Datasheet Linear Technology LTC3733CUHF-1#PBF

Manufacturer	Linear Technology
Series	LTC3733-1
Part Number	LTC3733CUHF-1#PBF

3-Phase, Buck Controllers for AMD CPUs

Datasheets

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

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Prices

Packaging

Package	5x7 QFN-38
Package Code	UHF
Package Index	05-08-1701

Parametrics

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

Eco Plan

RoHS

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

Other Names:

LTC3733CUHF-1PBF, LTC3733CUHF-1 PBF, LTC3733CUHF1#PBF, LTC3733CUHF 1#PBF