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Monolithic Power Systems Inc. MP2619EV-LF-Z
- Part No.:
- MP2619EV-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Chargers
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
MP2619EV-LF-Z.pdf
- Description:
- IC BATT CHG LI-ION 2-3CELL 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,643
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Product details
Overview
MP2619EV-LF-Z from Monolithic Power Systems is a 2–3 cell Li-ion switching battery charger IC with integrated 0.2Ω power MOSFET, 2A programmable charge current, 600kHz fixed-frequency current-mode control, and system power path management. It regulates battery voltage to ±0.75% accuracy and supports automatic current sharing between charging and system load in portable netbooks and distributed power systems.
For engineers reviewing the MP2619EV-LF-Z datasheet, MP2619EV-LF-Z pinout, MP2619EV-LF-Z application, or MP2619EV-LF-Z equivalent, this device delivers verified power path operation, NTC-based thermal protection, programmable charge timer, and dual-loop CC/CV regulation - all in a QFN-28 (4mm × 5mm) package with validated 28-pin terminal mapping.
Technical Context
The MP2619EV-LF-Z implements peak current-mode control with 600kHz oscillator and slope compensation for stable loop response. Its dual feedback architecture uses COMPI for constant-current regulation via RS1 sense resistor and COMPV for constant-voltage regulation at battery terminals.
Power path management operates by sensing system current through OUT1, RG1/RG2, and RS2, enabling real-time charge current reduction as system load increases - down to zero - while maintaining uninterrupted VSYS supply from either VIN or battery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5V to 24V - supports wide-input adapters including 12V/19V/24V industrial and computing supplies. |
| Charge Current | Up to 2A programmable - set precisely via external RS1 sense resistor (e.g., 110mΩ for 2A in power-path mode). |
| Battery Voltage Accuracy | ±0.75% - ensures tight CV regulation for 2-cell (8.4V) or 3-cell (12.6V) Li-ion packs. |
| Switching Frequency | Fixed 600kHz - enables compact magnetics and predictable EMI filtering without frequency jitter. |
| Internal MOSFET RDS(on) | 0.2Ω - reduces conduction loss and thermal stress during high-current charging. |
| Power Path Current Sharing | Real-time dynamic allocation - prioritizes system load over charging current, preventing brownout during simultaneous high-load operation. |
| NTC Monitoring Window | 0°C to 50°C (with NCP18X103 thermistor) - halts charging outside safe battery temperature range using internal 73%/30% VREF33 thresholds. |
| Charge Timer | Programmable via TMR capacitor - 30 min trickle timeout, 3-hour total charge limit - prevents overcharge in fault conditions. |
Pinout & Package
MP2619EV-LF-Z is housed in a thermally enhanced 28-pin QFN package (4mm × 5mm, 0.5mm pitch) with exposed thermal pad. Pin 11 and Pin 21 are GND connections; the exposed pad must be soldered to PCB ground plane for optimal thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,6,10,12,22 | No Connection | Unbonded die pads - must remain floating; no routing or soldering required. |
| 2 | NTC Input | Connects to thermistor divider network - enables battery temperature monitoring with hysteresis-based shutdown. |
| 3 | ACOK Output | Open-drain indicator - low when valid input supply (VIN > VBATT + 300mV and above UVLO). |
| 4 | CHGOK Output | Open-drain status - low during active charging; high-impedance at end-of-charge or fault. |
| 5 | VREF33 Output | 3.3V reference - powers external circuitry up to 30mA; requires 1µF ceramic bypass to GND. |
| 7 | EN Input | Active-high enable - logic high (>1.8V) activates charger; low disables all blocks except battery monitor. |
| 8 | SHDN Input | Shutdown control for current sense amplifier - tie to GND for normal operation. |
| 9,14 | RG1 / RG2 | Current sense gain resistors - set gain for system current sensing (OUT1) in power path mode. |
| 11,21 | GND / Exposed Pad | Main signal and thermal reference - critical for low-noise current sensing; connect exposed pad to solid ground plane. |
| 13 | OUT1 Output | System current sense output - drives external resistor (RS2) to generate feedback for current sharing. |
| 15 | VCC | Current sense amplifier supply - decoupled internally; not user-accessible for external bias. |
| 16,18 | COMPV / COMPI | CV and CC loop compensation pins - require RC networks for stability per application design. |
| 17 | CELLS | Cell count selection - float or tie to VREF33 for 3-cell; ground for 2-cell configuration. |
