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

Monolithic Power Systems Inc. MP28114DG-LF-P

Name: MP28114DG-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MP28114DG-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP28114DG-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-TFDFN Exposed Pad

Datasheet:: MP28114DG-LF-P.pdf

Description:: IC REG BUCK ADJ 600MA 8QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP28114DG-LF-P from Monolithic Power Systems is a 1.7MHz constant-frequency, current-mode synchronous step-down DC/DC converter optimized for single-cell Li+-battery-powered portable devices. It delivers up to 600mA load current from 2.5V–6V input, regulates output down to 0.6V, integrates PFET/NFET switches, and supports 100% duty-cycle operation for low-dropout applications in space-constrained designs.

For engineers reviewing the MP28114DG-LF-P datasheet, MP28114DG-LF-P pinout, MP28114DG-LF-P application, or MP28114DG-LF-P equivalent, key selection criteria include its ultra-small 2×2mm QFN8 package, fixed or adjustable output configuration, thermal shutdown threshold at 145°C, <0.1µA shutdown current, and integrated synchronous rectification eliminating external Schottky diodes.

Technical Context

The MP28114DG-LF-P implements slope-compensated current-mode PWM control with a fixed 1.7MHz oscillator, enabling stable regulation and cycle-by-cycle current limiting. Its internal PFET (0.44Ω R_DS(on)) and NFET (0.29Ω R_DS(on)) switches operate in complementary phases, supporting continuous conduction mode and seamless transition into 100% duty-cycle dropout operation as input voltage approaches output voltage.

Feedback is regulated via a precision 0.600V ±2% reference applied to the FB pin, with external resistor divider programming for adjustable versions. The EN pin provides logic-level enable/disable control with 0.3V–0.96V hysteresis, while short-circuit protection reduces switching frequency and lowers PFET current limit to 0.7A during fault conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	1.7MHz ±25% - Enables use of small 1–10µH inductors and compact ceramic capacitors for high-density PCB layouts.
Input Voltage Range	2.5V to 6V - Matches single-cell Li-ion (2.7–4.2V) and dual-cell alkaline/nickel-based battery systems.
Output Current	600mA continuous - Sustains full-rated load under worst-case thermal conditions (T_A = +85°C, θ_JA = 80°C/W).
Feedback Reference	0.600V ±2% - Sets output voltage accuracy for adjustable configurations using external resistive divider.
Shutdown Current	<0.1µA - Minimizes battery drain in system sleep modes without requiring external power gating.
Thermal Shutdown	145°C trip point - Protects die integrity during sustained overload or poor PCB thermal design.
PFET R_DS(on)	0.44Ω - Limits conduction loss at 600mA to ~160mW, critical for efficiency above 3.3V input.
Duty Cycle Range	0–100% - Maintains regulation down to V_IN – V_OUT ≈ 150mV (at 600mA), extending usable battery life.

Pinout & Package

The MP28114DG-LF-P is housed in a thermally enhanced 2mm × 2mm QFN-8 package with exposed thermal pad on the underside, requiring connection to PCB ground plane for optimal thermal performance (θ_JA = 80°C/W, θ_JC = 16°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 SW	Power switch node	Connects to inductor and drains of internal PFET/NFET; carries high di/dt switching current - requires short, low-inductance routing.
2, 3 NC	No connect	Unbonded pins - must remain unconnected per datasheet; no internal circuitry attached.
4 EN	Enable control input	Logic-compatible input: >1.5V enables regulator; <0.3V disables with sub-0.1µA quiescent draw.
5 FB	Feedback sense input	Monitors voltage divider output; internal 0.6V reference sets regulation point for adjustable versions.
6, 8 GND	Ground return	Primary analog and power ground; exposed pad (pin 6/8) must be soldered to large copper area for thermal and EMI control.
7 IN	Input supply	Accepts 2.5–6V; requires local 2.2µF+ ceramic bypass capacitor placed adjacent to pin.

Key Features

Feature	Design Value
Synchronous rectification	Integrated NFET replaces external Schottky diode, raising light-load efficiency by ≥8% and eliminating reverse recovery losses.
100% duty-cycle operation	Enables LDO-like behavior near battery end-of-discharge, sustaining 1.8V output down to 1.95V input at 600mA.
Current-mode control	Provides inherent cycle-by-cycle current limiting and fast transient response (<50µs recovery from 50% load step).
Thermal & short-circuit protection	Auto-recovering shutdown at 145°C and frequency/current-limit reduction during output shorts prevent device damage.
Ultra-small footprint	2mm × 2mm QFN8 occupies 4mm² board area - 40% smaller than comparable 3mm × 3mm converters.

Applications

Cellular and Smart Phones

Microprocessors and DSP Core Supplies

Use Scenario: Powering application processors and baseband ICs in slim smartphones operating from single-cell Li-ion batteries.

IC Role / Device Role / Timing Role: Primary core voltage regulator delivering 1.2V/1.8V at up to 600mA with tight load-transient response.

Use Value: 95% peak efficiency extends talk time; 1.7MHz switching avoids AM radio band interference and shrinks passive size.

Use Scenario: Supplying configurable I/O or memory interface rails in portable embedded microcontrollers.

