My Inquiry
My Account
Monolithic Power Systems Inc. MP2631DQ-LF-Z
- Part No.:
- MP2631DQ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP2631DQ-LF-Z.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,304
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2631DQ-LF-Z from Monolithic Power Systems is a linear single-cell Li-ion/Li-polymer battery charger with integrated 5V/10mA high-voltage LDO, 28V input surge tolerance, programmable 200mA–1A CC/CV charging, and thermal shutdown. It operates from 3.5V–5.5V input, delivers ±0.75% battery voltage regulation, and supports charge status (CHG) and AC OK (ACOK) indication in portable devices.
For engineers reviewing the MP2631DQ-LF-Z datasheet, MP2631DQ-LF-Z pinout, MP2631DQ-LF-Z application, or MP2631DQ-LF-Z equivalent, key selection criteria include its 28V surge-rated input protection, dual-function LDO operation during SHDN mode, OVP-triggered automatic disconnect, and precise 4.20V ±0.02V CV threshold for safe lithium chemistry compliance.
Technical Context
The MP2631DQ-LF-Z implements a linear charging architecture with fixed 4.20V constant-voltage regulation and externally programmable constant-current via ISET resistor (100–1000mA range). Its internal OVP circuit disconnects both charger and LDO when VIN exceeds 7.0V (typ), with 400mV hysteresis and 2.1V UVLO threshold.
The integrated LDO remains active across SHDN states as long as VIN stays within 3V–7V, delivering regulated 5.0V ±150mV up to 10mA load; it enters dropout below 5.1V input and shuts off above 7.0V. Thermal limiting activates at 120°C (typ), with 10°C hysteresis and soft shutdown behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Current Range | 200mA to 1A, set by external ISET resistor; enables flexible battery capacity matching without IC replacement. |
| Battery Regulation Accuracy | ±0.75% over –5°C to +75°C; ensures reliable full-charge termination and prevents overvoltage stress on Li-ion cells. |
| LDO Output | 5.0V ±150mV at 0–10mA load; provides stable watchdog supply independent of charger enable state. |
| Input Surge Rating | 28V absolute max on IN pin; eliminates need for external TVS in USB/adapter-input systems with transient risk. |
| OVP Threshold | 7.0V (typ), with 400mV hysteresis; automatically isolates charger and LDO from overvoltage events to protect battery and system. |
| Thermal Shutdown | 120°C (typ), with 10°C hysteresis; prevents thermal runaway in compact PCB layouts with limited copper area. |
| Reverse Battery Current | <1µA when SHDN = low and input floating; avoids parasitic discharge during storage or fault conditions. |
Pinout & Package
MP2631DQ-LF-Z is housed in a thermally enhanced 10-pin 3mm × 3mm QFN package with exposed thermal pad (pin 5), rated for –40°C to +85°C operation. The package supports high-power dissipation (θJA = 50°C/W) and requires soldering of the exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input Supply | Accepts 3.5–5.5V nominal adapter/USB input; withstands up to 28V transients before OVP activation. |
| 2 SS/NC | Soft-Start Control / No Connect | Open-circuit enables internal soft-start; external capacitor adds controlled current ramp to limit inrush. |
| 3 ACOK | Open-Drain Input Status | Pulled low when 2.1V < VIN < 7.0V; signals valid input power to host microcontroller or PMIC. |
| 4 CHG | Open-Drain Charge Status | Pulled low during active charging; floats high at termination or fault-directly drives LED or GPIO. |
| 5 GND | Ground Reference & Thermal Pad | Must be connected to solid ground plane; exposed pad is primary thermal path and functional ground node. |
| 6 SHDN | Charger Enable/Disable | Logic-low or open enables charging; logic-high disables all functions except LDO (if VIN in range). |
| 7 NC | No Connection | Unbonded pin; must remain unconnected and unpopulated on PCB. |
| 8 ISET | Charge Current Programming | Connects to GND via precision resistor (e.g., 3.1kΩ for 500mA); sets CC value with ±13% variation over temperature. |
| 9 BATT | Battery Output | Delivers regulated CC/CV charge current directly to single-cell Li-ion anode; includes trickle mode below 2.6V. |
| 10 LDO | LDO Output | Provides 5V system supply up to 10mA; remains active during SHDN if VIN is 3–7V-ideal for charge monitoring circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5V/10mA LDO with SHDN persistence | LDO stays ON during SHDN mode if VIN ∈ [3V, 7V], enabling continuous system monitoring without separate regulator. |
| 28V input surge tolerance with auto-OVP disconnect | Internal protection circuit cuts off both charger and LDO when VIN > 7.0V, eliminating need for external clamping diodes or TVS. |
| Programmable CC/CV charge profile with auto-recharge | Recharges when VBATT falls to 4.0V (±100mV hysteresis), supporting long-term battery maintenance in always-on devices. |
| 0.75% battery voltage accuracy over temperature | Ensures consistent 4.20V CV termination across –5°C to +75°C, critical for cycle life and safety in consumer Li-ion applications. |
| <1µA reverse battery leakage | Prevents self-discharge when input is removed or SHDN asserted-extends shelf life and reduces standby power loss. |
Applications
| Smartphones | Digital Cameras |
|---|---|
|
Use Scenario: Compact handheld device requiring simultaneous battery charging and system power supervision from a single USB input. IC Role / Device Role / Timing Role: Linear charger manages CC/CV Li-ion charging while its integrated LDO powers the camera's image sensor supervisor IC during boot and idle. Use Value: Eliminates discrete LDO and OVP components, reducing BOM count by 3 parts and PCB area by ≥12 mm² in space-constrained 5V-input designs. |
Use Scenario: Portable digital camera with USB-powered charging and real-time battery status reporting to LCD UI. IC Role / Device Role / Timing Role: Provides accurate 4.20V CV termination and drives CHG/ACOK open-drain outputs directly to MCU GPIO pins for status polling. Use Value: Enables precise battery fuel gauging via voltage-based state-of-charge estimation, improving remaining runtime accuracy to ±3%. |
| PDAs | MP3 Players |
|
Use Scenario: Legacy PDA with replaceable Li-polymer battery and minimal board space for power management. IC Role / Device Role / Timing Role: Delivers 500mA CC charge current and supplies 5V/5mA to real-time clock (RTC) and touch controller during SHDN sleep mode. Use Value: Maintains RTC accuracy and touch responsiveness without waking main SoC-reducing average system power by 180µW. |
