MHz oscillator enables fast transient response and small external components, while the built-in 0.2Ω MOSFET eliminates external switch requirements.
It integrates dual linear regulators (VREF33 = 3.3V/50mA max, VREF25 = 2.5V no-load), NTC window comparator with programmable low/high thresholds (73.5%/29.5% of VREF33), and cycle-by-cycle overcurrent protection triggered at 3.8A peak. Thermal shutdown activates at 150°C with hysteresis recovery at ≤130°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 24V - supports wide-input wall adapters, USB PD, and industrial DC supplies without pre-regulation. |
| Charge Current | Up to 2A programmable via RS1 - enables fast charging for 1S/2S packs with 100mΩ sense resistor yielding nominal 2A output. |
| Battery Voltage Accuracy | ±0.75% at 4.1V/cell - ensures precise CV termination critical for Li-ion cell longevity and safety compliance. |
| Switching Frequency | Fixed 1.1MHz - allows use of small 4.7μH inductors and ceramic capacitors, reducing solution footprint and EMI filtering burden. |
| Internal MOSFET RDS(ON) | 0.2Ω - minimizes conduction loss and eliminates need for external high-side switch, simplifying BOM and layout. |
| NTC Monitoring | Programmable low/high thresholds (73.5%/29.5% × VREF33) - enables accurate temperature window detection using standard NCP18XH103 thermistor. |
| Termination Threshold | 5–15% of ICC - configurable end-of-charge cutoff to balance capacity utilization and cycle life per battery chemistry. |
| Auto-Recharge Threshold | 3.9V/cell with 100mV/cell hysteresis - prevents premature recharging while maintaining safe voltage margin below full charge. |
Pinout & Package
MP26101DR-LF-Z is housed in a thermally enhanced 4mm × 4mm QFN-16 package with exposed pad for improved heat dissipation. The package supports standard reflow profiles and requires proper PCB copper pour under the exposed pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NTC | Thermistor voltage divider node | Connects to VREF33 and ground via thermistor/resistor network to enable battery temperature monitoring within defined window. |
| 2 ACOK | Open-drain input supply valid indicator | Pulls low when VIN > VBATT + 300mV and above UVLO threshold - signals presence of stable input source to host controller. |
| 3 CHGOK | Open-drain charge status indicator | Pulls low during active charging; floats open-drain upon completion or fault - provides direct hardware handshake for system sleep/wake logic. |
| 4 VREF33 | 3.3V linear regulator output | Supplies up to 50mA for external biasing; requires 1μF ceramic bypass to GND for stability - used for NTC divider and logic interface. |
| 6 EN | Active-high enable input | Logic high ≥1.8V enables operation; low ≤0.4V disables all functions and reduces quiescent current to 0.16mA - enables system-level power sequencing. |
| 7 CELLS | Cell count configuration input | Grounded = 1-cell (4.1V); tied to VREF33 = 2-cell (8.2V) - sets full-charge voltage and recharge thresholds without firmware intervention. |
| 10 BATT | Positive battery terminal connection | High-current path to battery anode; must be routed with low-inductance, wide trace - forms return path for charge current and voltage sensing. |
| 11 CSP | Current sense positive input | Paired with BATT to measure voltage drop across RS1 - determines actual charge current with 200mV full-scale range for precision programming. |
| 12 GND | Power and signal ground reference | Primary ground reference for all analog and switching circuits; exposed pad must be solidly connected to PCB ground plane for thermal and noise performance. |
| 14 BST | Bootstrap capacitor node | Connects to SW via 0.1μF ceramic capacitor - generates gate drive voltage above VIN to fully enhance internal high-side MOSFET. |
| 15 SW | Switch node output | Drives external inductor; carries high di/dt switching current - requires short, direct routing away from sensitive analog traces to minimize coupling. |
