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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Monolithic Power Systems Inc. MP20049DC-2.8-LF-Z

Name: MP20049DC-2.8-LF-Z
Brand: Monolithic Power Systems Inc.
SKU: MP20049DC-2.8-LF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP20049DC-2.8-LF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 4-UFBGA, WLCSP

Datasheet:: MP20049DC-2.8-LF-Z.pdf

Description:: IC REG LINEAR 2.8V 150MA 4WLCSP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP20049DC-2.8-LF-Z from Monolithic Power Systems is an ultra-low-noise, high-PSRR 150mA linear regulator in a 0.8×0.8mm WLCSP package, delivering fixed 2.8V output with ±1% accuracy across –40°C to +125°C. It operates from 2.3V–6V input, achieves 16µV_RMS output noise (100Hz–100kHz) without bypass capacitor, and maintains stability with only 1µF ceramic output capacitance-ideal for noise-sensitive RF and analog signal chains in compact portable devices.

For engineers reviewing the MP20049DC-2.8-LF-Z datasheet, MP20049DC-2.8-LF-Z pinout, MP20049DC-2.8-LF-Z application, or MP20049DC-2.8-LF-Z equivalent, key selection criteria include dropout voltage at 120mA/150mA, PSRR at 1kHz/100kHz, thermal shutdown threshold, EN logic thresholds, and WLCSP ball mapping for PCB layout validation.

Technical Context

The MP20049 employs an internal PMOS pass element enabling low dropout (50mV @120mA) and ultra-low quiescent current (40–75μA over temperature). Its architecture integrates a precision 1.23V reference, error amplifier with V_REF filtering, and independent thermal shutdown (150°C trip, 20°C hysteresis) plus current limiting (165–380mA).

It achieves 78dB PSRR at 1kHz and 55dB at 100kHz via on-die compensation and optimized loop dynamics, while its 16µV_RMS noise stems from an internal 50pF bypass structure eliminating external noise-reduction capacitors-enabling stable operation with minimal 1µF ceramic output capacitance across full load range.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±1% - ensures precise biasing for RF transceivers and ADC references without external feedback.
Input Voltage Range	2.3V to 6.0V - supports single-cell Li-ion (2.7–4.2V), LiFePO₄, and post-DC/DC regulation from 3.3V/5V rails.
Max Output Current	150mA continuous - sufficient for powering low-power microcontrollers, sensors, or RF front-end ICs in space-constrained designs.
Dropout Voltage	50mV @120mA, 60mV @150mA - extends battery runtime by maintaining regulation down to ~2.7V under full load.
Output Noise	16µV_RMS (100Hz–100kHz), no bypass cap required - eliminates need for external 10nF–100nF noise-reduction capacitors, saving board area and BOM cost.
PSRR	78dB @1kHz, 55dB @100kHz - suppresses switching noise from upstream DC/DC converters, critical for clean power in audio and wireless receivers.
Quiescent Current	40–75μA over –40°C to +85°C - minimizes standby power loss in always-on sensor nodes and wearable devices.

Pinout & Package

MP20049DC-2.8-LF-Z uses a 4-ball 0.8×0.8mm WLCSP (Wafer-Level Chip Scale Package) with bottom-side solder balls and pin 1 identification mark. The package is JEDEC MO-211 AA compliant, with 0.4mm ball pitch and coplanarity ≤0.05mm.

Pin/Terminal	Circuit Role	Design Meaning
VIN (A1)	Regulator Input Supply	Accepts 2.3–6V input; requires ≥1µF ceramic bypass to GND for line transient immunity and EMI suppression.
GND (B2)	Ground Reference	Primary return path for load current and internal circuitry; must connect to large PCB ground plane for thermal dissipation and noise control.
EN (B1)	Enable Control Input	Logic-level enable: VIH ≥1.2V (VIN=3.3–5.5V), VIL ≤0.4V; tie to VIN for always-on operation; never float.
VOUT (A2)	Regulated Output	Delivers stable 2.8V ±1%; requires ≥1µF ceramic capacitor to GND for stability and load transient response.

Key Features

Feature	Design Value
Ultra-low output noise	16µV_RMS (100Hz–100kHz) without external bypass capacitor - reduces component count and PCB area in noise-critical analog/RF sections.
High PSRR at mid-band	78dB at 1kHz - effectively attenuates ripple from switching regulators operating near 1kHz fundamental frequencies.
Low dropout with PMOS pass	50mV @120mA - enables use with deeply discharged batteries while maintaining system functionality.
Thermal protection with hysteresis	150°C shutdown with 20°C recovery gap - prevents latch-up during sustained overload and allows safe auto-recovery.
Stable with minimal output capacitance	1µF ceramic capacitor sufficient for all loads - simplifies layout and avoids ESR sensitivity issues common with polymer/tantalum caps.

Applications

Cellular Mobile Phones

Digital Cameras

Use Scenario: Powering RF transceiver LNA and mixer stages in LTE/WCDMA front-ends where supply noise directly impacts receiver sensitivity and adjacent channel rejection.

IC Role / Device Role / Timing Role: Low-noise post-regulator supplying clean 2.8V bias to analog RF blocks downstream of noisy buck converters.

Use Value: 16µV_RMS noise and 78dB PSRR prevent degradation of SNR and ACLR performance in cellular bands.

Use Scenario: Providing regulated 2.8V to CMOS image sensor analog core and ADC reference circuits during high-speed burst capture.

IC Role / Device Role / Timing Role: Precision voltage source for analog signal chain elements requiring sub-mV ripple and fast load transient response.

Use Value: 1µF-stable operation and 50mV dropout ensure consistent image quality across battery discharge and rapid pixel readout current spikes.

