STMicroelectronics L4978D
The L4978 is a step down monolithic power switching regulator delivering 2A at a voltage between 3.3V and 50V (selected by a simple external divider).| Part No. | L4978D |
|---|---|
| Datasheet | L4978D Download |
| Manufacturer |  STMicroelectronics |
| Description | 2A STEP DOWN SWITCHING REGULATOR |
| Buy | Stock & Price |
FEATURES
● UP TO 2A STEP DOWN CONVERTER● OPERATING INPUT VOLTAGE FROM 8V TO 55V
● PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE
● OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V
● SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz
● VOLTAGE FEEDFORWARD
● ZERO LOAD CURRENT OPERATION
● INTERNAL CURRENT LIMITING (PULSE- BYPULSE AND HICCUP MODE)
● INHIBIT FOR ZERO CURRENT CONSUMPTION
● PROTECTION AGAINST FEEDBACK DISCONNECTION
● THERMAL SHUTDOWN
● SOFT START FUNCTION 2
DESCRIPTION
Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25Ω) to obtain very high Figure 1. Packages DIP-8 Table 1. Order Codes Part Number L4978 L4978D L4978D013TR SO16W Package DIP-8 SO16 SO16 in Tape & Reel efficency and high switching speed. A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed). A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V cover the majority of today’s applications.