| 16 VIN | Main unregulated input supply | Accepts 5–24V; requires local 4.7μF X5R/X7R ceramic capacitor near pin to suppress input ripple and EMI - supports wide-range adapter compatibility. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.2Ω power MOSFET | Eliminates external switch component, reduces board area by ~30%, and improves efficiency over discrete solutions at 2A load. |
| Two independent control loops (COMPI/COMPV) | Enables simultaneous CC/CV regulation with <1% total error, ensuring tight charge profile adherence across temperature and line variations. |
| Programmable trickle-to-CC transition | Starts charging at 10% ICC when VBATT < 2.87V/cell - safely recovers deeply discharged batteries without damaging stress. |
| Dual reference outputs (VREF33/VREF25) | VREF33 powers external circuitry and NTC network; VREF25 remains floating unless ultra-low-noise bias needed - simplifies system power tree design. |
| Configurable timer-based charge termination | External TMR capacitor sets total charge time (3 hours max) and trickle timeout (30 min) - prevents indefinite charging under fault conditions. |
| Open-drain status pins (ACOK/CHGOK) | Enable direct GPIO interfacing with microcontrollers without level-shifting; support wired-OR logic for multi-charger status aggregation. |
Applications
| Smartphone Power Management | Industrial Handheld Terminal |
|---|---|
|
Use Scenario: Charging single-cell Li-ion battery from USB-C or wall adapter in space-constrained mobile device. IC Role / Device Role / Timing Role: Primary switching charger IC managing CC/CV profile, NTC monitoring, and status signaling to application processor. Use Value: 1.1MHz operation enables 4.7μH inductor and compact 4×4mm QFN footprint; ±0.75% voltage accuracy extends battery cycle life beyond 500 cycles. |
Use Scenario: Rechargeable 2-cell Li-ion pack powering ruggedized barcode scanner operating in variable ambient temperatures. IC Role / Device Role / Timing Role: Dual-cell charger with integrated thermal protection, enabling safe operation between –20°C and +60°C via NTC window comparator. Use Value: Programmable auto-recharge at 7.8V (3.9V/cell) maintains runtime without manual intervention; 24V max input supports universal field chargers. |
| Portable Medical Monitor | Wireless Headset Charging Dock |
|
Use Scenario: Battery-powered vital sign monitor requiring certified, low-risk charging with redundant safety mechanisms. IC Role / Device Role / Timing Role: Safety-critical charger implementing cycle-by-cycle OCP, thermal shutdown, and timer-based termination per IEC 62368-1. Use Value: Dual-loop regulation and ±0.75% accuracy meet medical-grade battery management requirements; CHGOK/ACOK provide fail-safe status reporting. |
Use Scenario: Compact charging cradle delivering 2A to dual earbud cases with minimal PCB area and no external MOSFETs. IC Role / Device Role / Timing Role: Integrated charger IC handling full charge profile, LED status indication via CHGOK, and input validation via ACOK. Use Value: Built-in 0.2Ω MOSFET reduces BoM count by 3 parts; 4.1V/cell CV setting matches common Li-ion chemistry in consumer audio devices. |
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 6.2V max input; uses external MOSFETs; I²C programmable but no NTC interface | Suitable for USB-only 5V input designs; lacks integrated thermal monitoring for battery packs | Select when digital configurability and small size outweigh need for wide-input or autonomous thermal safety. |
| MAX17592ATP+T | Higher 36V input; external MOSFET required; no integrated VREF33 or NTC comparator | Fits industrial 24V rail systems but adds 4 external FETs and separate reference/thermal ICs | Choose only when >24V input or higher than 2A current is required, accepting increased complexity and cost. |
Compared with BQ24195RGER and MAX17592ATP+T, MP26101DR-LF-Z uniquely combines wide 5–24V input, integrated MOSFET, dual reference outputs, and autonomous NTC monitoring in a single 4×4mm QFN - reducing total solution size by ≥40% and eliminating three external ICs in typical 1S/2S portable designs.
