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PAM2401SCADJ

DIOPAM2401SCADJ

Diodes Incorporated
Boost Switching Regulator IC Positive Adjustable 2.5V 1 Output 1A 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Active23,756 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The PAM2401SCADJ is a high-efficiency boost switching regulator designed for single-cell or dual-cell battery applications. It features a low 1.0V guaranteed start-up voltage and can provide up to 1A of output current when stepping up from 3V to 5V. The device includes a true output disconnect function that eliminates leakage current from the input to the output when in shutdown mode.

Why Choose This Part

The 1MHz switching frequency allows for the use of small surface-mount inductors and capacitors, reducing the overall PCB footprint. Its true output disconnect feature is a critical advantage over standard boost converters as it prevents the load from draining the battery while the regulator is disabled.

Applications

Single-Cell Li-ion to 5V Rail
Boosting a 3.7V nominal lithium battery to a stable 5V supply for USB peripherals or logic rails.
AA/AAA Battery Powered Devices
Utilizing the 1.0V start-up capability to run electronics from one or two alkaline or NiMH cells.
Handheld Medical Instruments
Providing a compact power solution with low shutdown current to extend shelf life in portable diagnostic tools.
Wireless Sensor Nodes
Using the Power Good indicator and true disconnect to manage power sequencing in IoT hardware.

Key Specifications

Function Step-Up
Topology Boost
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Current - Output 1A
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 1MHz
Operating Temperature -40degC ~ 85degC (TA)
Synchronous Rectifier Yes
Voltage - Input (Max) 4.75V
Voltage - Input (Min) 0.9V
Voltage - Output (Max) 5V
Supplier Device Package 8-MSOP
Voltage - Output (Min/Fixed) 2.5V

Getting Started

To implement the PAM2401SCADJ, select an inductor with a saturation current exceeding the programmed peak current limit and low DCR for maximum efficiency. Set the output voltage between 2.5V and 5V using a resistor divider at the FB pin, and ensure the input and output capacitors are placed as close to the IC pins as possible to minimize noise.

PAM2401 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
PAM2401SCADJ (this part) TSSOP-8 23,756
PAM2401YPADJ UFDFN-12 25,547

Also Consider

MCP1640 MCHPMicrochip Technology - Offers a lower 0.65V start-up voltage and similar true disconnect features for very low voltage battery applications.
TPS61021A TITexas Instruments - Provides a higher 3A switch current limit in a smaller VQFN package for space-constrained designs.