Overview
The TPS70345PWPR, part of the TPS703xx family, is a dual-output low dropout (LDO) voltage regulator designed by Texas Instruments. This device is tailored to provide a comprehensive power management solution for applications requiring dual output voltages, particularly in DSP (Digital Signal Processor), processor, ASIC (Application-Specific Integrated Circuit), and FPGA (Field-Programmable Gate Array) environments. The TPS70345PWPR offers high-performance features such as fast transient response, low quiescent current, and programmable sequencing, making it an ideal choice for systems that demand precise and reliable power management.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN1, VIN2) | -0.3 | - | 7 | V |
| Output Voltage Range (VOUT1, VOUT2) | - | - | 5.5 | V |
| Output Current (Regulator 1) | 0 | - | 1 | A |
| Output Current (Regulator 2) | 0 | - | 2 | A |
| Quiescent Current | - | 185 mA | - | mA |
| Standby Current | - | 2 mA | - | mA |
| Operating Junction Temperature Range | -40 | - | 150 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
| ESD Rating (HBM) | - | - | 2 kV | - |
| Package Type | - | - | 24-Pin PowerPAD™ TSSOP | - |
Key Features
- Dual Output Voltages: Provides dual regulated output voltages, such as 3.3 V/1.2 V, with adjustable options available.
- Fast Transient Response: Ensures stable operation with fast response to load changes.
- Low Quiescent Current: Ultralow quiescent current of 185 mA (typical) and 2 mA in standby mode.
- Programmable Sequencing: Allows for customizable power-up sequencing without external components.
- SVS Supervisory Circuit: Includes power-on reset (POR), manual reset inputs, and power good (PG1) signals.
- High Accuracy: Maintains 2% accuracy over load and temperature.
- Low Noise: Low noise output performance without the need for additional filter bypass capacitors.
- Quick Output Capacitor Discharge: Features an internal discharge transistor to quickly discharge output capacitors when the regulator is turned off.
- Thermal Shutdown Protection: Protects the device from overheating.
- Undervoltage Lockout (UVLO): Prevents output from turning on until the input voltage reaches a specified threshold.
Applications
The TPS70345PWPR is designed for use in various high-performance applications, including:
- DSP (Digital Signal Processor) power management
- Processor power management
- ASIC (Application-Specific Integrated Circuit) power management
- FPGA (Field-Programmable Gate Array) power management
- Other digital systems requiring dual output voltages and precise power sequencing
Q & A
- What is the primary application of the TPS70345PWPR?
The TPS70345PWPR is primarily designed for DSP, processor, ASIC, and FPGA applications that require dual output voltages and precise power management.
- What are the output voltage options for the TPS70345PWPR?
The device offers various output voltage combinations such as 3.3 V/1.2 V, 3.3 V/1.8 V, and adjustable output options.
- What is the quiescent current of the TPS70345PWPR?
The quiescent current is typically 185 mA, and it reduces to 2 mA in standby mode.
- Does the TPS70345PWPR have built-in sequencing capabilities?
- What is the purpose of the RESET and PG1 pins?
The RESET pin provides a power-on reset signal, and the PG1 pin reports the voltage condition at VOUT1, which can be used to implement an SVS (POR) for the circuitry supplied by regulator 1.
- What is the thermal shutdown protection feature?
The device includes thermal shutdown protection to prevent overheating and ensure reliable operation.
- What is the undervoltage lockout (UVLO) feature?
The UVLO feature prevents the output from turning on until the input voltage reaches a specified threshold, ensuring stable operation.
- What is the package type of the TPS70345PWPR?
The device is packaged in a 24-Pin PowerPAD™ TSSOP.
- What are the storage and operating temperature ranges for the TPS70345PWPR?
The storage temperature range is -65°C to +150°C, and the operating junction temperature range is -40°C to +150°C.
- Does the TPS70345PWPR have ESD protection?
The device has an ESD rating of 2 kV (HBM), but it is recommended to handle the device with appropriate ESD precautions to avoid damage.
