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

Diodes Incorporated PAM2327AGPADJ

Name: PAM2327AGPADJ
Brand: Diodes Incorporated
SKU: PAM2327AGPADJ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PAM2327AGPADJ

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 12-PowerWFQFN

Datasheet:: PAM2327AGPADJ.pdf

Description:: IC REG BUCK ADJ 3.5A 12QFN

Quantity:: RFQ Add To RFQ list

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Inventory:1,036

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Product details

Overview

PAM2327AGPADJ from Diodes Incorporated is a 3.5A synchronous step-down DC-DC converter with 1.2MHz switching frequency, adjustable output (1.0V–4.0V), 55µA no-load quiescent current, and QFN2x2-12 package - designed for high-efficiency power delivery in space-constrained portable electronics such as USB devices and handheld computers.

For engineers reviewing the PAM2327AGPADJ datasheet, PAM2327AGPADJ pinout, PAM2327AGPADJ application, or PAM2327AGPADJ equivalent, key selection criteria include input voltage range (2.5V–5.5V), 100% duty cycle low-dropout operation, thermal shutdown at 150°C, hiccup-mode short-circuit protection, and PG open-drain power-good indicator functionality.

Technical Context

The PAM2327AGPADJ integrates high- and low-side MOSFETs with R_DS(ON) of 40mΩ (P-MOSFET) and 30mΩ (N-MOSFET), enabling efficient 3.5A continuous output. Its adaptive pulse-skipping mode (PSM) optimizes light-load efficiency while maintaining PWM mode under heavy load for low output ripple.

Internal soft-start limits inrush current; UVLO threshold is 2.5V (±150mV hysteresis); feedback reference is 0.60V (±1.5%); and power-good detection triggers within ±10% of regulated V_OUT, with 90µs delay and internal pull-up to V_IN.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	3.5A max continuous - supports high-current SoC cores and PMIC rails in portable systems
Input Voltage Range	2.5V to 5.5V - compatible with single-cell Li-ion, USB 5V, and wide-input battery-powered designs
Adjustable Output	1.0V to 4.0V via external resistor divider - enables flexible rail generation for processors, memory, and peripherals
Switching Frequency	1.2MHz (typ.) - allows use of compact 1.0µH inductors and reduces EMI filtering burden
Quiescent Current	55µA at no load - extends battery life in always-on or standby modes
Thermal Protection	OTP at 150°C with 30°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design
Efficiency	Up to 90% at 1.5A–2A load - minimizes heat rise in ultra-small 2mm × 2mm footprint

Pinout & Package

The PAM2327AGPADJ is housed in an ultra-compact, thermally enhanced QFN2x2-12 package with exposed thermal pad (pin 13 not electrically connected). Package dimensions: 2.0mm × 2.0mm × 0.75mm, 0.4mm pitch, RoHS/REACH compliant.

Pin/Terminal	Circuit Role	Design Meaning
1, 10 PVIN / VIN	Power input for FETs and control circuitry	Internally connected - supplies both power stage and bias; requires local 20µF ceramic decoupling
2, 11 SW	Switch node	Drives external inductor; must be routed with minimal loop area to reduce EMI and switching loss
3, 12 PGND	Power ground return	Low-impedance path for high di/dt currents; tied directly to thermal pad and input/output capacitor grounds
4 AGND	Analog ground reference	Separate quiet ground for FB, EN, PG - must be star-connected to PGND near IC to avoid noise coupling
5 NC	No connect	Must remain floating - no connection to GND or any other net
6 OUT	Output voltage sense	Direct connection to regulated output rail - improves load regulation accuracy vs. remote sensing
7 FB	Feedback input	Monitors divided output voltage; sets regulation point via 0.6V internal reference and external resistor divider
8 EN	Enable control	Active-high logic input (V_EH = 1.2V, V_EL = 0.4V); 1.2–4µA input current enables precise sequencing
9 PG	Power-good indicator	Open-drain output pulled up to V_IN; asserts HIGH when V_FB is within ±10% of target - used for system power sequencing and fault monitoring

Key Features

Feature	Design Value
100% Duty Cycle Operation	Enables dropout operation down to V_IN – V_OUT ≈ I_LOAD × R_DS(ON), critical for battery-powered systems nearing end-of-discharge
Hiccup-Mode Short-Circuit Protection	Automatically cycles on/off during sustained overload - limits average power dissipation and prevents thermal runaway without latch-off
Internal Soft-Start	Controls output ramp rate to prevent input voltage sag and overshoot, eliminating need for external timing components
PSM/PWM Dual-Mode Control	Seamlessly transitions between high-efficiency pulse-skipping (light load) and fixed-frequency PWM (heavy load) - maintains <±2% output ripple across full load range
Thermal Shutdown with Hysteresis	Shuts down at 150°C junction temperature and resumes at 120°C - provides robust protection while avoiding oscillatory cycling near thermal limit

Applications

USB-Powered Peripherals

Digital Cameras

Use Scenario: Powering image sensor, ISP, and SD card interface from 5V USB supply in compact camera modules.

IC Role / Device Role / Timing Role: Primary buck regulator delivering 1.8V/3.3V rails with fast transient response to handle burst-mode sensor readout.

Use Value: 1.2MHz switching enables tiny 1.0µH inductor and ceramic caps, reducing board area by >40% vs. lower-frequency alternatives.

