Overview
The TPS76318DBVT is a low-dropout (LDO) linear voltage regulator from Texas Instruments, part of the TPS763xx family. This regulator is designed to offer low-dropout voltage, low-power operation, and miniaturized packaging, making it ideal for cost-sensitive designs and applications where board space is limited. The TPS76318DBVT is particularly suited for use in portable systems such as laptops and cellular phones, where its low-dropout voltage and low-power features significantly extend battery life.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage | VI = 2.7 V, 1 mA < IO < 75 mA, TJ = 25°C | 1.746 | 1.8 | 1.854 | V |
| Dropout Voltage | IO = 150 mA, TJ = 25°C | 180 | 225 | 300 | mV |
| Quiescent Current | EN = IN, IO = 0 mA, TJ = 25°C | - | 140 | - | µA |
| Operating Junction Temperature | - | -40 | - | 125 | °C |
| Package | - | - | 5-pin SOT-23 (DBV) | - | - |
| Enable Input Current | EN = 0 V | -0.01 | -0.5 | - | µA |
Key Features
- 150-mA, low-dropout regulator with output voltage options including 1.8 V, among others.
- Typically 300 mV dropout voltage at 150 mA of load current.
- Thermal protection and overcurrent limitation to prevent device damage.
- Less than 2-µA quiescent current in shutdown mode.
- Operating junction temperature range of –40°C to 125°C.
- Logic-enabled sleep mode to reduce quiescent current to 1 µA maximum at TJ = 25°C.
- Available in fixed-voltage and variable versions (programmable over the range of 1.5 V to 6.5 V).
Applications
- Electricity meters
- Solar inverters
- HVAC systems
- Servo drives and motion control
- Sensor transmitters
- Portable systems such as laptops and cellular phones
Q & A
- What is the typical dropout voltage of the TPS76318DBVT at 150 mA load current?
The typical dropout voltage is 300 mV at 150 mA of load current.
- What is the quiescent current in shutdown mode?
The quiescent current in shutdown mode is less than 2 µA.
- What is the operating junction temperature range of the TPS76318DBVT?
The operating junction temperature range is –40°C to 125°C.
- What type of package is the TPS76318DBVT available in?
The TPS76318DBVT is available in a 5-pin SOT-23 (DBV) package.
- Does the TPS76318DBVT have thermal protection?
- What is the purpose of the enable input (EN) on the TPS76318DBVT?
The enable input (EN) is an active-high digital control that enables the LDO when the enable voltage is past the rising threshold and disables the LDO when the enable voltage is below the falling threshold.
- What are the recommended input and output capacitors for the TPS76318DBVT?
Texas Instruments recommends a 0.047-µF or larger ceramic bypass input capacitor and a 4.7-µF output capacitor for optimal performance.
- Can the TPS76318DBVT be used in variable voltage applications?
- What is the current limiting feature of the TPS76318DBVT?
The TPS76318DBVT limits output current to approximately 800 mA and scales back the output voltage linearly during overcurrent conditions.
- How does the TPS76318DBVT handle reverse current?
The PMOS pass element includes a back diode that safely conducts reverse current when the input voltage level drops below the output voltage level.
