Overview
The TPS51120RHBR is a highly sophisticated dual-channel synchronous buck controller designed by Texas Instruments. It is specifically tailored for notebook computer systems, allowing it to run directly off a three- or four-cell Li-ion battery. This controller provides high-power and 5-V and/or 3.3-V standby regulation for downstream circuitry, making it an ideal solution for system and I/O power supplies in notebooks. The device features high-current, 100-mA, 5-V or 3.3-V on-board linear regulators with glitch-free switch over to SMPS, which can be kept alive independently during standby state.
Key Specifications
| Parameter | Value |
|---|---|
| Package | VQFN (RHB) with 32 pins |
| Operating Temperature Range | -40°C to 85°C |
| Supply Input Voltage Range | 4.5 V to 28 V |
| Internal Reference Accuracy | Less than 1% |
| Standby Regulators | 3.3-V and 5-V, 100-mA Bootstrapped Standby Regulators with Independent Enables |
| Current Sensing | Low-side RDS(on) Loss-less Current Sensing and RSENSE Accurate Current Sense Option |
| Gate Drivers | Adaptive Gate Drivers with Integrated Boost Diode |
| Power Good | Power-good for Each Channel with Delay Timer |
| Fault Protection | Fault Disable Mode, Dynamic UVP, OCP, OTP |
Key Features
- Selectable D-CAP™ Mode Enables Fast Transient Response Less than 100 ns
- Selectable Low Ripple Current Mode
- Selectable PWM-only/Auto-skip Modes
- Internal Soft-Start and Integrated VOUT Discharge Transistors
- Integrated 2-V Reference
- Pseudo-constant Frequency Adaptive On-time Control Scheme
- Glitch-free Switch Over Function to SMPS for On-board Linear Regulators
- Dynamic UVP Supports VIN Line Sag Without Latch Off
Applications
The TPS51120RHBR is primarily designed for use in notebook computer systems, particularly for system and I/O power supplies. It is suitable for applications requiring high-power and efficient voltage regulation, such as:
- Notebook computer power management
- System bus supply solutions
- High-current DC-DC conversion
- Standby power regulation
Q & A
- What is the operating temperature range of the TPS51120RHBR?
The operating temperature range is -40°C to 85°C. - What is the supply input voltage range for the TPS51120RHBR?
The supply input voltage range is 4.5 V to 28 V. - What types of standby regulators does the TPS51120RHBR feature?
The device features 3.3-V and 5-V, 100-mA Bootstrapped Standby Regulators with Independent Enables. - Does the TPS51120RHBR support different current sensing options?
Yes, it supports Low-side RDS(on) Loss-less Current Sensing and RSENSE Accurate Current Sense Option. - What kind of gate drivers are integrated into the TPS51120RHBR?
The device includes Adaptive Gate Drivers with Integrated Boost Diode. - Does the TPS51120RHBR have power good indicators?
Yes, it has Power-good for Each Channel with Delay Timer. - What fault protection mechanisms are available in the TPS51120RHBR?
The device features Fault Disable Mode, Dynamic UVP, OCP, and OTP. - Can the TPS51120RHBR operate in different control modes?
Yes, it supports both D-CAP mode and current mode operation. - How does the pseudo-constant frequency adaptive on-time control scheme benefit the TPS51120RHBR?
This scheme supports full range of current mode operation, including simplified loop compensation and seamless transition to reduced frequency operation at light-load conditions. - What is the primary application of the TPS51120RHBR?
The primary application is in notebook computer systems for system and I/O power supplies.
