My Inquiry
My Account
Monolithic Power Systems Inc. MP26123DR-LF-Z
- Part No.:
- MP26123DR-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Chargers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
MP26123DR-LF-Z.pdf
- Description:
- IC BATT CHG LI-ION 2-3CELL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:19,624
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP26123DR-LF-Z from Monolithic Power Systems is a monolithic 2A, 600kHz synchronous step-down switching Li-ion battery charger IC for 2- or 3-cell packs, featuring integrated 0.2Ω high-side MOSFET, ±0.75% battery voltage regulation accuracy, and dual-loop (current/voltage) control architecture. It operates from 9V–24V input and delivers precise constant-current/constant-voltage charging with thermal shutdown, cycle-by-cycle over-current protection, and NTC-based battery temperature monitoring - deployed in portable media players and netbooks.
For engineers reviewing the MP26123DR-LF-Z datasheet, MP26123DR-LF-Z pinout, MP26123DR-LF-Z application, or MP26123DR-LF-Z equivalent, key selection criteria include programmable 2A charge current via external sense resistor, 3.3V internal reference output (VREF33), fixed 600kHz switching frequency, preconditioning for deeply depleted batteries, and open-drain CHGOK/ACOK status signaling.
Technical Context
The MP26123DR-LF-Z implements peak-current-mode control with two independent compensation networks (COMPI for current loop, COMPV for voltage loop), enabling fast transient response and stable regulation across charge stages. Its dual-loop architecture dynamically selects between GMI (current amplifier) and GMV (voltage amplifier) outputs to govern duty cycle based on real-time battery voltage and sensed charge current.
It integrates a 3.3V linear regulator (VREF33) capable of sourcing up to 30mA for external biasing, supports power-path management via ACOK-driven MOSFET control, and uses an internal 0.1µA current source at TMR to set both trickle-charge timeout (30 min) and total charge timeout (3 hours) via external capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9V to 24V - supports wide-input industrial and adapter-powered systems without pre-regulation. |
| Max Charge Current | 2A - programmable via external sense resistor (e.g., 100mΩ yields 2A per ICHG = 200mV/RS1). |
| Battery Voltage Accuracy | ±0.75% - ensures tight CV termination for 2-cell (8.4V) or 3-cell (12.6V) Li-ion packs. |
| Switching Frequency | 600kHz - enables compact magnetics and low-output-ripple design with minimal EMI filtering. |
| Integrated MOSFET RDS(ON) | 0.2Ω - reduces conduction loss and eliminates need for external high-side switch. |
| Thermal Shutdown Threshold | 150°C - protects die during sustained high-power operation or poor PCB thermal layout. |
| VREF33 Output | 3.3V ±30mV - powers external circuitry (e.g., microcontroller, thermistor divider) with load regulation up to 10mA. |
Pinout & Package
MP26123DR-LF-Z is housed in a thermally enhanced 4mm × 4mm QFN-16 package with exposed thermal pad on underside for efficient heat dissipation in high-current charging applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | IC supply input | Power rail for internal logic and gate drivers; requires local decoupling to GND. |
| 2 NTC | Thermistor interface | Analog input for battery temperature sensing using resistor divider with VREF33 and ground-referenced NTC. |
| 3 ACOK | Input supply status indicator | Open-drain output pulled low when VIN ≥ UVLO + 300mV and VCC is valid - used for power-path MOSFET control. |
| 4 CHGOK | Charge status indicator | Open-drain output: low = active charging; high = full charge, fault, or suspended state. |
| 5 VREF33 | Internal 3.3V reference | Stable 3.3V output with ≤30mV load regulation; bypassed with 1µF ceramic capacitor to GND. |
| 6 EN | Enable control input | Active-high digital enable; <0.4V = shutdown, >1.8V = operational; draws only 0.2µA in shutdown. |
| 7 CELLS | Cell count configuration | Logic level select: grounded = 2-cell mode (8.4V), floating or tied to VREF33 = 3-cell mode (12.6V). |
| 10 BATT | Battery positive terminal | Main battery connection point; referenced for current sensing (CSP–BATT) and voltage regulation. |
| 11 CSP | Current-sense positive input | High-side current sense node; forms differential pair with BATT to measure charge current via RS1. |
| 12 GND | Analog/digital ground | Common reference for all signals; must be routed outside high-di/dt paths to avoid noise coupling. |
| 13 TMR | Charge timer programming | Capacitor-connected node charged/discharged by 0.1µA current source to set 30-min trickle and 3-hr total timeout. |
