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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MP2106DK-LF-P

Name: MP2106DK-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MP2106DK-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP2106DK-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: MP2106DK-LF-P.pdf

Description:: IC REG BUCK ADJ 800MA 10MSOP

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Product details

Overview

MP2106DK-LF-P from Monolithic Power Systems is a 1.5A, 800kHz synchronous buck converter IC designed for low-voltage DC/DC regulation in space-constrained portable systems. It integrates 210mΩ (low-side) and 255mΩ (high-side) N-MOSFETs, operates from 2.6V to 15V input, delivers output as low as 0.9V, and achieves >90% efficiency at 1.5A load with 5V input.

For engineers reviewing the MP2106DK-LF-P datasheet, MP2106DK-LF-P pinout, MP2106DK-LF-P application, or MP2106DK-LF-P equivalent, this device supports compact high-efficiency power conversion in battery-powered consumer electronics where thermal performance, soft-start control, and cycle-by-cycle current limiting are critical selection criteria.

Technical Context

The MP2106DK-LF-P implements fixed-frequency current-mode control with an internal 800kHz oscillator, enabling stable regulation using small external LC components. Its error amplifier features 400 V/V gain and 300 µA/V transconductance, and the COMP pin supports pole-zero compensation for loop stability across varying output capacitors and loads.

It incorporates integrated protection including under-voltage lockout (2.2V threshold with 100mV hysteresis), thermal shutdown (160°C), and dual current limiting-2.5A source limit for the high-side switch and 350mA sink limit for the low-side rectifier-ensuring robust operation during fault conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	1.5A continuous - supports single-rail core logic or I/O supply in portable devices
Input Voltage Range	2.6V to 15V - compatible with single-cell Li-ion, multi-cell alkaline, and 5V/12V wall adapters
Switching Frequency	800kHz ±100kHz - enables use of ≤5µH inductors and <22µF ceramic output capacitors
Feedback Reference	0.895V ±20mV - sets precise output voltage via external resistor divider (e.g., 10kΩ + 10kΩ for 1.8V)
Internal Switch R_DS(on)	255mΩ (HS) / 210mΩ (LS) at 5V VIN - minimizes conduction loss without requiring external MOSFETs
Soft-Start Current	2µA - linearly ramps output voltage over 4–10ms using 10–22nF SS capacitor
Shutdown Current	0.5–1.0µA - enables ultra-low quiescent power in battery standby mode

Pinout & Package

The MP2106DK-LF-P uses a lead-free, RoHS-compliant 10-pin MSOP package (3.0mm × 4.9mm, 0.5mm pitch) with exposed thermal pad on bottom side for enhanced heat dissipation. Pin 1 is marked by half-circle indentation per JEDEC MO-817 BA.

Pin/Terminal	Circuit Role	Design Meaning
1 SS	Soft-Start Control Input	2µA current source charges external capacitor to ramp feedback threshold and limit inrush current
2 FB	Feedback Sense Input	Inverting input of error amplifier; compares divided output voltage to 0.895V reference
3 COMP	Compensation Node	Error amplifier output; connects RC network to stabilize control loop across load and capacitor variations
4 VREF	2.4V Internal LDO Bypass	Bypassed with ≥10nF capacitor; supplies bias for internal circuitry-no external load permitted
5 RUN	Enable/Shutdown Control	Logic-level input: <0.4V disables IC (0.5µA I_Q); >1.5V enables operation with UVLO hysteresis
6 BST	Bootstrap Capacitor Terminal	Drives high-side gate via 10nF+ capacitor between BST and LX; self-charged during low-side conduction
7 VIN	Main Power Input	Supplies internal LDO and gate drivers; requires ≥10µF ceramic bypass to PGND near pin
8 LX	Switch Node	Connection point between high-side drain and low-side source; drives external inductor and LC filter
9 PGND	Power Ground Return	Low-side MOSFET source return; must be connected to SGND with minimal impedance and short trace
10 SGND	Signal Ground Reference	Analog ground for FB, COMP, SS, VREF, and RUN; isolated from PGND except at single-point star connection

Key Features

Feature	Design Value
Synchronous Rectification	Integrated 210mΩ low-side N-MOSFET eliminates external Schottky diode, reducing conduction loss and board area
Zero-Current Shutdown Mode	Reduces quiescent current to sub-1µA when disabled, extending battery life in always-on portable systems
Cycle-by-Cycle Current Limit	2.5A peak source limit prevents inductor saturation and ensures safe startup into heavy loads or short circuits
Thermal Shutdown Protection	160°C junction trip point with hysteresis prevents permanent damage during sustained overload or poor PCB cooling
Internal 2.4V LDO Regulator	Stable bias rail for analog blocks; bypassed with 10nF capacitor-no external loading allowed to maintain accuracy

Applications

DC/DC Regulation from Wall Adapters

Portable Entertainment Systems

Use Scenario: Converting 5V/12V adapter output to 1.8V/2.5V for SoC core or memory rails in set-top boxes or streaming sticks.

IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated low-voltage power with fast transient response to dynamic CPU load changes.

Use Value: 800kHz switching allows compact 5µH inductor and 22µF ceramic output cap, reducing solution footprint by >30% vs. 500kHz alternatives.

Use Scenario: Powering audio DACs, display drivers, and wireless baseband ICs in Bluetooth speakers or handheld gaming devices.

IC Role / Device Role / Timing Role: High-efficiency buck converter supplying clean 3.3V rail from single-cell Li-ion (3.0–4.2V) with zero-current shutdown during sleep.

Use Value: >90% efficiency at 1.5A and 3.3V out extends battery runtime; soft-start prevents audible pop in audio subsystems.

