Overview
The TPS40322RHBR, produced by Texas Instruments, is a dual-output or two-phase synchronous buck controller. This device is highly versatile, capable of operating in either dual-output or single-output two-phase configurations. It features 180° out-of-phase operation, which significantly reduces input current ripple and extends the lifespan of the input capacitor. The controller supports a wide input voltage range of 3 V to 20 V and output voltage range of 0.6 V to 5.6 V, making it suitable for various power supply applications, including 3.3-V, 5-V, and 12-V buses.
The TPS40322RHBR incorporates advanced features such as bidirectional master and slave synchronization, voltage mode control with input feedforward, and accurate current sharing for two-phase operation. It also includes individual power good outputs, programmable soft-start, and pre-bias start-up capabilities. The device is packaged in a 5-mm × 5-mm 32-pin VQFN package, enhancing thermal performance and compactness.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 3 | - | 20 | V |
| Output Voltage Range | 0.6 | - | 5.6 | V |
| Switching Frequency | 100 kHz | - | 1 MHz | - |
| UVLO Minimum Turn-on Voltage | 1.21 | 1.24 | 1.27 | V |
| Operating Junction Temperature | -40 | - | 125 | °C |
| Package Type | - | - | 5-mm × 5-mm 32-Pin VQFN | - |
| Junction-to-Ambient Thermal Resistance | - | - | 37.1 | °C/W |
Key Features
- Dual-output or single-output two-phase synchronous buck controller
- 180° out-of-phase operation to reduce input current ripple and extend input capacitor lifetime
- Bidirectional master and slave synchronization with 0°/180° or 90°/270° phase shift
- Voltage mode control with input feedforward to reduce noise sensitivity
- Accurate current sharing for two-phase operation
- Individual power good outputs and programmable soft-start with pre-bias start-up
- ±0.5%, 600-mV reference voltage
- Output UV/OV protection and input undervoltage lockout
- Individual overcurrent limit setting and hiccup overcurrent protection
- Accurate inductor DCR or resistive current sensing
- Remote sense for two-phase applications
- Internal N-channel FET drivers and integrated bootstrap switches
Applications
- Multiple rail systems
- Telecom base stations
- Switcher and router networking
- xDSL broadband access
- Server and storage systems
Q & A
- What is the input voltage range of the TPS40322RHBR?
The input voltage range is from 3 V to 20 V.
- What are the possible output voltage ranges for this controller?
The output voltage range is from 0.6 V to 5.6 V.
- What is the significance of the 180° out-of-phase operation?
The 180° out-of-phase operation reduces input current ripple and extends the input capacitor lifetime.
- What types of synchronization does the TPS40322RHBR support?
The device supports bidirectional master and slave synchronization with 0°/180° or 90°/270° phase shift.
- Does the TPS40322RHBR have built-in protection features?
Yes, it includes output UV/OV protection, input undervoltage lockout, and individual overcurrent limit setting with hiccup overcurrent protection.
- How is the soft-start time programmed in the TPS40322RHBR?
The soft-start time is programmed using a capacitor connected to the ENx/SSx pin, which is charged by an internal current source of 10 μA.
- What is the package type and size of the TPS40322RHBR?
The device is packaged in a 5-mm × 5-mm 32-pin VQFN package.
- What are some typical applications of the TPS40322RHBR?
Typical applications include multiple rail systems, telecom base stations, switcher and router networking, xDSL broadband access, and server and storage systems.
- Does the TPS40322RHBR support remote sensing for two-phase applications?
Yes, it supports remote sensing for two-phase applications.
- What is the thermal performance of the TPS40322RHBR?
The device has a junction-to-ambient thermal resistance of 37.1 °C/W.
