LTC3562 - I2C Quad Synchronous Step-Down DC/DC Regulator 2 x 600mA, 2 x 400mA
Features
- Four Independent I2C Controllable Step-Down Regulators (2 x 600mA, 2 x 400mA)
- Two I2C Programmable Feedback Voltage Regulators (R600A, R400A): VFB 425mV to 800mV
- Two I2C Programmable Output Voltage Regulators (R600B, R400B): VOUT 600mV to 3.775V
- Programmable Modes: Pulse Skip, LDO, Burst Mode, Forced Burst Mode Operation
- Quiescent Current <100uA (All Regulators Enabled in LDO Mode)
- Fixed 2.25MHz Switching Frequency (Pulse Skip Mode)
- Slew Limiting Reduces Switching Noise
- Power-On Reset Output for Regulator R600A
- Small, Thermally Enhanced, 20-Lead 3mm x 3mm QFN Package
Typical Application
Description
The LTC3562 is a quad high efficiency monolithic synchronous step-down regulator with an I2C interface. Two regulators are externally adjustable and can have their feedback voltages programmed between 425mV and 800mV in 25mV steps (Type A). The other two regulators are fixed output regulators whose output voltages can be programmed between 600mV and 3.775V in 25mV steps (Type B). All four regulators operate independently and can be put into pulse skip, LDO, Burst Mode operation, or forced Burst Mode operation through I2C control. The Type-A regulators have separate RUN pins that can be enabled if I2C control is unavailable.
The 2.85V to 5.5V input voltage range makes the LTC3562 ideally suited for single Li-Ion battery-powered applications. At low output load conditions, the regulators can be switched into LDO, Burst Mode operation, or forced Burst Mode operation, extending battery life in portable systems. The quiescent current drops to under 100uA with all regulators in LDO mode, and under 0.1uA when all regulators are shut down.
Switching frequency is internally set to 2.25MHz, allowing the use of small surface mount inductors and capacitors. All regulators are internally compensated. The LTC3562 is available in a low profile 3mm x 3mm QFN package.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC3562EUD#PBF | 3x3 QFN-20 | UD | E | 05-08-1720 | Yes |
| LTC3562EUD#TRPBF | 3x3 QFN-20 | UD | E | 05-08-1720 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3562EUD#PBF | 3x3 QFN-20 | E | $4.64 | $3.25 | Yes | |
| LTC3562EUD#TRPBF | 3x3 QFN-20 | E | $3.31 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1123A | LTC3562EUD Demo Board | Quad, I2C Programmed, 2.85V ≤ VIN ≤ 5.5V, Vout1,2 = 1.8V,Adj @ 600mA; Vout3,4 = 1.5V,Adj @ 400mA | $125.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC590B | Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards | $50.00 | |
| Buy Now | |||
Applications
- Miscellaneous Handheld Applications with Multiple Supply Rails
- Personal Information Appliances
- Wireless and DSL Modems
- Digital Still Cameras
- MP3 Players
- Portable Instruments
People Who Viewed This Product Also Viewed
- LT3652 - Power Tracking 2A Battery Charger for Solar Power
- LT1763 - 500mA, Low Noise, LDO Micropower Regulators
- LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator
- LTC3880 - Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
- LTC4364 - Surge Stopper with Ideal Diode
- LT8471 - Dual Multitopology DC/DC Converters with 2A Switches and Synchronization
- LT8614 - 42V, 4A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current
- LT4363 - High Voltage Surge Stopper with Current Limit
- LT8705 - 80V VIN and VOUT Synchronous 4-Switch Buck- Boost DC/DC Controller
- LTM4676 - Dual 13A or Single 26A μModule (Power Module) Regulator with Digital Power System Management
Product Notifications
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.
Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
