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Monolithic Power Systems Inc. MP2117DQ-LF-P
- Part No.:
- MP2117DQ-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP2117DQ-LF-P.pdf
- Description:
- IC REG BUCK ADJ 2.2A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,570
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Product details
Overview
MP2117DQ-LF-P from Monolithic Power Systems is a 1.25MHz, 2.2A synchronous step-down DC/DC converter in a 10-pin 3mm×3mm QFN package. It delivers regulated output down to 0.6V from 2.5V–6V input, supports 100% duty cycle for low-dropout operation, and integrates high-side PFET (0.20Ω) and synchronous NFET (0.15Ω) switches-designed for Li+-powered portable instruments requiring compact, high-efficiency power conversion.
For engineers reviewing the MP2117DQ-LF-P datasheet, MP2117DQ-LF-P pinout, MP2117DQ-LF-P application, or MP2117DQ-LF-P equivalent, key selection considerations include its fixed 1.25MHz switching frequency, ±10% PWROK window with 50μs deglitch, thermal shutdown at 150°C, 1μA shutdown current, and compatibility with ceramic output capacitors without external compensation.
Technical Context
The MP2117DQ-LF-P implements peak-current-mode PWM control with internal slope compensation, enabling stable regulation across >50% duty cycles while preventing subharmonic oscillation. Its integrated power stage eliminates external diodes and supports full-cycle synchronous rectification.
It features a dedicated open-drain PWROK output that asserts HIGH only when VOUT remains within ±10% of the FB-set voltage for ≥50μs, and an EN pin with 0.3V–1.5V logic threshold enabling controlled startup and shutdown sequencing in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 1.25MHz - enables use of small 1–2.2μH inductors and reduces EMI filter size. |
| Continuous Output Current | 2.2A - supports portable instrumentation loads such as LCD bias rails and optical drive motors. |
| Input Voltage Range | 2.5V to 6V - matches single-cell Li+ battery discharge profile (4.2V–2.7V) with headroom for protection circuitry. |
| Feedback Reference Voltage | 0.596V (typ) - sets output via resistor divider; tolerance ±1.2% over –40°C to +85°C ensures tight regulation. |
| Shutdown Quiescent Current | 0.01–1μA - extends battery life during system sleep modes without external load switches. |
| Thermal Shutdown Threshold | 150°C with 20°C hysteresis - protects die under sustained overload or poor PCB thermal design. |
| PWROK Accuracy Window | ±10% of nominal VOUT with 50μs deglitch - prevents false resets during transient load steps in PDAs and DVD drives. |
Pinout & Package
MP2117DQ-LF-P is housed in a thermally enhanced 10-pin QFN (3mm × 3mm, 0.5mm pitch) with exposed thermal pad connected to GND. The package supports ≤2.5W continuous power dissipation at TA = +25°C (θJA = 50°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB) | Feedback Input | Connects to resistor divider midpoint; regulates output by comparing against 0.596V reference. |
| 2 (EN) | Enable Control | Active-high logic input; 0.3V–1.5V threshold allows direct MCU GPIO or RC-delayed startup. |
| 3 (IN) | Power Input | Accepts 2.5V–6V supply; requires local 10–22μF ceramic capacitor to suppress switching noise. |
| 4,5 (SW) | Switch Node | Drives external inductor; connects internally to PFET drain and NFET source - high dv/dt node requiring short PCB routing. |
| 6 (PGND) | Power Ground | Return path for synchronous rectifier and inductor current; must be tied directly to exposed thermal pad. |
| 7 (GND) | Analog Ground | Reference for FB, EN, and PWROK; separate from PGND but connected on PCB via low-impedance plane. |
| 9 (PWROK) | Power-Good Output | Open-drain signal pulled LOW during startup, fault, or shutdown; requires external pull-up to monitored rail. |
| 8,10 (N/C) | No Connection | Unbonded pins - must remain unconnected and unpopulated on PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PFET/NFET Power Stage | 0.20Ω / 0.15Ω RDS(on) - eliminates Schottky diode, enabling >90% efficiency at 2A and reducing BOM count. |
| Internal Compensation | Single-pole-zero network - removes need for external compensation components, simplifying layout and validation. |
| 100% Duty Cycle Operation | Enables dropout <100mV at 2.2A - extends runtime in Li+ systems when VIN drops near VOUT (e.g., 3.0V → 2.8V). |
| Cycle-by-Cycle Current Limit | 2.5–4.5A peak limit - protects internal MOSFETs during short-circuit or overload without latch-off. |
| Soft-Start and POR | Internally timed ~1ms ramp + power-on reset - prevents inrush current and ensures clean system boot in portable devices. |
Applications
| DVD+/-RW Drives | Portable Instruments |
|---|---|
Use Scenario: Powering laser diode bias and spindle motor drivers in slim-profile optical drives. IC Role / Device Role / Timing Role: Primary 1.8V/2.5V step-down regulator delivering up to 2.2A with fast transient response to motor commutation spikes. Use Value: 1.25MHz switching minimizes inductor size (<2mm height), while 100% duty cycle maintains regulation during battery sag below 3V. | Use Scenario: Supplying core logic and sensor interfaces in handheld test meters and data loggers. IC Role / Device Role / Timing Role: Main system PMIC providing stable 3.3V or 1.2V rails from single Li+ cell with ultra-low shutdown current. Use Value: 1μA shutdown current preserves battery charge during multi-week storage; PWROK enables MCU-controlled power sequencing. |
| LCD TV Backlight Drivers | PDAs |
Use Scenario: Generating intermediate 5V rail for LED driver ICs in small-format LCD panels. IC Role / Device Role / Timing Role: High-efficiency buck converter feeding constant-current LED controllers with minimal thermal footprint. Use Value: QFN package and 90% efficiency reduce board area and heat buildup behind thin bezels; thermal shutdown prevents damage during ambient temperature excursions. | Use Scenario: Regulating processor I/O and memory voltage in legacy PDA platforms with tight space constraints. IC Role / Device Role / Timing Role: Compact, self-contained DC/DC solution replacing discrete switcher designs with external FETs and controllers. Use Value: Integrated soft-start prevents brownout during wake-from-sleep; EN pin enables dynamic power gating per subsystem. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1605DJ-LF-Z | 1.5A rated, 2MHz switching, smaller 8-pin QFN (2mm×2mm), no PWROK output | Lacks power-good signaling; lower current rating limits use in motor-driven loads | Select when board space is critical and PWROK is not required; verify 1.5A margin suffices for peak load. |
| RT7295BGJ8F | 2A rated, 1.3MHz, includes light-load pulse-skipping mode, different EN threshold (1.25V min) | Higher light-load efficiency but requires revalidation of feedback loop stability with ceramic caps | Prefer for battery-operated systems needing extended idle time; confirm EN interface compatibility with host controller. |
Compared with MP2117DQ-LF-P, MP1605DJ-LF-Z trades current capability and PWROK for size and frequency, while RT7295BGJ8F improves light-load efficiency at the cost of loop tuning complexity and EN voltage compatibility.