| 14 BST | Bootstrap supply | Connects to SW via capacitor to generate gate drive voltage >VIN for integrated high-side MOSFET. |
| 15 SW | Switch node | Drain of internal MOSFET; connects to inductor and bootstrap capacitor - high dv/dt node requiring short trace routing. |
| 16 VIN | Main input supply | 9V–24V input rail; requires ≥4.7µF X5R/X7R ceramic capacitor close to pin for ripple suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Preconditioning for dead batteries | Trickle-charge mode initiates below 3.0V/cell (e.g., 6.0V for 2-cell), limiting current to 10% of programmed ICC until threshold reached. |
| Programmable safety timer | Two-stage timeout: 30-minute limit for trickle phase and 3-hour limit for full charge cycle - prevents overcharging of degraded cells. |
| NTC-based thermal protection | Internal window comparator monitors NTC voltage (73.5% and 29.5% of VREF33) to halt charging outside 0°C–50°C range. |
| Efficiency-optimized integration | 0.2Ω RDS(ON) MOSFET and 600kHz fixed-frequency operation deliver up to 90% efficiency at 2A output. |
| Power-path ready signaling | ACOK and CHGOK open-drain outputs support automatic MOSFET-based power-path management without external logic. |
Applications
| Portable Media Player | Netbook |
|---|---|
|
Use Scenario: Recharging a 3-cell (11.1V nominal) Li-ion pack in a handheld video player with USB-C or barrel-jack adapter input. IC Role / Device Role / Timing Role: Primary switching charger IC managing CC/CV profile, battery temperature monitoring, and end-of-charge signaling. Use Value: Enables full recharge in under 2.5 hours at 2A while preventing thermal runaway via NTC feedback and 150°C thermal shutdown. |
Use Scenario: Charging a 2-cell (7.4V nominal) Li-ion battery in a fanless netbook powered by a 19V wall adapter. IC Role / Device Role / Timing Role: Standalone battery charger with integrated power-path capability to allow system boot from dead battery when adapter is connected. Use Value: Eliminates need for external power-path MOSFET driver; ACOK signal directly controls blocking FET to prioritize adapter power over battery discharge. |
| Mobile Internet Device | Distributed Power System |
|
Use Scenario: Compact charging solution for a ruggedized MIDs operating in variable ambient temperatures (-20°C to +60°C). IC Role / Device Role / Timing Role: Battery management unit providing cell-count flexibility (2/3-cell), thermal cutoff, and robust fault reporting via CHGOK/ACOK. Use Value: Supports wide input (9–24V) to accommodate multiple adapter types and maintains ±0.75% voltage accuracy across temperature for reliable SOC estimation. |
Use Scenario: Modular battery charging module in a distributed industrial sensor node with remote 24V PoE-derived input. IC Role / Device Role / Timing Role: High-efficiency DC-DC charger delivering regulated 2A output with built-in timer-based fail-safe and cycle-by-cycle current limiting. Use Value: Reduces BOM count by integrating MOSFET, reference, and dual-loop control - simplifies compliance testing for UL/IEC 62368-1 battery safety requirements. |
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 |
|---|---|---|---|
| TI BQ24725A | Requires external high-side MOSFET; supports up to 4-cell; includes SMBus interface and dynamic power management. | Targeted at notebook platforms needing host-controlled charging and multi-chemistry support (Li-ion/NiCd). | Select when system-level communication (SMBus) and flexible cell count (>3) are required - not drop-in compatible due to different pinout and control scheme. |
| Analog Devices LTC4155 | USB-powered only (max 20V input); integrates USB OTG boost; no NTC monitoring; uses external sense resistor but no integrated MOSFET. | Optimized for portable devices with USB-only charging and bidirectional power (OTG mode). | Choose for USB-centric designs where adapter input is secondary; lacks 24V input capability and thermal monitoring of MP26123DR-LF-Z. |
Compared with BQ24725A and LTC4155, MP26123DR-LF-Z offers higher integration (integrated 0.2Ω MOSFET), wider 9–24V input range, and dedicated NTC thermal protection - making it optimal for cost-sensitive, adapter-powered 2-/3-cell applications without host microcontroller coordination.
Availability
MP26123DR-LF-Z is available at Aetrix Electronics and suitable for portable media players, netbooks, and mobile internet devices requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP26123DR-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 mixed-signal ICs for power management, motion control, and automotive applications.
