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Monolithic Power Systems Inc. MP2612ER-LF-Z
- Part No.:
- MP2612ER-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Chargers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
MP2612ER-LF-Z.pdf
- Description:
- IC BATT CHG LI-ION 2-3CELL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,764
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Product details
Overview
MP2612ER-LF-Z from Monolithic Power Systems is a monolithic synchronous switching Li-ion battery charger IC supporting 2- or 3-cell series packs, featuring integrated 0.2 Ω power MOSFET, 600 kHz fixed-frequency current-mode control, ±0.75% battery voltage regulation accuracy, and programmable 2 A charge current via external sense resistor. It delivers up to 90% efficiency in distributed power systems and portable electronics requiring fast, safe charging with thermal and NTC-based temperature protection.
For engineers reviewing the MP2612ER-LF-Z datasheet, MP2612ER-LF-Z pinout, MP2612ER-LF-Z application, or MP2612ER-LF-Z equivalent, key selection considerations include its dual-cell/3-cell configuration select (via CELLS pin), TMR-programmable charge timeout, open-drain CHGOK/ACOK status outputs, and built-in VREF33/VREF25 reference rails for system biasing.
Technical Context
The MP2612ER-LF-Z implements peak current-mode control with dual independent regulation loops: COMPI governs constant-current (CC) phase by regulating sensed battery current through CSP–BATT, while COMPV manages constant-voltage (CV) phase by controlling battery terminal voltage with ±0.75% accuracy. Its 600 kHz oscillator enables compact magnetics and low output ripple without compromising loop stability.
It integrates two internal LDOs - VREF33 (3.3 V, 50 mA capable) and VREF25 (2.5 V, no load) - and supports battery temperature monitoring via an NTC window comparator referenced to VREF33, with preset thresholds at 73% and 30% of VREF33 for cold/hot detection. The CELLS pin selects cell count (ground = 2-cell, VREF33 = 3-cell), directly configuring CV threshold and charge termination logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9 V to 24 V - supports wide-input industrial and adapter-powered applications without pre-regulation |
| Charge Current | Up to 2 A programmable - set precisely via external sense resistor (e.g., 100 mΩ yields 2 A per 200 mV drop) |
| Battery Voltage Accuracy | ±0.75% - ensures tight CV regulation critical for Li-ion cell longevity and safety compliance |
| Switching Frequency | Fixed 600 kHz - enables use of small 4.7 µH inductors and reduces EMI filtering burden |
| Internal MOSFET RDS(on) | 0.2 Ω - minimizes conduction loss and eliminates need for external high-side switch |
| Thermal Shutdown | 150 °C - protects die during overload or poor PCB thermal design; recovers at ≤130 °C |
| NTC Monitoring | Voltage window comparator - detects battery temperature via resistive divider to VREF33; halts charge outside safe range |
Pinout & Package
MP2612ER-LF-Z is housed in a thermally enhanced 4 mm × 4 mm 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 NTC | NTC thermistor input | Connects to thermistor-to-GND divider; monitors battery temperature using internal 73%/30% VREF33 window |
| 2 ACOK | Input supply valid indicator | Open-drain output pulled low when VIN > VBATT + 300 mV and above UVLO threshold |
| 3 CHGOK | Charging status indicator | Open-drain output pulled low during active charge; floats high at termination or fault |
| 4 VREF33 | 3.3 V reference output | Stable 3.3 V rail (50 mA max); powers external circuitry and sets NTC/CELLS bias points |
| 6 EN | Enable control input | Active-high logic; <0.4 V disables device, >1.8 V enables operation with 4 µA input current |
| 7 CELLS | Cell count configuration | Ground = 2-cell (8.4 V CV), VREF33 = 3-cell (12.6 V CV); must not float |
| 10 BATT | Battery positive terminal | Main battery connection point; senses final regulated voltage and provides current path |
| 11 CSP | Current sense positive | High-side current sense input; used with RS1 to program CC level (200 mV full-scale) |
| 12 GND | Power and signal ground | Primary reference node; requires dedicated low-impedance layout path outside switching loop |
| 13 TMR | Charge timer capacitor | 0.1 µA current charges CTMR; sets trickle timeout (30 min) and total charge limit (3 hr) |
| 14 BST | Bootstrap supply | Connects to SW–BST capacitor; generates gate drive voltage >VIN for internal high-side MOSFET |
| 15 SW | Switch node | Drives external inductor; carries high di/dt switching current; requires short, wide trace |
| 16 VIN | Input supply | 9–24 V unregulated input; requires local 4.7 µF ceramic decoupling to suppress transients |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.2 Ω power switch | Eliminates external MOSFET and associated gate-drive complexity; reduces BOM count and board area |
| Programmable 2-cell/3-cell support | Single-pin (CELLS) configuration enables flexible pack compatibility without redesign |
| Preconditioning for dead batteries | Trickle-charge mode (10% ICC) activates below 2.8 V/cell to safely recover deeply discharged cells |
| Dual-loop CC/CV regulation | Independent COMPI and COMPV compensation networks ensure stable, accurate transition between charge phases |
| Comprehensive fault protection | Cycle-by-cycle overcurrent, thermal shutdown, NTC fault, timer timeout, and UVLO prevent unsafe operation |
Applications
| Smartphones | Netbooks |
|---|---|
Use Scenario: Fast-charging 2-cell Li-ion battery in slim-profile handheld devices with limited PCB space and thermal headroom. IC Role / Device Role / Timing Role: Primary switching charger managing CC/CV profile, NTC-based thermal safety, and CHGOK-driven system firmware state transitions. Use Value: Enables 2 A charge rate within JEDEC thermal limits using only 4.7 µH inductor and 100 mΩ sense resistor, reducing solution size by >30% vs. discrete alternatives. | Use Scenario: Dual-input (adapter + battery) power management in portable computing platforms requiring seamless switchover and runtime extension. IC Role / Device Role / Timing Role: Core battery charger interfaced with MP8110 for power path management; regulates charge current dynamically based on system load demand. Use Value: Delivers priority to system load (VSYS) while maintaining battery health via real-time current sharing - no external OR-ing FET required. |
