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Monolithic Power Systems Inc. MP2117DQ-LF-Z
- Part No.:
- MP2117DQ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP2117DQ-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 2.2A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,559
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Product details
Overview
MP2117DQ-LF-Z 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 operates from 2.5V–6V input, regulates output down to 0.6V, supports 100% duty cycle for low-dropout battery operation, and integrates high-side PFET (0.20Ω) and synchronous NFET (0.15Ω) switches. It powers Li+-based portable instruments requiring compact, high-efficiency regulation.
For engineers reviewing the MP2117DQ-LF-Z datasheet, MP2117DQ-LF-Z pinout, MP2117DQ-LF-Z application, or MP2117DQ-LF-Z equivalent, key selection criteria include 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-Z implements peak-current-mode PWM control with internal slope compensation, enabling stable operation at duty cycles >50% and eliminating need for external loop compensation. Its integrated power stage includes matched PFET/NFET switches with on-resistances of 0.20Ω and 0.15Ω respectively, optimized for efficiency in 2.5V–6V input battery systems.
It features a dedicated open-drain PWROK output that asserts HIGH only when VOUT remains within ±10% of the FB-set regulation point for ≥50μs, and an EN pin with 0.3V–1.5V logic threshold. Shutdown current is specified at 0.01–1μA, supporting ultra-low-power system states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 1.25MHz - enables use of small 1.0–1.2μH inductors and reduces EMI filter size. |
| Continuous Output Current | 2.2A - supports high-current loads like LCD bias rails or PDA core supplies without external boost. |
| Input Voltage Range | 2.5V to 6V - matches single-cell Li+ (2.7–4.2V) with headroom for USB-powered or dual-battery backup. |
| Output Voltage Range | 0.6V to 6V - set via external resistor divider; 0.6V minimum enables modern low-voltage SoC core rails. |
| Feedback Reference Voltage | 0.596V ±12mV (25°C), ±18mV (–40°C to +85°C) - determines output accuracy and load regulation sensitivity. |
| Shutdown Current | 0.01–1μA - ensures negligible battery drain during system sleep modes. |
| PWROK Accuracy Window | ±10% around regulated VOUT with 50μs deglitch - prevents false resets during transient load steps. |
Pinout & Package
MP2117DQ-LF-Z is housed in a thermally enhanced 10-pin 3mm×3mm QFN package with exposed thermal pad connected to GND. Pin 7 (exposed pad) must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB) | Feedback Input | Connects to resistor divider midpoint; senses output voltage for regulation; 0.596V reference sets VOUT = 0.6V × (1 + R1/R2). |
| 2 (EN) | Enable Control | Active-high logic input; 0.3–1.5V threshold allows direct microcontroller GPIO or RC-delay startup sequencing. |
| 3 (IN) | Main Power Input | Accepts 2.5–6V supply; requires local 10–22μF ceramic capacitor between IN and PGND for noise suppression. |
| 4,5 (SW) | Switch Node | Drives external inductor; high dv/dt node-must be routed short and away from analog traces to avoid coupling. |
| 6 (PGND) | Power Ground Return | Low-impedance return path for synchronous rectifier current; separate from analog GND (Pin 7) to minimize noise injection. |
| 7 (GND) | Analog Ground | Reference for FB, EN, PWROK; connects to exposed thermal pad; must tie to PGND at single point near IC. |
| 9 (PWROK) | Power-Good Open Drain | Asserts HIGH only after VOUT stabilizes within ±10% for ≥50μs; pulls LOW during fault or shutdown. |
| 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) enables >90% efficiency at 2.2A without external diode or MOSFET drivers. |
| 100% Duty Cycle Operation | Extends usable battery life by maintaining regulation as VIN drops to VOUT + ILOAD × (RDS(on)_PFET + DCR_L). |
| Internal Compensation | Eliminates external Type-II/III compensation network-reduces BOM count and layout sensitivity. |
| Cycle-by-Cycle Current Limit | PFET peak limit of 2.5–4.5A protects against overload and short-circuit while allowing controlled inrush. |
| Thermal Shutdown with Hysteresis | Triggers at 150°C with 20°C hysteresis-prevents thermal runaway and enables safe auto-recovery. |
Applications
| Portable Instrument Power | LCD TV Backlight Bias |
|---|---|
Use Scenario: Handheld multimeter or portable oscilloscope powered by single Li+ cell with variable load (display, ADC, MCU). IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 3.3V or 1.8V rail from 2.7–4.2V battery. Use Value: 100% duty cycle maintains regulation down to 2.5V input, extending runtime by ~18% vs. non-dropout converters. | Use Scenario: Local 5V or 12V bias supply for LED driver ICs in edge-lit LCD TVs. IC Role / Device Role / Timing Role: Intermediate buck stage converting 12V main rail to 5V for gate drivers and logic. Use Value: 1.25MHz switching allows <1.5mm² inductor footprint and minimizes audible noise in consumer audio-visual environments. |
| DVD±RW Drive Motor & Logic | PDA Core Voltage Regulation |
Use Scenario: Dual-rail supply for spindle motor driver (5V) and servo controller (3.3V) in optical disc drives. IC Role / Device Role / Timing Role: High-current (2.2A) buck converter powering motor driver ICs with fast transient response. Use Value: Peak-current-mode control delivers <50μs load-step recovery, preventing motor stall during seek operations. | Use Scenario: Core SoC supply in legacy PDAs with ARM9 or XScale processors requiring 1.2–1.5V at up to 2A. IC Role / Device Role / Timing Role: Main processor rail regulator with PWROK signaling to enable reset sequencing. Use Value: ±10% PWROK window with 50μs deglitch ensures reliable boot under dynamic CPU load changes. |
