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

Diodes Incorporated PAM2325AGPADJ_A01

Name: PAM2325AGPADJ_A01
Brand: Diodes Incorporated
SKU: PAM2325AGPADJ_A01
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PAM2325AGPADJ_A01

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: -

Datasheet:: PAM2325AGPADJ_A01.pdf

Description:: IC REG

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Product details

Overview

PAM2325AGPADJ_A01 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 space-constrained portable power rails in USB devices and handheld computers.

For engineers reviewing the PAM2325AGPADJ_A01 datasheet, PAM2325AGPADJ_A01 pinout, PAM2325AGPADJ_A01 application, or PAM2325AGPADJ_A01 equivalent, key selection criteria include input voltage range (2.5V–5.5V), 100% duty-cycle low-dropout operation, thermal shutdown at 150°C, and PG open-drain power-good signaling with ±10% output accuracy.

Technical Context

The PAM2325AGPADJ_A01 integrates high- and low-side MOSFETs with R_DS(ON) of 40mΩ (P-MOS) and 30mΩ (N-MOS), enabling high-efficiency regulation across 2.5V–5.5V input and 1.0V–4.0V output. Its adaptive pulse-skipping mode (PSM) and fixed-frequency PWM mode dynamically optimize light-load efficiency and output ripple.

Control architecture includes internal 0.6V reference, soft-start circuitry limiting in-rush current, hiccup-mode short-circuit protection with configurable counter depth (3-bit or 6-bit based on FB voltage), and UVLO with 2.5V threshold and 550mV hysteresis - all operating over –40°C to +85°C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	3.5A max - supports high-current SoC core rails without external current boosting
Switching Frequency	1.2MHz typical - enables use of 1.0µH inductor and compact ceramic capacitors
Input Voltage Range	2.5V to 5.5V - compatible with single-cell Li-ion, USB 5V, and regulated 3.3V supplies
Quiescent Current	55µA at no load - extends battery life in always-on portable subsystems
Feedback Reference	0.60V ±1.5% - sets output via external resistor divider with ±4% total V_OUT accuracy
Thermal Shutdown	150°C trip, 120°C hysteresis - protects IC and PCB during sustained overload or poor heatsinking
Power Good Threshold	±10% of regulated V_OUT - provides reliable rail monitoring for processor reset sequencing

Pinout & Package

Package: QFN2x2-12, 0.4mm pitch, exposed thermal pad (PGND-connected), RoHS/REACH compliant.

Pin/Terminal	Circuit Role	Design Meaning
1, 10 PVIN/VIN	Power input for FETs and control logic	Internally connected - accepts 2.5V–5.5V; must be decoupled near pin with low-ESR ceramic cap
2, 11 SW	Switch node	Drives external inductor; requires tight layout to minimize EMI and switching losses
3, 12 PGND	Power ground return	Low-impedance path for high di/dt switch currents; tied to thermal pad for thermal conduction
4 AGND	Analog ground reference	Separate quiet ground for feedback and error amplifier - must not share traces with PGND
5 NC	No connect	Must remain unconnected; floating - not tied to GND or any other net
6 OUT	Output voltage sense	Direct connection to regulated output rail - improves load regulation by compensating trace IR drop
7 FB	Feedback input	Sets output voltage via resistor divider to 0.60V reference; sensitive to noise - requires local filtering
8 EN	Enable control	Active-high logic input (1.2V threshold); 1µA shutdown current enables system-level power gating
9 PG	Power good indicator	Open-drain output pulled up to VIN - signals valid regulation; used for sequenced power-up

Key Features

Feature	Design Value
100% duty-cycle operation	Enables dropout <100mV at 3.5A - critical for battery-powered systems nearing end-of-discharge
Internal soft-start	250–1000µs ramp time - prevents input voltage sag and output overshoot during startup
Hiccup-mode short protection	1.7% typical duty cycle during fault - limits average power dissipation and enables self-recovery
PSM/PWM dual-mode control	Automatically transitions between high-efficiency light-load PSM and low-ripple PWM - no external mode pin required
Thermal resistance θ_JA	80°C/W on JEDEC 2-layer board - defines maximum continuous power (1.25W at 25°C ambient)

Applications

Cellular Phone Power Rail

Digital Camera Core Supply

Use Scenario: Regulating 1.2V/1.8V core voltage for application processors and image signal processors in slim smartphones.

IC Role / Device Role / Timing Role: Primary buck converter delivering 3.5A peak current with fast transient response to handle burst-mode CPU loads.

Use Value: 55µA quiescent current extends standby time; 1.2MHz switching allows ultra-compact 1µH inductor and 0402-size ceramics.

Use Scenario: Providing stable 3.3V supply to CMOS image sensors and flash memory controllers during high-speed capture sequences.

IC Role / Device Role / Timing Role: High-accuracy adjustable buck regulator with ±4% output tolerance and PG signal for sensor initialization handshake.

Use Value: 100% duty-cycle operation maintains regulation down to 3.4V input - essential for single-cell Li-ion operation under load.

USB Peripheral Power Management

Handheld Computer System Rail

Use Scenario: Generating 1.0V–1.2V I/O or DDR termination voltage from 5V USB bus power in portable hubs or dongles.

