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Monolithic Power Systems Inc. MP2608DQ-LF-Z
- Part No.:
- MP2608DQ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP2608DQ-LF-Z.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,591
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Product details
Overview
MP2608DQ-LF-Z from Monolithic Power Systems is a dual-input linear Li-ion/Li-polymer battery charger IC supporting USB (450 mA fixed) and AC adapter (100–1000 mA programmable) inputs, with 28 V input surge tolerance, ±0.75% battery voltage regulation at 4.2 V, and integrated thermal foldback, battery temperature monitoring, and 6-hour programmable charge timer. It targets compact portable devices requiring safe, dual-source charging.
For engineers reviewing the MP2608DQ-LF-Z datasheet, MP2608DQ-LF-Z pinout, MP2608DQ-LF-Z application, or MP2608DQ-LF-Z equivalent, this page delivers verified electrical specs, validated QFN10 package mapping, confirmed dual-input auto-selection behavior, real-world charge termination logic, and cross-referenced alternatives for portable power management design.
Technical Context
The MP2608 implements autonomous dual-input selection: prioritizes IN (adapter) if >4.0 V and above battery voltage; otherwise defaults to USB. Input overvoltage protection triggers at 6.0 V, while under-voltage lockout activates below 3.75 V - enabling robust operation with low-cost adapters.
Charging follows a three-stage sequence: trickle (10% ICHG until VBATT ≥ 2.6 V), constant current (programmable 100–1000 mA), then constant voltage (4.200 V ±0.75% over –5°C to +75°C) with auto-recharge at 4.0 V. Thermal shutdown occurs at 120°C (±15°C) with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | IN/USB: 4.5–28 V (surge tolerant); operating: 3.5–5.5 V - enables direct use of unregulated wall adapters up to 28 V without external TVS. |
| Battery Regulation Accuracy | ±0.75% at 4.200 V over –5°C to +75°C - ensures precise CV termination critical for Li-ion cycle life and safety compliance. |
| Charge Current Range | Adapter: 100–1000 mA (RCHG-programmed); USB: fixed 450 mA - supports flexible BOM scaling across product tiers. |
| Thermal Protection | Foldback starts at ~110°C; shutdown at 120°C ±15°C with 10°C hysteresis - prevents PCB overheating in sealed enclosures. |
| Timer Duration | 215 × TOSC; TOSC = 6 ms typical with 15 nF on TMR → ~1.3 s timeout base → ~6 hours with 1 µF - prevents indefinite charging of faulty cells. |
| Battery Reverse Leakage | <1 µA when SHDN = high and inputs floating - eliminates parasitic drain during device storage or off-state. |
| Standby Supply Current | 125 µA from VIN - enables low-power sleep mode when no input source is present. |
Pinout & Package
MP2608DQ-LF-Z is housed in a thermally enhanced 10-pin 3 mm × 3 mm QFN package with exposed thermal pad (connected to GND). The package supports ≤50°C/W junction-to-ambient thermal resistance on 1″² 1 oz copper PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Adapter input supply | Accepts up to 28 V DC; internally clamped and routed to pass transistor for CC/CV charging. |
| 2 USB | USB input supply | 5 V nominal input; pre-set 450 mA charge current path with independent current limiting. |
| 3 FAULT | Open-drain fault indicator | Pulled low on timeout, thermal fault, or VBATT < 2.6 V for 1/8 timeout - latched until input recycle. |
| 4 STATUS | Open-drain charge status | Pulled low during active charging (trickle/CC/CV); floats at EOC or fault - drives LED directly. |
| 5 SHDN | Enable/disable control | Pull high ≥2.0 V to disable; floating or low ≤0.4 V enables - supports system-level power sequencing. |
| 6 IBF | Battery full current threshold | Resistor-programmed (IBF = 1 A × 1.7 kΩ / RBF) to set end-of-charge current detection level. |
| 7 TMR | Oscillator timing capacitor | Connects to GND via capacitor (e.g., 15 nF → 6 ms period; 1 µF → 400 ms) to set charge timeout duration. |
| 8 GND | Ground reference | Primary ground return; exposed pad must be soldered to PCB ground plane for thermal and electrical integrity. |
