TPS40322RHBR Power Path Management IC Switching Controllers Dual Output or 2-Ph Sync Buck Cntrlr

TPS40322RHBR Power Path Management IC Switching Controllers Dual Output or 2-Ph Sync Buck Cntrlr

1 Features

• Dual-Output or Two-Phase Synchronous Buck Controller

• 180° Out-of-Phase Reduces Input Ripple

• Input Voltage Range: 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 Feedforward

• Accurate Current Sharing for Two-Phase Operation

• Individual Power Good 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 VQFN Package

   

2 Applications

• Multiple Rail Systems

• Telecom Base Station

• Switcher and Router Networking

• xDSL Broadband Access

• Server and Storage System

3 Description

The TPS40322 device is a dual-output, synchronous buck controller. It can also be configured as a single- output, two-phase controller. The 180° out-of-phase operation reduces the input current ripple and extends the input capacitor lifetime. Bidirectional master and slave synchronization function provides evenly distributed 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.

Device Information