TPS62420数据手册集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF

描述 Description

The TPS6242x device is a synchronous dual step-down DC–DC converter. 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 an input voltage range of 2.5 V to 6 V, the TPS6242x is ideal for battery-powered portable applications like smart phones, PDAs, and other portable equipment.

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 TPS6242x operates at 2.25-MHz fixed switching frequency and enter the 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 TPS6242x operates over a free-air temperature range of –40°C to 85°C. It is available in a 10-pin leadless package (3 mm × 3 mm VSON)

特性 Features

• High Efficiency up to 95%
• VIN Range from 2.5 V to 6 V
• 2.25-MHz Fixed Frequency Operation
• Output Current 600 mA and 1000 mA
• Adjustable Output Voltage from 0.6 V to VIN
• Pin Selectable Output Voltage Supports Simple Dynamic VoltageScaling
• Optional EasyScale One-Pin Serial Interface for Dynamic Output Voltage Adjustment
• Power-Save Mode at Light Load Currents
• 180° Out of Phase Operation
• Output Voltage Accuracy in PWM Mode ±1%
• Typical 32-µA Quiescent Current for both Converters
• 100% Duty Cycle for Lowest Dropout
• Available in a 10-Pin VSON (3 mm × 3 mm)