Overview
The TPS70145PWPR is a dual-channel low-dropout voltage regulator produced by Texas Instruments. This device is designed for split-supply applications and features integrated supervisory functions, including power-on reset (POR) and power-good indicators. The TPS70145PWPR is particularly suited for digital signal processing (DSP) systems and other applications requiring stable and regulated voltage outputs.
Key Specifications
| Parameter | Unit | Value |
|---|---|---|
| Input Voltage Range (VIN1, VIN2) | V | –0.3 to +7 |
| Output Voltage Range (VOUT1, VSENSE1) | V | Up to 5.5 |
| Output Voltage Range (VOUT2, VSENSE2) | V | Up to 5.5 |
| Output Current (Regulator 1) | mA | 500 |
| Output Current (Regulator 2) | mA | 250 |
| Maximum RESET, PG1 Voltage | V | 7 |
| Maximum MR1, MR2, and SEQ Voltage | V | VIN1 |
| Junction Temperature Range | °C | –40 to +150 |
| Storage Temperature Range | °C | –65 to +150 |
| ESD Rating, HBM | kV | 2 |
Key Features
- Dual Output Voltages: Suitable for split-supply applications, providing two independent regulated voltage outputs.
- Selectable Power-Up Sequencing: Allows programming of the power-up sequence, with the option to turn on VOUT2 first and then VOUT1, or vice versa, making it ideal for DSP applications.
- Low Quiescent Current: Features a low and stable quiescent current over the full load range, using a PMOS transistor for current passing.
- Power-On Reset (POR): Includes an open-drain power-on reset output with a 120ms delay, indicating the status of VOUT2 and manual reset pins.
- Power-Good Indicators: Provides open-drain power-good outputs (PG1) to indicate the status of the VOUT1 regulator.
- Manual Reset Inputs: Includes two manual reset input pins (MR1 and MR2) that can trigger a reset condition when pulled low.
- Undervoltage Lockout (UVLO): Prevents the internal regulators from turning on until VIN1 reaches 2.5V.
- Thermal Shutdown Protection: Protects the device from overheating by shutting down the regulators when the junction temperature exceeds a certain threshold.
Applications
The TPS70145PWPR is designed for various applications requiring dual regulated voltage outputs, including:
- Digital Signal Processing (DSP) systems
- Split-supply systems
- Telecommunications equipment
- Industrial control systems
- Embedded systems requiring stable and regulated power supplies
Q & A
- What is the input voltage range for the TPS70145PWPR?
The input voltage range for VIN1 and VIN2 is –0.3V to +7V.
- What are the output current capabilities of the TPS70145PWPR?
The device can supply up to 500mA on Regulator 1 and up to 250mA on Regulator 2.
- Does the TPS70145PWPR have power-on reset functionality?
Yes, it includes an open-drain power-on reset output with a 120ms delay.
- How does the power-up sequencing work on the TPS70145PWPR?
The device allows selectable power-up sequencing, where VOUT2 can be turned on first and then VOUT1, or vice versa, based on the state of the SEQ terminal.
- What is the purpose of the manual reset pins (MR1 and MR2)?
The manual reset pins are used to trigger a reset condition when either MR1 or MR2 is pulled to a logic low state).
- Does the TPS70145PWPR have thermal shutdown protection?
Yes, the device includes thermal shutdown protection to prevent overheating).
- What is the operating temperature range of the TPS70145PWPR?
The operating temperature range is –40°C to +125°C).
- What is the storage temperature range for the TPS70145PWPR?
The storage temperature range is –65°C to +150°C).
- What is the ESD rating of the TPS70145PWPR?
The ESD rating is 2kV (HBM)).
- What package type is the TPS70145PWPR available in?
The device is available in a 20-pin HTSSOP (PWP) package).
