Datasheet Linear Technology LTC3569EUD#PBF — Datenblatt

Hersteller	Linear Technology
Serie	LTC3569
Artikelnummer	LTC3569EUD#PBF

Triple Buck Regulator mit 1,2 A und zwei 600 mA Ausgängen und einzelnen programmierbaren Referenzen

Datenblätter

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PDF, 399 Kb, Sprache: en, Datei hochgeladen: Sep 22, 2017, Seiten: 26
Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References

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Preise

Verpackung

Package	3x3 QFN-20
Package Code	UD
Package Index	05-08-1720

Parameter

Architecture	Constant Frequency Current Mode
Demo Boards	DC1340A
Design Tools	LTspice File
Export Control	no
Features	Burst Mode, Resistor Set Frequency, External Synchronization, Power Good, 100% Duty Cycle
Frequency	2250 kHz
Frequency Adjust Range	1MHz - 3MHz
Frequency Sync Range	1.2MHz - 3MHz
Integrated Inductor	no
Ishutdown	0.1 µA
Isupply	0.022 mA
Max Phases	1
Monolithic	yes
Number of Outputs	3
Operating Temperature Range	0 to 85 °C
Output Current	1.2 A
Output Current 2	0.6 A
Output Current 3	0.6 A
Polyphase	no
Switch Current	2 A
Switch Current 2	1 A
Switch Current 3	1 A
Synchronous	yes
Topology	Buck
Topology 1	Buck
Topology 2	Buck
Topology 3	Buck
Vin Max	5.5 V
Vin Min	2.5 V
Vout Max	5.5 V
Vout Max 2	5.5 V
Vout Max 3	5.5 V
Vout Maximum	Vin
Vout Min	0.425 V
Vout Min 2	0.425 V
Vout Min 3	0.425 V
Vref Accuracy Over Temp	2 %

Öko-Plan

RoHS

Compliant

Konstruktionshinweise

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Triple Buck Regulator Features 1-Wire Dynamically Programmable Output Voltages &mdash DN459
PDF, 112 Kb, Datei veröffentlicht: Jan 20, 2009
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Triple Buck Regulator Features 1-Wire Dynamically
Programmable Output Voltages
Design Note 459
Andy Bishop
Introduction
The LTC В®3569 is a compact power solution for handheld
devices. Its tiny 3mm Г— 3mm QFN package includes
three buck regulators with individually programmable
output voltages. One regulator supports load currents
up to 1200mA, while the other two support currents to
600mA. Two regulators can be paralleled for increased
load capability. Each current-mode regulator is internally
compensated with excellent load and line regulation. A
complete 2-or 3-output solution requires a minimum
number of external passive components.
Three Individually Programmable Bucks
The LTC3569вЂ™s three output voltages are independently
programmed by simply toggling their respective enable
pins. Each time an enable pin sees a falling edge, a 4-bit
counter is decremented. After a time-out delay of 120Ојs
from the last rising edge at the enable pins, the counter
state is latched into the feedback reference voltage DAC.
In this way, the reference voltage can be programmed …

Modellreihe

Serie: LTC3569 (12)

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Herstellerklassifikation

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

Andere Namen:

LTC3569EUDPBF, LTC3569EUD PBF