PAM2319AYAA

The PAM2319 is a dual step-down current-mode, DC-DC converter. At heavy load, the constant frequency PWM control performs excellent stability and transient response. To ensure the longest battery life in portable applications, the PAM2319 provides a power-saving Pulse-Skipping Modulation (PSM) mode to reduce quiescent current under light load operation. The PAM2319 supports a range of input voltages from 2.7V to 5.5V, allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH cell, USB, and other standard power sources. The dual output voltages are adjustable from 1.0V to 3.3V. Both channels employ internal power switch and synchronous rectifier to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 0.1μA. Other key features include under-voltage lockout, soft-start, short circuit protection and thermal shutdown.

Applications

• Portable Electronics
• Personal Information Appliances
• Wireless and DSL Modems

Key features

• Supply Voltage: 2.7V to 5.5V Output Voltage: Vo1 ADJ/1000mA; Vo2 ADJ/2000mA
• Low Quiescent Current: Channel 1: 40μA; Channel 2: 55μA
• High Efficiency
• Switching Frequency: 3MHz(Channel 1) 2.5MHz(Channel 2)
• Internal Synchronous Rectifier
• Soft Start
• Under-Voltage Lockout
• Short Circuit Protection Thermal Shutdown
• Small W-DFN3X3-12L Pb-Free/Halogen Free Package
• RoHS/REACH Compliant