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

Monolithic Power Systems Inc. MP2106DQ-LF-Z

Name: MP2106DQ-LF-Z
Brand: Monolithic Power Systems Inc.
SKU: MP2106DQ-LF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP2106DQ-LF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 10-VFDFN Exposed Pad

Datasheet:: MP2106DQ-LF-Z.pdf

Description:: IC REG BUCK ADJ 1.5A 10QFN

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Product details

Overview

MP2106DQ-LF-Z from Monolithic Power Systems is a 1.5A, 800kHz synchronous buck converter in a 3×3mm QFN-10 package, designed for low-voltage DC/DC regulation with input range 2.6V–15V and output as low as 0.9V. It integrates 210mΩ high-side and 255mΩ low-side N-MOSFETs, features cycle-by-cycle current limiting, under-voltage lockout, soft-start, and thermal shutdown-enabling compact, high-efficiency power supplies in portable electronics.

For engineers reviewing the MP2106DQ-LF-Z datasheet, MP2106DQ-LF-Z pinout, MP2106DQ-LF-Z application, or MP2106DQ-LF-Z equivalent, key selection considerations include its 800kHz fixed-frequency current-mode control, 0.895V feedback reference, BST bootstrap requirement, and QFN-10 thermal performance (θJA = 50°C/W) for thermally constrained layouts.

Technical Context

The MP2106DQ-LF-Z implements peak-current-mode control with an internal 0.895V reference and transconductance error amplifier (G_EA = 300 µA/V, A_VEA = 400 V/V). Its 800kHz oscillator enables small external LC filter sizing, while the integrated high- and low-side switches eliminate external MOSFETs and reduce conduction loss.

Startup is managed via a 2µA soft-start current source charging an external capacitor at SS pin, ramping FB threshold linearly; protection includes under-voltage lockout (2.2V with 100mV hysteresis), thermal shutdown at 160°C, and source/sink current limits of 2.5A and 350mA respectively.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	1.5A continuous-supports mid-power digital loads without external heatsinking in QFN-10.
Input Voltage Range	2.6V to 15V-compatible with single-cell Li-ion (3.0–4.2V), USB PD (5V), and 12V industrial rails.
Switching Frequency	800kHz ±100kHz-enables use of ≤5µH inductors and <22µF ceramic output capacitors for space-constrained designs.
Feedback Reference	0.895V ±20mV-sets output voltage via resistive divider; enables precise 1.2V, 1.8V, 2.5V, or 3.3V regulation with standard 1% resistors.
Power Switch R_DS(on)	High-side: 255mΩ @ 5V VIN; Low-side: 210mΩ @ 5V VIN-minimizes conduction loss and improves full-load efficiency >90%.
Soft-Start Period	Configurable via external SS capacitor (e.g., 10nF → ~4.5ms)-prevents input inrush and output overshoot during power-up.
Thermal Resistance	θ_JA = 50°C/W (QFN-10 on 4-layer PCB)-supports 1.5A operation up to +85°C ambient without forced airflow.

Pinout & Package

MP2106DQ-LF-Z uses a 3×3mm, 10-pin QFN package with exposed thermal pad (JEDEC MO-229 VEED-5). The exposed pad must be soldered to PCB ground plane for optimal thermal performance and EMI reduction.

Pin/Terminal	Circuit Role	Design Meaning
1 SS	Soft-Start Control	Sinks 2µA to charge external capacitor; linearly scales FB reference during startup to limit inrush.
2 FB	Feedback Input	Inverting input of error amplifier; connected to voltage divider to regulate output at 0.895V threshold.
3 COMP	Compensation Node	Error amplifier output; requires RC network (e.g., 6.8kΩ + 3.3nF) to stabilize current-mode loop.
4 VREF	Internal 2.4V LDO Bypass	Bypass pin for internal regulator; requires ≥10nF ceramic cap to SGND-no external load permitted.
5 RUN	Enable/Shutdown Control	Active-high logic input; <0.4V disables IC, >1.5V enables; hysteresis ensures noise immunity.
6 BST	Bootstrap Supply	Drives high-side gate; requires ≥10nF capacitor between BST and LX to sustain gate voltage during high-duty cycles.
7 VIN	Main Power Input	Supplies internal circuitry via integrated LDO; bypass with ≥10µF ceramic cap to PGND near pin.
8 LX	Switch Node	Connection point between high- and low-side MOSFETs; routes to output inductor and BST capacitor.
9 PGND	Power Ground	Source of low-side MOSFET; must be tied to SGND with minimal impedance and short trace.
10 SGND	Signal Ground	Analog reference for FB, COMP, SS, VREF; isolated from PGND except at single-point star connection.

