TX78XXM General Description:
The TX78XXM series is a group of positive voltage output, three-pin regulators, it provide a high current even when the input/output voltage differential is small. Low power consumption and high accuracy is achieved through CMOS and laser trimming technologies.
The TX78XXM consists of a high-precision voltage reference, an error amplification circuit, and a current limited output driver. Load Transient response has improved in comparison to the existing series. SOT89, SOT23-3 and SOT23-5 packages are available.
TX78XXM Features:
Low voltage drop: 0.23V@100mA
High input voltage: 15V
Low temperature coefficient
Large Output Current: >0.5A
Low Quiescent Current: 2.0uA
Output voltage accuracy: tolerance ±2%
Built-in current limiter
SOT89,SOT23-3 and SOT23-5 packages
TX78XXM Applications:
Battery-powered equipment
Hand-Hold Equipment
GRS Receivers
Wireless LAN
TX78XXM Selection Table:
Part No. | Output Voltage | Package | Marking |
TX7818Mxx | 1.8V | SOT89 SOT23-3 SOT23-5 | Refer to Marking rule |
TX7828Mxx | 2.8V |
TX7830Mxx | 3.0V |
TX7833Mxx | 3.3V |
TX7836Mxx | 3.6V |
TX7840Mxx | 4.0V |
TX7845Mxx | 4.5V |
TX7850Mxx | 5.0V |
TX78XXM Order Information:
TX78①②③④⑤
Designator | Symbol | Description |
①② | Integer | Output Voltage(1.5~5.0V) |
③ | M | Standard |
④ | P | Package:SOT89 |
M | Package:SOT23-3 |
M5 | Package:SOT23-5 |
⑤ | R | RoHS/Pb Free |
G | Halogen Free |
TX78XXM Block Diagram:

TX78XXM Pin Assignment:

TX78XXM Typical Application:

Note1: Cin=Cout=10uF. (10uF Electrolytic capacitor is recommended).
Note2: If the input and output capacitors are ceramic, add a resistor at the input, as follows.

Note: Re=(1.2~1.8)Ω.

Note1:Input capacitor CIN=10uF.
Note2:Ouput capacitor COUT=10uF/6.8uF(1uF Tantalum capacitor or 6.8uF ceramic capacitor is
recommended).
Note3:The CE port is recommended to connect the current limiting resistor Re. The recommended
resistance is 10K~47K. When the input voltage is larger than or equal to 12V, it is recommended to add a 0.01uF capacitor Ce.