LT8619LT8619-5 Series

60V, 1.2A Synchronous Monolithic Buck Regulator with 6μA Quiescent Current

Catalog

60V, 1.2A Synchronous Monolithic Buck Regulator with 6μA Quiescent Current

Part	Operating Temperature [Min]	Operating Temperature [Max]	Output Configuration	Voltage - Output (Max) [Max]	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Supplier Device Package	Topology	Current - Output	Frequency - Switching [Min]	Frequency - Switching [Max]	Function	Package / Case	Output Type	Number of Outputs	Mounting Type	Voltage - Input (Max) [Max]	Output Type	Package / Case
Analog Devices LT8619IDD#TRPBF	-40 °C	125 ¯C	Positive	59.4 V	3 V	0.8 V	10-DFN (3x3)	Buck	1.2 A	300 kHz	2.2 MHz	Step-Down	10-WFDFN Exposed Pad	Adjustable	1	Surface Mount	60 V
Analog Devices LT8619EDD#TRPBF	0 °C	125 ¯C	Positive	59.4 V	3 V	0.8 V	10-DFN (3x3)	Buck	1.2 A	300 kHz	2.2 MHz	Step-Down	10-WFDFN Exposed Pad	Adjustable	1	Surface Mount	60 V
Analog Devices LT8619EMSE-5#PBF	0 °C	125 ¯C	Positive		3 V	5 V	16-MSOP-EP	Buck	1.2 A	300 kHz	2.2 MHz	Step-Down	16-TFSOP Exposed Pad		1	Surface Mount	60 V	1.81 mOhm	0.118 in 3 mm
Analog Devices LT8619EMSE#PBF	0 °C	125 ¯C	Positive	59.4 V	3 V	0.8 V	16-MSOP-EP	Buck	1.2 A	300 kHz	2.2 MHz	Step-Down	16-TFSOP Exposed Pad	Adjustable	1	Surface Mount	60 V		0.118 in 3 mm

Catalog

60V, 1.2A Synchronous Monolithic Buck Regulator with 6μA Quiescent Current

Key Features

• Wide Input Voltage Range: 3V to 60V

• Fast Minimum Switch-On Time: 30ns

• Ultralow Quiescent Current Burst Mode Operation:6μA IQRegulating 12VINto 3.3VOUT10mVP-POutput Ripple at No Load

• 6μA IQRegulating 12VINto 3.3VOUT

• 10mVP-POutput Ripple at No Load

• Synchronizable/Programmable Fixed Frequency Forced Continuous Mode Operation: 300kHz to 2.2MHz

• Low Dropout: 360mV at 0.5A

• Low EMI

• High Efficiency Synchronous Operation:92% Efficiency at 0.5A, 5VOUTfrom 12VIN90% Efficiency at 0.5A, 3.3VOUTfrom 12VIN

• 92% Efficiency at 0.5A, 5VOUTfrom 12VIN

• 90% Efficiency at 0.5A, 3.3VOUTfrom 12VIN

• Accurate 1V Enable Pin Threshold

• Internal Soft-Start and Compensation

• Power Good Flag

• Small Thermally Enhanced 16-Lead MSOP Package and 10-Lead (3mm × 3mm) DFN Packages

• AEC-Q100 Qualified for Automotive Applications

Description

The LT8619 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 6μA of quiescent current. The LT8619 can deliver 1.2A of continuous current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode®operation enables high efficiency down to very low output currents while keeping the output ripple to 10mVP-P. A SYNC pin allows forced continuous mode operation synchronized to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VINundervoltage lockout or to shut down the LT8619, reducing the input supply current to below 0.6μA. The PG flag signals when VOUTis within ±7.5% of the programmed output voltage. The LT8619 is available in a small 16-lead MSOP and 10-lead 3mm × 3mm DFN packages with exposed pad for low thermal resistance.APPLICATIONS12V Automotive Systems12V and 24V Commercial Vehicles48V Electric and Hybrid VehiclesIndustrial Supplies