Overview
The TPS70351PWP is a dual-output, ultra-low-dropout voltage regulator produced by Texas Instruments. This device is part of the TPS703xx family, designed to provide a complete power management solution for applications requiring dual output voltage regulators, particularly in TI DSP, processor power, ASIC, FPGA, and digital systems. The TPS70351PWP offers easy programmability of the sequencing function, making it ideal for applications with power sequencing requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | HTSSOP (PWP) | - |
| Pins | 24 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Output Current (Regulator 1) | 0 to 1 | A |
| Output Current (Regulator 2) | 0 to 2 | A |
| Output Voltages | 3.3 V / 1.8 V | V |
| Quiescent Current | 185 µA (typ) | A |
| Input Current During Standby | 2 µA | A |
| Noise (RMS Without Bypass Capacitor) | 78 µV | V |
| Thermal Shutdown Junction Temperature | +150 | °C |
| Power Good (PG1) Voltage | Up to 7 V | V |
| RESET Pulse Duration | 80 to 120 ms | ms |
Key Features
- Dual Output Voltages for Split-Supply Applications
- Independent Enable Functions (see Part Number TPS704xx for Independent Enabling of Each Output)
- Fast Transient Response
- Voltage Options: 3.3 V/2.5 V, 3.3 V/1.8 V, 3.3 V/1.5 V, 3.3 V/1.2 V, and Dual Adjustable Outputs
- Open Drain Power-On Reset with 120 ms Delay
- Open Drain Power Good for Regulator 1
- Ultralow 185 µA (typ) Quiescent Current
- 2 µA Input Current During Standby
- Low Noise: 78 µV RMS Without Bypass Capacitor
- Quick Output Capacitor Discharge Feature
- Two Manual Reset Inputs
- 2% Accuracy Over Load and Temperature
- Undervoltage Lockout (UVLO) Feature
- 24-Pin PowerPAD™ TSSOP Package
- Thermal Shutdown Protection
Applications
The TPS70351PWP is designed for various applications, including:
- Texas Instruments DSP (Digital Signal Processor) power management
- Processor power management
- ASIC (Application-Specific Integrated Circuit) and FPGA (Field-Programmable Gate Array) power management
- Digital systems requiring dual output voltage regulators
- Systems needing power sequencing and supervisory functions
Q & A
- What is the TPS70351PWP used for?
The TPS70351PWP is a dual-output, ultra-low-dropout voltage regulator used for power management in applications such as TI DSP, processor power, ASIC, FPGA, and digital systems.
- What are the output voltages of the TPS70351PWP?
The TPS70351PWP provides output voltages of 3.3 V and 1.8 V.
- What is the maximum output current for each regulator?
Regulator 1 can support up to 1 A, and regulator 2 can support up to 2 A.
- What is the quiescent current of the TPS70351PWP?
The quiescent current is typically 185 µA.
- Does the TPS70351PWP have thermal shutdown protection?
- How does the power-up sequencing work?
The power-up sequencing can be controlled via the SEQ terminal, allowing either regulator 1 or regulator 2 to turn on first based on the SEQ pin configuration.
- What is the purpose of the PG1 pin?
The PG1 pin reports the voltage condition at VOUT1 and can be used to implement a power-on reset (POR) for the circuitry supplied by regulator 1.
- What is the RESET function and how does it work?
The RESET is an active low, open drain output that requires a pull-up resistor. It goes to a high impedance state after a 120 ms delay when specific conditions are met, including VIN1 above the undervoltage condition, manual reset pin in a high impedance state, and VOUT2 above approximately 95% of its regulated voltage.
- What is the undervoltage lockout (UVLO) feature?
The UVLO feature prevents each output from turning on until the respective input reaches 2.5 V.
- What is the package type and pin count of the TPS70351PWP?
The device is packaged in a 24-pin HTSSOP (PWP) package.
