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Monolithic Power Systems Inc. EV2151-TF-00A

Name: EV2151-TF-00A
Brand: Monolithic Power Systems Inc.
SKU: EV2151-TF-00A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: EV2151-TF-00A

Manufacturer:: Monolithic Power Systems Inc.

Category:: DC/DC & AC/DC (Off-Line) SMPS Evaluation Boards

Package:

Datasheet:: EV2151-TF-00A.pdf

Description:: EVAL BOARD FOR MP2151

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,365

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Product details

Overview

EV2151-TF-00A from Monolithic Power Systems is a 1A synchronous step-down DC/DC converter IC with 25μA quiescent current, 1.1MHz switching frequency, and 2.5V–5.5V input range. It delivers fixed 1.2V output using internal 80mΩ/50mΩ MOSFETs and supports power-good signaling. It is used in battery-powered portable instruments and low-voltage I/O system power rails.

For engineers reviewing the EV2151-TF-00A datasheet, EV2151-TF-00A pinout, EV2151-TF-00A application, or EV2151-TF-00A equivalent, key selection criteria include ultra-low IQ for standby efficiency, fixed-output simplicity with PG flag, thermal shutdown and hiccup-mode short-circuit protection, and SOT563 footprint compatibility in space-constrained designs.

Technical Context

The EV2151-TF-00A implements a Constant-On-Time (COT) control architecture enabling fast load transient response without external compensation. Its integrated high-side and low-side MOSFETs (80mΩ and 50mΩ R_DS(on)) support 100% duty-cycle operation for dropout conditions.

It features enable-controlled sequencing, output discharge, overvoltage protection (OVP), and thermal shutdown. The fixed 1.2V version includes a dedicated Power Good (PG) pin that asserts high when V_OUT is within ±5% of regulation.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 5.5V - supports single-cell Li-ion, Li-poly, or 3.3V/5V rail inputs without pre-regulation
Output Voltage	Fixed 1.2V ±1% - precision FB accuracy enables stable core voltage for low-power MCUs and sensors
Max Output Current	1A continuous - sufficient for SoC subsystems, RF modules, and display drivers
Quiescent Current	25μA - extends battery life in always-on monitoring and IoT endpoint applications
Switching Frequency	1.1MHz - allows use of compact 1.0μH inductors and 22μF ceramic output capacitors
Protection Features	Cycle-by-cycle current limit, thermal shutdown, hiccup-mode short-circuit protection - ensures robust operation under fault conditions
Package	SOT563 (1.6mm × 1.2mm × 0.55mm) - ultra-small footprint for wearables and compact PCB layouts

Pinout & Package

SOT563 package: 6-pin, 0.5mm pitch, exposed thermal pad, moisture sensitivity level 1 (MSL1).

Pin/Terminal	Circuit Role	Design Meaning
VIN	Input Power Supply	Accepts 2.5V–5.5V; requires local 22μF ceramic decoupling
GND	Power Ground	Common return path for input/output currents and thermal pad connection
SW	Switch Node	Connects to external 1.0μH inductor; carries high di/dt switching waveform
FB	Feedback Input	Internally tied to 1.2V reference; not accessible on fixed-output version
EN	Enable Control	Active-high logic input; supports power sequencing with 1.2V logic threshold
PG	Power Good Output	Open-drain signal asserting high when V_OUT ≥ 1.14V (95% of 1.2V)

Key Features

Feature	Design Value
Ultra-low quiescent current	25μA enables >1-year battery life in coin-cell–powered sensor nodes
Integrated power MOSFETs	80mΩ high-side + 50mΩ low-side switches eliminate external FETs and gate drivers
Constant-On-Time control	Enables <10μs load transient recovery without loop compensation components
Output discharge function	Actively discharges V_OUT during shutdown to prevent floating bias in downstream circuitry
Power Good (PG) indicator	Dedicated open-drain output confirms regulated 1.2V delivery before system initialization

Applications

Wireless Networking Cards

Portable Instruments

Use Scenario: Powering 2.4GHz/5GHz Wi-Fi/BT baseband ICs and RF front-end modules in mini-PCIe or M.2 cards.

IC Role / Device Role / Timing Role: Primary 1.2V core supply for SoC and transceiver ICs with strict low-noise and fast-transient requirements.

Use Value: 1.1MHz switching avoids interference with 2.4GHz ISM band; 25μA IQ preserves host platform sleep-state efficiency.

Use Scenario: Providing regulated 1.2V to microcontroller cores and analog front-ends in handheld multimeters and gas detectors.

IC Role / Device Role / Timing Role: Main system regulator delivering clean, stable voltage under varying battery discharge profiles (3.6V → 2.7V).

