My Inquiry
My Account
Monolithic Power Systems Inc. MP2117DN-LF-Z
- Part No.:
- MP2117DN-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2117DN-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 2.2A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:1,097
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2117DN-LF-Z from Monolithic Power Systems is a 1.25MHz, 2.2A synchronous step-down DC-DC converter in SOIC-8E package, designed for Li+-battery-powered portable systems. It operates from 2.5V–6V input, regulates output down to 0.6V, supports 100% duty cycle for low-dropout operation, and integrates high-side PFET (0.20Ω) and synchronous NFET (0.15Ω) switches.
For engineers reviewing the MP2117DN-LF-Z datasheet, MP2117DN-LF-Z pinout, MP2117DN-LF-Z application, or MP2117DN-LF-Z equivalent, key selection criteria include fixed 1.25MHz switching frequency, ±10% PWROK window with 50μs deglitch, 1μA shutdown current, thermal shutdown at 150°C, and compatibility with ceramic output capacitors.
Technical Context
The MP2117DN-LF-Z implements peak-current-mode PWM control with internal slope compensation, enabling stable regulation across >50% duty cycles and fast transient response. Its integrated power stage eliminates external diodes and supports full-cycle 100% duty operation for battery brownout resilience.
It features an open-drain PWROK output asserting HIGH when VOUT is within ±10% of regulation, with built-in 50μs deglitching to suppress false triggers during load transients. EN pin logic threshold is 0.3V–1.5V over –40°C to +85°C, supporting direct microcontroller interface or resistor-divider enable sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 1.25MHz - enables compact LC filter design with ≤2.2μH inductors and reduces EMI fundamental below 2MHz. |
| Continuous Output Current | 2.2A - sustained delivery under thermal limits in SOIC-8E package at TA ≤70°C with θJA = 50°C/W. |
| Input Voltage Range | 2.5V to 6V - matches single-cell Li+ battery discharge profile (4.2V–2.7V) with margin for voltage drops. |
| Feedback Reference Voltage | 0.596V ±1.2% (25°C), ±2.2% (–40°C to +85°C) - sets output accuracy via external resistor divider; enables 0.6V–6V programmable VOUT. |
| Shutdown Current | 1μA max - minimizes battery drain in standby mode for portable instrumentation and PDAs. |
| PWROK Accuracy Window | ±10% around regulated VOUT - provides reliable power-good signaling for system sequencers without external comparators. |
| Thermal Shutdown Threshold | 150°C with 20°C hysteresis - protects die integrity during overload or poor PCB heatsinking; auto-recovery on cooldown. |
Pinout & Package
MP2117DN-LF-Z uses the SOIC-8E (8-pin, 3.9mm × 4.9mm, 1.27mm pitch) package with exposed pad connected to GND for thermal performance. Pin mapping is validated per MPS datasheet Rev. 0.92.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Supply | Primary power input (2.5V–6V); requires local 10–22μF X5R/X7R ceramic capacitor to PGND. |
| 2 (SW) | Switch Node | Drain connection of internal PFET and source of NFET; high dv/dt node requiring short, low-inductance routing to inductor. |
| 3 (PGND) | Power Ground | Return path for high-current synchronous rectifier; must be tied directly to IN capacitor ground and exposed pad. |
| 4,5 (GND) | Analog Ground | Reference for FB, EN, and internal error amplifier; connect to PGND at single point near exposed pad. |
| 6 (FB) | Feedback Input | Senses output via resistor divider; high-impedance (±50nA bias) node sensitive to noise-route away from SW. |
| 7 (PWROK) | Power-Good Open Drain | Active-low indicator pulled up externally; asserts HIGH only when VOUT is within ±10% of target for ≥50μs. |
| 8 (EN) | Enable Control | Logic-level input (0.3V/1.5V thresholds); tie to VIN via resistor divider for automatic startup or MCU GPIO for sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PFET/NFET Power Stage | 0.20Ω / 0.15Ω RDS(on) - eliminates external Schottky diode, achieves >90% efficiency at 1.8V/2A with 5V input. |
| 100% Duty Cycle Operation | Enables dropout <100mV at 2.2A - extends runtime in Li+ systems as battery discharges below VOUT + VDS(on). |
| Internal Compensation | Eliminates external Type-II/III compensation network - reduces BOM count and layout sensitivity for ceramic-capacitor-only designs. |
| Cycle-by-Cycle Current Limit | 3.3A typical peak limit - prevents MOSFET destruction during short-circuit or startup into heavy loads without external sensing. |
| Internal Soft-Start | Programmed 1ms ramp time - controls inrush current into output capacitors, avoiding input rail collapse or PWROK false assertion. |
Applications
| DVD±RW Drive Power | LCD TV Logic Supply |
|---|---|
Use Scenario: Powers laser diode driver and servo ICs in portable DVD burners operating from 3.7V Li+ battery. IC Role / Device Role / Timing Role: Primary 1.2V/1.8V step-down regulator delivering 2.2A peak current during write operations. Use Value: 100% duty cycle maintains regulation down to 2.7V battery voltage, extending usable charge by ~12% versus non-dropout converters. | Use Scenario: Supplies 3.3V to TCON (timing controller) and MCU in 10–24" LCD TV panels with integrated power board. IC Role / Device Role / Timing Role: Secondary buck converter downstream of main 12V rail; synchronized via fixed 1.25MHz clock to minimize beat frequencies. Use Value: 90% efficiency at 2A reduces thermal load on compact power board, eliminating need for heatsink or forced air. |
| PDA Core Voltage Rail | Portable Instrument ADC Supply |
