LT3667EUDD#PBF

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Analog Devices Inc./Maxim Integrated

40V 400MA STEP-DOWN SWITCHING REGULATOR WITH DUAL FAULT PROTECTED LDOS

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LT3667EUDD#PBF

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Analog Devices Inc./Maxim Integrated

40V 400MA STEP-DOWN SWITCHING REGULATOR WITH DUAL FAULT PROTECTED LDOS

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT3667 Series

The LT3667 is a monolithic triple power supply composed of a 400mA buck switching regulator and two 200mA low dropout linear regulators (LDOs).The buck regulator includes a high efficiency switch, a boost diode, and the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application.Each LDO supplies 200mA of output current with a typical dropout voltage of 340mV, and each LDO has an accurate resistor programmable current limit.Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting and reverse current protection.The LT3667 is available in a thermally-enhanced 16-Lead MSOP and a 24-Pin 3mm x 5mm QFN package with exposed pad for low thermal resistance.ApplicationsAutomotive Battery RegulationPower for Portable InstrumentationIndustrial SuppliesFault-Protected Sensor Supply

Technical Specifications

Parameters and characteristics for this part

Specification	LT3667EUDD#PBF

Current - Output 1	400 mA
Current - Output 2	200 mA
Current (Output 3)	200 mA
Frequency - Switching (Max)	2.2 MHz
Frequency - Switching (Min)	243 kHz
Mounting Type	Surface Mount
Number of Outputs	3
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Package / Case	24-WFQFN Exposed Pad
Package Length	3 mm
Package Name	24-QFN
Package Width	5 mm
Topology	Linear (LDO) (2), Step-Down (Buck) (1)
Voltage - Output 1 (Max)	38.6 V
Voltage - Output 1 (Min)	1.2 V
Voltage - Output 2 (Maximum)	38.6 V
Voltage - Output 2 (Minimum)	0.8 V
Voltage - Supply (Maximum)	45 V
Voltage - Supply (Minimum)	1.6 V
Voltage (Output 3) (Max)	38.6 V
Voltage (Output 3) (Min)	0.8 V
w/LED Driver	No
w/Sequencer	No
w/Supervisor	No

