Overview
The TPS70351PWPG4, 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 involving digital signal processors (DSPs), processors, ASICs, and FPGAs. It offers dual regulated output voltages, fast transient response, and high accuracy, making it ideal for high-performance power management needs.
The TPS70351PWPG4 features independent enable functions, programmable sequencing, and integrated supervisory circuits such as power-on reset (RESET) and power good (PG1) indicators. These features ensure reliable and efficient power supply to the system.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltages | 3.3 V / 1.8 V | V |
| Output Current (Regulator 1) | 0 - 1 A | A |
| Output Current (Regulator 2) | 0 - 2 A | A |
| Input Voltage Range | 2.7 - 6 V | V |
| Quiescent Current | 185 mA (typ) | mA |
| Standby Current | 2 mA | mA |
| Power Supply Rejection Ratio (PSRR) | 65 dB (Regulator 1), 60 dB (Regulator 2) | dB |
| Thermal Shutdown Junction Temperature | +150 °C | °C |
| Package | 24-Pin PowerPAD™ TSSOP | |
| Operating Temperature Range | -40 °C to +125 °C | °C |
Key Features
- Dual Output Voltages for Split-Supply Applications
- Independent Enable Functions
- Programmable Sequencing
- Fast Transient Response
- Low Noise: 78 mVRMS Without Bypass Capacitor
- Quick Output Capacitor Discharge Feature
- Two Manual Reset Inputs
- 2% Accuracy Over Load and Temperature
- Undervoltage Lockout (UVLO) Feature
- Open Drain Power-On Reset with 120 ms Delay
- Open Drain Power Good for Regulator 1
- Thermal Shutdown Protection
Applications
The TPS70351PWPG4 is designed for various high-performance applications, including:
- Digital Signal Processors (DSPs)
- Processors and Microcontrollers
- Application-Specific Integrated Circuits (ASICs)
- Field-Programmable Gate Arrays (FPGAs)
- Other digital systems requiring dual regulated output voltages
Q & A
- What are the output voltages of the TPS70351PWPG4?
The TPS70351PWPG4 provides dual output voltages of 3.3 V and 1.8 V.
- What is the maximum output current for each regulator?
The maximum output current for Regulator 1 is 1 A, and for Regulator 2 is 2 A.
- What is the input voltage range for the TPS70351PWPG4?
The input voltage range is from 2.7 V to 6 V.
- What is the quiescent current of the device?
The quiescent current is typically 185 mA.
- Does the device have thermal shutdown protection?
- How does the programmable sequencing work?
The sequencing can be programmed to turn on the outputs in a specific order. For example, VOUT2 can be turned on first, and VOUT1 turns on once VOUT2 reaches approximately 83% of its regulated voltage.
- What is the purpose of the RESET and PG1 pins?
The RESET pin provides an active low, open drain power-on reset output, and the PG1 pin reports the voltage condition at VOUT1, indicating power good status.
- What is the package type of the TPS70351PWPG4?
The device is packaged in a 24-Pin PowerPAD™ TSSOP.
- What are the operating temperature ranges for the device?
The operating temperature range is from -40 °C to +125 °C.
- Does the device have undervoltage lockout (UVLO) protection?
