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

Diodes Incorporated PAM2303AJEADJR_01

Name: PAM2303AJEADJR_01
Brand: Diodes Incorporated
SKU: PAM2303AJEADJR_01
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PAM2303AJEADJR_01

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: -

Datasheet:: PAM2303AJEADJR_01.pdf

Description:: IC REG

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Product details

Overview

PAM2303AJEADJR_01 from Diodes Incorporated is a 3A synchronous step-down DC-DC converter with adjustable output (0.6V to VIN), 1.5MHz fixed-frequency PWM/PSM dual-mode operation, internal 85mΩ high-side and 60mΩ low-side MOSFETs, and 42µA no-load quiescent current - deployed in DDR power supplies and telecom point-of-load systems.

For engineers reviewing the PAM2303AJEADJR_01 datasheet, PAM2303AJEADJR_01 pinout, PAM2303AJEADJR_01 application, or PAM2303AJEADJR_01 equivalent, key selection criteria include input voltage range (2.7–5.5V), 100% duty cycle capability for low-dropout operation, thermal shutdown at 150°C, and QFN3x3-16 package thermal resistance (θJA = 35°C/W).

Technical Context

The PAM2303AJEADJR_01 integrates a 1.5MHz oscillator, analog soft-start circuit, and internal error amplifier with 0.6V reference for feedback regulation. It implements automatic mode transition between pulse-skipping (PSM) at light load and constant-frequency PWM at heavy load to maintain efficiency across 0–3A output range.

Its synchronous rectification architecture uses ultra-low R_DS(ON) integrated MOSFETs and supports 100% duty cycle operation, enabling V_OUT = V_IN − I_LOAD(R_DS(ON) + R_L). Protection includes cycle-by-cycle current limiting (4A typ), over-temperature shutdown (150°C trip, 120°C recovery), and UVLO (2.5V rising threshold with 240mV hysteresis).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	3A maximum continuous - supports high-current DDR memory rails and video card core supplies.
Input Voltage Range	2.7V to 5.5V - compatible with single-cell Li-ion, USB-powered, and 3.3V/5V system rails.
Output Voltage Range	0.6V to VIN - enables precise core voltage scaling down to sub-1V logic domains.
Switching Frequency	1.5MHz (typ) - allows compact external LC filter design with ≤2.2µH inductors.
Quiescent Current	42µA (typ) at no load - minimizes standby power loss in always-on subsystems.
Efficiency	Up to 95% - achieved via synchronous rectification and low R_DS(ON) MOSFETs.
Shutdown Current	<1µA - ensures battery isolation during deep sleep in portable equipment.
Thermal Shutdown	150°C junction trip with 30°C hysteresis - prevents permanent damage under sustained overload.

Pinout & Package

Package: QFN3x3-16 (exposed pad, 1.90×1.90mm DAP), RoHS-compliant, moisture sensitivity level 3.

Pin/Terminal	Circuit Role	Design Meaning
PGND (Pins 1,2,3)	Main power ground	Low-impedance return path for high-current switch node; must be connected to exposed thermal pad.
FB (Pin 4)	Feedback input	Senses output voltage via resistor divider; internal 0.6V reference sets regulation threshold.
GND (Pin 5)	Signal ground	Reference for control circuitry; isolated from PGND to reduce noise coupling into error amplifier.
NC (Pins 6,16)	No connect	Not internally bonded; must remain unconnected on PCB to avoid parasitic coupling.
EN (Pin 7)	Enable control	Logic-level input: >1.5V enables regulator, <0.3V forces shutdown with <1µA supply current.
VIN (Pin 9)	Bias supply	Powers internal LDO and control logic; decoupled separately from PVIN to stabilize gate drive.
PVIN (Pins 10,11,12)	Power input	High-current input for power stage; requires local 10µF ceramic capacitor to PGND.
SW (Pins 13,14,15)	Switch node	Drain connection of internal high-side and low-side MOSFETs; drives external inductor.

Key Features

Feature	Design Value
Integrated Synchronous Power Stage	85mΩ high-side + 60mΩ low-side MOSFETs eliminate external diode losses and enable >95% peak efficiency.
Automatic PSM/PWM Mode Transition	Seamless shift at ~450mA load (VIN=3.3V, VOUT=1.2V) maintains >85% efficiency from 1mA to 3A.
Analog Soft-Start	0.5ms controlled ramp-up prevents inrush current and output overshoot during enable.
No External Compensation Required	Internally compensated error amplifier simplifies layout and eliminates stability tuning effort.
100% Duty Cycle Operation	Enables dropout-free regulation when V_IN ≈ V_OUT, critical for battery-powered systems near end-of-discharge.

Applications

DDR Memory Power Supply

5V-to-1.2V Point-of-Load Conversion

Use Scenario: Providing tightly regulated 1.2V core voltage to DDR3/DDR4 memory modules in servers and networking gear.

IC Role / Device Role / Timing Role: Primary buck regulator delivering 3A continuous current with fast transient response to memory burst loads.

Use Value: 1.5MHz switching frequency enables small 2.2µH inductor; 42µA quiescent current reduces idle power in memory standby states.

Use Scenario: Converting 5V system rail to 1.2V logic supply for FPGA I/O banks or ASIC cores in telecom line cards.

IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter operating in PWM mode under full load with minimal thermal rise.

Use Value: QFN3x3-16 package (θJA = 35°C/W) sustains 3A output at +85°C ambient without forced airflow.

