LM2770SDX-12157/NOPB

Voltage - Output (Min/Fixed):	1.2V, 1.58V
Base Part Number:	LM2770
Supplier Device Package:	10-SON (3x3)
Package / Case:	10-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-30°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	700kHz
Current - Output:	250mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Programmable
Topology:	Charge Pump
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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。LM2770SDX-12157/NOPB is an integrated in-vehicle DC/DC switching regulator composed of a MOSFET, a DC/DC controller IC, and a reference voltage regulator circuit. It offers excellent low voltage dropout, low rDS(on), and low quiescent current operation. Its stability and efficiency are improved by the built-in integrated circuit temperature compensation, applied as temperature open loop gain and temperature pulsewidth modulation. This device is designed to meet the requirements of automotive electronics, including infotainment systems, powertrains, lighting control, navigation systems and automotive navigation systems.Application FieldThe LM2770SDX-12157/NOPB regulator is designed for the automotive environment, being able to provide an input voltage range from 4.5V to 18V and an output current of up to 15A (at ambient temperature). It provides short-circuit protection and over-temperature protection of the MOSFET switch and a wide voltage ranging feature and a variable frequency range. It is designed to operate with a switching frequency range up to 1.2 MHz, and offers a low switching frequency of 300 kHz. This device can be used in automotive applications including infotainment systems, powertrains, lighting control, navigation systems and automotive navigation systems.Working PrincipleThe LM2770SDX-12157/NOPB regulator works by monitoring the output voltage through the voltage reference in order to control the MOSFET switch, which is in series with the input voltage, and the output voltage. When the output voltage exceeds or drops below the reference voltage, the regulator will switch the MOSFET off or on, respectively, in order to keep the output voltage at setpoint. The regulator also uses an integrated temperature compensation circuit in order to regulate the switching frequency and the output voltage according to the ambient temperature.The LM2770SDX-12157/NOPB offers excellent power supply stabilization, with extremely low voltage dropout, low quiescent current, and improved stability. Its wide input voltage range and high efficiency allows it to be used in a wide range of automotive applications. With protection circuits against short circuits, over-temperature protected MOSFET switch, and wide voltage ranging feature, it is an ideal choice for automotive systems.ConclusionThe LM2770SDX-12157/NOPB integrated in-vehicle DC/DC switching regulator is designed to meet the requirements of automotive electronics. It offers excellent low voltage dropout, low quiescent current, and low rDS(on) operation. Moreover, its stability and efficiency are improved by the built-in integrated circuit temperature compensation, applied as temperature open loop gain and temperature pulsewidth modulation. The LM2770SDX-12157/NOPB is suitable for applications including infotainment systems, powertrains, lighting control, navigation systems and automotive navigation systems, as a result of its wide input voltage range and high efficiency.

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