| 19 | BATT | Positive battery terminal - connects directly to pack anode; carries full charge current. |
| 20 | CSP | Current sense positive - forms differential pair with BATT across RS1 for accurate ICC measurement. |
| 23 | TMR | Charge timer capacitor node - 0.1µA current charges/discharges external cap (e.g., 0.1µF = 3h total). |
| 24 | BST | Bootstrap supply - forms floating gate drive for internal high-side switch via SW–BST capacitor. |
| 25,26 | SW | Switch node - connects to inductor and external diode; switches at 600kHz with 90% max duty cycle. |
| 27 | PIN | Main input supply - accepts 5.5–24V unregulated input; requires ≥10µF input capacitance. |
| 28 | AIN | Controller supply - internal LDO input; must meet UVLO threshold (3.2V typ) for startup. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.2Ω Power MOSFET | Eliminates external high-side switch, reducing BOM count and PCB area while maintaining >90% efficiency at 2A. |
| Power Path Management with Current Sharing | Enables seamless transition between adapter and battery power while dynamically scaling charge current to preserve system runtime. |
| ±0.75% Battery Voltage Regulation | Meets JEITA-compliant CV accuracy for 2/3-cell Li-ion, minimizing capacity loss and extending cycle life. |
| Programmable Trickle-to-CV Charge Sequence | Starts at 10% ICC until 3.0V/cell, then transitions to CC (2A), then CV (8.4V/12.6V) with 5% termination threshold. |
| NTC-Based Thermal Protection | Detects battery temperature via external thermistor; halts charging if outside 0°C–50°C window (NCP18X103 calibrated). |
| Open-Drain Status Outputs (CHGOK/ACOK) | Provides direct microcontroller interface for state machine control without level-shifting or pull-up dependencies. |
Applications
| Netbook PC Power Management | Distributed Power System Charger |
|---|---|
Use Scenario: Dual-power netbook with AC adapter and removable 2-cell Li-ion battery requiring uninterrupted operation during hot-swap. IC Role / Device Role / Timing Role: Primary switching charger with power path arbitration - manages VIN-to-VSYS priority, battery charging, and thermal safety. Use Value: Enables instant failover to battery without system reset; maintains 2A fast-charge capability while supporting 1.2A system load simultaneously. | Use Scenario: Industrial edge gateway with 24V input, 3-cell backup battery, and variable system load (radio, sensor, MCU). IC Role / Device Role / Timing Role: Standalone battery management unit - performs CC/CV charge, NTC monitoring, and adaptive current sharing under fluctuating loads. Use Value: Guarantees >90% efficiency at 1.5A load + 0.5A charge; eliminates need for secondary DC-DC converter in backup path. |
| 2-Cell Li-ion Portable Instrument | Pre-regulator for Linear Regulators |
Use Scenario: Handheld test equipment powered by 2-cell Li-ion with strict thermal limits and USB-C input compatibility. IC Role / Device Role / Timing Role: High-accuracy battery charger with dead-battery recovery - initiates trickle charge at <3.0V/cell and enforces 30-min timeout. Use Value: Recovers deeply discharged batteries safely; ±0.75% VBATT accuracy prevents overvoltage stress on sensitive analog front-end circuits. | Use Scenario: Low-noise medical sensor module requiring clean 3.3V rail derived from 2-cell battery, with minimal ripple. IC Role / Device Role / Timing Role: Pre-regulating buck charger - delivers regulated 8.4V intermediate bus to downstream LDOs, reducing dropout and heat. Use Value: Reduces LDO thermal load by 65% vs. direct 2-cell-to-3.3V conversion; leverages MP2619's 600kHz switching for compact filter design. |
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 |
|---|---|---|---|
| BQ24725ARHBT | Requires external MOSFETs; supports SMBus control; higher quiescent current (120µA vs. 2mA). | Targeted at server/enterprise battery packs with host microcontroller coordination. | Select for systems needing digital telemetry or multi-bank parallel charging - not for cost-sensitive standalone designs. |
| ISL9238HRZ-T | Higher input voltage (36V); includes integrated ADC and I²C interface; no built-in NTC comparator. | Designed for automotive infotainment with CAN bus integration and AEC-Q100 qualification. | Choose only if AEC-Q100 compliance or 36V input headroom is mandatory - adds complexity and cost for consumer-grade applications. |
Compared with BQ24725ARHBT and ISL9238HRZ-T, MP2619EV-LF-Z offers lower BOM cost via integrated MOSFET, simpler analog configuration, and dedicated NTC hardware - making it optimal for space-constrained, thermally sensitive portable electronics where digital control is unnecessary.
