LT8650SP Series

Dual Channel 6A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2μA Quiescent Current

Catalog

Dual Channel 6A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2μA Quiescent Current

Part	Output Configuration	Topology	Number of Outputs	Voltage - Input (Max) [Max]	Supplier Device Package	Function	Package / Case	Current - Output	Synchronous Rectifier	Output Type	Voltage - Input (Min) [Min]	Frequency - Switching [Max]	Frequency - Switching [Min]	Mounting Type	Voltage - Output (Min/Fixed)	Voltage - Output (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Qualification	Grade
Analog Devices LT8650SPJV#PBF	Positive	Buck	2	42 V	32-LQFN (6x4)	Step-Down	32-TFQFN Exposed Pad	6 A		Adjustable	2.6 V	3 MHz	300 kHz	Surface Mount	0.8 V	42 V	150 °C	-40 °C
Analog Devices LT8650SPJV#TRPBF	Positive	Buck	2	42 V	32-LQFN (6x4)	Step-Down	32-TFQFN Exposed Pad	6 A		Adjustable	2.6 V	3 MHz	300 kHz	Surface Mount	0.8 V	42 V	150 °C	-40 °C	AEC-Q100	Automotive

Catalog

Dual Channel 6A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2μA Quiescent Current

Key Features

• Silent Switcher®2 Architecture:Ultralow EMI on Any PCBEliminates PCB Layout SensitivityInternal Bypass Capacitors Reduce Radiated EMIOptional Spread Spectrum ModulationExposed Die Package for Heat Sink Mount

• Ultralow EMI on Any PCB

• Eliminates PCB Layout Sensitivity

• Internal Bypass Capacitors Reduce Radiated EMI

• Optional Spread Spectrum Modulation

• Exposed Die Package for Heat Sink Mount

• 6A DC from Each Channel Simultaneously

• Up to 8A on Either Channel

• Ultralow Quiescent Current Burst Mode®Operation:6.2μA IQRegulating 12VINto 5VOUT1and 3.3VOUT2Output Ripple <10mVP-P

• 6.2μA IQRegulating 12VINto 5VOUT1and 3.3VOUT2

• Output Ripple <10mVP-P

• Optional External VC Pin: Fast Transient Response and Current Sharing (Extra 50μA IQ/Channel)

• Forced Continuous Mode

• High Efficiency at High Frequency

• 94.6% Efficiency at 2A, 5VOUTfrom 12VINat 2MHz

• 93.3% Efficiency at 4A, 5VOUTfrom 12VINat 2MHz

• Fast Minimum Switch-On Time: 40ns

• Wide Input Voltage Range: 3.0V to 42V

• Adjustable and Synchronizable: 300kHz to 3MHz

• 4mm × 6mm 32-Lead LQFN Exposed Back Package

• AEC-Q100 Qualified for Automotive Applications

Description

The LT8650SP is a dual step-down regulator that delivers up to 6A of continuous current from both channels with a heat sink and supports loads up to 8A from each channel. The LT8650SP features second generation Silent Switcher architecture to minimize EMI emissions while delivering high efficiency at high switching frequencies. This includes integration of bypass capacitors to optimize high frequency current loops and make it easy to achieve advertised EMI performance by eliminating layout sensitivity. The top of the package features exposed die for heat sink attach which is required to meet maximum output current ratings.The fast, clean, low-overshoot switching edges enable high efficiency operation even at high switching frequencies, leading to a small overall solution size. Peak current mode control with a 40ns minimum on-time allows high step down ratios at high switching frequencies.Burst Mode operation features a 6.2μA quiescent current resulting in high efficiency at low output currents, forced continuous mode allows fixed switching frequency operation over the entire output load range, and spread spectrum operation can further reduce EMI emissions. External VC pins allow optimal loop compensation for fast transient response. The VC pins can also be used for current sharing and the CLKOUT pin enables synchronizing two LT8650SP chips to generate a 4-phase, 24A supply.APPLICATIONSGeneral Purpose Step-DownAutomotive and Industrial SuppliesProtected by U.S. patents, including 8823345.