Datasheet Linear Technology LTC3860IUH#PBF

Manufacturer	Linear Technology
Series	LTC3860
Part Number	LTC3860IUH#PBF

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

Package	5x5 QFN-32
Package Code	UH
Package Index	05-08-1693

Parametrics

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

Eco Plan

RoHS

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

Other Names:

LTC3860IUHPBF, LTC3860IUH PBF