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

Diodes Incorporated PAM2303BECADJR

Name: PAM2303BECADJR
Brand: Diodes Incorporated
SKU: PAM2303BECADJR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PAM2303BECADJR

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Datasheet:: PAM2303BECADJR.pdf

Description:: IC REG BUCK ADJ 3A 8SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PAM2303BECADJR from Diodes Incorporated is a 3A synchronous step-down DC-DC converter with adjustable output (0.6V to VIN), 2.7–5.5V input range, 1.5MHz fixed-frequency PWM/PSM dual-mode operation, and integrated 85mΩ/60mΩ MOSFETs in SOP-8EP package. It delivers high efficiency (up to 95%) and ultra-low 42µA no-load quiescent current for point-of-load power in space-constrained telecom and storage systems.

For engineers reviewing the PAM2303BECADJR datasheet, PAM2303BECADJR pinout, PAM2303BECADJR application, or PAM2303BECADJR equivalent, key selection criteria include its 100% duty cycle capability, internal compensation, thermal shutdown at 150°C, and SOP-8EP thermal resistance (θJA = 90°C/W) for board-level thermal design validation.

Technical Context

The PAM2303BECADJR employs a voltage-mode PWM controller with analog soft-start and automatic transition between pulse-skipping mode (PSM) at light load and constant-frequency PWM at heavy load. Its feedback loop references a precise 0.600V ±9mV internal bandgap, enabling stable regulation across 0–3A load with ±3% output accuracy.

It integrates high-side and low-side synchronous MOSFETs with R_DS(ON) of 85mΩ and 60mΩ respectively, supports 100% duty-cycle operation for low-dropout applications, and features cycle-by-cycle current limiting (4A typ), UVLO (2.5V rising threshold), and thermal shutdown with 30°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	3A maximum continuous - supports DDR memory rails and video card core supplies without external current boosting.
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 direct 1.2V, 1.5V, 1.8V, 2.5V, or 3.3V generation via external resistor divider on FB pin.
Switching Frequency	1.5MHz (typ) - allows use of compact 2.2µH inductors and ceramic capacitors for minimal PCB footprint.
No-Load Quiescent Current	42µA (typ) - extends battery life in always-on subsystems such as network standby circuits.
Shutdown Current	<1µA - ensures near-zero power drain during system sleep modes.
Thermal Shutdown Threshold	150°C with 30°C hysteresis - provides robust overtemperature protection while allowing recovery at 120°C without manual reset.

Pinout & Package

PAM2303BECADJR is housed in an SOP-8EP (exposed pad) thermally enhanced plastic package measuring 4.9mm × 6.0mm × 1.75mm, with θ_JA = 90°C/W on standard 2-layer JEDEC board. The exposed pad must be soldered to PCB ground plane for optimal thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Bias supply input	Provides power to internal control circuitry; decoupled separately from PVIN to reduce noise coupling into error amplifier.
PVIN	Main power input	Connects directly to high-current input source and input capacitor; must be closely decoupled to PGND to minimize switching loop inductance.
SW	Power switch node	Drain connection of internal high-side and low-side MOSFETs; connects to inductor and forms critical high-di/dt switching node.
PGND	Main power ground	Low-impedance return path for power stage current; isolated from signal GND to prevent ground bounce in feedback path.
GND	Signal ground	Reference for FB, EN, and internal analog blocks; routed separately from PGND and tied at single point near IC.
FB	Feedback input	Senses output voltage via resistor divider; internal 0.600V reference enables accurate adjustable regulation with ±3% total error.
EN	Enable control	Logic-level input (1.5V high / 0.3V low threshold); supports sequencing and system-level power management.

Key Features

Feature	Design Value
Integrated Synchronous MOSFETs	85mΩ high-side + 60mΩ low-side R_DS(ON) - eliminates external rectifier losses and enables >95% peak efficiency at 3A.
Automatic PSM/PWM Mode Transition	Seamless shift at ~450mA load (VIN=3.3V, VO=1.2V) - maintains high light-load efficiency without audible switching noise.
Analog Soft-Start	0.5ms typical ramp time - prevents inrush current, avoids input rail collapse, and eliminates output overshoot during startup.
No External Compensation Required	Internally compensated type-II loop - reduces BOM count and layout sensitivity; eliminates stability tuning effort for standard 2.2µH/22µF designs.
100% Duty-Cycle Operation	Enables dropout operation down to V_OUT = V_IN − I_LOAD×(R_DS(ON)+R_L) - supports high-V_OUT/low-V_IN scenarios like 3.3V-out from 3.6V battery.

Applications

5V or 3.3V Point-of-Load Conversion

Telecom/Networking Equipment

Use Scenario: Local regulation of 3.3V or 5V rails from intermediate bus in access switches or edge routers.

IC Role / Device Role / Timing Role: Primary buck regulator delivering up to 3A to FPGA I/O banks or PHY transceivers.

Use Value: 95% efficiency and 42µA quiescent current reduce heat buildup and extend uptime in fanless enclosures.

