Overview
The TPS70148PWPG4, part of the TPS701xx family, is a dual-output low dropout voltage regulator designed by Texas Instruments. This device is specifically tailored for high-performance power management solutions, particularly in Digital Signal Processor (DSP) applications, as well as in other digital systems such as ASICs, FPGAs, and more. The TPS70148PWPG4 offers dual regulated output voltages, programmable power-up sequencing, and a range of features that enhance system reliability and reduce component cost and board space.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range (VIN1, VIN2) | -0.3 to +7 | V |
| Output Voltage Range (VOUT1, VSENSE1) | 5.5 | V |
| Output Voltage Range (VOUT2, VSENSE2) | 5.5 | V |
| Output Current (Regulator 1) | 500 mA | mA |
| Output Current (Regulator 2) | 250 mA | mA |
| Quiescent Current | 190 mA (typ) | mA |
| Junction Temperature Range | -40 to +150 | °C |
| Storage Temperature Range | -65 to +150 | °C |
| ESD Rating (HBM) | 2 kV | kV |
| Package Type | HTSSOP-20 (PWP) | |
| Minimum Input Voltage for Valid RESET | 1.0 to 1.3 V | V |
| RESET Pulse Duration | 80 to 120 ms | ms |
Key Features
- Dual regulated output voltages for split-supply applications, such as 3.3V/1.5V, 3.3V/1.8V, and adjustable outputs.
- Selectable power-up sequencing for DSP applications, allowing either VOUT1 or VOUT2 to power up first.
- Fast transient response and high accuracy with small output capacitors.
- Ultra-low quiescent current of 190 mA (typ).
- Open drain Power-On Reset (RESET) with a 120ms delay and open drain Power Good (PG1) output.
- Manual reset inputs (MR1 and MR2) for triggering a reset condition.
- Enable feature that puts the device in sleep mode, reducing input currents to less than 3 mA.
- Undervoltage lockout (UVLO) circuit that prevents the internal regulators from turning on until VIN1 reaches 2.5 V.
Applications
The TPS70148PWPG4 is designed for various high-performance digital applications, including:
- Digital Signal Processor (DSP) systems, particularly the TMS320™ DSP family.
- Application-Specific Integrated Circuits (ASICs).
- Field-Programmable Gate Arrays (FPGAs).
- Other digital systems requiring dual output voltage regulators with power sequencing capabilities.
Q & A
- What is the primary application of the TPS70148PWPG4?
The TPS70148PWPG4 is primarily designed for high-performance power management in Digital Signal Processor (DSP) applications and other digital systems such as ASICs and FPGAs.
- What are the output voltage options for the TPS70148PWPG4?
The device offers fixed output voltage combinations such as 3.3V/1.5V, 3.3V/1.8V, and also adjustable output options.
- What is the quiescent current of the TPS70148PWPG4?
The quiescent current is typically 190 mA.
- How does the power-up sequencing work on the TPS70148PWPG4?
The power-up sequencing can be programmed to either power up VOUT1 or VOUT2 first, controlled by the SEQ terminal.
- What is the purpose of the RESET and PG1 terminals?
The RESET terminal provides an open drain Power-On Reset signal, while the PG1 terminal indicates the status of VOUT1 with an open drain Power Good signal.
- How do the manual reset inputs (MR1 and MR2) function?
MR1 and MR2 are active low input terminals that trigger a reset condition when pulled to logic low.
- What is the minimum input voltage required for the internal regulators to turn on?
The internal regulators will not turn on until VIN1 reaches 2.5 V due to the undervoltage lockout (UVLO) circuit.
- What is the junction temperature range of the TPS70148PWPG4?
The junction temperature range is -40°C to +150°C.
- What package type is the TPS70148PWPG4 available in?
The device is available in the HTSSOP-20 (PWP) package.
- What is the ESD rating of the TPS70148PWPG4?
The ESD rating is 2 kV (HBM).
