Overview
The TPS70145PWPRG4, part of the TPS701xx family, is a dual-output low dropout voltage regulator designed by Texas Instruments. This device is specifically tailored to provide a comprehensive power management solution for split-voltage applications, particularly in DSP (Digital Signal Processing) systems, ASICs, FPGAs, and other digital applications. The TPS70145PWPRG4 offers dual output voltages, selectable power-up sequencing, and a range of features that ensure reliable and efficient power supply.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range (VIN1, VIN2) | -0.3 to +7 | V |
| Output Voltage Range (VOUT1, VSENSE1) | 5.5 | V |
| Output Voltage Range (VOUT2, VSENSE2) | 5.5 | V |
| Output Current (Regulator 1) | 500 mA | |
| Output Current (Regulator 2) | 250 mA | |
| Quiescent Current | 190 mA (typ) | |
| Junction Temperature Range | -40 to +150 | °C |
| Storage Temperature Range | -65 to +150 | °C |
| ESD Rating, HBM | 2 kV | |
| Package Type | HTSSOP-20 (PWP) |
Key Features
- Dual output voltages for split-supply applications (e.g., 3.3V/1.5V, 3.3V/1.8V, etc.)
- Selectable power-up sequencing for DSP applications
- Fast transient response and low dropout voltage
- Open drain power-on reset (POR) with 120ms delay
- Open drain power good (PG1) for Regulator 1
- Manual reset inputs (MR1 and MR2)
- Enable function for power management
- Ultra-low quiescent current
Applications
The TPS70145PWPRG4 is ideal for various applications requiring dual output voltage regulators, including:
- DSP (Digital Signal Processing) systems
- ASIC (Application-Specific Integrated Circuit) and FPGA (Field-Programmable Gate Array) applications
- Digital systems requiring power sequencing
- Other split-voltage power management needs
Q & A
- What is the primary application of the TPS70145PWPRG4?
The TPS70145PWPRG4 is primarily designed for split-voltage applications in DSP systems, ASICs, FPGAs, and other digital applications.
- What are the output voltage options for the TPS70145PWPRG4?
The device offers various output voltage combinations such as 3.3V/1.5V, 3.3V/1.8V, 3.3V/2.5V, and dual adjustable outputs.
- What is the maximum output current for each regulator?
Regulator 1 can provide up to 500 mA, while Regulator 2 can provide up to 250 mA.
- How does the power-up sequencing work?
The power-up sequencing can be controlled via the SEQ terminal, allowing either VOUT1 or VOUT2 to power up first.
- What is the function of the RESET pin?
The RESET pin provides an open drain power-on reset signal, indicating the status of VOUT2 and manual reset inputs.
- What is the quiescent current of the device?
The quiescent current is typically 190 mA.
- What is the operating junction temperature range?
The device operates within a junction temperature range of -40°C to +150°C.
- How does the undervoltage lockout (UVLO) circuit function?
The UVLO circuit prevents the internal regulators from turning on until VIN1 reaches 2.5V.
- What is the purpose of the PG1 and PG2 pins?
The PG1 and PG2 pins are open drain outputs that indicate the voltage status of VOUT1 and VOUT2, respectively.
- What is the package type of the TPS70145PWPRG4?
The device is packaged in an HTSSOP-20 (PWP) package.