LT3667 Series

Part	Number of Outputs	Package / Case	Voltage (Output 3) (Max)	Voltage (Output 3) (Min)	Current (Output 3)	Voltage - Output 2 (Maximum)	Voltage - Output 2 (Minimum)	Current - Output 2	Frequency - Switching (Min)	Frequency - Switching (Max)	w/Supervisor	Package Length	Package Name	Package Width	Mounting Type	Topology	Voltage - Supply (Minimum)	Voltage - Supply (Maximum)	Voltage - Output 1 (Min)	Voltage - Output 1 (Max)	Current - Output 1	w/Sequencer	Operating Temperature (Max)	Operating Temperature (Min)	w/LED Driver	Package Features
Analog Devices Inc./Maxim Integrated LT3667IUDD#TRPBF	3	24-WFQFN Exposed Pad	38.6 V	0.8 V	200 mA	38.6 V	0.8 V	200 mA	243 kHz	2.2 MHz	No	3 mm	24-QFN	5 mm	Surface Mount	Linear (LDO) (2) Step-Down (Buck) (1)	1.6 V	45 V	1.2 V	38.6 V	400 mA	No	125 °C	-40 °C	No
Analog Devices Inc./Maxim Integrated LT3667IMSE#TRPBF	3		38.6 V	0.8 V	200 mA	38.6 V	0.8 V	200 mA	243 kHz	2.2 MHz	No	0.118 in	16-MSOP-EP 16-TFSOP	3 mm	Surface Mount	Linear (LDO) (2) Step-Down (Buck) (1)	1.6 V	45 V	1.2 V	38.6 V	400 mA	No	125 °C	-40 °C	No	Exposed Pad
Analog Devices Inc./Maxim Integrated LT3667EMSE#PBF	3		38.6 V	0.8 V	200 mA	38.6 V	0.8 V	200 mA	243 kHz	2.2 MHz	No	0.118 in	16-MSOP-EP 16-TFSOP	3 mm	Surface Mount	Linear (LDO) (2) Step-Down (Buck) (1)	1.6 V	45 V	1.2 V	38.6 V	400 mA	No	125 °C	-40 °C	No	Exposed Pad
Analog Devices Inc./Maxim Integrated LT3667HMSE#PBF	3		38.6 V	0.8 V	200 mA	38.6 V	0.8 V	200 mA	243 kHz	2.2 MHz	No	0.118 in	16-MSOP-EP 16-TFSOP	3 mm	Surface Mount	Linear (LDO) (2) Step-Down (Buck) (1)	1.6 V	45 V	1.2 V	38.6 V	400 mA	No	150 °C	-40 °C	No	Exposed Pad
Analog Devices Inc./Maxim Integrated LT3667IMSE#PBF	3		38.6 V	0.8 V	200 mA	38.6 V	0.8 V	200 mA	243 kHz	2.2 MHz	No	0.118 in	16-MSOP-EP 16-TFSOP	3 mm	Surface Mount	Linear (LDO) (2) Step-Down (Buck) (1)	1.6 V	45 V	1.2 V	38.6 V	400 mA	No	125 °C	-40 °C	No	Exposed Pad
Analog Devices Inc./Maxim Integrated LT3667HUDD#PBF	3	24-WFQFN Exposed Pad	38.6 V	0.8 V	200 mA	38.6 V	0.8 V	200 mA	243 kHz	2.2 MHz	No	3 mm	24-QFN	5 mm	Surface Mount	Linear (LDO) (2) Step-Down (Buck) (1)	1.6 V	45 V	1.2 V	38.6 V	400 mA	No	150 °C	-40 °C	No
Analog Devices Inc./Maxim Integrated LT3667EUDD#TRPBF	3	24-WFQFN Exposed Pad	38.6 V	0.8 V	200 mA	38.6 V	0.8 V	200 mA	243 kHz	2.2 MHz	No	3 mm	24-QFN	5 mm	Surface Mount	Linear (LDO) (2) Step-Down (Buck) (1)	1.6 V	45 V	1.2 V	38.6 V	400 mA	No	125 °C	-40 °C	No
Analog Devices Inc./Maxim Integrated LT3667HUDD#TRPBF	3	24-WFQFN Exposed Pad	38.6 V	0.8 V	200 mA	38.6 V	0.8 V	200 mA	243 kHz	2.2 MHz	No	3 mm	24-QFN	5 mm	Surface Mount	Linear (LDO) (2) Step-Down (Buck) (1)	1.6 V	45 V	1.2 V	38.6 V	400 mA	No	150 °C	-40 °C	No
Analog Devices Inc./Maxim Integrated LT3667EMSE#TRPBF	3		38.6 V	0.8 V	200 mA	38.6 V	0.8 V	200 mA	243 kHz	2.2 MHz	No	0.118 in	16-MSOP-EP 16-TFSOP	3 mm	Surface Mount	Linear (LDO) (2) Step-Down (Buck) (1)	1.6 V	45 V	1.2 V	38.6 V	400 mA	No	125 °C	-40 °C	No	Exposed Pad
Analog Devices Inc./Maxim Integrated LT3667EMSE#PBF	3		38.6 V	0.8 V	200 mA	38.6 V	0.8 V	200 mA	243 kHz	2.2 MHz	No	0.118 in	16-MSOP-EP 16-TFSOP	3 mm	Surface Mount	Linear (LDO) (2) Step-Down (Buck) (1)	1.6 V	45 V	1.2 V	38.6 V	400 mA	No	125 °C	-40 °C	No	Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LT3667EUDD#PBF | Datasheet

R530 Reliability Data