My Inquiry
My Account
Monolithic Power Systems Inc. MP2117DN-LF
- Part No.:
- MP2117DN-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2117DN-LF.pdf
- Description:
- IC REG BUCK ADJ 2.2A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:1,222
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2117DN-LF 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, delivers regulated 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 - used in LCD TV power rails and portable instrumentation.
For engineers reviewing the MP2117DN-LF datasheet, MP2117DN-LF pinout, MP2117DN-LF application, or MP2117DN-LF equivalent, key selection criteria include fixed 1.25MHz switching frequency, ±10% PWROK window with 50μs deglitch, EN threshold (0.3–1.5V), thermal shutdown at 150°C, and SOIC-8E thermal resistance (θJA = 50°C/W).
Technical Context
The MP2117DN-LF implements peak-current-mode PWM control with internal slope compensation, enabling stable regulation across >50% duty cycles and preventing subharmonic oscillation. Its fixed 1.25MHz oscillator synchronizes switching without external timing components.
It integrates dual MOSFETs (PFET + NFET), eliminating external diode losses, and features an open-drain PWROK output that asserts HIGH only when VOUT remains within ±10% of the FB-set value for ≥50μs - critical for system power sequencing in battery-powered devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 1.25MHz - enables compact LC filter design with ≤1.2μH inductors and reduces EMI fundamental below 2.5MHz. |
| Continuous Output Current | 2.2A - supports high-current loads like LCD bias rails or PDA core logic without external current boosting. |
| 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), 0.596V ±1.8% (–40°C to +85°C) - sets output accuracy for precision 1.2V/1.5V/1.8V rails via resistor divider. |
| Shutdown Quiescent Current | 0.01–1μA - extends shelf life and standby time in always-on portable instruments. |
| Thermal Shutdown Threshold | 150°C with 20°C hysteresis - protects die during sustained overload or poor PCB heatsinking in SOIC-8E package. |
| PWROK Accuracy Window | ±10% around regulated VOUT with 50μs deglitch - prevents false resets during transient load steps in DVD drive motors. |
Pinout & Package
MP2117DN-LF uses the SOIC-8E (8-pin, 0.150" wide) package with exposed pad connected to GND for thermal conduction. Pin mapping is validated per MPS datasheet Rev. 0.92.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB) | Feedback Input | Connects to resistor divider midpoint; senses output voltage for regulation - requires low-noise routing away from SW node. |
| 2 (EN) | Enable Control | Active-high digital enable (0.3–1.5V threshold); ties to VIN via resistor divider for automatic startup. |
| 3 (IN) | Input Supply | Primary power input (2.5–6V); must be decoupled with ≥10μF ceramic capacitor placed adjacent to pin. |
| 4,5 (PGND) | Power Ground | High-current return path for synchronous rectifier; connects directly to PCB ground plane under exposed pad. |
| 6 (GND) | Analog Ground | Reference ground for FB, EN, and internal error amplifier - star-connected to PGND at single point. |
| 7 (PWROK) | Power-On Reset Output | Open-drain status signal; pulled HIGH only when VOUT stays within ±10% for ≥50μs - drives microcontroller reset or FPGA configuration logic. |
| 8 (SW) | Switch Node | Drives external inductor; carries high di/dt - requires shortest possible trace to minimize EMI and voltage ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PFET + NFET switches | 0.20Ω high-side + 0.15Ω low-side RDS(on) - eliminates Schottky loss, enabling >90% efficiency at 2A/1.8Vout. |
| 100% duty-cycle operation | Enables dropout mode when VIN ≈ VOUT - extends runtime in deep-discharge Li+ battery conditions (e.g., <2.8V). |
| Cycle-by-cycle overcurrent protection | Trips at 2.5–4.5A peak switch current - limits fault energy during short-circuit, preventing inductor saturation or MOSFET failure. |
| Internal soft-start | Controls output ramp rate at startup - avoids inrush current into large output capacitors (e.g., 47μF ceramics) in portable instrument power supplies. |
| Stable with ceramic output capacitors | Eliminates need for electrolytic or tantalum caps - reduces board area and improves reliability in space-constrained PDAs. |
Applications
| Portable Instrumentation Power | LCD TV Backlight Driver |
|---|---|
Use Scenario: Handheld multimeter or oscilloscope requiring isolated 3.3V/1.8V rails from single Li+ cell. IC Role / Device Role / Timing Role: Primary buck regulator delivering 2.2A continuous current to analog front-end and MCU subsystems. Use Value: 100% duty cycle maintains regulation down to 2.5V input, extending usable battery life by >12% versus non-dropout converters. | Use Scenario: Local 5V-to-3.3V conversion for LED driver ICs in edge-lit LCD TV panels. IC Role / Device Role / Timing Role: Intermediate voltage rail generator with PWROK signaling to enable backlight IC only after stable 3.3V is established. Use Value: ±10% PWROK window with 50μs deglitch prevents false backlight disable during panel brightness transitions. |
| DVD±RW Drive Motor Supply | PDAs System Rail Generator |