Wireless LAN Modules

Handheld Medical Sensors

Use Scenario: Supplying 2.8V to Wi-Fi/BT SoC RF sections and crystal oscillator buffers in compact IoT edge nodes.

IC Role / Device Role / Timing Role: Ultra-small footprint LDO delivering clean power to timing-critical RF subsystems in space-limited modules.

Use Value: 0.8×0.8mm WLCSP enables integration into <5mm² modules without sacrificing PSRR or noise performance.

Use Scenario: Powering low-power biosignal amplifiers (ECG/PPG) and precision ADCs in battery-operated wearable monitors.

IC Role / Device Role / Timing Role: Low-quiescent-current LDO ensuring >7-day battery life while maintaining analog signal integrity.

Use Value: 40–75μA IQ over temperature and ±1% output accuracy preserve measurement fidelity and calibration stability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-noise LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6210B282MR-G	2.8V fixed, 150mA, 25µV_RMS noise, requires 2.2µF output cap, 65mV dropout @150mA	Higher noise and larger minimum C_OUT reduce suitability for RF-sensitive designs	Select if lower cost is prioritized over noise performance and board area.
Analog Devices ADP160ACBZ-2.8-R7	2.8V fixed, 150mA, 22µV_RMS noise, 165mV dropout @150mA, 6-ball 1.2×1.2mm WLCSP	Higher dropout limits usable battery range; larger package increases layout footprint	Select only when ADI ecosystem compatibility or specific qualification requirements mandate its use.

Compared with XC6210B282MR-G and ADP160ACBZ-2.8-R7, MP20049DC-2.8-LF-Z delivers the lowest output noise (16µV_RMS) and smallest footprint (0.8×0.8mm), with the lowest dropout (60mV @150mA), making it optimal for space- and noise-constrained portable RF systems.

Availability

MP20049DC-2.8-LF-Z is available at Aetrix Electronics and suitable for cellular mobile phones, digital cameras, wireless LAN modules, and handheld medical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP20049DC-2.8-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 MP20049 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for noise-sensitive analog and RF subsystems in battery-powered portable electronics where minimal footprint and maximum PSRR are critical.

FAQ

What is the recommended input and output capacitor configuration for MP20049DC-2.8-LF-Z?

A minimum 1µF X5R/X7R ceramic capacitor is required on both input and output pins, placed as close as possible to the device. Larger values improve transient response but increase board area; tantalum capacitors are acceptable but not preferred due to higher ESR and reliability concerns.

Does MP20049DC-2.8-LF-Z require an external noise bypass capacitor?

No. The MP20049 integrates an internal 50pF bypass structure that achieves 16µV_RMS output noise (100Hz–100kHz) without any external noise-reduction capacitor-reducing BOM count and PCB area versus conventional LDOs.

What is the EN pin behavior and recommended interface logic?

The EN pin is active-high with VIH ≥1.2V and VIL ≤0.4V (for VIN = 3.3–5.5V). To enable the regulator, drive EN ≥1.2V; to disable, drive EN ≤0.4V or tie to GND. Never leave EN floating-connect to VIN for always-on operation.

How does thermal protection operate during overload conditions?

When junction temperature exceeds 150°C, the MP20049 shuts down the PMOS pass element. After cooling by 20°C (to ~130°C), it automatically resumes regulation. This hysteresis prevents thermal cycling and ensures safe recovery without external intervention.

Can MP20049DC-2.8-LF-Z be used with input voltages below 2.3V?

No. The device incorporates an under-voltage lockout (UVLO) that disables regulation when VIN falls below ~2.3V. Below this threshold, VOUT is unregulated and EN functionality is suspended-ensuring predictable behavior during brown-out conditions.

What is the maximum allowable power dissipation at +85°C ambient?

Using θ_JA = 330°C/W and T_J(MAX) = 125°C, maximum continuous power dissipation at T_A = +85°C is PD_MAX = (125 − 85)/330 ≈ 121mW. For example, at VIN = 4.2V and VOUT = 2.8V, max sustainable load current is ~86mA.

Is MP20049DC-2.8-LF-Z compatible with lead-free reflow processes?

Yes. The "-LF" suffix indicates RoHS-compliant, lead-free packaging. It supports standard Pb-free reflow profiles per J-STD-020, with peak temperature up to 260°C for 30 seconds and MSL level 1 rating-no floor life limitation when sealed.

MP20049DC-2.8-LF-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 4-UFBGA, WLCSP

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 2.8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.12V @ 120mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 75 µA

Current - Supply (Max):: -

PSRR:: 78dB ~ 55dB (1kHz ~ 100kHz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 4-WLCSP (0.82x0.82)

MP20049DC-2.8-LF-Z FAQ

1.How can I place an order for MP20049DC-2.8-LF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP20049DC-2.8-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 MP20049DC-2.8-LF-Z reliable?

The price and inventory of MP20049DC-2.8-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 MP20049DC-2.8-LF-Z is usually 5 days.

3.What payment methods are accepted for MP20049DC-2.8-LF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP20049DC-2.8-LF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP20049DC-2.8-LF-Z?

MP20049DC-2.8-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP20049DC-2.8-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 MP20049DC-2.8-LF-Z?

For technical support, including MP20049DC-2.8-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP20049DC-2.8-LF-Z requirements.

6.How does Aetrix verify that MP20049DC-2.8-LF-Z is sourced from the original manufacturer or authorized distributors?

All MP20049DC-2.8-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 MP20049DC-2.8-LF-Z meets industry standards.

7.What is the process for return or replacement of MP20049DC-2.8-LF-Z?

All MP20049DC-2.8-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP20049DC-2.8-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 MP20049DC-2.8-LF-Z part is unused and in its original packaging.

Return procedure for MP20049DC-2.8-LF-Z:

1.Submit a request within 90 days.

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

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