The MP26123 belongs to MPS's battery charger product line, designed specifically for high-efficiency, standalone switching charge solutions in space-constrained portable electronics with stringent thermal and safety requirements.
FAQ
What is the maximum supported battery configuration for MP26123DR-LF-Z?
The MP26123DR-LF-Z supports exactly two configurations: 2-cell (8.4V float) and 3-cell (12.6V float) Li-ion battery packs. Cell count is selected via the CELLS pin - grounded for 2-cell, floating or tied to VREF33 for 3-cell. It does not support 1-cell, 4-cell, or LiFePO₄ chemistries.
How is charge current programmed, and what tolerance applies?
Charge current is set by an external sense resistor (RS1) between CSP and BATT pins using ICHG = 200mV / RS1. With RS1 = 100mΩ, typical current is 2.0A. The current-sense voltage is specified at 200mV ±30mV (170–230mV), resulting in ±15% current tolerance at nominal conditions.
Does MP26123DR-LF-Z support USB PD or other programmable input protocols?
No. MP26123DR-LF-Z accepts only fixed DC input between 9V and 24V. It has no native USB PD, QC, or proprietary protocol negotiation capability. Input voltage must be pre-regulated; dynamic input voltage adjustment requires external DC-DC pre-regulator or fixed-output adapter.
What happens when the TMR capacitor is omitted or incorrectly sized?
Omitting the TMR capacitor disables both trickle-charge and total-charge timeouts, risking overcharge and thermal hazard. An undersized capacitor causes premature timeout (e.g., 100nF triggers ~3-minute total timeout), halting charge before full capacity. Correct sizing (e.g., 1µF = 3h total) is mandatory for safe operation.
Can VREF33 power external circuitry, and what is its current limit?
Yes - VREF33 provides a regulated 3.3V output with ≤30mV load regulation from 0–10mA. Total load must stay below 10mA to maintain accuracy; exceeding this may cause VREF33 droop and affect NTC biasing or EN threshold stability. A 1µF ceramic bypass capacitor is required.
Is the MP26123DR-LF-Z pin-compatible with earlier MP26123 revisions?
Yes - MP26123DR-LF-Z is the RoHS-compliant, tape-and-reel packaged version of the MP26123DR. Electrical characteristics, pinout, and thermal performance match Rev. 1.01 datasheet specifications. The "-LF-Z" suffix denotes lead-free finish and reel packaging; no functional differences exist.
How does the MP26123DR-LF-Z handle reverse current from battery to input?
It provides inherent reverse-blocking via the internal high-side MOSFET's body diode directionality and control logic. When VIN < VBATT − 180mV, the device disables switching and enters low-quiescent mode (2.0mA). No external reverse-protection diode or MOSFET is needed for basic operation.
MP26123DR-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:
- 2 ~ 3
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- Over Current, Over Temperature
- Charge Current - Max:
- 2A
- Battery Pack Voltage:
- 12.6V
- Voltage - Supply (Max):
- 24V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
MP26123DR-LF-Z FAQ
1.How can I place an order for MP26123DR-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP26123DR-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 MP26123DR-LF-Z reliable?
The price and inventory of MP26123DR-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 MP26123DR-LF-Z is usually 5 days.
3.What payment methods are accepted for MP26123DR-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP26123DR-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP26123DR-LF-Z?
MP26123DR-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP26123DR-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 MP26123DR-LF-Z?
For technical support, including MP26123DR-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP26123DR-LF-Z requirements.
6.How does Aetrix verify that MP26123DR-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP26123DR-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 MP26123DR-LF-Z meets industry standards.
7.What is the process for return or replacement of MP26123DR-LF-Z?
All MP26123DR-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP26123DR-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 MP26123DR-LF-Z part is unused and in its original packaging.
Return procedure for MP26123DR-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP26123DR-LF-Z Tags
-
BQ21040DBVR
Texas Instruments
-
MCP73812T-420I/OT
Microchip Technology
-
MCP73831T-2ACI/OT
Microchip Technology
-
MCP73832T-2ACI/OT
Microchip Technology
-
MCP73831T-2DCI/OT
Microchip Technology
-
MCP73832T-2DCI/OT
Microchip Technology
-
MCP73831T-2ATI/OT
Microchip Technology
-
MCP73832T-2ATI/OT
Microchip Technology
-
MCP73831T-5ACI/OT
Microchip Technology
-
MCP73832T-2ACI/MC
Microchip Technology
-
MCP73831T-2ACI/MC
Microchip Technology
-
MCP73831T-2ATI/MC
Microchip Technology
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
