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

Diodes Incorporated PAM2401YPADJ

Name: PAM2401YPADJ
Brand: Diodes Incorporated
SKU: PAM2401YPADJ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PAM2401YPADJ

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 12-UFDFN Exposed Pad

Datasheet:: PAM2401YPADJ.pdf

Description:: IC REG BOOST ADJ 1A UDFN303012

Quantity:: RFQ Add To RFQ list

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Inventory:26,591

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Product details

Overview

PAM2401YPADJ from Diodes Incorporated is a high-efficiency, current-mode, 1.0MHz step-up DC-DC converter with true output disconnect, programmable current limit (1.0A–3.0A), adjustable output voltage (2.5V–5.0V), and Pulse Skip Mode for light-load efficiency. It integrates an N-channel MOSFET (R_DS(ON) = 100–170 mΩ) and P-channel synchronous rectifier (R_DS(ON) = 150–250 mΩ), targeting portable power rails in battery-powered GPS receivers and handheld computers.

For engineers reviewing the PAM2401YPADJ datasheet, PAM2401YPADJ pinout, PAM2401YPADJ application, or PAM2401YPADJ equivalent, key selection criteria include its 0.9V startup capability, 150µA quiescent current in PSM, 95% peak efficiency at 1A/5V, and U-DFN3030-12 thermal performance (Θ_JA = 60°C/W).

Technical Context

The PAM2401YPADJ employs fixed-frequency current-mode control with internal compensation and soft-start, enabling stable regulation across 0.9V–4.75V input and 2.5V–5.0V output. Its feedback reference is precisely trimmed to 0.6V (±2%), and output voltage is set via external resistor divider per V_OUT = 0.6 × (1 + R1/R2).

It features automatic transition to Pulse Skip Mode below ~100mA load, reducing quiescent current to 150µA, and includes hiccup-mode short-circuit protection, overvoltage lockout (92% V_OUT threshold), and thermal shutdown at 160°C with 50°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	1.0 MHz ±20% - enables compact 1.5–2.2 µH inductor and low-profile ceramic capacitors.
Input Voltage Range	0.9 V to 4.75 V - supports single-cell Li-ion (2.7–4.2V), NiMH, or alkaline battery inputs.
Output Voltage Range	2.5 V to 5.0 V - adjustable via FB pin; 0.6 V reference allows precise 3.3V/5.0V rail generation.
Current Limit Range	1.0 A to 3.0 A - set by external R_SET; ensures safe inductor peak current under varying loads.
Quiescent Current	150 µA in PSM - extends runtime in standby mode for portable devices with intermittent load profiles.
Efficiency Peak	95% at I_OUT = 1A, V_IN = 3.3V, V_OUT = 5.0V - minimizes thermal rise in space-constrained U-DFN3030-12 package.
Startup Voltage	1.0 V @ 100 mA - enables reliable boot from deeply discharged batteries without external bias.

Pinout & Package

Package: U-DFN3030-12 (3.0 mm × 3.0 mm × 0.6 mm, 12-pin, exposed thermal pad). Optimized for high-power density and thermal dissipation (Θ_JA = 60°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1,2 LX	Switch Node	Connects to inductor and internal N-MOSFET drain; carries high di/dt switching current.
3 EN	Enable Input	Active-high logic control; <0.2V disables device, <1µA shutdown current.
4 VIN	Input Supply	Primary DC input (0.9–4.75V); requires ≥10 µF low-ESR ceramic capacitor nearby.
5,6 PG	Power Good Indicator	Open-drain output asserting when V_OUT is within ±8% of target; pulls low if OVP or UVLO occurs.
7 AGND	Analog Ground	Reference for FB, R_SET, and internal error amplifier; must be star-connected to PGND at single point.
8 FB	Feedback Input	Senses output via resistor divider; internal 0.6V reference sets regulation accuracy (±2%).
9,10 OUT	Regulated Output	Delivers up to 1A at 2.5–5.0V; requires ≥22 µF low-ESR ceramic capacitor for ripple suppression.
11,12 PGND	Power Ground	High-current return path for MOSFETs and inductor; connects to exposed thermal pad for heat sinking.

Key Features

Feature	Design Value
True Output Disconnect	Internal MOSFETs fully isolate V_OUT from VIN during shutdown - prevents battery drain in off-state.
Inrush Current Limiting	Pre-charges output capacitor at 500 mA for 400 µs at power-on - avoids input voltage sag and system reset.
Programmable Current Limit	R_SET pin accepts 66 kΩ–200 kΩ to set 1.0–3.0 A limit - matches inductor saturation rating and PCB trace capacity.
Internal Soft-Start	Gradually ramps output voltage over ~1 ms - eliminates overshoot and reduces stress on output capacitors.
Hiccup-Mode Short Protection	Disables switching for 10 ms after fault detection, then retries - prevents thermal runaway during sustained shorts.

Applications

Handheld Computers

Cordless Phones

Use Scenario: Powering 3.3V I/O and 5V USB peripherals from a single 3.6V Li-ion cell.

IC Role / Device Role / Timing Role: Step-up regulator providing regulated 5.0V rail with true disconnect to preserve battery charge during sleep.

Use Value: 95% efficiency at 1A and 150µA PSM current extend usable runtime by >30% versus legacy PWM-only boost converters.

