Texas Instruments TPS40322

Description

The TPS40322 is a dual-output, synchronous buck controller. It can also be configured as a single- output, two-phase controller. The 180° out-of-phaseoperation reduces the input current ripple and extends the input capacitor lifetime. Bi-directional master/slave synchronization function provides evenlydistributed phase shift for a four-output system that reduces input ripple further and attenuates the system noise.The wide input range can support 3.3-V, 5-V, and 12-V buses. The accurate reference voltage satisfies the precision voltage needed by ASICs and potentially reduces the output capacitance requirement. Separate PGOOD signals provide flexibility for system monitoring and sequencing. The two channels are independently controlled and each soft-start time is programmable. Voltage mode control is implemented to reduce noise sensitivity and also ensures low duty ratio conversion.

Features

• Dual-Output or Two-Phase Synchronous Buck Controller
• 180° Out-of-Phase Reduces Input Ripple
• Input Voltage Range from 3 V to 20 V
• Output Voltage Range: 0.6 V to 5.6 V
• Adjustable Frequency 100 kHz to 1 MHz
• Bidirectional SYNC Pin with 0°/180° or 90°/270° Phase Shift
• Voltage Mode Control With Input Feed-Forward
• Accurate Current Sharing for Two-Phase Operation
• Individual PowerGood Outputs
• Individual Enable and Programmable Soft Start, With Pre-Bias Start-up
• ±0.5%, 600-mV Reference
• Output UV/OV Protection and Input Undervoltage Lockout
• Individual Overcurrent Limit Setting
• Hiccup Overcurrent Protection
• Accurate Inductor DCR or Resistive Current Sensing
• Remote Sense for Two-Phase Applications
• Internal N-Channel FET Drivers
• Integrated Bootstrap Switches
• Available in 5 mm × 5 mm 32-Pin QFN Package

Typical applications

• Switcher/Router Networking
• Telecom Base Station
• Multiple Rail Systems
• Server and Storage System
• xDSL Broadband Access

More information

• Datasheet
• IC product information