Use Scenario: Low-cost MP3 player using micro-USB for charging and playback, requiring robust surge immunity against wall adapter transients. IC Role / Device Role / Timing Role: Withstands 28V input surges while regulating charge current and providing clean 5V bias to audio DAC and flash memory interface. Use Value: Passes IEC 61000-4-5 Level 3 surge testing without external protection, cutting ESD design validation time by 40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear Li-ion charger with integrated LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24040DRCT | Fixed 4.2V CV, no programmable CC; LDO output disabled in shutdown; 20V max input rating. | Lacks 28V surge tolerance and SHDN-persistent LDO-unsuitable for adapter-input systems with transient risk or always-on monitoring needs. | Select only if cost sensitivity outweighs surge immunity and LDO continuity requirements. |
| TP4056 | No integrated LDO; 1A fixed CC only; no OVP beyond 7V; no ACOK/CHG status pins; 6V max input. | Requires external LDO, OVP, and status logic-increases BOM, layout complexity, and failure points in production. | Use only in ultra-low-cost, non-safety-critical applications where input is strictly regulated ≤5.5V. |
Compared with BQ24040DRCT and TP4056, MP2631DQ-LF-Z uniquely combines 28V surge resilience, SHDN-mode LDO persistence, and dual open-drain status outputs-enabling simpler, more robust, and smaller-footprint charging subsystems in USB-powered portable electronics.
Availability
MP2631DQ-LF-Z is available at Aetrix Electronics and suitable for smartphones, digital cameras, PDAs, and MP3 players requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant packaging.
Supply support for MP2631DQ-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 core expertise in DC/DC converters, battery management, and motor drivers.
The MP2631 belongs to MPS's linear battery charger product line, designed specifically for space-constrained portable devices needing integrated surge protection, precise Li-ion regulation, and auxiliary LDO functionality in a single QFN package.
FAQ
What is the maximum allowable input voltage for continuous operation?
The MP2631DQ-LF-Z operates continuously within 3.5V to 5.5V input range. While its absolute maximum rating is 28V for transient surge protection, sustained input above 7.0V triggers OVP and disconnects both charger and LDO. Operation above 5.5V is not recommended for reliability and thermal performance.
How does the LDO behave when the SHDN pin is asserted?
When SHDN is driven high, the charger is disabled but the LDO remains active as long as VIN is between 3V and 7V. This allows continuous 5V supply to monitoring circuits (e.g., fuel gauge, RTC) without requiring a second regulator, simplifying power architecture in battery-backed systems.
Can the MP2631DQ-LF-Z charge a deeply discharged battery?
Yes-it initiates trickle charge at 10% of the programmed ICHG (e.g., 50mA for 500mA setting) when VBATT falls below 2.6V, rising to full CC once VBATT reaches 2.6V. Trickle mode prevents lithium plating and enables safe recovery of batteries down to 2.3V.
What is the purpose of the SS/NC pin, and how should it be used?
The SS/NC pin controls soft-start behavior. Leaving it open enables internal fixed soft-start, preventing inrush current during initial charge. Connecting an external capacitor (e.g., 100nF) adds programmable ramp time-critical for avoiding input voltage droop in weak USB sources or shared power rails.
Does the MP2631DQ-LF-Z support automatic recharge, and at what voltage threshold?
Yes-the device automatically reinitiates charging when VBATT drops to 4.0V (typical), with 100mV hysteresis. This ensures battery voltage is maintained near full capacity during intermittent usage, extending usable runtime in always-on portable devices like smartwatches or Bluetooth headsets.
How is battery voltage regulation accuracy affected by temperature?
Battery voltage regulation maintains ±0.75% accuracy over –5°C to +75°C ambient, corresponding to ±31.5mV deviation from 4.20V nominal. This stability is achieved via on-chip trimming and is confirmed in the Electrical Characteristics table under "VBATT" parameter.
What thermal management considerations apply to the QFN package?
The 3mm × 3mm QFN package requires connection of the exposed thermal pad (pin 5) to a minimum 100mm² copper pour on the PCB for effective heat dissipation. Without proper thermal land, junction temperature may exceed 120°C under 1A charge current at 5.5V input, triggering soft thermal shutdown.
MP2631DQ-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- -
- Charge Current - Max:
- 1A
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 5.5V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP2631DQ-LF-Z FAQ
1.How can I place an order for MP2631DQ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2631DQ-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 MP2631DQ-LF-Z reliable?
The price and inventory of MP2631DQ-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 MP2631DQ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2631DQ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2631DQ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2631DQ-LF-Z?
MP2631DQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2631DQ-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 MP2631DQ-LF-Z?
For technical support, including MP2631DQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2631DQ-LF-Z requirements.
6.How does Aetrix verify that MP2631DQ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2631DQ-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 MP2631DQ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2631DQ-LF-Z?
All MP2631DQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2631DQ-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 MP2631DQ-LF-Z part is unused and in its original packaging.
Return procedure for MP2631DQ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2631DQ-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
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…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