Availability
MP26101DR-LF-Z is available at Aetrix Electronics and suitable for smartphone power management, industrial handheld terminals, portable medical monitors, and wireless headset charging docks requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP26101DR-LF-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 over two decades of expertise in DC/DC conversion, battery management, and motor control solutions.
The MP26101 belongs to MPS's dedicated Li-ion switching charger product line, engineered for space-constrained, high-efficiency portable electronics where integration, accuracy, and autonomous safety features are critical design priorities.
FAQ
What is the minimum input voltage required for MP26101DR-LF-Z to initiate charging?
The MP26101DR-LF-Z requires VIN to exceed both the under-voltage lockout (UVLO) rising threshold (3.2V typical) and maintain at least 180mV headroom above battery voltage. For a fully depleted 1-cell battery at 2.5V, minimum functional VIN is 2.68V - however, reliable operation begins at 5V per datasheet specification due to internal regulator and gate-drive constraints.
How does the CELLS pin configure 1-cell vs. 2-cell operation?
The CELLS pin sets cell count directly: grounding it configures 4.1V/cell full-charge and 3.9V/cell recharge thresholds for 1S operation; connecting it to VREF33 (3.3V) selects 8.2V/cell and 7.8V/cell for 2S. Leaving it floating is prohibited - internal pull-down ensures default 1S behavior if unconnected, but datasheet mandates explicit biasing.
Can VREF25 be used to power external circuitry?
No - VREF25 is a dedicated 2.5V reference for internal comparators only. It cannot source significant current; loading it beyond 100pF capacitance or any DC load causes regulation failure. The datasheet explicitly states "PLEASE KEEP THIS PIN FLOATING" and prohibits bypass capacitors larger than 100pF.
What happens if the NTC voltage falls outside the programmed window?
When NTC pin voltage drops below 73.5% × VREF33 (low-temp fault) or rises above 29.5% × VREF33 (high-temp fault), the MP26101DR-LF-Z immediately halts charging, pulls CHGOK high (open-drain), and holds ACOK low if input is valid. Charging resumes automatically only after NTC voltage returns within both thresholds for >100ms.
Is the 2A charge current achievable across the full 5–24V input range?
No - maximum sustainable 2A output depends on input voltage and thermal conditions. At VIN = 5V (1S USB), duty cycle approaches 87% limit, reducing effective current; at VIN = 24V (2S), efficiency drops due to higher switching losses. Datasheet testing confirms 2A at VIN = 19V with proper heatsinking and layout.
How is charge termination time programmed using the TMR pin?
A capacitor CTMR connected from TMR to GND sets timing: trickle mode duration = CTMR × 30 minutes/μF, total charge time = CTMR × 3 hours/μF. With CTMR = 100nF, trickle timeout is 3 minutes and total timeout is 18 minutes - enabling precise safety-limited charge windows without software control.
Does MP26101DR-LF-Z support USB BC1.2 or proprietary fast-charge protocols?
No - it lacks USB enumeration, D+/D− detection, or protocol-specific signaling. However, its wide 5–24V input and programmable current make it compatible with USB PD 3.0 (5–20V) and QC 3.0 (3.6–20V) adapters when paired with external voltage negotiation ICs like TUSB320.
MP26101DR-LF-Z 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-Z FAQ
1.How can I place an order for MP26101DR-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP26101DR-LF-Z 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-Z reliable?
The price and inventory of MP26101DR-LF-Z 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-Z is usually 5 days.
3.What payment methods are accepted for MP26101DR-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP26101DR-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP26101DR-LF-Z?
MP26101DR-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP26101DR-LF-Z 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-Z?
For technical support, including MP26101DR-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP26101DR-LF-Z requirements.
6.How does Aetrix verify that MP26101DR-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP26101DR-LF-Z 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-Z meets industry standards.
7.What is the process for return or replacement of MP26101DR-LF-Z?
All MP26101DR-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP26101DR-LF-Z, 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-Z part is unused and in its original packaging.
Return procedure for MP26101DR-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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