Availability
MP2619EV-LF-Z is available at Aetrix Electronics and suitable for netbook PC power management, distributed power system chargers, 2-cell portable instrumentation, and pre-regulator applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2619EV-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 conversion, battery management, and motor control.
The MP2619 belongs to MPS's Li-ion switching charger product line, designed specifically for portable computing and industrial backup systems requiring integrated power path, high accuracy, and robust thermal safety - not general-purpose charging.
FAQ
What is the maximum supported battery configuration for MP2619EV-LF-Z?
The MP2619EV-LF-Z supports exactly two or three series-connected Li-ion cells. Configuration is selected via the CELLS pin: grounded for 2-cell (VBATT = 7.2–8.4V), floating or tied to VREF33 for 3-cell (VBATT = 10.8–12.6V). It does not support 1-cell or 4-cell topologies.
How is charge current programmed in power path mode?
In power path mode, charge current is set by RS1 (e.g., 110mΩ for 2A) and calibrated using RGS1 (280Ω) and RS2 (20mΩ) per Equation (9) in the datasheet. The relationship RG1/RGS1 = RS1/RS2 ensures accurate current sharing between system load and battery charge paths.
Does MP2619EV-LF-Z require external compensation components?
Yes - both the constant-current (COMPI) and constant-voltage (COMPV) loops require external RC compensation networks. Typical values are 10kΩ + 1nF for COMPI and 47kΩ + 220pF for COMPV, but exact values depend on inductor, input/output capacitance, and load conditions per Section 9.2 of the datasheet.
Can MP2619EV-LF-Z operate without an NTC thermistor?
Yes - the NTC circuit is optional. Leaving the NTC pin open disables thermal monitoring, but all other functions (charging, power path, status outputs) remain fully operational. For safety-critical applications, MPS recommends connecting an NTC per Figure 8 in the datasheet.
What happens when system load exceeds input current capability?
When system load current exceeds available input current, MP2619EV-LF-Z reduces charge current linearly to zero. Once IBATT reaches zero, the system draws remaining power from the battery - ensuring continuous VSYS operation without interruption or brownout.
Is the VREF33 output capable of powering external circuitry?
Yes - VREF33 provides a stable 3.3V ±30mV reference with up to 30mA load capability. It must be bypassed with a minimum 1µF ceramic capacitor to GND. Exceeding 30mA risks reference droop and instability in both internal and external circuits.
How is thermal shutdown implemented and recovered?
Thermal shutdown triggers at TJ = 150°C (guaranteed by design), disabling switching and setting CHGOK/ACOK high. Recovery occurs automatically when junction temperature falls below 130°C (20°C hysteresis), resuming normal operation without external reset.
MP2619EV-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 28-VFQFN 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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (4x5)
MP2619EV-LF-Z FAQ
1.How can I place an order for MP2619EV-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2619EV-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 MP2619EV-LF-Z reliable?
The price and inventory of MP2619EV-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 MP2619EV-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2619EV-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2619EV-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2619EV-LF-Z?
MP2619EV-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2619EV-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 MP2619EV-LF-Z?
For technical support, including MP2619EV-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2619EV-LF-Z requirements.
6.How does Aetrix verify that MP2619EV-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2619EV-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 MP2619EV-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2619EV-LF-Z?
All MP2619EV-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2619EV-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 MP2619EV-LF-Z part is unused and in its original packaging.
Return procedure for MP2619EV-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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