IC Role / Device Role / Timing Role: Adjustable-output buck converter setting 0.6–3.3V rails via external resistor divider.

Use Value: Pin-compatible flexibility across multiple voltage domains without redesigning PCB layout.

PDAs

Digital Still and Video Cameras

Use Scenario: Providing clean, low-noise power to LCD drivers and touch controllers in handheld PDAs.

IC Role / Device Role / Timing Role: Low-quiescent, high-PSRR DC/DC stage preceding LDOs for analog subsystems.

Use Value: <0.1µA shutdown current preserves battery charge during extended idle periods between user interactions.

Use Scenario: Powering image sensor bias and ISP cores in compact digital cameras with rapid burst-mode current demands.

IC Role / Device Role / Timing Role: High-efficiency step-down regulator handling 100–600mA dynamic loads with minimal output ripple.

Use Value: Slope-compensated current-mode control ensures stability across wide load ranges and prevents subharmonic oscillation.

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
TPS62231DRYR	3MHz switching frequency, 300mA rated output, 0.6V feedback reference, same 2×2mm DSBGA package.	Lower max current limits use in lower-power MCU cores; higher f_SW allows smaller inductors but increases switching loss above 4V input.	Select when board space is tighter than current demand, and input voltage stays >3.0V.
RT8059GJ6	1.5MHz f_SW, 600mA rating, 0.6V reference, 2×2mm QFN6 package with different pinout (no NC pins, shared FB/EN).	QFN6 lacks dedicated SW/GND separation - requires careful layout to avoid noise coupling into feedback path.	Select when cost sensitivity outweighs need for optimal thermal pad grounding and pin isolation.

Compared with TPS62231DRYR and RT8059GJ6, the MP28114DG-LF-P offers superior thermal performance via its dual-GND and exposed-pad QFN8 layout, higher current capability at low input voltages, and dedicated NC pins that simplify routing of noisy SW traces away from analog nodes.

Availability

MP28114DG-LF-P is available at Aetrix Electronics and suitable for cellular phones, portable instrumentation, and digital camera power management requiring stable component supply across production lifecycles.

Supply support for MP28114DG-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 design centers in the US, China, and Taiwan.

The MP28114 belongs to MPS's ultra-compact DC/DC converter product line, engineered specifically for battery-powered portable electronics where efficiency, size, and low-voltage operation are critical system constraints.

FAQ

What is the minimum input voltage required for 600mA output at 1.8V?

The MP28114DG-LF-P sustains 600mA at 1.8V output down to 2.5V input per datasheet specifications. At this condition, the 100% duty-cycle capability and low R_DS(on) values ensure sufficient headroom despite IR drops across internal switches and inductor DCR.

Can the MP28114DG-LF-P be used with an output voltage below 0.6V?

No. The internal feedback reference is fixed at 0.600V ±2%, and the FB pin is designed only for resistive divider configurations yielding V_OUT ≥ 0.6V. Attempting sub-0.6V regulation violates the error amplifier's common-mode input range and causes instability.

How does the EN pin behave during partial enable transitions?

The EN pin has 55mV hysteresis between turn-on (1.5V threshold) and turn-off (0.3V threshold). Input voltages between 0.3V and 1.5V place the device in an undefined state - it may oscillate or latch unpredictably - so clean logic-level drive is mandatory.

Is the exposed thermal pad electrically isolated from internal circuitry?

Yes. The exposed pad is internally connected only to GND. It must be soldered to a PCB ground plane with ≥4 thermal vias (0.3mm diameter) to achieve specified θ_JA = 80°C/W and prevent thermal shutdown under full load.

What happens during output short-circuit events?

Upon short detection, the MP28114DG-LF-P reduces switching frequency and lowers PFET current limit to ~0.7A. This limits fault current and power dissipation. Recovery occurs automatically once the short is removed and FB voltage rises above 0.6V.

Does the MP28114DG-LF-P support forced PWM mode at light loads?

No. The device operates exclusively in PWM mode across all load conditions - there is no pulse-skipping or PFM mode. This ensures constant 1.7MHz switching frequency, predictable EMI profile, and consistent transient response from zero to full load.

MP28114DG-LF-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 8-TFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

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:: 600mA

Frequency - Switching:: 1.7MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-QFN (2x2)

MP28114DG-LF-P FAQ

1.How can I place an order for MP28114DG-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP28114DG-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 MP28114DG-LF-P reliable?

The price and inventory of MP28114DG-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 MP28114DG-LF-P is usually 5 days.

3.What payment methods are accepted for MP28114DG-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP28114DG-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP28114DG-LF-P?

MP28114DG-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP28114DG-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 MP28114DG-LF-P?

For technical support, including MP28114DG-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP28114DG-LF-P requirements.

6.How does Aetrix verify that MP28114DG-LF-P is sourced from the original manufacturer or authorized distributors?

All MP28114DG-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 MP28114DG-LF-P meets industry standards.

7.What is the process for return or replacement of MP28114DG-LF-P?

All MP28114DG-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP28114DG-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 MP28114DG-LF-P part is unused and in its original packaging.

Return procedure for MP28114DG-LF-P:

1.Submit a request within 90 days.

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

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