Datasheet Linear Technology LTC3773EUHF#PBF

Manufacturer	Linear Technology
Series	LTC3773
Part Number	LTC3773EUHF#PBF

Triple Output Synchronous 3-Phase DC/DC Controller with Up/Down Tracking

Datasheets

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PDF, 485 Kb, Language: en, File uploaded: Sep 23, 2017, Pages: 32
Triple Output Synchronous 3-Phase DC/DC Controller with Up/Down Tracking

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Packaging

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

Parametrics

Architecture	Constant Frequency Current Mode
Demo Boards	DC908A,DC913A
Design Tools	LTspice Model
Export Control	no
Features	Tracking, PolyPhase, Power Good, Selectable Switching Frequency, External Synchronization, Burst Mode
Frequency	700 kHz
Frequency Adjust Range	220kHz, 400kHz, 560kHz
Frequency Sync Range	160kHz - 700kHz
Integrated Inductor	no
Ishutdown	20 µA
Isupply	2.8 mA
Max Phases	3
Monolithic	no
Number of Outputs	3
Operating Temperature Range	0 to 85 °C
Output Current	25 A
Output Current 2	25 A
Output Current 3	25 A
Polyphase	yes
Sense Resistor	Rsense
Switch Current	25 A
Switch Current 2	25 A
Switch Current 3	25 A
Synchronous	yes
Topology	Buck
Topology 1	Buck
Topology 2	Buck
Topology 3	Buck
Vin Max	36 V
Vin Min	3.3 V
Vout Max	5 V
Vout Max 2	5 V
Vout Max 3	5 V
Vout Maximum	0.99Vin
Vout Min	0.6 V
Vout Min 2	0.6 V
Vout Min 3	0.6 V
Vref Accuracy Over Temp	1.5 %

Eco Plan

RoHS

Compliant

Design Notes

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Triple Output 3-Phase Controller Saves Space and Improves Performance in High Density Power Converters &mdash DN409
PDF, 94 Kb, File published: Jan 29, 2007
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advertisement Triple Output 3-Phase Controller Saves Space and Improves
Performance in High Density Power Converters
Design Note 409
Mike Shriver
TodayвЂ™s telecommunications, server and network applications require power from a multitude of voltage
rails. Having more than ten rails ranging from 5V to 1V
or less is common. These boards are typically crowded
with heat-producing FPGAs or microprocessors, thus
demanding power converters that are both compact and
highly efп¬Ѓcient. Furthermore, the converters may need
to meet other requirements such as a fast load step
response and rail tracking. 220kHz, 400kHz or 560kHz, or it can be synchronized
to an external clock between 160kHz and 700kHz. The
controller can step down from input voltages as high as
36V and the output voltage can be programmed from
0.6V to 5V.
Figure 1 shows a high density triple output DC/DC converter with each output delivering up to 5A using the
LTC3773 controller. Figure 2 shows the efп¬Ѓciency of each
output versus load current; where up to 93% efп¬Ѓciency is
achieved. Reductions in space are realized by the use of
dual channel FETs and a switching frequency of 400kHz
which permits the use of 7mm Г— 7mm ferrite inductors. The LTCВ® 3773 switching regulator meets and even goes
beyond the above requirements. This device is a 3-phase, …

Model Line

Series: LTC3773 (4)

LTC3773EG#PBF LTC3773EG#TRPBF LTC3773EUHF#PBF LTC3773EUHF#TRPBF

Manufacturer's Classification

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

Other Names:

LTC3773EUHFPBF, LTC3773EUHF PBF