(China (Mainland))
Product Summary
The L4978D is a high-performance 2A STEP DOWN SWITCHING REGULATOR.
Parametrics
L4978D Parametrics:
Packaging
Tube
Type
Step-Down (Buck)
Output Type
Adjustable
Number of Outputs
1
Voltage - Output
3.3 V ~ 50 V
Voltage - Input
8 V ~ 55 V
PWM Type
-
Frequency - Switching
100kHz ~ 300kHz
Current - Output
2A
Synchronous Rectifier
No
Operating Temperature
-40°C ~ 150°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.295", 7.50mm Width)
Supplier Device Package
16-SO W
Other Names
497-5794-5
Features
L4978D 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 (PULSEBYPULSE AND HICCUP MODE)
■ INHIBIT FOR ZERO CURRENT CONSUMPTION
■ PROTECTION AGAINST FEEDBACK DISCONNECTION
■ THERMAL SHUTDOWN
■ SOFT START FUNCTION
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 L4978D |
STMicroelectronics |
Switching Converters, Regulators & Controllers 3.3 to 50V Step-Down |
Data Sheet |
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L4978D013TR |
STMicroelectronics |
Switching Converters, Regulators & Controllers 3.3 to 50V Step-Down |
Data Sheet |
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