DESCRIPTION:

The TPS62420 device is a synchronous dual step-down dc-dc converter optimized for battery-powered portable applications. It provides two independent output voltage rails powered by 1-cell Li-Ion or 3-cell NiMH/NiCD batteries. The device is also suitable to operate from a standard 3.3-V or 5-V voltage rail. With the EasyScale™ serial interface the output voltages can be modified during operation. It therefore supports Dynamic Voltage Scaling for low power DSP and processors. The TPS62420 operates at 2.25-MHz fixed switching frequency and enters Power Save Mode operation at light load currents to maintain high efficiency over the entire load current range. For low-noise applications, the devices can be forced into fixed-frequency PWM mode by pulling the MODE/DATA pin high. In the shutdown mode, the current consumption is reduced to 1.2 μA. The device allows the use of small inductors and capacitors to achieve a small solution size.

The TPS62420 is available in a 10-pin leadless package (3mm×3mm QFN).

FEATURES:

• Qualified for Automotive Applications 

• Power Save Mode at Light Load Currents

• High Efficiency: Up to 95%

 • 180° Out of Phase Operation

• VIN Range From 2.5 V to 6 V 

• Output Voltage Accuracy in PWM Mode: ±1%

• 2.25-MHz Fixed Frequency Operation 

• Typical 32-μA Quiescent Current for Both

• Output Current: 600 mA and 1000 mA Converters

• 100% Duty Cycle for Lowest Dropout 

• Adjustable Output Voltage From 0.6 V to VIN

• Available in a 10-Pin QFN (3×3mm) 

• EasyScale™ Optional One-Pin Serial Interfacefor Dynamic Output Voltage Adjustment