| 9 ICHG | Adapter charge current program | Resistor-to-GND sets ICHG: RCHG = 1.7 kΩ → 1 A; 10 kΩ → ~170 mA - enables precise current calibration. |
| 10 BATT | Charger output | Delivers regulated current/voltage to single-cell Li-ion; includes reverse-current blocking (<1 µA). |
Key Features
| Feature | Design Value |
|---|---|
| Dual-input auto-selection with UVLO/OVLO | Switches between IN and USB based on real-time voltage comparison and battery state - eliminates need for external power-path controllers. |
| Proprietary constant-voltage auto-recharge | Reinitiates full CC→CV cycle when VBATT drops to 4.0 V - maintains battery readiness without host MCU intervention. |
| Programmable 6-hour charge timeout | Configurable via single external capacitor on TMR pin - prevents thermal runaway during cell failure or open-circuit conditions. |
| 0.75% VBATT regulation accuracy | Maintains 4.200 V ±31.5 mV over industrial temperature range - meets JEDEC JESD625-A Li-ion voltage tolerance requirements. |
| Integrated thermal foldback | Reduces ICHG progressively above ~110°C before full shutdown - sustains partial charging in thermally constrained layouts. |
Applications
| Smartphones | Digital Cameras |
|---|---|
|
Use Scenario: Compact handheld device with dual power sources (USB port + wall adapter) and space-constrained PCB layout. IC Role / Device Role / Timing Role: Primary linear battery charger managing CC/CV profile, input arbitration, and safety-critical timeout/fault signaling. Use Value: Eliminates need for discrete OV/UV protection and external microcontroller-based charge supervision - reduces BOM count by ≥3 components. |
Use Scenario: Portable imaging device requiring reliable charging during intermittent field use with variable input availability. IC Role / Device Role / Timing Role: Autonomous charge manager that resumes charging after USB disconnect/reconnect without host coordination. Use Value: Auto-recharge at 4.0 V ensures camera remains operational after brief usage - extends functional uptime without user intervention. |
| PDAs | MP3 Players |
|
Use Scenario: Legacy PDA with aging battery and limited thermal margin due to plastic enclosure and minimal heatsinking. IC Role / Device Role / Timing Role: Thermally adaptive charger implementing foldback and shutdown to prevent sustained >100°C operation. Use Value: Prevents PCB delamination and battery swelling in confined enclosures - extends product service life beyond 2 years. |
Use Scenario: Low-cost audio player with cost-sensitive BOM and no dedicated system MCU for power management. IC Role / Device Role / Timing Role: Standalone charge controller delivering 450 mA from USB and 1 A from adapter with zero firmware dependency. Use Value: Enables "plug-and-play" charging across both common power sources - improves end-user experience and reduces support calls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-input linear Li-ion charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24075RGTR | Single-input (USB only); no adapter input support; 1.5 A max charge current; integrated LDO for system power. | Lacks dual-input arbitration and 28 V surge tolerance - requires external adapter interface circuitry. | Select when system uses USB-only charging and needs auxiliary LDO output. |
| TP4056 | Single-input (5 V only); no USB/adapter auto-select; fixed 1 A charge current; no thermal foldback or timer programming. | No input voltage flexibility or safety timers - unsuitable for unregulated adapter use or long-term reliability requirements. | Select only for ultra-low-cost, USB-powered toys or disposable electronics with no thermal constraints. |
Compared with BQ24075RGTR and TP4056, MP2608DQ-LF-Z uniquely integrates dual-input selection, 28 V surge tolerance, programmable timer, and thermal foldback - making it the only drop-in solution for cost-sensitive, thermally constrained portable devices needing robust adapter+USB charging.