Use Scenario: Powering spindle and sled motor drivers in portable optical drives operating from 3.6V nominal Li+ battery. IC Role / Device Role / Timing Role: High-current (2.2A peak) buck stage supplying motor H-bridge with low-noise 2.5V rail. Use Value: 1.25MHz switching allows use of 1.2μH inductor (Wurth 7447745012), reducing solution size by 35% vs. 500kHz alternatives. | Use Scenario: Generating core 1.2V and I/O 3.3V rails in palm-sized PDAs with tight thermal constraints. IC Role / Device Role / Timing Role: Dual-rail source using resistor-divider feedback and shared EN control for coordinated power-up. Use Value: SOIC-8E package with θJA = 50°C/W enables 1.6W max dissipation at 70°C ambient - sufficient for 2.2A/1.2V (2.64W out) with 85% efficiency. |
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, QFN-8 (2mm×2mm), 0.6V ref, no PWROK | Lacks power-good signaling and lower current rating - unsuitable where 2.2A load or system reset coordination is required. | Select only if board space is critical and PWROK is omitted from system architecture. |
| RT8205AZSP | 2A rated, 1.3MHz, SOIC-8, 0.6V ref, includes PWROK, but no 100% duty cycle | Cannot sustain regulation below ~2.8V input - limits usable battery depth in Li+ systems requiring extended low-VIN operation. | Prefer when PWROK is mandatory but dropout operation is not needed, and thermal budget allows higher RDS(on). |
Compared with MP1605DJ-LF-Z and RT8205AZSP, MP2117DN-LF uniquely combines 2.2A capability, 100% duty cycle, and PWROK in SOIC-8E - making it irreplaceable for Li+-powered portable instruments needing both high current and deep-discharge support.
Availability
MP2117DN-LF is available at Aetrix Electronics and suitable for portable instrumentation power, LCD TV local rails, DVD±RW drive motor supply, and PDA system rail generation requiring stable component supply amid end-of-life transitions.
Supply support for MP2117DN-LF 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 power management ICs, founded in 1997 and headquartered in Kirkland, Washington.
The MP2117 belongs to MPS's high-efficiency, high-frequency synchronous buck converter product line, engineered specifically for space- and battery-life-constrained portable electronics operating from single-cell Li+ sources.
FAQ
What is the maximum allowable input voltage for MP2117DN-LF?
The absolute maximum IN-to-GND voltage is +6.5V, but the recommended operating range is 2.5V to 6V. Exceeding 6V risks permanent damage to internal PFET gate oxide; operation above 6V is not characterized or guaranteed, even transiently.
Does MP2117DN-LF require external compensation components?
No - the MP2117DN-LF features fully internal compensation. It achieves stable operation with only external input/output capacitors and an inductor; no Type-II or Type-III compensation network is needed, simplifying layout and reducing BOM count.
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-stabilizes within ±10%, and the 50μs deglitch timer expires - ensuring reliable system reset sequencing after thermal recovery.
Can MP2117DN-LF operate with input voltage below 2.5V?
No - the under-voltage lockout (UVLO) rising threshold is 1.8–2.2V with 0.3V hysteresis. Below 2.5V, the device will not start or will shut down; operation below this range is outside specification and may cause erratic behavior or failure to regulate.
What is the purpose of the exposed pad on the SOIC-8E package?
The exposed pad on MP2117DN-LF's SOIC-8E is electrically connected to GND and serves as the primary thermal conduction path. It must be soldered to a dedicated PCB copper pour tied to the main ground plane to achieve the specified θJA = 50°C/W and prevent thermal shutdown at full load.
Is MP2117DN-LF pin-compatible with MP2117DQ?
No - MP2117DN-LF (SOIC-8E) and MP2117DQ (QFN-10) have different pin counts and layouts. While functional roles overlap (e.g., FB, EN, SW), pin 4/5 in SOIC map to PGND, whereas QFN assigns separate PGND and GND pins; direct replacement requires PCB redesign.
MP2117DN-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MP2117DN-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2117DN-LF 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 reliable?
The price and inventory of MP2117DN-LF 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 is usually 5 days.
3.What payment methods are accepted for MP2117DN-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2117DN-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2117DN-LF?
MP2117DN-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2117DN-LF 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?
For technical support, including MP2117DN-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2117DN-LF requirements.
6.How does Aetrix verify that MP2117DN-LF is sourced from the original manufacturer or authorized distributors?
All MP2117DN-LF 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 meets industry standards.
7.What is the process for return or replacement of MP2117DN-LF?
All MP2117DN-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP2117DN-LF, 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 part is unused and in its original packaging.
Return procedure for MP2117DN-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2117DN-LF 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…
