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Monolithic Power Systems Inc. MP2361DK-LF-P
- Part No.:
- MP2361DK-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MP2361DK-LF-P.pdf
- Description:
- IC REG BUCK ADJ 2A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,872
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Product details
Overview
MP2361DK-LF-P from Monolithic Power Systems is a monolithic synchronous step-down DC/DC converter with integrated 0.18Ω high-side MOSFET, delivering 2A continuous output current across 4.75V–23V input range, fixed 1.4MHz switching frequency, and adjustable output from 0.92V to 16V; used in battery chargers and DSL modems requiring compact, efficient pre-regulation.
For engineers reviewing the MP2361DK-LF-P datasheet, MP2361DK-LF-P pinout, MP2361DK-LF-P application, or MP2361DK-LF-P equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and protection behavior, and real-world design implications for industrial and embedded power systems.
Technical Context
The MP2361DK-LF-P implements current-mode control with slope compensation, enabling fast transient response and stable loop operation across wide duty cycles. Its internal transconductance error amplifier (630–1230 μA/V) and 1.4MHz oscillator provide precise regulation under varying load and line conditions.
It integrates cycle-by-cycle overcurrent protection and thermal shutdown at 160°C, with programmable UVLO via EN pin (2.37–2.62V rising threshold) and soft-start controlled by external capacitor on SS pin. The bootstrap circuit supports high-side gate drive using an external 10nF capacitor between BS and SW pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous - supports sustained loads in portable and telecom power rails without external current boosting. |
| Input Voltage Range | 4.75V to 23V - accommodates 5V, 12V, and 19V adapter inputs while tolerating automotive transients up to 23V. |
| Switching Frequency | Fixed 1.4MHz - enables use of small external inductors (e.g., 2.2μH) and ceramic capacitors, reducing board area. |
| Feedback Reference | 0.92V ±2.8% - sets output voltage via resistor divider; low reference minimizes divider current and improves light-load accuracy. |
| High-Side RDS(ON) | 0.18Ω - reduces conduction loss at 2A, contributing to 90% peak efficiency at mid-load in typical 12V→5V designs. |
| Shutdown Current | 20μA - enables ultra-low-power standby in battery-backed systems without external enable sequencing. |
| Thermal Shutdown | 160°C - protects die during overload or poor PCB thermal design; auto-recovery after cooldown. |
Pinout & Package
MP2361DK-LF-P is housed in a 3mm × 3mm QFN10 package with exposed thermal pad (connected to GND), optimized for high-power density and thermal performance (θJA = 50°C/W on 4-layer PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 | No Connect (NC) | Unused pins; must remain unconnected per datasheet to avoid parasitic coupling or latch-up risk. |
| 2 | Bootstrap (BS) | Drives high-side MOSFET gate above IN; requires 10nF ceramic capacitor to SW for floating 5V gate supply. |
| 4 | IN | Main input supply (4.75–23V); connects to bulk input capacitor to suppress switching noise and voltage spikes. |
| 5 | SW | Switch node - connects to inductor and external Schottky diode; high dv/dt node requiring tight layout and ground isolation. |
| 6 | GND | Power and signal ground reference; must be tied to exposed pad and routed separately from noisy return paths. |
| 7 | FB | Feedback input - senses output via resistor divider; sensitive analog node requiring short, shielded trace routing. |
| 8 | COMP | Error amplifier output - sets loop compensation via RC network; critical for stability and transient response tuning. |
| 9 | EN | Enable/UVLO input - active-high (≥2.62V); supports programmable startup delay and brown-out protection with external divider. |
| 10 | SS | Soft-start control - connects to external capacitor to linearly ramp COMP voltage, limiting inrush current and output overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.18Ω High-Side MOSFET | Eliminates need for external switch and driver, reducing BOM count and layout complexity in space-constrained designs. |
| Stable with Ceramic Output Capacitors | Supports low-ESR MLCCs down to 10μF, enabling compact, low-noise output filtering without tantalum or electrolytic dependencies. |
| Programmable Soft-Start | External SS capacitor sets startup time; prevents input rail collapse and output overshoot during cold boot or hot-swap events. |
| Cycle-by-Cycle Overcurrent Protection | Detects peak inductor current each cycle, limiting fault energy and enabling safe recovery without latching off. |
| Thermal Shutdown with Hysteresis | Shuts down at 160°C and restarts ~15°C below trip point, preventing thermal cycling damage during sustained overload. |
Applications
| Battery Charger Pre-Regulator | DSL Modem Power Supply |
|---|---|
|
Use Scenario: Converts 12V wall adapter output to 5V/2A for Li-ion charging IC and system logic in portable battery packs. IC Role / Device Role / Timing Role: Primary buck regulator providing stable, efficient intermediate rail; operates continuously during charge cycles. Use Value: 90% efficiency at 2A reduces thermal load on sealed enclosures; 1.4MHz switching allows <2.2μH inductor, shrinking total solution size by >30% vs. lower-frequency alternatives. |
Use Scenario: Supplies regulated 3.3V/2A to DSL PHY, microcontroller, and line interface ICs in residential broadband modems. IC Role / Device Role / Timing Role: Main system power rail generator; handles dynamic load steps from data burst transmission. Use Value: Current-mode control delivers <50μs load transient response; programmable UVLO ensures clean startup only when input stabilizes post-AC rectification. |
| Distributed Power System Node | Pre-Regulator for Linear Regulators |
|
Use Scenario: Provides 2.5V/2A to FPGA I/O banks in multi-rail telecom infrastructure cards with strict noise and ripple requirements. IC Role / Device Role / Timing Role: Intermediate buck stage feeding low-noise LDOs; operates at fixed 1.4MHz to avoid interference with RF sections. Use Value: Low 0.92V feedback reference enables accurate 2.5V output with standard 1% resistors; soft-start prevents upstream supply sag during card insertion. |
Use Scenario: Steps down 12V bus to 5.5V for downstream 3.3V LDO in instrumentation systems requiring ultra-low output noise. IC Role / Device Role / Timing Role: Efficient pre-regulator minimizing LDO dropout and heat dissipation; configured for minimal output ripple. Use Value: Stable operation with ceramic output caps eliminates ESR-related instability; COMP pin access enables custom compensation for optimal LDO input ripple rejection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2362DK-LF-P | Same pinout and package, but 3A rated (vs. 2A); higher RDS(ON) (0.15Ω) and 1.2MHz fS. | Higher current capability suits 3A loads; lower frequency increases inductor size but eases EMI filtering. | Select when output current exceeds 2A or when lower switching frequency is preferred for EMI compliance. |
| RT7272BGJ6F | 2A, 24V input, 1.3MHz fS, but uses external MOSFETs; no integrated high-side switch. | Requires external power stage - adds BOM cost and layout complexity but enables higher efficiency at light loads via FET selection. | Choose when thermal constraints prevent integrated solutions or when discrete FET optimization (e.g., GaN) is required. |
Compared with MP2361DK-LF-P, MP2362DK-LF-P offers higher current headroom in identical footprint, while RT7272BGJ6F trades integration for flexibility in high-efficiency or high-temperature deployments where discrete FETs improve thermal management.