Key Features

Feature	Design Value
Synchronous Rectification	Integrated 210mΩ low-side N-MOSFET eliminates external diode, enabling >90% efficiency at 1.5A and reducing heat generation.
Zero-Current Shutdown Mode	Reduces quiescent current to 0.5–1.0µA when disabled-critical for battery-powered devices requiring ultra-low standby drain.
Internal Current Limit (Source & Sink)	2.5A overcurrent protection on high-side and 350mA reverse-current limit on low-side prevent damage during short-circuit or light-load reverse conduction.
Thermal Shutdown with Hysteresis	Shuts down at 160°C junction temperature and restarts only after cooling by ≥15°C-prevents thermal runaway without external intervention.
Fixed 800kHz Oscillator	Enables predictable EMI filtering and consistent component selection across designs; no external timing resistor required.

Applications

Portable Entertainment Systems

Digital Video Cameras

Use Scenario: Powering image sensor, ISP, and memory subsystems in handheld camcorders with Li-ion battery input (3.0–4.2V).

IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 1.2V/1.8V/2.8V rails with fast transient response to burst-mode sensor readouts.

Use Value: Synchronous architecture and 800kHz switching minimize output ripple (<15mV_pp) and enable compact 2.5×2.0-inch PCB layout per EV2106DQ/DK-00A reference design.

Use Scenario: Regulating core voltage for CMOS image sensor and video encoder ASIC in consumer-grade DV cameras.

IC Role / Device Role / Timing Role: High-efficiency buck converter supplying 1.8V @ 1.5A with tight load regulation (<±1%) across 0–100% load steps.

Use Value: Integrated power switches and soft-start prevent sensor reset glitches during camera power-on; QFN-10 footprint saves board area vs. discrete solutions.

Networking Equipment

Wireless Modems

Use Scenario: Generating 3.3V rail for Ethernet PHY, switch controller, and management MCU in SOHO routers and access points.

IC Role / Device Role / Timing Role: Main DC/DC converter accepting wide-input 5–12V PoE or wall adapter supply and delivering regulated 3.3V with UVLO protection.

Use Value: 2.6–15V input range accommodates both 5V USB-C and 12V DC inputs; thermal shutdown ensures reliability in sealed enclosures.

Use Scenario: Providing 2.5V or 3.3V supply to LTE/Wi-Fi baseband processor and RF front-end in mobile broadband modems.

IC Role / Device Role / Timing Role: Efficient intermediate bus converter stepping down 5V USB or 7.4V dual-cell Li-Po to low-noise processor core voltage.

Use Value: >90% efficiency extends battery life; current-mode control delivers <50µs recovery from 50–100% load transients typical of packetized data bursts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2108DQ-LF-Z	Higher 2A output current, same 800kHz frequency and QFN-10 package; 190mΩ/230mΩ R_DS(on).	Supports higher load currents but draws 1.8mA operating current vs. 1.2–1.8mA for MP2106DQ.	Select when >1.5A sustained load or lower R_DS(on) is required; pin-compatible but requires revalidation of compensation.
TPS561201DRCT	TI part: 1.2A, 650kHz, 4.5–17V input, adjustable 0.6–7V output; uses external MOSFETs.	Requires external high- and low-side FETs and more external components; supports wider input and adjustable V_OUT.	Choose for designs needing >15V input or programmable output; not drop-in-requires layout and loop compensation redesign.

Compared with MP2106DQ-LF-Z, MP2108DQ-LF-Z offers higher current headroom in identical footprint, while TPS561201DRCT trades integration for input/output flexibility-making MP2106DQ-LF-Z optimal for cost- and space-sensitive 1.5A applications within 2.6–15V input range.

Availability

MP2106DQ-LF-Z is available at Aetrix Electronics and suitable for portable entertainment systems, digital video cameras, networking equipment, and wireless modems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2106DQ-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, and global manufacturing partnerships.

