Datasheet Linear Technology LTC3860

Manufacturer	Linear Technology
Series	LTC3860

Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Current Sharing

Datasheets

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PDF, 451 Kb, Language: en, File uploaded: Sep 24, 2017, Pages: 36
Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Current Sharing

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Packaging

	LTC3860EUH#PBF	LTC3860EUH#TRPBF	LTC3860IUH#PBF	LTC3860IUH#TRPBF
N	1	2	3	4
Package	5x5 QFN-32 Package Outline Drawing	5x5 QFN-32 Package Outline Drawing	5x5 QFN-32 Package Outline Drawing	5x5 QFN-32 Package Outline Drawing
Package Code	UH	UH	UH	UH
Package Index	05-08-1693	05-08-1693	05-08-1693	05-08-1693
Pin Count	32	32	32	32

Parametrics

Parameters / Models	LTC3860EUH#PBF	LTC3860EUH#TRPBF	LTC3860IUH#PBF	LTC3860IUH#TRPBF
Architecture	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode	Constant Frequency Voltage Mode
Demo Boards	DC1184A,DC1755A	DC1184A,DC1755A	DC1184A,DC1755A	DC1184A,DC1755A
Design Tools	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File
Export Control	no	no	no	no
Features	Differential Remote Sense, PolyPhase, Resistor Set Frequency, External Synchronization, PLL, DCR Current Sense, Power Good, Tracking	Differential Remote Sense, PolyPhase, Resistor Set Frequency, External Synchronization, PLL, DCR Current Sense, Power Good, Tracking	Differential Remote Sense, PolyPhase, Resistor Set Frequency, External Synchronization, PLL, DCR Current Sense, Power Good, Tracking	Differential Remote Sense, PolyPhase, Resistor Set Frequency, External Synchronization, PLL, DCR Current Sense, Power Good, Tracking
Frequency, kHz	1250	1250	1250	1250
Frequency Adjust Range	250kHz - 1.25MHz	250kHz - 1.25MHz	250kHz - 1.25MHz	250kHz - 1.25MHz
Frequency Sync Range	250kHz - 1.25MHz	250kHz - 1.25MHz	250kHz - 1.25MHz	250kHz - 1.25MHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	50	50	50	50
Isupply, mA	14	14	14	14
Max Phases	2, 3, 4, 6, 12	2, 3, 4, 6, 12	2, 3, 4, 6, 12	2, 3, 4, 6, 12
Monolithic	no	no	no	no
Number of Outputs	2	2	2	2
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Output Current, A	40	40	40	40
Output Current 2, A	40	40	40	40
Polyphase	yes	yes	yes	yes
Sense Resistor	Rsense, DCR	Rsense, DCR	Rsense, DCR	Rsense, DCR
Switch Current, A	40	40	40	40
Switch Current 2, A	40	40	40	40
Synchronous	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck
Topology 1	Buck	Buck	Buck	Buck
Topology 2	Buck	Buck	Buck	Buck
Vin Max, V	24	24	24	24
Vin Min, V	3	3	3	3
Vout Max, V	5	5	5	5
Vout Maximum	Vcc-0.5V	Vcc-0.5V	Vcc-0.5V	Vcc-0.5V
Vout Min, V	0.6	0.6	0.6	0.6
Vout Min 2, V	0.6	0.6	0.6	0.6
Vref Accuracy Over Temp, %	1	1	1	1

Eco Plan

	LTC3860EUH#PBF	LTC3860EUH#TRPBF	LTC3860IUH#PBF	LTC3860IUH#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Articles

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Power Supply Works with FET Drivers, DrMOS and Power Blocks for Flexible Placement Near Microprocessors &mdash LT Journal
PDF, 1.3 Mb, File published: Jul 15, 2011
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Power Supply Works with FET Drivers, DrMOS and Power
Blocks for Flexible Placement Near Microprocessors
Theo Phillips As microprocessors demand progressively more current at lower voltages, it becomes
important to minimize conduction losses by placing the power supply as close to
the load as possible. This increases the value of every square millimeter of board
space near the loadвЂ”particularly when multiple power stages are used. It is also
important to locate the DC/DC controller away from high current paths, which can
be difficult when the MOSFET gate drivers are in the controller package, because the
gate traces must also be kept short. Sometimes the best solution is to use external
power train devices or discrete N-channel MOSFETs and associated gate drivers.
The LTC3860 is a dual output step-down
DC/DC controller designed to work in
conjunction with drivers or power train
devices such as DrMOS and power blocks,
enabling flexible design configurations
with PolyPhaseВ® operation. Up to 12
stages can be paralleled to increase output
current and clocked out of phase to minimize input and output filtering (FigureВ 1).
In PolyPhase configurations, both output voltage (VOUT) and ground terminals
are monitored using a single differential
amplifier, enabling tight regulation even
where IR losses occur through vias, trace
runs and interconnects. Regulation is …

Model Line

Series: LTC3860 (4)

LTC3860EUH#PBF LTC3860EUH#TRPBF LTC3860IUH#PBF LTC3860IUH#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | External Power Switch Buck Controllers