Overview
The TPS70251PWPR is a dual-channel low-dropout voltage regulator produced by Texas Instruments. This device is part of the TPS702xx family, designed to provide high-performance voltage regulation with integrated supervisory functions. It is particularly suited for split-supply applications, offering two independent voltage regulators with various fixed and adjustable output voltage options.
The TPS70251PWPR features a 20-pin HTSSOP (PWP) package and operates over a wide temperature range of -40°C to 125°C. It is capable of supplying 500mA from regulator 1 and 250mA from regulator 2, making it a versatile component for a variety of power management needs.
Key Specifications
| Parameter | Value |
|---|---|
| Package | HTSSOP (PWP) with 20 pins |
| Operating Temperature Range | -40°C to 125°C |
| Output Current (Regulator 1) | Up to 500mA |
| Output Current (Regulator 2) | Up to 250mA |
| Quiescent Current (Typical) | 190µA at full load |
| Input Current During Standby | 1µA |
| Output Voltage Options | Fixed: 3.3V/2.5V, 3.3V/1.8V, 3.3V/1.5V, 3.3V/1.2V; Adjustable |
| Dropout Voltage (Typical) | 170mV on regulator 1 |
| Accuracy Over Load and Temperature | 2% |
| Undervoltage Lockout (UVLO) | VIN1 must reach 2.5V |
| Thermal Shutdown Protection | Yes |
Key Features
- Dual Output Voltages for Split-Supply Applications
- Independent Enable Functions for each regulator
- Fast Transient Response
- Open Drain Power-On Reset with 120ms Delay
- Open Drain Power Good for Regulator 1 and Regulator 2
- Ultralow Quiescent Current: 190µA (typical)
- Low Noise: 65µV RMS without bypass capacitor
- Quick Output Capacitor Discharge Feature
- One Manual Reset Input
- 2% Accuracy Over Load and Temperature
- Undervoltage Lockout (UVLO) Feature
- 20-Pin PowerPAD TSSOP Package
- Thermal Shutdown Protection
Applications
The TPS70251PWPR is suitable for a wide range of applications requiring dual voltage regulation with high accuracy and low noise. These include:
- Split-supply systems where two different voltage levels are required.
- Embedded systems and microcontrollers that need reliable power management.
- Industrial control systems and automation equipment.
- Medical devices requiring precise voltage regulation.
- Telecommunication and networking equipment.
Q & A
- What is the maximum output current for Regulator 1 and Regulator 2 in the TPS70251PWPR?
Regulator 1 can support up to 500mA, and Regulator 2 can support up to 250mA.
- What are the available output voltage options for the TPS70251PWPR?
The device offers fixed voltage options such as 3.3V/2.5V, 3.3V/1.8V, 3.3V/1.5V, 3.3V/1.2V, and adjustable voltage options.
- What is the typical quiescent current of the TPS70251PWPR?
The typical quiescent current is 190µA at full load.
- Does the TPS70251PWPR have thermal shutdown protection?
Yes, the device features thermal shutdown protection.
- What is the undervoltage lockout (UVLO) threshold for the TPS70251PWPR?
The internal regulators will not turn on until VIN1 reaches 2.5V.
- How does the power good (PG) function work in the TPS70251PWPR?
The PG1 and PG2 pins report the voltage conditions at VOUT1 and VOUT2, respectively, and can be used to implement power-on reset functions.
- What is the operating temperature range of the TPS70251PWPR?
The device operates over a temperature range of -40°C to 125°C.
- Does the TPS70251PWPR have a manual reset input?
Yes, the device includes one manual reset input.
- What is the noise performance of the TPS70251PWPR?
The device has low noise output performance, with 65µV RMS without any added filter bypass capacitors.
- How does the quick output capacitor discharge feature work?
The device includes an internal discharge transistor to discharge the output capacitor when the regulator is turned off.
- What package type and pin count does the TPS70251PWPR have?
The device is packaged in a 20-pin HTSSOP (PWP) package.