Use Value: 100% duty-cycle capability maintains regulation down to 2.7V input; thermal shutdown prevents overheating in sealed enclosures.

Battery-Powered Devices

Low-Voltage I/O System Power

Use Scenario: Supplying 1.2V to BLE SoCs and environmental sensors in coin-cell–operated asset trackers.

IC Role / Device Role / Timing Role: Always-on system power rail with deep-sleep current budgeting and wake-up responsiveness.

Use Value: 25μA IQ directly extends 220mAh CR2032 battery life to >15 months at 10s wake interval; EN pin enables MCU-controlled power gating.

Use Scenario: Generating 1.2V for FPGA I/O banks or ASIC interface logic in industrial edge controllers.

IC Role / Device Role / Timing Role: Secondary regulated rail derived from 3.3V main supply, requiring tight tolerance and fast transient immunity.

Use Value: ±1% FB accuracy ensures reliable LVCMOS12 signaling; PG signal synchronizes FPGA configuration with stable VCCIO.

Availability

EV2151-TF-00A is available at Aetrix Electronics and suitable for wireless networking cards, portable instruments, and battery-powered devices requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for EV2151-TF-00A 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 across Asia and North America.

The MP2151 product line delivers ultra-low-IQ, small-footprint DC/DC converters for space- and energy-constrained portable and IoT applications, emphasizing integration, reliability, and ease of use.

FAQ

What is the function of the PG pin on EV2151-TF-00A?

The PG (Power Good) pin is an open-drain output that goes high when the regulated 1.2V output reaches and remains within ±5% (1.14V–1.26V) of nominal. It provides system-level power sequencing feedback and must be pulled up externally to VIN or another valid logic rail to operate correctly.

Can EV2151-TF-00A operate with input voltage below 3.3V?

Yes - it operates from 2.5V to 5.5V. However, the documentation notes that VIN < 3.3V may require increased input capacitance (e.g., ≥44μF total) to maintain stability under full 1A load due to higher input current ripple at lower VIN.

Does EV2151-TF-00A support adjustable output voltage?

No - EV2151-TF-00A is the fixed 1.2V version. Adjustable versions (e.g., MP2151GTF) use external resistor dividers on the FB pin; this board variant ties FB internally and omits those resistors per the BOM.

What is the thermal performance of EV2151-TF-00A in SOT563?

In typical 2-layer PCB layout with 1-in² copper pour connected to the exposed thermal pad, the device achieves θ_JA ≈ 120°C/W. Full 1A load at 5V input yields ~45°C junction rise above ambient, well within the 150°C thermal shutdown threshold.

Is output discharge active during EN deassertion?

Yes - the IC actively sinks current from the output capacitor via the low-side MOSFET when EN is pulled low, discharging V_OUT to near 0V within milliseconds. This prevents unintended biasing of downstream logic or analog circuitry during power-down sequences.

How does the Constant-On-Time control affect EMI behavior?

COT control results in variable-frequency operation under light loads, spreading energy across a wider spectrum and reducing peak EMI amplitudes. At 1.1MHz nominal, switching remains above AM radio bands, and the fixed-frequency nature at medium-to-heavy loads simplifies EMI filter design.

EV2151-TF-00A Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Packaging:: Box

Product Status:: Active

Main Purpose:: DC/DC, Step Down

Outputs and Type:: 1 Non-Isolated Output

Voltage - Output:: -

Current - Output:: 1.2V

Voltage - Input:: 1A

Regulator Topology:: 2.5V ~ 5.5V

Frequency - Switching:: Buck

Contents:: 1.1MHz

Utilized IC / Part:: Board(s)

Power - Output:: MP2151

EV2151-TF-00A FAQ

1.How can I place an order for EV2151-TF-00A through Aetrix?

Please submit a Request for Quotation (RFQ) for EV2151-TF-00A 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 EV2151-TF-00A reliable?

The price and inventory of EV2151-TF-00A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EV2151-TF-00A is usually 5 days.

3.What payment methods are accepted for EV2151-TF-00A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EV2151-TF-00A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for EV2151-TF-00A?

EV2151-TF-00A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your EV2151-TF-00A 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 EV2151-TF-00A?

For technical support, including EV2151-TF-00A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EV2151-TF-00A requirements.

6.How does Aetrix verify that EV2151-TF-00A is sourced from the original manufacturer or authorized distributors?

All EV2151-TF-00A 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 EV2151-TF-00A meets industry standards.

7.What is the process for return or replacement of EV2151-TF-00A?

All EV2151-TF-00A units undergo pre-shipment inspection (PSI). If there is an issue with EV2151-TF-00A, 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 EV2151-TF-00A part is unused and in its original packaging.

Return procedure for EV2151-TF-00A:

1.Submit a request within 90 days.

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

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