The MP2106 belongs to MPS's mainstream synchronous buck converter product line, engineered for high-efficiency, low-EMI, space-constrained DC/DC conversion in battery-powered and wall-powered consumer and industrial electronics.

FAQ

What is the minimum recommended output voltage for MP2106DQ-LF-Z?

The MP2106DQ-LF-Z supports output voltages as low as 0.9V, set by the external resistive feedback divider referencing its 0.895V internal reference. For stable regulation below 1.2V, use precision 0.5% or better resistors and ensure PCB layout minimizes noise coupling to the FB pin.

Can MP2106DQ-LF-Z operate with a 2.5V input supply?

No-MP2106DQ-LF-Z has a minimum input voltage of 2.6V per datasheet specifications. At 2.5V, the under-voltage lockout (UVLO) activates at 2.2V with 100mV hysteresis, preventing startup. Reliable operation begins at VIN ≥ 2.6V across temperature and process variation.

Is an external bootstrap diode required for MP2106DQ-LF-Z?

An external bootstrap diode (e.g., IN4148) is optional and recommended only when V_OUT = 3.3V or 5V and duty cycle exceeds 65% (i.e., V_OUT/V_IN > 0.65). It improves high-duty-cycle efficiency by reducing BST capacitor discharge; otherwise, the internal charge pump suffices.

How is thermal performance affected by the QFN-10 exposed pad connection?

The exposed thermal pad on MP2106DQ-LF-Z must be soldered to a solid copper ground plane with ≥4 thermal vias (0.3mm diameter) to achieve the specified θ_JA = 50°C/W. Omitting the pad connection degrades θ_JA to ~100°C/W, limiting continuous output current to ~0.8A at +85°C ambient.

What compensation components are needed for a 1.8V/1.5A output using a 22µF ceramic capacitor?

Per MPS Application Note, use R3 = 6.8kΩ, C3 = 3.3nF, and leave C4 unpopulated for 1.8V output with 22µF ceramic output capacitor. This configuration sets loop crossover near 33kHz-well below 80kHz (1/10 of 800kHz switching frequency)-ensuring phase margin >45° and stable transient response.

Does MP2106DQ-LF-Z support forced PWM mode or only auto-skip mode?

The MP2106DQ-LF-Z operates exclusively in forced continuous conduction mode (CCM) at 800kHz-no pulse-skipping or discontinuous mode. This ensures constant switching frequency for predictable EMI filtering but results in reduced light-load efficiency compared to skip-mode converters.

What is the maximum allowable output capacitance for MP2106DQ-LF-Z?

No absolute maximum is specified, but stability depends on ESR and capacitance value. For ceramic outputs, up to 100µF is acceptable if compensated per Table 1; for tantalum (300mΩ ESR), 47µF is recommended. Excessive capacitance without proper zero/pole placement risks control-loop instability and oscillation.

MP2106DQ-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):: 2.6V

Voltage - Input (Max):: 15V

Voltage - Output (Min/Fixed):: 0.9V

Voltage - Output (Max):: 12V

Current - Output:: 1.5A

Frequency - Switching:: 800kHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-QFN (3x3)

MP2106DQ-LF-Z FAQ

1.How can I place an order for MP2106DQ-LF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP2106DQ-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 MP2106DQ-LF-Z reliable?

The price and inventory of MP2106DQ-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 MP2106DQ-LF-Z is usually 5 days.

3.What payment methods are accepted for MP2106DQ-LF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2106DQ-LF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP2106DQ-LF-Z?

MP2106DQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP2106DQ-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 MP2106DQ-LF-Z?

For technical support, including MP2106DQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2106DQ-LF-Z requirements.

6.How does Aetrix verify that MP2106DQ-LF-Z is sourced from the original manufacturer or authorized distributors?

All MP2106DQ-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 MP2106DQ-LF-Z meets industry standards.

7.What is the process for return or replacement of MP2106DQ-LF-Z?

All MP2106DQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2106DQ-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 MP2106DQ-LF-Z part is unused and in its original packaging.

Return procedure for MP2106DQ-LF-Z:

1.Submit a request within 90 days.

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

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