Set-Top Box SoC Core Supply

Storage Controller Power Rail

Use Scenario: Generating 0.9V–1.1V adaptive core voltage for media processor SoCs in consumer set-top boxes.

IC Role / Device Role / Timing Role: Adjustable-output buck regulator supporting dynamic voltage scaling (DVS) via FB resistor network.

Use Value: 0.6V internal reference and wide V_OUT range (0.6V–V_IN) allow precise sub-1V regulation with ±3% accuracy.

Use Scenario: Powering SATA/NVMe controller ICs requiring stable 1.8V or 3.3V rails in enterprise SSDs and NAS enclosures.

IC Role / Device Role / Timing Role: Robust DC-DC converter with short-circuit protection (4A current limit) and thermal shutdown.

Use Value: Cycle-by-cycle current limiting and 150°C thermal shutdown prevent catastrophic failure during hot-plug or ESD events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down DC-DC converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2307DN-LF-Z (Monolithic Power)	2.5A max output, 34µA IQ, 500kHz–1.5MHz adjustable frequency, requires external compensation.	Limited to 2.5A; lower thermal performance (θJA = 50°C/W in MSOP-8) restricts use in high-ambient industrial designs.	Select when lower cost and adjustable frequency outweigh need for 3A rating and integrated compensation.
TPS62231DRYT (Texas Instruments)	3A output, 17µA IQ, 3MHz fixed frequency, 0.6V reference, but only supports 2.05–6.5V input range.	Higher minimum input (2.05V) excludes single-cell LiFePO₄ (1.8–3.6V) applications where PAM2303AJEADJR_01 operates down to 2.7V.	Prefer for ultra-low-IQ battery-powered devices with ≥3V input; avoid for 2.7V–3.3V narrow-input systems.

Compared with MP2307DN-LF-Z and TPS62231DRYT, the PAM2303AJEADJR_01 uniquely combines 3A output, 2.7V minimum input, integrated compensation, and QFN3x3-16's 35°C/W thermal resistance - making it optimal for space-constrained, high-current, low-input-voltage PoL designs.

Availability

PAM2303AJEADJR_01 is available at Aetrix Electronics and suitable for DDR memory power supplies, telecom point-of-load conversion, and set-top box SoC core supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for PAM2303AJEADJR_01 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and power management ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the U.S.

The PAM2303 belongs to Diodes' Power Management product line, engineered specifically for high-efficiency, high-current DC-DC conversion in space-constrained consumer, computing, and communications equipment.

FAQ

What is the minimum input voltage required for PAM2303AJEADJR_01 to regulate output?

The PAM2303AJEADJR_01 requires a minimum input voltage of 2.7V to maintain regulation across its full output range (0.6V to VIN). Below this, UVLO activates at 2.4V (rising threshold), disabling the device until VIN exceeds 2.5V with 240mV hysteresis. This ensures reliable startup from single-cell Li-ion or USB 2.0 sources.

How does the PAM2303AJEADJR_01 achieve 100% duty cycle operation?

The PAM2303AJEADJR_01 achieves 100% duty cycle by fully turning on the internal high-side P-channel MOSFET when V_IN approaches V_OUT. In this mode, V_OUT = V_IN − I_LOAD(R_DS(ON) + R_L), where R_DS(ON) is 85mΩ. This eliminates dropout voltage limitations typical of non-synchronous or NMOS-based buck converters.

Can the PAM2303AJEADJR_01 be used with ceramic output capacitors?

Yes - the PAM2303AJEADJR_01 is fully compatible with X5R/X7R ceramic output capacitors. Its internal compensation and absence of external ESR requirements allow stable operation with low-ESR ceramics. Recommended values are ≥22µF for 1.8V output, sized to meet ripple ΔV_OUT ≈ ΔI_L × ESR specification.

What is the purpose of separate VIN and PVIN pins on the QFN3x3-16 package?

VIN powers the internal bias LDO and control logic, while PVIN supplies the high-current power stage. Separating these paths prevents switching noise from PVIN from modulating the control circuitry's supply, improving PSRR and loop stability. Each requires independent 10µF ceramic decoupling to PGND, with PVIN placed closest to the SW node.

PAM2303AJEADJR_01 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

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Packaging:: Bulk

Product Status:: Obsolete

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Frequency - Switching:: -

Synchronous Rectifier:: -

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PAM2303AJEADJR_01 FAQ

1.How can I place an order for PAM2303AJEADJR_01 through Aetrix?

Please submit a Request for Quotation (RFQ) for PAM2303AJEADJR_01 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 PAM2303AJEADJR_01 reliable?

The price and inventory of PAM2303AJEADJR_01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2303AJEADJR_01 is usually 5 days.

3.What payment methods are accepted for PAM2303AJEADJR_01?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2303AJEADJR_01 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PAM2303AJEADJR_01?

PAM2303AJEADJR_01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PAM2303AJEADJR_01 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 PAM2303AJEADJR_01?

For technical support, including PAM2303AJEADJR_01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2303AJEADJR_01 requirements.

6.How does Aetrix verify that PAM2303AJEADJR_01 is sourced from the original manufacturer or authorized distributors?

All PAM2303AJEADJR_01 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 PAM2303AJEADJR_01 meets industry standards.

7.What is the process for return or replacement of PAM2303AJEADJR_01?

All PAM2303AJEADJR_01 units undergo pre-shipment inspection (PSI). If there is an issue with PAM2303AJEADJR_01, 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 PAM2303AJEADJR_01 part is unused and in its original packaging.

Return procedure for PAM2303AJEADJR_01:

1.Submit a request within 90 days.

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

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