LTC3569IUDC#PBF

Active

Analog Devices Inc./Maxim Integrated

TRIPLE BUCK REGULATOR WITH 1.2A AND TWO 600MA OUTPUTS AND INDIVIDUAL PROGRAMMABLE REFERENCES

LTC3569IUDC#PBF

Active

Analog Devices Inc./Maxim Integrated

TRIPLE BUCK REGULATOR WITH 1.2A AND TWO 600MA OUTPUTS AND INDIVIDUAL PROGRAMMABLE REFERENCES

Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3569 Series

The LTC3569 contains three monolithic, synchronous step-down DC/DC converters. Intended for medium power applications, it operates over a 2.5V to 5.5V input voltage range. The operating frequency is adjustable from 1MHz to 3MHz, allowing the use of tiny, low cost capacitors and inductors. The three output voltages are independently programmable by toggling the EN pins up to 15 times, lowering the 800mV FB references by 25mV per cycle. The first buck regulator sources load currents up to 1200mA. The other two buck regulators each provide 600mA.The two 600mA buck regulators can also be configured to operate as slave power stages, running in parallel with another internal buck regulator to supply higher load currents. When operating as parallel, slave output stages, discrete external components are shared and available output currents sum together.ApplicationsPortable Applications with Multiple Supply RailsGeneral Purpose Step-Down DC/DCDynamic Voltage Scaling Applications

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3569IUDC#PBF

Current - Output (Max)	1.2 A
Current - Output (Min)	600 mA
Frequency - Switching (Max)	3 MHz
Frequency - Switching (Min)	1 MHz
Frequency - Switching (Typical)	2.25 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	3
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	20-WFQFN Exposed Pad
Package Length	3 mm
Package Name	20-QFN
Package Width	4 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	5.5 V
Voltage - Input (Min)	2.5 V
Voltage - Output (Max)	5.5 V
Voltage - Output (Min/Fixed)	0.425 V

LTC3569 Series

Part	Mounting Type	Output Configuration	Voltage - Output (Max)	Package Length	Package Name	Package Width	Topology	Package / Case	Frequency - Switching (Typical)	Frequency - Switching (Max)	Frequency - Switching (Min)	Function	Output Type	Current - Output (Max)	Current - Output (Min)	Synchronous Rectifier	Number of Outputs	Voltage - Output (Min/Fixed)	Voltage - Input (Min)	Voltage - Input (Max)	Operating Temperature (Max)	Operating Temperature (Min)	Package Features
Analog Devices Inc./Maxim Integrated LTC3569IUD#PBF	Surface Mount	Positive	5.5 V	3 mm	20-QFN	3 mm	Buck	20-WFQFN Exposed Pad	2.25 MHz	3 MHz	1 MHz	Step-Down	Adjustable	1.2 A	600 mA	Yes	3	0.425 V	2.5 V	5.5 V	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3569EUDC#TRPBF	Surface Mount	Positive	5.5 V	3 mm	20-QFN	4 mm	Buck	20-WFQFN Exposed Pad	2.25 MHz	3 MHz	1 MHz	Step-Down	Adjustable	1.2 A	600 mA	Yes	3	0.425 V	2.5 V	5.5 V	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3569IUDC#TRPBF	Surface Mount	Positive	5.5 V	3 mm	20-QFN	4 mm	Buck	20-WFQFN Exposed Pad	2.25 MHz	3 MHz	1 MHz	Step-Down	Adjustable	1.2 A	600 mA	Yes	3	0.425 V	2.5 V	5.5 V	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3569IFE#TRPBF	Surface Mount	Positive	5.5 V	0.173 in	16-TSSOP 16-TSSOP-EP	4.4 mm	Buck		2.25 MHz	3 MHz	1 MHz	Step-Down	Adjustable	1.2 A	600 mA	Yes	3	0.425 V	2.5 V	5.5 V	125 °C	-40 °C	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3569IFE#PBF	Surface Mount	Positive	5.5 V	0.173 in	16-TSSOP 16-TSSOP-EP	4.4 mm	Buck		2.25 MHz	3 MHz	1 MHz	Step-Down	Adjustable	1.2 A	600 mA	Yes	3	0.425 V	2.5 V	5.5 V	125 °C	-40 °C	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3569EFE#PBF	Surface Mount	Positive	5.5 V	0.173 in	16-TSSOP 16-TSSOP-EP	4.4 mm	Buck		2.25 MHz	3 MHz	1 MHz	Step-Down	Adjustable	1.2 A	600 mA	Yes	3	0.425 V	2.5 V	5.5 V	125 °C	-40 °C	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3569EUDC#PBF	Surface Mount	Positive	5.5 V	3 mm	20-QFN	4 mm	Buck	20-WFQFN Exposed Pad	2.25 MHz	3 MHz	1 MHz	Step-Down	Adjustable	1.2 A	600 mA	Yes	3	0.425 V	2.5 V	5.5 V	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3569EFE#TRPBF	Surface Mount	Positive	5.5 V	0.173 in	16-TSSOP 16-TSSOP-EP	4.4 mm	Buck		2.25 MHz	3 MHz	1 MHz	Step-Down	Adjustable	1.2 A	600 mA	Yes	3	0.425 V	2.5 V	5.5 V	125 °C	-40 °C	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3569IUDC#PBF	Surface Mount	Positive	5.5 V	3 mm	20-QFN	4 mm	Buck	20-WFQFN Exposed Pad	2.25 MHz	3 MHz	1 MHz	Step-Down	Adjustable	1.2 A	600 mA	Yes	3	0.425 V	2.5 V	5.5 V	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3569IUD#TRPBF	Surface Mount	Positive	5.5 V	3 mm	20-QFN	3 mm	Buck	20-WFQFN Exposed Pad	2.25 MHz	3 MHz	1 MHz	Step-Down	Adjustable	1.2 A	600 mA	Yes	3	0.425 V	2.5 V	5.5 V	125 °C	-40 °C

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R415 Reliability Data

LTC3569IUDC#PBF | Datasheet