Texas Instruments TPS7A7850PWPT
- Part Number:
- TPS7A7850PWPT
- Manufacturer:
- Texas Instruments
- Ventron No:
- 6399406-TPS7A7850PWPT
- Description:
- 120-mA, smart, capacitance-drop, low-dropout (LDO) linear voltage regulator
- Datasheet:
- tps7a78
- Output optionsFixed Output
- Iout (max) (A)0.12
- Vin (max) (V)23
- Vin (min) (V)17
- Vout (max) (V)5
- Vout (min) (V)1.25
- Fixed output options (V)3.3
- Iq (typ) (mA)0.28
- Thermal resistance θJA (°C/W)48
- RatingCatalog
- Load capacitance (min) (μF)1
- Regulated outputs (#)1
- FeaturesAC/DC regulation
- Accuracy (%)2
- Operating temperature range (°C)-40 to 125
The TPS7A78 improves the overall efficiency and standby-power in power-supplies in aneasy-to-use, non-magnetic approach to AC/DC conversion. The TPS7A78 uses a capacitor-droparchitecture to lower the AC source voltage before actively clamping the rectified voltage. Thedevice 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 ofmilliwatts. The TPS7A78 switched-capacitor stage reduces power losses by stepping down therectified input voltage by a factor of four and increasing the output-to-input current by the sameratio, as given by PIN ≅ POUT andVIN ≅ VOUT × 4. Compared to a traditionalcapacitor-drop (cap-drop) stage, this step down reduces input current, thus minimizing the value ofthe capacitance needed.
Electricity-metering applications, where the power supply must be reliable and magnetictamper-proof, benefits from using the TPS7A78 because this device does not require externalmagnetics. This feature makes complying with IEC 61000-4-8 easier while minimizing magneticshielding cost.
Additionally, the TPS7A78 also comes with a user-programmable, power-fail detectionthreshold that can provide an early alert to power failures and enable shutdown before completepower loss. The power-good indicator (PG) is also provided for sequencing or resetting amicrocontroller.
The TPS7A78 is available in a 14-pin HTSSOP (PWP) package.
Smart AC/DC Linear Voltage Regulator 120mA 5V 14-Pin HTSSOP T/R
IC REG LINEAR 5V 120MA 14HTSSOP
TPS7A7850 Tape & Reel (TR) Surface Mount Over Current Over Temperature Under Voltage Lockout (UVLO) voltage regulator linear 5V 5mm 120mA -40C~125C TJ
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