Digital Video Cameras

Networking Equipment

Use Scenario: Generating 1.2V core voltage for image sensor processors and 1.8V I/O voltage for CMOS sensor interfaces.

IC Role / Device Role / Timing Role: Compact, thermally efficient DC/DC converter operating across wide input range (2.6–15V) to accommodate varied battery and USB power sources.

Use Value: Integrated 210mΩ/255mΩ switches eliminate discrete FETs and gate drivers, simplifying layout and improving EMI performance.

Use Scenario: Providing 5V auxiliary rail for PoE-powered Ethernet switches or Wi-Fi access point RF front-ends.

IC Role / Device Role / Timing Role: Secondary buck regulator converting 12V mid-rail to 5V for PHY or management MCU, with thermal shutdown for reliability in enclosed enclosures.

Use Value: MSOP10 package with exposed thermal pad sustains 1.5A continuous load at +70°C ambient without forced airflow.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2108DK-LF-Z	Same 10-pin MSOP package, but rated for 2A output and 220mΩ/180mΩ R_DS(on); higher current capability with identical pinout	Supports higher load currents (e.g., 2A FPGA I/O rails) without redesigning PCB layout or compensation network	Select when future-proofing for >1.5A loads or lower thermal margin is required; same soft-start and protection features
TPS561201DRCT	TI 1.2A buck with 500kHz f_SW, different pinout (8-pin WSON), no BST pin-uses external bootstrap diode; 0.6V reference	Requires larger inductor (≥6.8µH) and different compensation; lacks integrated low-side switch, increasing BOM count	Choose only if TI ecosystem alignment or specific 0.6V reference requirement outweighs size and efficiency penalties

Compared with MP2106DK-LF-P, MP2108DK-LF-Z offers higher current headroom in identical footprint, while TPS561201DRCT trades integration and frequency for vendor-specific toolchain compatibility and lower reference voltage flexibility.

Availability

MP2106DK-LF-P is available at Aetrix Electronics and suitable for portable entertainment systems, digital video cameras, networking equipment, and DC/DC regulation from wall adapters requiring stable component supply, consistent parametric performance, and long-term industrial availability.

Supply support for MP2106DK-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 MP2106 belongs to MPS's high-frequency synchronous buck converter product line, engineered for space-constrained, battery-powered consumer electronics demanding high efficiency, low quiescent current, and minimal external component count.

FAQ

What is the recommended soft-start capacitor value for MP2106DK-LF-P?

Use a 10nF to 22nF ceramic capacitor from SS to SGND. A 10nF capacitor yields ~4ms soft-start time; 22nF extends it to ~10ms. The internal 2µA current source linearly charges this capacitor, ramping the FB threshold voltage to limit inrush current during startup.

Can MP2106DK-LF-P operate with a 3.3V input and 1.2V output?

Yes. With VIN = 3.3V and VOUT = 1.2V, the duty cycle is ~36%, well within the 85% maximum. The 0.895V feedback reference allows precise output setting using standard resistors (e.g., R1 = 10kΩ, R2 = 3.4kΩ). Efficiency exceeds 88% at 1.5A load per typical curves.

Does MP2106DK-LF-P require an external bootstrap diode?

No-its internal charge pump self-biases the BST capacitor during low-side conduction. An external diode (e.g., IN4148) is optional only for high-duty-cycle applications (VOUT/VIN > 65%) like 5V→3.3V conversion to improve light-load efficiency.

What is the thermal resistance θ_JA for the MSOP10 package?

The MSOP10 package has θ_JA = 150°C/W on a standard 4-layer JEDEC test board (JESD51-7). With 1.5A load and 5V input, junction temperature rise is ~112°C above ambient-well below the 125°C max operating limit when ambient stays ≤35°C.

How does the current limit behave during short-circuit events?

Under short-circuit, the MP2106DK-LF-P activates cycle-by-cycle current limiting: high-side switch turns off when sensed current exceeds 2.5A. If fault persists, thermal shutdown triggers at 160°C. Recovery is automatic after cooldown and RUN pin reassertion.

Is the VREF pin intended for external biasing?

No. VREF is an internal 2.4V LDO output used solely to power internal analog circuitry. It must be bypassed with ≥10nF capacitor to SGND but cannot drive external loads-doing so degrades reference accuracy and regulation stability.

What PCB layout practices maximize efficiency and stability?

Minimize high-current loop area (VIN → LX → PGND → VIN), place input/output capacitors within 3mm of respective pins, route FB and COMP traces away from LX/SW, connect PGND and SGND at a single point near the IC, and use the exposed thermal pad with ≥6 thermal vias to inner ground plane.

MP2106DK-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):: 2.5V

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 0.6V

Voltage - Output (Max):: 6V

Current - Output:: 800mA

Frequency - Switching:: 1.05MHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-MSOP

MP2106DK-LF-P FAQ

1.How can I place an order for MP2106DK-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP2106DK-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 MP2106DK-LF-P reliable?

The price and inventory of MP2106DK-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 MP2106DK-LF-P is usually 5 days.

3.What payment methods are accepted for MP2106DK-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2106DK-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP2106DK-LF-P?

MP2106DK-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP2106DK-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 MP2106DK-LF-P?

For technical support, including MP2106DK-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2106DK-LF-P requirements.

6.How does Aetrix verify that MP2106DK-LF-P is sourced from the original manufacturer or authorized distributors?

All MP2106DK-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 MP2106DK-LF-P meets industry standards.

7.What is the process for return or replacement of MP2106DK-LF-P?

All MP2106DK-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2106DK-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 MP2106DK-LF-P part is unused and in its original packaging.

Return procedure for MP2106DK-LF-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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