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

Diodes Incorporated PAM2303AJEADJR

Name: PAM2303AJEADJR
Brand: Diodes Incorporated
SKU: PAM2303AJEADJR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PAM2303AJEADJR

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 16-VFQFN Exposed Pad

Datasheet:: PAM2303AJEADJR.pdf

Description:: IC REG BUCK ADJ 3A 16QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PAM2303AJEADJR from Diodes Incorporated is a 3A synchronous step-down DC-DC converter in QFN3x3-16 package, operating from 2.7V–5.5V input and delivering adjustable 0.6V–VIN output with 1.5MHz fixed-frequency PWM/PSM hybrid control, 42µA no-load quiescent current, and integrated 85mΩ/60mΩ MOSFETs-used in DDR power supplies and telecom point-of-load conversion.

For engineers reviewing the PAM2303AJEADJR datasheet, PAM2303AJEADJR pinout, PAM2303AJEADJR application, or PAM2303AJEADJR equivalent, key selection criteria include its 100% duty-cycle capability for low-dropout operation, thermal shutdown at +150°C, UVLO threshold of 2.4V, analog soft-start time of 0.5ms, and FB reference voltage accuracy of ±3%.

Technical Context

The PAM2303AJEADJR implements a dual-mode control architecture: pulse-skipping mode (PSM) at light load for efficiency optimization and constant-frequency PWM at heavy load for stable regulation and fast transient response. Its internal error amplifier compares 0.6V feedback reference against FB pin voltage to regulate output.

It integrates high-side and low-side synchronous MOSFETs with R_DS(ON) of 85mΩ and 60mΩ respectively, supports 100% duty cycle for near-dropout operation, and features cycle-by-cycle current limiting at 4A with over-temperature protection that disables switching above +150°C and resumes at +120°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.7V to 5.5V - supports single-cell Li-ion, USB-powered, and 3.3V/5V rail inputs without external LDO pre-regulation.
Output Voltage Range	0.6V to VIN - enables direct generation of DDR1/2/3/4 VDDQ (1.2V–1.5V), core logic (0.8V–1.2V), and I/O rails.
Max Output Current	3A continuous - sufficient for FPGA I/O banks, ASIC cores, and multi-lane SerDes power domains.
Switching Frequency	1.5MHz (typ) - allows use of compact 2.2µH inductors and ceramic capacitors under 1210 size for space-constrained PCBs.
Quiescent Current	42µA (typ) - minimizes standby power loss in always-on subsystems like network management controllers.
Feedback Reference	0.600V ±1.5% - sets output accuracy via external resistor divider; enables ±3% total VO regulation over line/load/temperature.
UVLO Threshold	2.4V rising, 1.8V falling - prevents erratic startup during battery sag and ensures clean power-up sequencing.

Pinout & Package

Package: QFN3x3-16, thermally enhanced with exposed pad (DAP: 1.90×1.90mm), θ_JA = 35°C/W per JEDEC 2-layer board.

Pin/Terminal	Circuit Role	Design Meaning
PGND (1,2,3)	Main power ground	Low-impedance return path for high-current switch node; must be connected directly to exposed pad and solid ground plane.
FB (4)	Feedback input	Senses output voltage via resistor divider; internal 0.6V reference sets regulation point; leakage <±50nA avoids divider error.
GND (5)	Signal ground	Reference for EN, Test, and internal bias circuits; separate from PGND to avoid noise coupling into error amplifier.
NC (6,16)	No connect	Unbonded die pads; must remain floating-no routing or solder mask opening required.
EN (7)	Enable control	Active-high logic input; 1.5V threshold enables regulator; <0.3V forces shutdown with <1µA supply current.
VIN (9)	Bias supply	Powers internal LDO and gate drivers; decoupled with 10µF ceramic; independent of PVIN for stability.
PVIN (10,11,12)	Power input	High-current input for power stage; requires local 33µF low-ESR ceramic and tight loop to PGND.
SW (13,14,15)	Switch node	Drain connection of internal high-side and low-side MOSFETs; drives external inductor; high dv/dt node requiring guard ring.

Key Features

Feature	Design Value
No external compensation required	Internal Type-II compensation eliminates need for external RC network-reduces BOM count and layout sensitivity.
Analog soft-start	0.5ms monotonic output ramp prevents inrush current and input rail collapse during power-up.
100% duty-cycle operation	Enables dropout operation down to V_OUT = V_IN – I_LOAD×(85mΩ + L_DCR)-critical for battery-powered systems near end-of-discharge.
Integrated MOSFETs	85mΩ high-side and 60mΩ low-side R_DS(ON) deliver >95% peak efficiency at 3A/1.2V out from 3.6V in.
Thermal shutdown with hysteresis	Shuts down at +150°C junction; restarts at +120°C-prevents thermal runaway while allowing recovery without system reset.

Applications

DDR Memory Power Supply

5V Point-of-Load Conversion

Use Scenario: Providing regulated 1.2V/1.35V/1.5V to DDR3/DDR4 memory modules on server DIMMs and embedded SoM carriers.

IC Role / Device Role / Timing Role: Primary buck regulator delivering 3A continuous current with tight load-transient response to meet JEDEC VDDQ slew rate requirements.

Use Value: 1.5MHz switching frequency enables small 2.2µH inductors and low-ESR ceramic caps, reducing solution size by >40% vs. 500kHz alternatives.

Use Scenario: Converting 5V USB or backplane rail to 3.3V for Ethernet PHYs, USB controllers, and MCU peripherals in networking gear.

IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter operating in PSM mode during link-idle states to extend system standby time.

Use Value: 42µA quiescent current reduces no-load power to <210µW, enabling compliance with Energy Star Level VI and EU CoC Tier 2 standby limits.

Set-Top Box SoC Core Rail

Telecom Line Card Bias Supply

Use Scenario: Generating 0.8V–1.1V core voltage for ARM-based media processors in IPTV and streaming devices with dynamic DVFS scaling.

IC Role / Device Role / Timing Role: Adaptive voltage regulator responding to processor load changes via FB pin; supports 100% duty cycle during low-VIN brownout conditions.

Use Value: UVLO hysteresis (240mV) prevents oscillation during input droop, ensuring clean reset-free operation during AC adapter plug/unplug events.

Use Scenario: Delivering 2.5V/3.3V bias to optical transceivers (SFP+, QSFP) and packet-switching ASICs in carrier-grade line cards.

IC Role / Device Role / Timing Role: Robust PoL converter with cycle-by-cycle current limit (4A) and thermal shutdown protecting against fiber fault-induced short-circuit loads.

Use Value: Integrated 85mΩ/60mΩ MOSFETs eliminate external FET drive complexity and reduce conduction losses by 35% vs. controller+discrete-FET solutions.

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
AP61300WS6-7	Higher 6A rating, 2.5V–6V input, 0.8V–5.5V output, 25µA IQ, QFN2x2-8 package	Supports higher current and wider VIN range; smaller footprint but lower thermal margin at 3A continuous	Preferred for new designs requiring higher headroom or space reduction; not pin-compatible with PAM2303AJEADJR
TPS62231DRYT	3A, 2.05V–6.5V input, 0.6V–5.5V output, 24µA IQ, 2.9MHz switching, WSON-10 package	Higher frequency enables smaller passives; lacks 100% duty cycle and has lower R_DS(ON) (110mΩ/70mΩ)	Best for ultra-compact layouts where 2.9MHz operation is acceptable; requires revalidation of EMI filtering

Compared with AP61300WS6-7 and TPS62231DRYT, the PAM2303AJEADJR offers superior thermal performance in QFN3x3-16 (θ_JA = 35°C/W) and proven 100% duty-cycle capability for battery-sag resilience-making it suitable for legacy designs where thermal density and dropout behavior are critical.

Availability

PAM2303AJEADJR is available at Aetrix Electronics and suitable for DDR memory power supplies, 5V point-of-load conversion, and telecom line card bias supplies requiring stable component supply across extended product lifecycles.

Supply support for PAM2303AJEADJR 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 ICs, specializing in power management, signal integrity, and protection solutions for industrial, computing, and communications markets.

The PAM2303 belongs to Diodes' high-efficiency synchronous buck converter product line, designed specifically for space-constrained, high-current point-of-load applications demanding low quiescent current and robust thermal performance.

FAQ

What is the recommended inductor value for PAM2303AJEADJR at 1.2V/3A output from 3.6V input?

A 1.0µH inductor is recommended for 1.2V output, based on Diodes' application guidance and ripple current target of 1.2A (40% of 3A). Use a shielded power inductor rated ≥4.2A DC current with low DCR (<20mΩ) to minimize conduction loss and ensure stable operation under full load.

How does the PAM2303AJEADJR handle short-circuit conditions?

Under output short circuit, the device enters 500kHz minimum-duty-cycle operation with cycle-by-cycle current limiting at 4A typical. This limits average input current to safe levels while maintaining thermal shutdown at +150°C as secondary protection-preventing damage during sustained fault conditions.

Can the PAM2303AJEADJR operate with input voltage equal to output voltage?

Yes-it supports true 100% duty-cycle operation, allowing V_OUT = V_IN – I_LOAD × (85mΩ + L_DCR). This enables stable regulation down to input voltages only slightly above output, critical for Li-ion battery systems operating near end-of-discharge (e.g., 3.2V → 3.0V).

Is the FB pin internally compensated, and what is its input bias current?

The FB pin connects directly to the high-impedance input of an internal error amplifier with ±50nA max leakage current at 1V. No external compensation is needed-the device uses internal Type-II compensation, simplifying design and eliminating stability risks from external component variation.

PAM2303AJEADJR Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 16-VFQFN 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):: 2.7V

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 0.6V

Voltage - Output (Max):: 5.5V

Current - Output:: 3A

Frequency - Switching:: 1.5MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QFN (3x3)

PAM2303AJEADJR FAQ

1.How can I place an order for PAM2303AJEADJR through Aetrix?

Please submit a Request for Quotation (RFQ) for PAM2303AJEADJR 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 reliable?

The price and inventory of PAM2303AJEADJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2303AJEADJR is usually 5 days.

3.What payment methods are accepted for PAM2303AJEADJR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2303AJEADJR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PAM2303AJEADJR?

PAM2303AJEADJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PAM2303AJEADJR 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?

For technical support, including PAM2303AJEADJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2303AJEADJR requirements.

6.How does Aetrix verify that PAM2303AJEADJR is sourced from the original manufacturer or authorized distributors?

All PAM2303AJEADJR 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 meets industry standards.

7.What is the process for return or replacement of PAM2303AJEADJR?

All PAM2303AJEADJR units undergo pre-shipment inspection (PSI). If there is an issue with PAM2303AJEADJR, 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 part is unused and in its original packaging.

Return procedure for PAM2303AJEADJR:

1.Submit a request within 90 days.

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

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