AS1335 DC-DC Step-down Converter IC

Description

The AS1335 is a high-current, constant-frequency synchronous buck converter available in adjustable and fixed voltage versions. The wide input voltage range (2.6V to 5.25V), the output current of (1.5A) and minimal external component requirements make the AS1335 perfect for any single Li-Ion battery-powered application.

An internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The internally fixed switching frequency (1.5MHz) allows for the use of small surface mount external inductors.

The output voltage can be adjusted via external resistor divider between 0.6V and 5.25V

The AS1335 is available in a 10-pin TDFN 3x3mm package.

Key Features

• Input Voltage Range: 2.6V to 5.25V
• Output Voltage Range: 0.6V to VIN
• Output Current: 1.5A
• Constant Frequency Operation: 1.5MHz
• High Efficiency: Up to 96%
• No Schottky Diode Required
• Power OK with 215ms delay
• Low Dropout Operation: 100% Duty Cycle
• Low Quiescent Supply Current: 400μA
• Shutdown Mode Supply Current: ≤1μA
• Current Mode Operation for Excellent Line/Load
• Thermal Protection
• 10-pin TDFN 3x3mm Package

Applications

The device is ideal for supplying system with a need for higher currents as power line modems, netbooks, laptops, mobile communication devices, application processors, medical instruments or any other space-limited application with low power-consumption requirements.

Block diagram for AS1335 DC-DC Step-down Converter IC