LTC3569
PRODUCTIONTriple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References
- Part Models
- 12
- 1ku List Price
- Starting From $4.71
Overview
- Three Independent Current Mode Buck DC/DC Regulators (1.2A and 2 × 600mA)
- Single Pin Programmable VFB Servo Voltages from 800mV Down to 425mV (in 25mV Steps)
- Pull VFB High to Make Each 600mA Buck a Slave for Higher Current Operation
- Pulse-Skipping or Burst Mode® Operation
- Programmable Switching Frequency (1MHz to 3MHz) or Fixed 2.25MHz
- Synchronizable (1.2MHz to 3MHz)
- VIN Range 2.5V to 5.5V
- All Regulators Internally Compensated
- PGOOD Output Flag
- Quiescent Current <100μA (All Regulators in Burst Mode Operation)
- Zero Shutdown Current
- Overtemperature and Short-Circuit Protection
- Tiny 3mm × 3mm, 3mm × 4mm 20-Lead QFN and Thermally Enhanced TSSOP FE-16 Packages
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.
Applications
- Portable Applications with Multiple Supply Rails
- General Purpose Step-Down DC/DC
- Dynamic Voltage Scaling Applications
Documentation
Data Sheet 1
User Guide 1
Design Note 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3569EFE#PBF | 16-Lead TSSOP w/ EP | ||
| LTC3569EFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LTC3569EUD#PBF | 20-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3569EUD#TRPBF | 20-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3569EUDC#PBF | 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) | ||
| LTC3569EUDC#TRPBF | 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) | ||
| LTC3569IFE#PBF | 16-Lead TSSOP w/ EP | ||
| LTC3569IFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LTC3569IUD#PBF | 20-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3569IUD#TRPBF | 20-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3569IUDC#PBF | 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) | ||
| LTC3569IUDC#TRPBF | 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LTC3569EFE#PBF | PRODUCTION | |
| LTC3569EFE#TRPBF | PRODUCTION | |
| LTC3569IFE#PBF | PRODUCTION | |
| LTC3569IFE#TRPBF | PRODUCTION | |
|
Jun 30, 2020 - 20_0244 Notification of Wafer Fab Location Change for 0.6µm CMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan) |
||
| LTC3569EFE#PBF | PRODUCTION | |
| LTC3569EFE#TRPBF | PRODUCTION | |
| LTC3569EUD#PBF | PRODUCTION | |
| LTC3569EUD#TRPBF | PRODUCTION | |
| LTC3569EUDC#PBF | PRODUCTION | |
| LTC3569EUDC#TRPBF | PRODUCTION | |
| LTC3569IFE#PBF | PRODUCTION | |
| LTC3569IFE#TRPBF | PRODUCTION | |
| LTC3569IUD#PBF | PRODUCTION | |
| LTC3569IUD#TRPBF | PRODUCTION | |
| LTC3569IUDC#PBF | PRODUCTION | |
| LTC3569IUDC#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3569
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC3569EUD Demo Board | Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References