Overview
The TPS70802PWPR from Texas Instruments is a dual-output low-dropout (LDO) voltage regulator designed for split-voltage systems. This device integrates supervisory voltage (SVS) functions, including power-on reset (POR), manual reset, and power good (PG) indicators. It is capable of supplying 250 mA and 125 mA from regulator 1 and regulator 2, respectively, making it suitable for a variety of applications requiring multiple voltage levels.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range (VIN1, VIN2) | -0.3 to +7 | V |
| Output Voltage Range (VOUT1, VSENSE1) | Up to 5.5 | V |
| Output Voltage Range (VOUT2, VSENSE2) | Up to 5.5 | V |
| Output Current (Regulator 1) | 250 mA | |
| Output Current (Regulator 2) | 125 mA | |
| Quiescent Current | 190 µA (typ) | |
| Dropout Voltage (Regulator 1) | 83 mV (typ) | |
| Dropout Voltage (Regulator 2) | 140 mV (typ) | |
| Operating Junction Temperature Range | -40 to +150 | °C |
| Storage Temperature Range | -65 to +150 | °C |
| ESD Rating (HBM) | 2 kV |
Key Features
- Independent enable functions for each regulator.
- Integrated SVS (power-on reset, POR) and power good (PG) functions.
- Low noise output performance without additional filter bypass capacitors.
- Fast transient response and stability with 10-µF low ESR capacitors.
- Ultralow quiescent current of 190 µA (typ).
- Manual reset input with a 120-ms delay.
- Open drain power-on reset and power good outputs.
- Quick output capacitor discharge feature.
- Undervoltage lockout (UVLO) feature.
- Thermal shutdown protection.
- 20-Pin PowerPAD™ TSSOP package.
Applications
The TPS70802PWPR is suitable for various applications requiring dual regulated output voltages, such as:
- Split-voltage systems in industrial and automotive electronics.
- Power supplies for embedded systems and microcontrollers.
- Telecommunication equipment.
- Medical devices requiring multiple voltage levels.
- Consumer electronics with complex power requirements.
Q & A
- What is the maximum output current for Regulator 1 and Regulator 2?
The maximum output current for Regulator 1 is 250 mA, and for Regulator 2, it is 125 mA. - What is the quiescent current of the TPS70802PWPR?
The quiescent current is typically 190 µA. - What are the input voltage ranges for VIN1 and VIN2?
The input voltage ranges for both VIN1 and VIN2 are -0.3 to +7 V. - Does the TPS70802PWPR have thermal shutdown protection?
Yes, it does have thermal shutdown protection. - What is the purpose of the PG1 and PG2 pins?
The PG1 and PG2 pins are open drain outputs that report the voltage conditions at VOUT1 and VOUT2, respectively. - How does the manual reset input work?
The manual reset input (MR) is active low and pulled up internally. When MR is in a high-impedance state, the RESET output goes to a high impedance state after a 120-ms delay. - What is the dropout voltage for Regulator 1 and Regulator 2?
The dropout voltage for Regulator 1 is typically 83 mV, and for Regulator 2, it is typically 140 mV. - Is the TPS70802PWPR available in different package types?
The TPS70802PWPR is available in a 20-Pin PowerPAD™ TSSOP package. - What is the operating junction temperature range for the TPS70802PWPR?
The operating junction temperature range is -40 to +150°C. - Does the device have undervoltage lockout (UVLO) protection?
Yes, the device has an undervoltage lockout (UVLO) feature that prevents the internal regulators from turning on until VIN1 reaches 2.5 V.
