TPS7A7836 Series
120-mA, smart, capacitance-drop, low-dropout (LDO) linear voltage regulator
Manufacturer: Texas Instruments
Catalog(1 parts)
| Part | Operating Temperature▲▼ | Operating Temperature▲▼ | Number of Regulators▲▼ | Protection Features | Output Configuration | Voltage - Output (Min/Fixed)▲▼ | Package / Case▲▼ | Package / Case▲▼ | Package / Case | Supplier Device Package | Control Features | Mounting Type | Current - Output▲▼ | Output Type▲▼ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
125 °C | -40 °C | 1 ul | Over Current, Over Temperature, Under Voltage Lockout (UVLO) | Positive | 3.5999999046325684 V | 0.004399999976158142 m | 0.004394200164824724 m | 14-PowerTSSOP | 14-HTSSOP | Enable | Surface Mount | 0.119999997317791 A | 27.030000686645508 °C/W |
Key Features
• Non-isolated power solution for ≥ 18 VAC RMS:Up to 75% efficiencyStandby power consumption: 15 mW (typical)Line-voltage, cap-drop capacitor as small as 1/4th the size of linear solutionsAvailable in fixed output voltages:1.3 V to 5 V (50-mV steps)Power-fail detectionPower-good indication1% typical accuracyPackage:5-mm × 6.5-mm HTSSOP-14 (PWP)Non-isolated power solution for ≥ 18 VAC RMS:Up to 75% efficiencyStandby power consumption: 15 mW (typical)Line-voltage, cap-drop capacitor as small as 1/4th the size of linear solutionsAvailable in fixed output voltages:1.3 V to 5 V (50-mV steps)Power-fail detectionPower-good indication1% typical accuracyPackage:5-mm × 6.5-mm HTSSOP-14 (PWP)
Description
AI
The TPS7A78 improves the overall efficiency and standby-power in power-supplies in an easy-to-use, non-magnetic approach to AC/DC conversion. The TPS7A78 uses a capacitor-drop architecture to lower the AC source voltage before actively clamping the rectified voltage. The device then regulates this rectified voltage down to the application-specific operating voltage. The unique architecture of the device allows the standby power to be reduced to just a few 10s of milliwatts. The TPS7A78 switched-capacitor stage reduces power losses by stepping down the rectified input voltage by a factor of four and increasing the output-to-input current by the same ratio, as given by PIN≅ POUTand VIN≅ VOUT× 4. Compared to a traditional capacitor-drop (cap-drop) stage, this step down reduces input current, thus minimizing the value of the capacitance needed.
Electricity-metering applications, where the power supply must be reliable and magnetic tamper-proof, benefits from using the TPS7A78 because this device does not require external magnetics. This feature makes complying with IEC 61000-4-8 easier while minimizing magnetic shielding cost.
Additionally, the TPS7A78 also comes with a user-programmable, power-fail detection threshold that can provide an early alert to power failures and enable shutdown before complete power loss. The power-good indicator (PG) is also provided for sequencing or resetting a microcontroller.
The TPS7A78 is available in a 14-pin HTSSOP (PWP) package.
The TPS7A78 improves the overall efficiency and standby-power in power-supplies in an easy-to-use, non-magnetic approach to AC/DC conversion. The TPS7A78 uses a capacitor-drop architecture to lower the AC source voltage before actively clamping the rectified voltage. The device then regulates this rectified voltage down to the application-specific operating voltage. The unique architecture of the device allows the standby power to be reduced to just a few 10s of milliwatts. The TPS7A78 switched-capacitor stage reduces power losses by stepping down the rectified input voltage by a factor of four and increasing the output-to-input current by the same ratio, as given by PIN≅ POUTand VIN≅ VOUT× 4. Compared to a traditional capacitor-drop (cap-drop) stage, this step down reduces input current, thus minimizing the value of the capacitance needed.
Electricity-metering applications, where the power supply must be reliable and magnetic tamper-proof, benefits from using the TPS7A78 because this device does not require external magnetics. This feature makes complying with IEC 61000-4-8 easier while minimizing magnetic shielding cost.
Additionally, the TPS7A78 also comes with a user-programmable, power-fail detection threshold that can provide an early alert to power failures and enable shutdown before complete power loss. The power-good indicator (PG) is also provided for sequencing or resetting a microcontroller.
The TPS7A78 is available in a 14-pin HTSSOP (PWP) package.