| Distributed Power Systems | Industrial Portable Test Equipment |
Use Scenario: Standalone 24 V-input battery backup module for remote sensors or edge controllers operating in variable ambient temperatures. IC Role / Device Role / Timing Role: Autonomous charger with programmable TMR timeout and NTC window monitoring; operates without host MCU intervention. Use Value: Guarantees safe charging across –20 °C to +85 °C ambient via factory-trimmed references and robust thermal foldback. | Use Scenario: Ruggedized handheld test instrument powered by hot-swappable 3-cell Li-ion packs requiring field-replaceable battery management. IC Role / Device Role / Timing Role: High-accuracy CV regulator (±0.75%) with precise termination threshold (5–15% ICC) to maximize cycle life under intermittent usage. Use Value: Extends battery service life beyond 500 cycles by preventing overvoltage stress and enabling adaptive recharge at 4.0 V/cell. |
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 |
|---|---|---|---|
| BQ24610RGER | External N-channel MOSFET required; 1.5 A max charge current; adjustable switching frequency (100–1000 kHz) | Lacks integrated power switch and VREF33 rail; requires more external components for biasing and sensing | Select when frequency tuning or higher voltage tolerance (>28 V) is needed; accept added layout complexity |
| LT3652EMSE#TRPBF | 40 V absolute max input; 2 A charge current; 2 MHz switching; no integrated NTC interface | Requires external thermistor circuit and separate reference; optimized for high-VIN solar/battery hybrid systems | Choose for >24 V input sources or where ultra-fast 2 MHz switching justifies missing NTC integration |
Compared with BQ24610RGER and LT3652EMSE#TRPBF, MP2612ER-LF-Z uniquely combines integrated 0.2 Ω MOSFET, factory-trimmed ±0.75% CV accuracy, and direct NTC window monitoring - reducing component count by ≥40% and eliminating calibration overhead in 9–24 V, 2–3 cell applications.
Availability
MP2612ER-LF-Z is available at Aetrix Electronics and suitable for smartphones, netbooks, distributed power systems, and industrial portable test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2612ER-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 solutions.
The MP2612 belongs to MPS's battery charger IC product line, designed specifically for high-efficiency, single-chip switching charge solutions targeting space-constrained, thermally sensitive portable and industrial applications with 2–3 cell Li-ion packs.
FAQ
What is the minimum input voltage required for 2-cell versus 3-cell operation?
The MP2612ER-LF-Z requires VIN ≥ 9 V for 2-cell operation (VBATT ≈ 8.4 V) and VIN ≥ 13.5 V for reliable 3-cell operation (VBATT ≈ 12.6 V), due to the 180 mV reverse-blocking headroom requirement (VIN – VBATT). Below these thresholds, regulation degrades or ceases.
How does the TMR pin determine charge timeout duration?
The TMR pin draws a precise 0.1 µA current to charge/discharge an external capacitor. With CTMR = 0.1 µF, trickle mode lasts 30 minutes and total charge time is 3 hours. Timeout scales linearly: doubling CTMR doubles both intervals.
Can VREF25 be used to power external circuitry?
No. VREF25 is a dedicated 2.5 V reference for internal comparators only. It must remain floating with no capacitive or resistive load - connecting any external component violates datasheet specifications and risks regulation instability.
What happens if the CELLS pin is left unconnected?
Leaving CELLS floating causes undefined behavior: CV threshold may drift, termination logic fails, and charging can become unsafe. The datasheet explicitly mandates grounding for 2-cell or tying to VREF33 for 3-cell - no pull-up/down resistors are permitted.
Is the MP2612ER-LF-Z compatible with power path management architectures?
Yes - it interfaces directly with the MP8110 current-sense amplifier to implement dynamic power path management. MP8110 feeds system current feedback into MP2612's COMPI loop, enabling automatic charge current reduction as VSYS load increases - prioritizing system power over battery charging.
Does the internal MOSFET support synchronous rectification?
No. The MP2612ER-LF-Z uses an internal N-channel MOSFET for the high-side switch only. External Schottky diode D2 (as shown in Figure 1) provides low-loss freewheeling path; synchronous rectification is not implemented or supported.
How is battery temperature fault recovery handled?
When NTC voltage falls outside the 30–73% VREF33 window, charging halts immediately and CHGOK goes high. Recovery occurs automatically once the NTC voltage re-enters the window - no reset or EN toggle is required, enabling fully autonomous thermal management.
MP2612ER-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:
- Not For New Designs
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 2 ~ 3
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- Over Current, Over Voltage
- Charge Current - Max:
- 2A
- Battery Pack Voltage:
- 12.6V
- Voltage - Supply (Max):
- 24V
- Interface:
- -
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
MP2612ER-LF-Z FAQ
1.How can I place an order for MP2612ER-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2612ER-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 MP2612ER-LF-Z reliable?
The price and inventory of MP2612ER-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 MP2612ER-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2612ER-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2612ER-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2612ER-LF-Z?
MP2612ER-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2612ER-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 MP2612ER-LF-Z?
For technical support, including MP2612ER-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2612ER-LF-Z requirements.
6.How does Aetrix verify that MP2612ER-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2612ER-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 MP2612ER-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2612ER-LF-Z?
All MP2612ER-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2612ER-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 MP2612ER-LF-Z part is unused and in its original packaging.
Return procedure for MP2612ER-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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