IC Role / Device Role / Timing Role: Compact, thermally efficient step-down converter with integrated MOSFETs and thermal shutdown.

Use Value: QFN2x2-12 footprint fits within tight USB-C connector spacing; hiccup-mode prevents thermal runaway during cable fault conditions.

Use Scenario: Delivering 1.5V/2.5V logic rails to ARM-based PDAs with dynamic load steps from display backlight and wireless radios.

IC Role / Device Role / Timing Role: Synchronous buck controller with PG output synchronized to system reset generator for deterministic boot timing.

Use Value: Excellent transient response (<±12% pk-pk ripple under 20mA→2A step) ensures stable operation during radio transmit bursts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2158GQZ-P	2.5A max output, 2MHz switching, 25µA IQ, QFN2x2-10 package	Limited peak current headroom for >3A loads; higher f_SW demands tighter layout control	Select when lower quiescent current and smaller solution size outweigh current capability needs
TI TPS6286518RQYR	4A max output, 2.5MHz f_SW, 15µA IQ, 0.6V ref, WSON10 package	Higher cost, requires external compensation; superior light-load efficiency but less robust hiccup protection	Select for ultra-low IQ and higher precision (±1% V_FB) in premium portable designs

Compared with MP2158GQZ-P and TPS6286518RQYR, the PAM2325AGPADJ_A01 delivers higher peak current (3.5A vs. 2.5A/4A), proven hiccup-mode reliability under sustained short, and simpler external component count - making it optimal for cost-sensitive, thermally constrained portable systems requiring robust 3A+ regulation.

Availability

PAM2325AGPADJ_A01 is available at Aetrix Electronics and suitable for cellular phone power rails, digital camera core supplies, and USB peripheral power management requiring stable component supply, full production traceability, and long-term lifecycle support.

Supply support for PAM2325AGPADJ_A01 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-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.

The PAM2325 belongs to Diodes' high-density DC-DC converter product line, engineered specifically for portable electronics where ultra-small footprint, low quiescent current, and robust thermal behavior are mandatory design constraints.

FAQ

What is the minimum recommended inductor value for PAM2325AGPADJ_A01?

The datasheet specifies a typical starting point of 1.0µH for most applications, selected to achieve ~40% ripple current (ΔI_L ≈ 1.4A at 3.5A max). Inductor DC resistance must be minimized to maintain efficiency, and saturation current rating should exceed 4.2A (3.5A + 0.7A ripple margin). X5R/X7R ceramic capacitors are strongly recommended for both input and output stages.

How does the PAM2325AGPADJ_A01 handle output short-circuit conditions?

It employs hiccup-mode protection: repeated current-limit events trigger a shutdown interval (~1.7% duty cycle), after which a full soft-start sequence resumes. Counter depth (3-bit or 6-bit) depends on FB voltage level. During soft-start, hiccup mode is disabled to prevent false triggering. Thermal shutdown at 150°C provides secondary protection if hiccup fails to clear the fault.

Can the PAM2325AGPADJ_A01 operate with input voltage equal to output voltage?

Yes - its 100% duty-cycle capability allows regulation down to V_IN – V_OUT = I_LOAD × R_DS(ON) (P-MOS), typically <100mV at 3.5A. This enables stable operation as battery voltage drops near the regulated output, eliminating need for LDO post-regulation in many portable designs.

What is the role of the separate AGND and PGND pins?

AGND provides a clean reference for the feedback amplifier and internal reference, isolating sensitive analog circuitry from high di/dt power ground noise. PGND carries high-frequency switch currents and connects directly to the thermal pad. Separating these grounds minimizes offset errors in the feedback loop and improves output voltage accuracy and transient stability.

PAM2325AGPADJ_A01 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: *

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Packaging:: Bulk

Product Status:: Obsolete

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Synchronous Rectifier:: -

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PAM2325AGPADJ_A01 FAQ

1.How can I place an order for PAM2325AGPADJ_A01 through Aetrix?

Please submit a Request for Quotation (RFQ) for PAM2325AGPADJ_A01 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 PAM2325AGPADJ_A01 reliable?

The price and inventory of PAM2325AGPADJ_A01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2325AGPADJ_A01 is usually 5 days.

3.What payment methods are accepted for PAM2325AGPADJ_A01?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2325AGPADJ_A01 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PAM2325AGPADJ_A01?

PAM2325AGPADJ_A01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PAM2325AGPADJ_A01 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 PAM2325AGPADJ_A01?

For technical support, including PAM2325AGPADJ_A01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2325AGPADJ_A01 requirements.

6.How does Aetrix verify that PAM2325AGPADJ_A01 is sourced from the original manufacturer or authorized distributors?

All PAM2325AGPADJ_A01 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 PAM2325AGPADJ_A01 meets industry standards.

7.What is the process for return or replacement of PAM2325AGPADJ_A01?

All PAM2325AGPADJ_A01 units undergo pre-shipment inspection (PSI). If there is an issue with PAM2325AGPADJ_A01, 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 PAM2325AGPADJ_A01 part is unused and in its original packaging.

Return procedure for PAM2325AGPADJ_A01:

1.Submit a request within 90 days.

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

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