LTC3890HUH-2#PBF

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Analog Devices

60V LOW IQ, DUAL, 2-PHASE SYNCHRONOUS STEP-DOWN DC/DC CONTROLLER

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LTC3890HUH-2#PBF

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Analog Devices

60V LOW IQ, DUAL, 2-PHASE SYNCHRONOUS STEP-DOWN DC/DC CONTROLLER

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DocumentsDatasheet R526 Reliability Data

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Technical Specifications

Parameters and characteristics for this part

Specification	LTC3890HUH-2#PBF

Clock Sync	False
Control Features	Phase Control, Tracking, Frequency Control, Soft Start, Enable, Power Good
Duty Cycle (Max) [Max]	99 %
Frequency - Switching [Max]	535 kHz, 835 kHz
Frequency - Switching [Min]	350 kHz, 105 kHz
Function	Step-Up/Step-Down, Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	2
Output Type	Transistor Driver
Supplier Device Package	32-QFN (5x5)
Synchronous Rectifier	True
Topology	SEPIC, Buck
Voltage - Supply (Vcc/Vdd) [Max]	60 V
Voltage - Supply (Vcc/Vdd) [Min]	4 V

LTC3890-1 Series

60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

Part	Number of Outputs	Duty Cycle (Max) [Max]	Control Features	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Topology	Output Configuration	Output Type	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Frequency - Switching [Max]	Frequency - Switching [Min]	Output Phases	Function	Mounting Type	Package / Case
Analog Devices LTC3890HUH-2#PBF	2	99 %	Enable Frequency Control Phase Control Power Good Soft Start Tracking	150 °C	-40 °C	32-QFN (5x5)	Buck SEPIC	Positive	Transistor Driver	60 V	4 V	535 kHz 835 kHz	105 kHz 350 kHz	2	Step-Down Step-Up/Step-Down	Surface Mount
Analog Devices LTC3890HGN-1#TRPBF	2	99 %	Enable Frequency Control Power Good Soft Start Tracking	150 °C	-40 °C	28-SSOP	Buck	Positive	Transistor Driver	60 V	4 V	535 kHz 835 kHz	105 kHz 350 kHz	2	Step-Down	Surface Mount	28-SSOP
Analog Devices LTC3890EGN-3#TRPBF	2	99 %	Enable Frequency Control Power Good Soft Start Tracking	125 ¯C	-40 °C	28-SSOP	Buck SEPIC	Positive	Transistor Driver	60 V	4 V	535 kHz 835 kHz	105 kHz 350 kHz	2	Step-Down Step-Up/Step-Down	Surface Mount	28-SSOP
Analog Devices LTC3890MPUH#TRPBF	2	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start Tracking	150 °C	-55 °C	32-QFN (5x5)	Buck	Positive	Transistor Driver	60 V	4 V	535 kHz 835 kHz	105 kHz 350 kHz	2	Step-Down	Surface Mount
Analog Devices LTC3890MPGN-1#TRPBF	2	99 %	Enable Frequency Control Power Good Soft Start Tracking	150 °C	-55 °C	28-SSOP	Buck	Positive	Transistor Driver	60 V	4 V	535 kHz 835 kHz	105 kHz 350 kHz	2	Step-Down	Surface Mount	28-SSOP
Analog Devices LTC3890HUH#TRPBF	2	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start Tracking	150 °C	-40 °C	32-QFN (5x5)	Buck	Positive	Transistor Driver	60 V	4 V	535 kHz 835 kHz	105 kHz 350 kHz	2	Step-Down	Surface Mount
Analog Devices LTC3890EUH-2#PBF	2	99 %	Enable Frequency Control Phase Control Power Good Soft Start Tracking	125 ¯C	-40 °C	32-QFN (5x5)	Buck SEPIC	Positive	Transistor Driver	60 V	4 V	535 kHz 835 kHz	105 kHz 350 kHz	2	Step-Down Step-Up/Step-Down	Surface Mount
Analog Devices LTC3890MPUH#PBF	2	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start Tracking	150 °C	-55 °C	32-QFN (5x5)	Buck	Positive	Transistor Driver	60 V	4 V	535 kHz 835 kHz	105 kHz 350 kHz	2	Step-Down	Surface Mount
Analog Devices LTC3890EUH#TRPBF	2	99 %	Current Limit Enable Frequency Control Phase Control Power Good Soft Start Tracking	125 ¯C	-40 °C	32-QFN (5x5)	Buck	Positive	Transistor Driver	60 V	4 V	535 kHz 835 kHz	105 kHz 350 kHz	2	Step-Down	Surface Mount
Analog Devices LTC3890HGN-1#PBF	2	99 %	Enable Frequency Control Power Good Soft Start Tracking	150 °C	-40 °C	28-SSOP	Buck	Positive	Transistor Driver	60 V	4 V	535 kHz 835 kHz	105 kHz 350 kHz	2	Step-Down	Surface Mount	28-SSOP

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	73	$ 9.70

Description

General part information

LTC3890-1 Series

The LTC3890 is a high performance dual step-down switching regulator DC/DC controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. Power loss and noise due to the ESR of the input capacitor are minimized by operating the two controller output stages out-of-phase.The 50μA no-load quiescent current extends operating run time in battery-powered systems. OPTI-LOOP®compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3890 features a precision 0.8V reference and power good output indicators. A wide 4V to 60V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries.Independent TRACK/SS pins for each controller ramp the output voltages during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The PLLIN/MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous conduction mode at light loads. For a leaded package version (28-lead Narrow SSOP), see the LTC3890-1 data sheet.LTC3890LTC3890-1LTC3890-2LTC3890-3Adjustable Current LimitLimitYesNoYesNoCLKOUT/PHASMD forMultiphase OperationYesNoYesNoNumber of PGoodOutputs2121OVP – Bottom GateCrowbarYesYesNoNoCurrent Limit FoldbackYesYesNoNoLight Load Operationwhen Synced to ExternalClockForced ContinuousForced ContinuousPulse SkippingPulse SkippingSENSE Pins CommonMode RangeCommon Mode < 0.5VRequires VFB < 0.65VCommon Mode < 0.5VRequires VFB < 0.65VNot Dependant onVFB. Easy to make anon-synchronousBoost or SEPICNot Dependant onVFB. Easy to make anon-synchronousBoost or SEPICPackage5 × 5 QFN-32SSOP-285 × 5 QFN-32SSOP-28ApplicationsAutomotive Always-On SystemsBattery Operated Digital DevicesDistributed DC Power Systems