78L33 Datasheet – 3.3V, Positive Voltage Regulator

This post explains for the semiconductor 78L33.

The Part Number is 78L33.

The function of this semiconductor is Positive voltage regulators.

Manufacturers : STMicroelectronics


78L33 Regulator

Description :

The L78L series of three-terminal positive regulators employ internal current limiting and thermal shutdown, making them essentially indestructible. If adequate heat-sink is provided, they can deliver up to 100 mA output current. They are intended as fixed voltage regulators in a wide range of applications including local or oncard regulation for elimination of noise and distribution problems associated with single-point regulation. In addition, they can be used with power pass elements to make high-current
voltage regulators. The L78L series used as Zener diode/resistor combination replacement, offers e improvement along with lower quiescent current and lower noise.

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78L33 image



1. Output current up to 100 mA
2. Output voltages of 3.3 V thermal overload protection
3. Short-circuit protection
4. No external components are required



78L33 Datasheet

BD9011 Datasheet PDF – Switching Regulator – ROHM

Part Number : BD9011

Function : Large Current External FET Controller Type Switching Regulator

Package : VQFP48C

Manufacturers : ROHM Semiconductor

Pinouts :
BD9011 datasheet

Description :

The BD9011EKN/KV is a 2-ch synchronous controller with rectification switching for enhanced power manageme It supports a wide input range, enabling low power consumption ecodesign for an array of electronics.


1)  Wide input voltage range: 3.9V to 30V
2)  Precision voltage references: 0.8V±1%
3)  FET direct drive
4)  Rectification switching for increased efficiency
5)  Variable frequency: 250k to 550kHz (external synchronization to 550kHz)
6)  Built-in selected OFF latch and auto remove over current protection
7)  Built-in independent power up/power down sequencing control
8)  Make various application , step-down , step-up and step-up-down

Other data sheets within the file : BD9011EKN, BD9011KV, BD9775, BD9775FV

BD9011 Datasheet PDF