Use Scenario: Powering line-card microcontrollers and interface logic in carrier-grade DSLAMs and OLTs.

IC Role / Device Role / Timing Role: Secondary DC-DC stage converting 5V backplane to 1.8V/2.5V for control-plane SoCs.

Use Value: SOP-8EP package enables dense placement near processors; 1.5MHz switching minimizes EMI filter size.

Set Top Boxes

DDR Memory Power Supply

Use Scenario: Generating 1.2V or 1.5V for ARM-based media processors in consumer STBs.

IC Role / Device Role / Timing Role: Core voltage regulator with dynamic voltage scaling support via FB divider.

Use Value: PSM mode maintains >85% efficiency at standby loads (<100mA), reducing no-signal power consumption.

Use Scenario: Providing tightly regulated 1.2V/1.35V to DDR3/DDR4 memory modules in NAS and DVR platforms.

IC Role / Device Role / Timing Role: High-current, low-noise buck converter with fast transient response for memory VDDQ rails.

Use Value: 3A capability and ±3% output accuracy meet JEDEC DDR voltage tolerance; 100% duty cycle supports low-V_IN brownout conditions.

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
MP2307DN-LF-Z (Monolithic Power)	3A, 2.5–24V input, 1.2MHz, requires external compensation, no PSM mode, higher IQ (260µA).	Wider input range suits industrial 12V/24V systems but lacks light-load efficiency optimization for battery-powered gear.	Select when input exceeds 5.5V or when external loop tuning is acceptable for custom transient response shaping.
TI TPS563201	3A, 4.5–17V input, 500kHz, integrated FETs, 110µA IQ, no 100% duty cycle, requires external soft-start cap.	Targeted at higher-input industrial and automotive applications; lower switching frequency increases inductor size.	Prefer for 12V intermediate bus conversion where thermal budget allows larger magnetics and higher quiescent draw is acceptable.

Compared with MP2307DN-LF-Z and TPS563201, the PAM2303BECADJR offers superior light-load efficiency via PSM, lower quiescent current, 100% duty-cycle capability for low-V_IN operation, and zero external compensation - making it optimal for compact, battery-sensitive 3.3V/5V point-of-load designs.

Availability

PAM2303BECADJR is available at Aetrix Electronics and suitable for telecom infrastructure, consumer set-top boxes, and DDR memory power delivery requiring stable component supply, consistent SOP-8EP packaging, and long-term production continuity.

Supply support for PAM2303BECADJR 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, Malaysia, and Taiwan.

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

FAQ

What is the recommended minimum output capacitance for stable operation?

The datasheet specifies 22µF ceramic output capacitance with low ESR for standard 1.8V/3A operation. Using X5R/X7R dielectric ceramics ensures stable regulation across temperature and bias; ESR below 10mΩ is required to limit output ripple to <15mV peak-to-peak under full load.

Can PAM2303BECADJR operate with input voltage equal to output voltage?

Yes - its 100% duty-cycle capability allows operation when V_IN ≈ V_OUT, delivering V_OUT = V_IN − I_LOAD × (R_DS(ON) + R_L). At 3A and 85mΩ R_DS(ON), dropout is ~255mV, enabling functional regulation down to V_IN = V_OUT + 0.26V.

How does the EN pin behave during power sequencing?

The EN pin has 1.5V turn-on and 0.3V turn-off thresholds with ±1.0µA leakage. When pulled high via resistor to VIN, it enables the device after UVLO release; when driven low by a processor GPIO or supervisor IC, it reduces supply current to <1µA, isolating input from output via internal switches.

Is thermal derating required for continuous 3A output in SOP-8EP package?

Yes - with θ_JA = 90°C/W, ambient temperature of 25°C, and max junction limit of 125°C, maximum allowable power dissipation is 1.11W. At 3A/1.2V output, conduction loss alone exceeds this; thus, full 3A load requires PCB copper pour, airflow, or reduced ambient to maintain safe junction temperature.

PAM2303BECADJR Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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:: 8-SO-EP

PAM2303BECADJR FAQ

1.How can I place an order for PAM2303BECADJR through Aetrix?

Please submit a Request for Quotation (RFQ) for PAM2303BECADJR 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 PAM2303BECADJR reliable?

The price and inventory of PAM2303BECADJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2303BECADJR is usually 5 days.

3.What payment methods are accepted for PAM2303BECADJR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2303BECADJR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PAM2303BECADJR?

PAM2303BECADJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PAM2303BECADJR 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 PAM2303BECADJR?

For technical support, including PAM2303BECADJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2303BECADJR requirements.

6.How does Aetrix verify that PAM2303BECADJR is sourced from the original manufacturer or authorized distributors?

All PAM2303BECADJR 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 PAM2303BECADJR meets industry standards.

7.What is the process for return or replacement of PAM2303BECADJR?

All PAM2303BECADJR units undergo pre-shipment inspection (PSI). If there is an issue with PAM2303BECADJR, 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 PAM2303BECADJR part is unused and in its original packaging.

Return procedure for PAM2303BECADJR:

1.Submit a request within 90 days.

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

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