LTC2960 - 36V Nano-Current Two Input Voltage Monitor

LTC2974 - 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement

LTC3864 - 60V Low IQ Step-Down DC/DC Controller with 100% Duty Cycle Capability

Features

Wide Operating V_IN Range: 3.5V to 60V
Wide V_OUT Range: 0.8V to V_IN
Low Operating I_Q = 40µA
Very Low Dropout Operation: 100% Duty Cycle
Strong High Voltage MOSFET Gate Driver
Constant Frequency Current Mode Architecture
Verified FMEA for Adjacent Pin Open/Short
Selectable High Efficiency Burst Mode® Operation or Pulse-Skipping Mode at Light Loads
Programmable Fixed Frequency: 50kHz to 850kHz
Phase-Lockable Frequency: 75kHz to 750kHz
Accurate Current Limit
Programmable Soft-Start or Voltage Tracking
Internal Soft-Start Guarantees Smooth Start-Up
Power Good Output Voltage Monitor
Low Shutdown I_Q = 7µA
Available in Small 12-Pin Thermally Enhanced MSOP and DFN Packages

Typical Application

Description

The LTC3864 is a robust, high voltage step-down DC/DC controller optimized for automotive and industrial applications. It drives a P-channel power MOSFET switch allowing 100% duty cycle operation. The wide input and output voltage ranges cover a multitude of applications. This device has been verified with the failure mode and effects analysis (FMEA) procedure for operation during failure conditions.

The LTC3864 offers excellent light load efficiency, drawing only 40µA quiescent current in a user programmable Burst Mode operation. Its peak current mode, constant frequency PWM architecture provides for good control of switching frequency and output current limit. The switching frequency can be programmed from 50kHz to 850kHz with an external resistor and can be synchronized to an external clock from 75kHz to 750kHz.

The LTC3864 offers programmable soft-start or output tracking. Safety features include overvoltage protection, overcurrent and short-circuit protection including frequency foldback and a power good output signal.

The LTC3864 is available in thermally enhanced 12-Pin MSOP and 3mm × 4mm DFN packages.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

DFN-12, MS-12

Order Info

Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)^*	RoHS Data
LTC3864EDE#PBF	DFN	12	E	$2.94	$2.06	View
LTC3864EDE#TRPBF	DFN	12	E		$2.12	View
LTC3864EMSE#PBF	MSOP	12	E	$2.94	$2.06	View
LTC3864EMSE#TRPBF	MSOP	12	E		$2.12	View
LTC3864HDE#PBF	DFN	12	H	$3.90	$2.73	View
LTC3864HDE#TRPBF	DFN	12	H		$2.79	View
LTC3864HMSE#PBF	MSOP	12	H	$3.90	$2.73	View
LTC3864HMSE#TRPBF	MSOP	12	H		$2.79	View
LTC3864IDE#PBF	DFN	12	I	$3.49	$2.44	View
LTC3864IDE#TRPBF	DFN	12	I		$2.50	View
LTC3864IMSE#PBF	MSOP	12	I	$3.49	$2.44	View
LTC3864IMSE#TRPBF	MSOP	12	I		$2.50	View
LTC3864MPDE#PBF	DFN	12	MP	$9.40	$6.58	View
LTC3864MPDE#TRPBF	DFN	12	MP		$6.64	View
LTC3864MPMSE#PBF	MSOP	12	MP	$9.40	$6.58	View
LTC3864MPMSE#TRPBF	MSOP	12	MP		$6.64	View
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^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number	Description	Price	Documentation
DC1722A	LTC3864EMSE Demo Board \| 3.5V < VIN < 55V; VOUT =	Contact Factory	Design File Manual Schematic
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Applications

Industrial and Automotive Power Supplies
Telecom Power Supplies
Distributed Power Systems

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LTC3864

Technical Support

For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.