Overview
The TPS70445PWP, produced by Texas Instruments, is a dual-output low-dropout (LDO) voltage regulator designed for split-voltage systems. This device is part of the TPS704xx family, which offers advanced features such as independent enable functions, fast transient response, and integrated system voltage supervisor (SVS) functions including power-on reset (POR) and power good (PG) indicators.
The TPS70445PWP is housed in a 24-pin HTSSOP (PWP) package and operates over a wide temperature range from -40°C to 125°C. It is suitable for applications requiring dual regulated output voltages with high accuracy and low noise, making it ideal for various electronic systems that demand reliable power management.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN1, VIN2) | -0.3 | 7 | V | |
| Output Voltage Range (VOUT1, VSENSE1) | 5.5 | V | ||
| Output Voltage Range (VOUT2, VSENSE2) | 5.5 | V | ||
| Output Current (Regulator 1) | 0 | 1 | A | |
| Output Current (Regulator 2) | 0 | 2 | A | |
| Dropout Voltage (Regulator 1) | 160 mV | mV | ||
| Operating Junction Temperature Range | -40 | 125 | °C | |
| Storage Temperature Range | -65 | 150 | °C | |
| ESD Rating, HBM | 2 kV |
Key Features
- Dual Output Voltages for Split-Supply Applications: Fixed voltage options such as 3.3-V/2.5-V, 3.3-V/1.8-V, 3.3-V/1.5-V, and 3.3-V/1.2-V, as well as adjustable voltage options.
- Independent Enable Functions: Each regulator has separate enable inputs (EN1 and EN2) allowing for independent control of each output.
- Fast Transient Response: Stable with small output capacitors (e.g., 47-mF low ESR capacitors) and low noise output performance without additional filter bypass capacitors.
- Low Dropout Voltage: Typically 160 mV on regulator 1, directly proportional to the output current.
- Low Quiescent Current: Maximum of 250 μA over the full range of output current and temperature.
- Integrated SVS (RESET, POR, or power on reset) and Power Good (PG1, PG2) Functions: Monitors output voltages and provides logic output to the system.
- Sleep Mode: Applying a high signal to both EN1 and EN2 shuts down both regulators, reducing input current to 2 mA at TJ = +25°C.
- Internal Discharge Transistors: Discharge output capacitors when regulators are turned off.
Applications
The TPS70445PWP is suitable for a variety of applications requiring reliable and efficient power management, including:
- Split-voltage systems in industrial and automotive electronics.
- Telecommunication equipment and networking devices.
- Medical devices and diagnostic equipment.
- Consumer electronics such as set-top boxes and gaming consoles.
- Embedded systems and microcontrollers requiring dual regulated voltages.
Q & A
- What is the maximum output current for Regulator 1 and Regulator 2?
Regulator 1 can support up to 1 A, and Regulator 2 can support up to 2 A.
- What are the typical dropout voltages for the TPS70445PWP?
The typical dropout voltage for Regulator 1 is 160 mV.
- How do the enable functions work on the TPS70445PWP?
Each regulator has separate enable inputs (EN1 and EN2), allowing for independent control of each output. Applying a high signal to both EN1 and EN2 shuts down both regulators.
- What is the operating junction temperature range for the TPS70445PWP?
The operating junction temperature range is from -40°C to 125°C.
- Does the TPS70445PWP have integrated power-on reset and power good functions?
- What is the package type and pin count of the TPS70445PWP?
The device is packaged in a 24-pin HTSSOP (PWP) package.
- What are the storage temperature range and ESD rating for the TPS70445PWP?
The storage temperature range is from -65°C to 150°C, and the ESD rating is 2 kV (HBM).
- How does the sleep mode function work on the TPS70445PWP?
Applying a high signal to both EN1 and EN2 shuts down both regulators, reducing the input current to 2 mA at TJ = +25°C.
- What type of capacitors are recommended for use with the TPS70445PWP?
The device is stable with small output capacitors, such as 47-mF low ESR capacitors.
- Does the TPS70445PWP have internal discharge transistors?
