Overview
The TPS70148PWPR from Texas Instruments is a member of the TPS701xx family of low dropout (LDO) voltage regulators. This device is designed to provide dual regulated output voltages, making it ideal for high-performance power management solutions, particularly in DSP (Digital Signal Processing) and other digital applications. The TPS70148PWPR offers features such as programmable power-up sequencing, fast transient response, and high accuracy, which are crucial for reliable operation in complex digital systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range (VIN1, VIN2) | -0.3 to +7 | V |
| Output Voltage Options | 3.3V/1.5V | V |
| Output Current (Regulator 1) | 500 mA | A |
| Output Current (Regulator 2) | 250 mA | A |
| Quiescent Current | 190 mA (typ) | mA |
| Power-Up Sequence Control | Programmable (SEQ terminal) | - |
| Reset (SVS, POR) | Open drain output with 120ms delay | - |
| Power Good (PG1) | Open drain output | - |
| Operating Temperature Range | -40°C to +125°C | °C |
| Package Type | HTSSOP-20 | - |
Key Features
- Programmable Power-Up Sequencing: The device allows for programmable power-up sequencing through the SEQ terminal, enabling flexible control over which output voltage is turned on first.
- Fast Transient Response: The TPS70148PWPR features fast transient response, ensuring stable output voltages even under rapid changes in load current.
- High Accuracy: The device provides high accuracy with small output capacitors, making it suitable for applications requiring precise voltage regulation.
- Low Quiescent Current: The regulator draws an ultra-low quiescent current of 190 mA (typ), which remains virtually constant over the full load range.
- Integrated SVS and Power Good: The device includes an integrated Supervisory Voltage (SVS) circuit with a power-on reset (POR) and a power good (PG1) output to monitor the output voltages and provide logic outputs to the system.
- Manual Reset Inputs: The device has manual reset inputs (MR1 and MR2) that can trigger a reset condition when pulled to a logic low state.
- Enable Feature: The EN terminal allows the device to be enabled or shut down, reducing input currents to less than 3 mA in shutdown mode.
Applications
The TPS70148PWPR is primarily designed for DSP applications and other digital systems that require dual output voltages with power-up sequence control. It is also suitable for:
- FPGA (Field-Programmable Gate Array) applications
- Digital signal processing systems
- High-performance computing systems
- Embedded systems requiring precise power management
Q & A
- What is the primary application of the TPS70148PWPR?
The TPS70148PWPR is primarily designed for DSP (Digital Signal Processing) applications and other digital systems requiring dual output voltages with power-up sequence control.
- What are the output voltage options for the TPS70148PWPR?
The TPS70148PWPR provides output voltage options of 3.3V and 1.5V.
- What is the maximum output current for each regulator?
The maximum output current for Regulator 1 is 500 mA, and for Regulator 2, it is 250 mA.
- How does the power-up sequencing work?
The power-up sequencing is programmable through the SEQ terminal. When the SEQ terminal is pulled high or left open, VOUT2 powers up first, and VOUT1 turns on after VOUT2 reaches approximately 83% of its regulated output voltage.
- What is the quiescent current of the TPS70148PWPR?
The quiescent current is typically 190 mA.
- What is the purpose of the SVS (Power-On Reset) and Power Good (PG1) outputs?
The SVS (Power-On Reset) output monitors the output voltages and provides a reset signal in case of an undervoltage condition. The Power Good (PG1) output indicates the status of the VOUT1 regulator.
- How does the enable feature work?
The EN terminal enables or shuts down the device. When EN is low, the device is enabled; when EN is high, the device is in shutdown mode, reducing input currents to less than 3 mA.
- What is the operating temperature range of the TPS70148PWPR?
The operating temperature range is -40°C to +125°C.
- What package type is the TPS70148PWPR available in?
The device is available in an HTSSOP-20 package.
- What are the manual reset inputs used for?
The manual reset inputs (MR1 and MR2) are used to trigger a reset condition when pulled to a logic low state.