Use Scenario: Supplying processor core, memory, and display backlight from single-cell Li-ion (2.8V–4.2V).

IC Role / Device Role / Timing Role: Adjustable-output buck converter supporting dynamic voltage scaling for CPU performance states.

Use Value: 100% duty cycle operation sustains 3.3V output even at battery voltages below 3.5V, extending usable runtime.

Wireless Network Cards

Portable Media Players

Use Scenario: Generating stable 1.2V core and 3.3V I/O rails for Wi-Fi/BT SoCs in M.2 or mini-PCIe form factors.

IC Role / Device Role / Timing Role: High-efficiency DC-DC converter with PG signal for host processor power sequencing and fault reporting.

Use Value: 55µA quiescent current minimizes standby drain, enabling multi-week shelf life without battery recharge.

Use Scenario: Powering audio DAC, flash memory, and touchscreen controller in battery-operated media players.

IC Role / Device Role / Timing Role: Synchronous buck regulator with excellent line/load regulation (<2% load regulation) ensuring clean analog audio supply.

Use Value: Low 12mV_PK-PK transient ripple at 2A step load preserves SNR in sensitive audio paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2143GQ-Z	2.5A max output, 2.2MHz f_SW, 30µA IQ, QFN2x2-10	Limited peak current headroom for 3.5A loads; higher f_SW increases switching loss at high VIN	Preferred where size is paramount and load rarely exceeds 2.5A
TI TPS62231DRYR	3A max output, 3.6MHz f_SW, 17µA IQ, WSON-6	Lower current rating and no PG pin; smaller package lacks thermal pad for >2A continuous operation	Suitable for cost-sensitive, lower-power applications without power-good monitoring

Compared with MP2143GQ-Z and TPS62231DRYR, the PAM2327AGPADJ delivers higher output current (3.5A), integrated PG signaling, and superior thermal performance in its QFN2x2-12 package - making it optimal for compact, high-reliability portable systems requiring robust overcurrent and thermal protection.

Availability

PAM2327AGPADJ is available at Aetrix Electronics and suitable for USB-powered peripherals, digital cameras, wireless network cards, and portable media players requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for PAM2327AGPADJ 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 analog ICs, specializing in high-performance power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.

The PAM2327 belongs to Diodes' high-density DC-DC converter product line, engineered specifically for ultra-compact, battery-powered portable electronics demanding high efficiency, low quiescent current, and robust protection features in sub-2mm² footprints.

FAQ

What is the minimum recommended output capacitance for stable operation?

The PAM2327AGPADJ requires ≥20µF total output capacitance with low ESR (≤10mΩ) for stable regulation and ≤2% output ripple at full load. Ceramic X5R/X7R capacitors are strongly recommended; parallel combinations (e.g., 10µF + 10µF) improve high-frequency decoupling and thermal derating margin.

How does the hiccup-mode short-circuit protection behave under sustained overload?

Under sustained overload, the PAM2327AGPADJ enters hiccup mode after three (if V_FB ≤ 0.2V) or 64 (if V_FB > 0.2V) consecutive current-limit events. It then disables both MOSFETs for ~59ms (1.7% duty cycle), re-attempts soft-start, and repeats - limiting average power dissipation to <150mW and preventing thermal damage.

Can the PAM2327AGPADJ operate with input voltage equal to the output voltage?

Yes - the PAM2327AGPADJ supports 100% duty cycle operation, allowing V_OUT to track V_IN minus I_LOAD × R_DS(ON). At 3.5A and R_DS(ON) = 40mΩ, dropout is ~140mV, enabling regulation down to V_IN = V_OUT + 0.14V - ideal for Li-ion battery discharge tail-end operation.

Is the AGND pin required to be isolated from PGND on the PCB?

Yes - AGND must be a separate quiet ground plane, connected to PGND at a single point near the IC's thermal pad. This prevents switching noise from PGND from modulating the FB reference and causing output voltage inaccuracy or instability, especially critical for <±1% regulation accuracy.

PAM2327AGPADJ Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 12-PowerWFQFN

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):: 2.5V

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 1V

Voltage - Output (Max):: 4V

Current - Output:: 3.5A

Frequency - Switching:: 1.2MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 12-QFN (2x2)

PAM2327AGPADJ FAQ

1.How can I place an order for PAM2327AGPADJ through Aetrix?

Please submit a Request for Quotation (RFQ) for PAM2327AGPADJ 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 PAM2327AGPADJ reliable?

The price and inventory of PAM2327AGPADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2327AGPADJ is usually 5 days.

3.What payment methods are accepted for PAM2327AGPADJ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2327AGPADJ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PAM2327AGPADJ?

PAM2327AGPADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PAM2327AGPADJ 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 PAM2327AGPADJ?

For technical support, including PAM2327AGPADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2327AGPADJ requirements.

6.How does Aetrix verify that PAM2327AGPADJ is sourced from the original manufacturer or authorized distributors?

All PAM2327AGPADJ 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 PAM2327AGPADJ meets industry standards.

7.What is the process for return or replacement of PAM2327AGPADJ?

All PAM2327AGPADJ units undergo pre-shipment inspection (PSI). If there is an issue with PAM2327AGPADJ, 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 PAM2327AGPADJ part is unused and in its original packaging.

Return procedure for PAM2327AGPADJ:

1.Submit a request within 90 days.

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

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