Datasheet Linear Technology LTC3733-1

Manufacturer	Linear Technology
Series	LTC3733-1

3-Phase, Buck Controllers for AMD CPUs

Datasheets

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PDF, 296 Kb, File uploaded: Sep 23, 2017

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Packaging

	LTC3733CUHF-1#PBF	LTC3733CUHF-1#TRPBF
N	1	2
Package	5x7 QFN-38 Package Outline Drawing	5x7 QFN-38 Package Outline Drawing
Package Code	UHF	UHF
Package Index	05-08-1701	05-08-1701
Pin Count	38	38

Parametrics

Parameters / Models	LTC3733CUHF-1#PBF	LTC3733CUHF-1#TRPBF
Demo Boards	DC648A	DC648A
Design Tools	LTspice Model	LTspice Model
Export Control	no	no
Features	VID, PolyPhase, Active Voltage Positioning, External Synchronization, Selectable Switching Frequency, Burst Mode, Power Good	VID, PolyPhase, Active Voltage Positioning, External Synchronization, Selectable Switching Frequency, Burst Mode, Power Good
Frequency, kHz	530	530
Frequency Adjust Range	210kHz, 350kHz, 530kHz	210kHz, 350kHz, 530kHz
Frequency Sync Range	210kHz - 530kHz	210kHz - 530kHz
Integrated Inductor	no	no
Ishutdown, µA	20	20
Isupply, mA	2.5	2.5
Max Phases	3	3
Monolithic	no	no
Number of Outputs	1	1
Operating Temperature Range, °C	0 to 70	0 to 70
Output Current, A	60	60
Polyphase	yes	yes
Switch Current, A	60	60
Synchronous	yes	yes
Topology	Buck	Buck
Vin Max, V	36	36
Vin Min, V	4	4
Vout Max, V	1.55	1.55
Vout Min, V	0.8	0.8

Eco Plan

	LTC3733CUHF-1#PBF	LTC3733CUHF-1#TRPBF
RoHS	Compliant	Compliant

Other Options

LTC3733

Design Notes

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3-Phase LTC3733 Provides High Performance Power Solutions for AMD Opteron and Athlon 64 Processors &mdash DN326
PDF, 90 Kb, File published: Nov 2, 2003
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advertisement High Performance Power Solutions for AMD Opteron
and Athlon 64 Processors вЂ“ Design Note 326
Henry J. Zhang and Wei Chen
Introduction
AMD Opteron and Athlon 64 CPUs can draw 65A at very
low voltages (0.8V to 1.55V). Such high currents put efп¬Ѓciency and related thermal issues at the top of a power
supply designerвЂ™s list of problems. The new LTC В®3733
PolyPhaseВ® synchronous buck controller solves these
problems, and others, by enabling solutions that offer
high efп¬Ѓciency, low proп¬Ѓle and fast transient response. inductor size. The LTC3733вЂ™s integrated MOSFET drivers
also simplify the design and minimize the overall supply
footprint. The LTC3733 directly senses the inductor
current of each phase to achieve excellent current
sharing among phases, thus evenly distributing the
thermal stress. As a result, overdesign of the MOSFETs
and inductors is unnecessary and the circuit can be
operated reliably without a heat sink. The total size and
cost of the solution is minimized. The LTC3733 is a 3-phase current mode controller that
drives three synchronous buck stages 120В° out of phase.
The three out-of-phase stages inherently self-cancel the
current ripple and thus minimize the size of the input
and output capacitors. Likewise, ripple cancellation
and a high switching frequency (up to 600kHz) make it …

Model Line

Series: LTC3733-1 (2)

LTC3733CUHF-1#PBF LTC3733CUHF-1#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Digitally Programmable Regulators