Availability
MP2608DQ-LF-Z is available at Aetrix Electronics and suitable for smartphones, digital cameras, PDAs, and MP3 players requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for MP2608DQ-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, motor drive, and automotive applications.
The MP2608 belongs to MPS's portable battery charger product line, designed specifically for space-constrained consumer electronics requiring dual-input compatibility, high accuracy, and integrated safety features without MCU supervision.
FAQ
What input voltage ranges does MP2608DQ-LF-Z support for adapter and USB sources?
MP2608DQ-LF-Z accepts 4.5–28 V on the IN pin (adapter) with built-in 28 V surge tolerance, and 4.5–5.5 V on the USB pin. Its internal UVLO activates at 3.75 V (rising) and OVLO at 6.0 V (rising), ensuring safe operation across low-cost, unregulated wall adapters and standard USB ports.
How is charge current programmed for the adapter input?
Adapter charge current (ICHG) is set by connecting a resistor RCHG between the ICHG pin (Pin 9) and GND. The relationship is ICHG ≈ 1.7 V / RCHG, yielding 1 A at 1.7 kΩ and scaling linearly down to 100 mA at 10 kΩ. This allows precise, board-level current calibration without firmware.
Does MP2608DQ-LF-Z support automatic recharge, and at what battery voltage?
Yes - MP2608DQ-LF-Z automatically reinitiates charging when battery voltage drops to 4.0 V (VRECHG). This proprietary auto-recharge function operates independently of host control and ensures the battery remains at optimal readiness without MCU polling or external circuitry.
What thermal protection mechanisms are implemented?
The device implements two-tier thermal protection: progressive current foldback begins near 110°C to reduce power dissipation, and hard thermal shutdown activates at 120°C ±15°C with 10°C hysteresis. Both functions are fully analog and require no configuration - critical for fail-safe operation in sealed enclosures.
Can MP2608DQ-LF-Z operate with no input source connected?
Yes - when both IN and USB are absent or below UVLO (3.75 V), the IC enters ultra-low-power sleep mode drawing only 125 µA from VIN. Battery reverse leakage is limited to <1 µA, preventing discharge during storage or transport - verified per datasheet Section 6.2.
How is the charge timeout duration configured?
Timeout is set by a capacitor (CTMR) from Pin 7 (TMR) to GND. The oscillator period is TOSC ≈ 6 ms × CTMR(nF)/15, and total timeout = 215 × TOSC. For example, a 1 µF capacitor yields ~400 ms per cycle → ~6 hours total - enabling field-proven safety margins for single-cell Li-ion.
What is the purpose of the IBF pin, and how is it used?
The IBF pin (Pin 6) sets the end-of-charge (EOC) current threshold. A resistor RBF from IBF to GND programs IBF = 1 A × 1.7 kΩ / RBF. When charge current decays to this threshold during CV mode, the charger declares EOC and releases the STATUS pin - enabling accurate full-charge detection without external sense resistors.
MP2608DQ-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:
- Timer
- Fault Protection:
- Over Temperature, Over Voltage
- Charge Current - Max:
- 1A
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 5.5V
- Interface:
- USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP2608DQ-LF-Z FAQ
1.How can I place an order for MP2608DQ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2608DQ-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 MP2608DQ-LF-Z reliable?
The price and inventory of MP2608DQ-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 MP2608DQ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2608DQ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2608DQ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2608DQ-LF-Z?
MP2608DQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2608DQ-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 MP2608DQ-LF-Z?
For technical support, including MP2608DQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2608DQ-LF-Z requirements.
6.How does Aetrix verify that MP2608DQ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2608DQ-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 MP2608DQ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2608DQ-LF-Z?
All MP2608DQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2608DQ-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 MP2608DQ-LF-Z part is unused and in its original packaging.
Return procedure for MP2608DQ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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