Use Scenario: Generates 1.2V core voltage for ARM9/ARM11 processors in handheld diagnostic tools with 4–6 hour battery life. IC Role / Device Role / Timing Role: High-efficiency, low-noise buck regulator with PWROK enabling safe processor reset sequencing. Use Value: 1μA shutdown current preserves battery during sleep mode; ±10% PWROK window ensures deterministic boot timing. | Use Scenario: Provides ultra-stable 5V analog supply to 16-bit SAR ADC and precision op-amps in battery-powered multimeters. IC Role / Device Role / Timing Role: Low-ripple, low-noise power source with minimized switching artifacts due to fixed-frequency operation and ceramic filtering. Use Value: Internal soft-start prevents ADC reference disturbance at power-on; thermal shutdown prevents calibration drift during extended measurements. |
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 | 2.5A rating, 2MHz switching, smaller 8-pin QFN (2mm×2mm), lower quiescent current (25μA) | Requires revised PCB layout and smaller inductor; better suited for space-constrained wearables | Select for new designs needing higher current headroom and miniaturization; not drop-in compatible due to package and pinout change |
| RT8059NGQW | 2A rating, 1.5MHz, external compensation, adjustable soft-start, no PWROK output | Lacks integrated power-good signaling; requires external comparator for system sequencing | Choose when design flexibility (e.g., custom loop tuning) outweighs BOM simplicity and PWROK dependency |
Compared with MP2117DN-LF-Z, MP1605DJ-LF-Z offers higher current and frequency in a smaller footprint but demands layout revision, while RT8059NGQW trades PWROK and integration for tuning freedom-neither replicates the exact SOIC-8E drop-in replacement capability for legacy Li+ portable systems.
Availability
MP2117DN-LF-Z is available at Aetrix Electronics and suitable for DVD±RW drives, LCD TV logic supplies, and portable instrumentation requiring stable component supply amid end-of-life transitions.
Supply support for MP2117DN-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, headquartered in Kirkland, WA, with global design and support centers.
The MP2117 belongs to MPS's synchronous buck converter product line, engineered specifically for high-efficiency, small-footprint power delivery in battery-powered consumer and industrial portable equipment.
FAQ
What is the recommended input capacitor for MP2117DN-LF-Z?
A 10μF to 22μF X5R or X7R ceramic capacitor placed directly between IN and PGND is required. This capacitor must have low ESR (<10mΩ) and be located within 2mm of the IN and PGND pins to suppress high-frequency switching noise and reduce input surge current.
Does MP2117DN-LF-Z support adjustable switching frequency?
No. MP2117DN-LF-Z has a factory-trimmed, internally fixed switching frequency of 1.25MHz. There is no external resistor or capacitor option to adjust frequency; this simplifies design but precludes EMI frequency shifting or efficiency optimization across load ranges.
How does the PWROK signal behave during thermal shutdown?
During thermal shutdown, PWROK is actively pulled LOW. It remains LOW until the junction temperature falls below the hysteresis threshold (~130°C), output voltage re-regulates to within ±10% of target, and the 50μs deglitch timer expires-ensuring clean system reset without chatter.
Can MP2117DN-LF-Z operate with an output voltage below 0.6V?
No. The internal feedback reference is trimmed to 0.596V ±1.2%, and the datasheet specifies a minimum regulated output of 0.6V. Attempting lower outputs via external circuitry violates regulation accuracy and may cause instability or undervoltage lockout behavior.
What is the maximum allowable continuous output current at 85°C ambient?
At TA = +85°C, continuous output current is limited to approximately 1.4A in SOIC-8E package. This is derived from thermal limits: PD(max) = (150°C − 85°C)/50°C/W = 1.3W; subtracting quiescent losses leaves ~1.25W for I²R dissipation, yielding IOUT ≈ √(1.25W / 0.35Ω) ≈ 1.4A.
Is MP2117DN-LF-Z pin-compatible with MP2117DQ-LF-Z?
No. MP2117DN-LF-Z uses SOIC-8E (8-pin) packaging with specific pin assignments, while MP2117DQ-LF-Z uses 10-pin QFN (3mm×3mm). Their pin counts, layouts, thermal pads, and pin functions differ-PCB redesign is required for substitution.
MP2117DN-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) 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:
- 8-SOICE
MP2117DN-LF-Z FAQ
1.How can I place an order for MP2117DN-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2117DN-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 MP2117DN-LF-Z reliable?
The price and inventory of MP2117DN-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 MP2117DN-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2117DN-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2117DN-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2117DN-LF-Z?
MP2117DN-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2117DN-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 MP2117DN-LF-Z?
For technical support, including MP2117DN-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2117DN-LF-Z requirements.
6.How does Aetrix verify that MP2117DN-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2117DN-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 MP2117DN-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2117DN-LF-Z?
All MP2117DN-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2117DN-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 MP2117DN-LF-Z part is unused and in its original packaging.
Return procedure for MP2117DN-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2117DN-LF-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