Use Scenario: Generating stable 5.0V supply for RF power amplifier and baseband ICs in DECT handsets.

IC Role / Device Role / Timing Role: Primary DC-DC converter delivering low-noise 5V output with hiccup-mode protection against antenna mismatch faults.

Use Value: 1.0MHz switching frequency enables use of 2.2µH inductors <2mm height, meeting slim handset mechanical constraints.

GPS Receivers

Battery Backup Supplies

Use Scenario: Boosting voltage from aging 2.4V backup coin cell to 3.3V for real-time clock and SRAM retention.

IC Role / Device Role / Timing Role: Ultra-low-input boost converter with guaranteed 1.0V startup and 150µA quiescent current.

Use Value: 0.9V minimum input and 1.0V startup enable operation down to end-of-life battery voltage, extending backup duration.

Use Scenario: Providing isolated 5.0V auxiliary rail during main supply failure in industrial controllers.

IC Role / Device Role / Timing Role: Standby power manager with true output disconnect and <1µA shutdown current.

Use Value: <1µA shutdown current ensures multi-year backup life from small Li-SOCl₂ cells without self-discharge penalty.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS61099YFFR	Lower IQ (300nA shutdown, 400nA PSM), but fixed 3.3V/5.0V outputs; no adjustable V_OUT or R_SET-based current limit.	Best for ultra-low-power always-on sensors where output voltage is fixed and current limit is not safety-critical.	Select if lowest possible shutdown current is mandatory and output adjustability is unnecessary.
RT9013-33GJ6	Fixed 3.3V output only; 1.5MHz switching; no true output disconnect or hiccup-mode protection.	Suitable for cost-sensitive consumer audio accessories with non-critical fault tolerance.	Select only when 3.3V is sufficient and thermal robustness is secondary to BOM cost.

Compared with TPS61099YFFR and RT9013-33GJ6, the PAM2401YPADJ uniquely combines adjustable output voltage, programmable current limiting, true output disconnect, and hiccup-mode protection in a thermally enhanced U-DFN3030-12 package-making it optimal for battery-powered systems requiring design flexibility and field reliability.

Availability

PAM2401YPADJ is available at Aetrix Electronics and suitable for handheld computers, GPS receivers, cordless phones, and battery backup supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PAM2401YPADJ 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-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The PAM2401 belongs to Diodes' Power Management product line, engineered specifically for compact, high-efficiency boost conversion in portable and battery-critical applications where thermal performance and low-quiescent operation are essential.

FAQ

What is the minimum input voltage required to start up the PAM2401YPADJ?

The PAM2401YPADJ guarantees startup at 1.0V with 100mA load and 3.3V output, and operates down to 0.9V input under no-load conditions. This enables reliable operation from partially discharged single-cell batteries, including Li-ion cells below 3.0V and NiMH packs at end-of-discharge.

How does the RSET pin configure current limiting?

The RSET pin sets the N-channel MOSFET current limit between 1.0A and 3.0A using an external resistor: 66kΩ yields 1.0A, 100kΩ yields 1.5A, and floating or >200kΩ yields 3.0A. The relationship is monotonic and verified across temperature, allowing precise matching to inductor saturation current and PCB trace limits.

Does the PAM2401YPADJ provide reverse current blocking during shutdown?

Yes-the PAM2401YPADJ implements true output disconnect via integrated back-to-back MOSFETs. When disabled, both the N-channel switch and P-channel synchronous rectifier turn off, isolating VOUT from VIN and preventing reverse current flow or battery drain, critical for backup and low-power hold-up applications.

What thermal considerations apply to the U-DFN3030-12 package?

The U-DFN3030-12 package has Θ_JA = 60°C/W with standard 2-layer PCB layout (1-in² 2-oz copper pour under exposed pad). To maintain junction temperature <125°C at 1A/5V, ensure the thermal pad is soldered to solid PGND plane and avoid enclosing the device in sealed enclosures without airflow.

PAM2401YPADJ Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 12-UFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Up

Output Configuration:: Positive

Topology:: Boost

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 0.9V

Voltage - Input (Max):: 4.75V

Voltage - Output (Min/Fixed):: 2.5V

Voltage - Output (Max):: 5V

Current - Output:: 1A

Frequency - Switching:: 1MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: U-DFN3030-12

PAM2401YPADJ FAQ

1.How can I place an order for PAM2401YPADJ through Aetrix?

Please submit a Request for Quotation (RFQ) for PAM2401YPADJ 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 PAM2401YPADJ reliable?

The price and inventory of PAM2401YPADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2401YPADJ is usually 5 days.

3.What payment methods are accepted for PAM2401YPADJ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2401YPADJ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PAM2401YPADJ?

PAM2401YPADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PAM2401YPADJ 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 PAM2401YPADJ?

For technical support, including PAM2401YPADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2401YPADJ requirements.

6.How does Aetrix verify that PAM2401YPADJ is sourced from the original manufacturer or authorized distributors?

All PAM2401YPADJ 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 PAM2401YPADJ meets industry standards.

7.What is the process for return or replacement of PAM2401YPADJ?

All PAM2401YPADJ units undergo pre-shipment inspection (PSI). If there is an issue with PAM2401YPADJ, 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 PAM2401YPADJ part is unused and in its original packaging.

Return procedure for PAM2401YPADJ:

1.Submit a request within 90 days.

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

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