Datasheet Linear Technology LTC3569IUD#TRPBF

Manufacturer	Linear Technology
Series	LTC3569
Part Number	LTC3569IUD#TRPBF

Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References

Datasheets

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PDF, 399 Kb, Language: en, File uploaded: Sep 22, 2017, Pages: 26
Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References

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Packaging

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

Parametrics

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	-40 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 %

Eco Plan

RoHS

Compliant

Design Notes

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Triple Buck Regulator Features 1-Wire Dynamically Programmable Output Voltages &mdash DN459
PDF, 112 Kb, File published: 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 …

Model Line

Series: LTC3569 (12)

LTC3569EFE#PBF LTC3569EFE#TRPBF LTC3569EUD#PBF LTC3569EUD#TRPBF LTC3569EUDC#PBF LTC3569EUDC#TRPBF LTC3569IFE#PBF LTC3569IFE#TRPBF LTC3569IUD#PBF LTC3569IUD#TRPBF LTC3569IUDC#PBF LTC3569IUDC#TRPBF

Manufacturer's Classification

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

Other Names:

LTC3569IUDTRPBF, LTC3569IUD TRPBF