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, same QFN-10 package, lower quiescent current (25μA), no PWROK output. | Lacks power-good signaling; unsuitable where system-level reset coordination is required. | Select when size and efficiency are prioritized over monitoring capability and higher current is not needed. |
| RT7290BZSP | 2A rated, 1.5MHz, includes light-load pulse-skipping, 0.6V reference, but requires external compensation. | Higher BOM count due to compensation components; less layout-insensitive than MP2117's internal compensation. | Choose when adjustable frequency or light-load efficiency optimization outweighs simplicity and footprint constraints. |
Compared with MP1605DJ-LF-Z and RT7290BZSP, MP2117DQ-LF-Z uniquely combines 2.2A capability, integrated PWROK, 100% duty cycle, and internal compensation in a 3mm×3mm QFN-making it optimal for space-constrained, battery-powered systems needing robust power sequencing and dropout resilience.
Availability
MP2117DQ-LF-Z is available at Aetrix Electronics and suitable for portable instrument power, LCD TV bias, DVD±RW drive subsystems, and PDA core regulation requiring stable component supply through extended production lifecycles.
Supply support for MP2117DQ-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 design centers in the US, China, and Taiwan.
The MP2117 belongs to MPS's high-frequency synchronous buck converter product line, engineered specifically for compact, battery-powered consumer and industrial equipment demanding minimal board area, high efficiency, and seamless integration with Li+-based power sources.
FAQ
What is the maximum recommended PCB temperature rise for continuous 2.2A operation?
At ambient 70°C, the MP2117DQ-LF-Z's θJA = 50°C/W limits max power dissipation to 1.6W. With typical 85% efficiency at 5V→1.8V/2.2A, power loss is ~0.85W-resulting in ~43°C junction rise above ambient. Ensure ≥1cm² exposed copper under the thermal pad and ≥2 internal GND planes for safe operation.
Can MP2117DQ-LF-Z operate with input voltage below 2.5V?
No. The absolute minimum input voltage is 2.5V per datasheet operating conditions. Below this, UVLO (1.8–2.2V trip) disables the device, and internal circuitry cannot sustain regulation. For sub-2.5V inputs, consider ultra-low-VIN buck converters like MP2166 or discrete LDO solutions.
Is the PWROK output compatible with 1.8V logic systems?
Yes. PWROK is an open-drain output referenced to GND. When pulled up to any valid logic rail (1.8V, 3.3V, or 5V), it sinks ≤5mA and asserts HIGH at that rail voltage-enabling direct interface with 1.8V microcontrollers without level-shifting.
Does MP2117DQ-LF-Z require an external soft-start capacitor?
No. Internal soft-start is fixed and non-adjustable, ramping output over ~1.5ms. This eliminates external components while ensuring controlled inrush current-ideal for systems where startup timing predictability matters more than programmability.
How does the MP2117DQ-LF-Z respond to output short-circuit events?
Under short-circuit, the device reduces switching frequency and lowers PFET current limit to clamp short-circuit current. Once fault clears and FB rises above 0.6V, normal operation resumes automatically-no latch-off or manual reset required.
What is the minimum recommended output capacitance for stability?
22μF ceramic (X5R/X7R) is minimum per datasheet. Lower values risk instability due to insufficient phase margin; using <22μF may cause oscillation or poor transient response. Always place capacitor within 3mm of SW and PGND pins.
Is MP2117DQ-LF-Z pin-compatible with MP2117DN-SOIC8E?
No. MP2117DQ (QFN-10) and MP2117DN (SOIC-8E) have different pin counts, functions, and layouts. QFN-10 includes dedicated PGND and GND pins plus PWROK; SOIC-8E merges grounds and omits PWROK. Board redesign is required for package substitution.
MP2117DQ-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:
- 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-Z FAQ
1.How can I place an order for MP2117DQ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2117DQ-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 MP2117DQ-LF-Z reliable?
The price and inventory of MP2117DQ-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 MP2117DQ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2117DQ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2117DQ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2117DQ-LF-Z?
MP2117DQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2117DQ-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 MP2117DQ-LF-Z?
For technical support, including MP2117DQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2117DQ-LF-Z requirements.
6.How does Aetrix verify that MP2117DQ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2117DQ-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 MP2117DQ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2117DQ-LF-Z?
All MP2117DQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2117DQ-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 MP2117DQ-LF-Z part is unused and in its original packaging.
Return procedure for MP2117DQ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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