Availability
MP2361DK-LF-P is available at Aetrix Electronics and suitable for battery charger pre-regulators, DSL modem power supplies, distributed power nodes, and LDO pre-regulation circuits requiring stable component supply, RoHS-compliant packaging, and full traceability.
Supply support for MP2361DK-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 power ICs, with core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP2361 belongs to MPS's high-density buck converter product line, designed specifically for space-constrained, efficiency-critical applications in networking, computing, and consumer electronics where integration, thermal performance, and reliability are paramount.
FAQ
What is the maximum recommended output voltage for MP2361DK-LF-P?
The MP2361DK-LF-P supports adjustable output from 0.92V to 16V, set by an external resistor divider on the FB pin. The upper limit is constrained by absolute maximum ratings: VSW ≤ 26V and VIN ≤ 25V. For reliable long-term operation, output should remain ≥1V below input voltage to maintain sufficient headroom for regulation and transient response.
Can MP2361DK-LF-P operate with only ceramic capacitors on input and output?
Yes - the MP2361DK-LF-P is explicitly characterized for stability with low-ESR ceramic capacitors on both input and output. The datasheet confirms compatibility with standard X5R/X7R MLCCs, eliminating need for tantalum or electrolytic types. Input capacitance ≥10μF and output ≥22μF are typical minimums for 2A operation at 1.4MHz.
How does the EN pin function beyond simple on/off control?
The EN pin provides dual functionality: hard enable/disable (≥2.62V = on, ≤0.7V = shutdown) and programmable UVLO via external resistor divider from IN to GND. The 210mV hysteresis prevents oscillation near threshold, and internal 1.0μA pull-up enables automatic startup when left floating - simplifying designs without external bias networks.
What thermal derating applies to MP2361DK-LF-P in MSOP10 package?
In the MSOP10 package (MP2361DK), the maximum continuous power dissipation is 0.83W at +25°C ambient, with θJA = 150°C/W. Derating begins at +25°C: usable power drops linearly to zero at +90°C ambient. Layout with 2oz copper, thermal vias to inner layers, and exposed pad soldering improves real-world thermal margin by ~25°C junction rise.
Is an external bootstrap diode required for MP2361DK-LF-P?
An external bootstrap diode (e.g., IN4148) is optional and recommended only when VOUT = 3.3V or 5V *and* duty cycle exceeds 65% (i.e., VIN > 7.7V for 3.3V out, or >15.4V for 5V out). It improves high-side gate drive efficiency by reducing bootstrap capacitor discharge, especially under heavy load or high ambient temperature.
What is the minimum inductor value recommended for 12V-to-5V/2A operation?
For 12V input to 5V/2A output, the datasheet recommends inductor ripple current ≈30% of switch current limit (~3A), yielding ~2.2μH as typical value. Minimum practical value is ~1.5μH - smaller values increase peak current stress and reduce efficiency, while larger values (>4.7μH) improve ripple but degrade transient response and require larger physical size.
Does MP2361DK-LF-P support synchronization to an external clock?
No - the MP2361DK-LF-P features a fixed internal 1.4MHz oscillator with no external sync input. Frequency foldback occurs only during short-circuit (FB < 400mV), dropping to 210kHz to limit fault energy. For synchronized operation, consider MPS's MPQ2361 series or alternative families like RT7272B with SYNC pin support.
MP2361DK-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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):
- 4.75V
- Voltage - Input (Max):
- 23V
- Voltage - Output (Min/Fixed):
- 0.92V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 2A
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
MP2361DK-LF-P FAQ
1.How can I place an order for MP2361DK-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2361DK-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 MP2361DK-LF-P reliable?
The price and inventory of MP2361DK-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 MP2361DK-LF-P is usually 5 days.
3.What payment methods are accepted for MP2361DK-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2361DK-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2361DK-LF-P?
MP2361DK-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2361DK-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 MP2361DK-LF-P?
For technical support, including MP2361DK-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2361DK-LF-P requirements.
6.How does Aetrix verify that MP2361DK-LF-P is sourced from the original manufacturer or authorized distributors?
All MP2361DK-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 MP2361DK-LF-P meets industry standards.
7.What is the process for return or replacement of MP2361DK-LF-P?
All MP2361DK-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2361DK-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 MP2361DK-LF-P part is unused and in its original packaging.
Return procedure for MP2361DK-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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