Availability
MP2117DQ-LF-P is available at Aetrix Electronics and suitable for DVD+/-RW drives, portable instrumentation, and LCD TV backlight systems requiring stable component supply despite end-of-life status.
Supply support for MP2117DQ-LF-P 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 MP2117 belongs to MPS's high-frequency synchronous buck converter product line, engineered for space-constrained, battery-powered consumer and industrial equipment where efficiency, thermal performance, and integration are prioritized over programmability.
FAQ
What does "END OF LIFE, REFER TO MP1605" mean for MP2117DQ-LF-P?
MPS has discontinued the MP2117 series and recommends MP1605 as the functional successor. MP2117DQ-LF-P remains available through authorized distributors and Aetrix Electronics for legacy design support and last-time buys, but no new revisions or long-term supply commitments apply.
Can MP2117DQ-LF-P operate with input voltage below 2.5V?
No. The absolute minimum input voltage is 2.5V per the Recommended Operating Conditions table. Below this, undervoltage lockout activates, disabling the device. The 1.8V UVLO threshold is a turn-on hysteresis point-not an operational lower bound.
Is the exposed thermal pad on the QFN package electrically connected?
Yes. Pin 7 (GND) and the exposed pad share the same internal connection to chip ground. The pad must be soldered to a solid GND copper pour using ≥4 thermal vias to meet θJA = 50°C/W and prevent thermal shutdown at full load.
Does MP2117DQ-LF-P require external compensation components?
No. The device uses internal compensation optimized for ceramic output capacitors. Adding external compensation risks instability; the datasheet explicitly states "internally compensated" and validates stability with 22–47μF X5R/X7R ceramics and 1–2.2μH inductors.
How does the PWROK signal behave during startup and fault conditions?
PWROK remains LOW until VOUT reaches and sustains ±10% of the target for ≥50μs. It goes LOW again if VOUT drifts outside that window or EN is pulled low. During thermal shutdown or overcurrent, PWROK deasserts after the 50μs deglitch timer confirms the fault persists.
What is the maximum achievable output voltage with MP2117DQ-LF-P?
The maximum output voltage is limited to the input voltage minus conduction losses. With 6V input and 2.2A load, typical drop is ~300mV (due to 0.20Ω PFET + 0.15Ω NFET), yielding ~5.7V max. The FB divider can be configured for any value between 0.6V and 6V, but regulation requires VIN > VOUT + dropout.
Why does MP2117DQ-LF-P specify two different packages (QFN10 and SOIC8E) but the part number ends in "DQ"?
The "DQ" suffix specifically denotes the 10-pin QFN (3mm×3mm) variant. "DN" is used for the SOIC-8E version. MP2117DQ-LF-P is exclusively the QFN package; the SOIC variant is a separate orderable part (MP2117DN-LF-P) with different pinout, thermal performance, and layout requirements.
MP2117DQ-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 2.2A
- Frequency - Switching:
- 1.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP2117DQ-LF-P FAQ
1.How can I place an order for MP2117DQ-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2117DQ-LF-P 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 MP2117DQ-LF-P reliable?
The price and inventory of MP2117DQ-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2117DQ-LF-P is usually 5 days.
3.What payment methods are accepted for MP2117DQ-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2117DQ-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2117DQ-LF-P?
MP2117DQ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2117DQ-LF-P 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 MP2117DQ-LF-P?
For technical support, including MP2117DQ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2117DQ-LF-P requirements.
6.How does Aetrix verify that MP2117DQ-LF-P is sourced from the original manufacturer or authorized distributors?
All MP2117DQ-LF-P 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 MP2117DQ-LF-P meets industry standards.
7.What is the process for return or replacement of MP2117DQ-LF-P?
All MP2117DQ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2117DQ-LF-P, 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 MP2117DQ-LF-P part is unused and in its original packaging.
Return procedure for MP2117DQ-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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