LTC1623 - SMBus Dual High-SideSwitch Controller
Features
- SMBus and I²C Compatible
- Built-In Charge Pumps Drive N-Channel Switches
- 16 Available Switches on the Same Bus
- 0.6V VIL and 1.4V VIH for DATA and CLK
- Available in 8-Lead MSOP and S0 Packages
- Low Standby Current: 14µA
- Eight Addresses from Two Three-State Address Pins
- Internal Power-On Reset Timer
- Internal Undervoltage Lockout
- No Need for External Pull-Up Resistors at Output
- No Need for Secondary Power Source
Typical Application
Description
The LTC®1623 SMBus switch controller is a slave device that controls two high-side N-channel MOSFETs on either the SMBus or the I²C bus. The LTC1623 operates with an input voltage from 2.7V to 5.5V with a low standby current of 14µA (at 3.3V). In accordance with the SMBus specification, the LTC1623 maintains the 0.6V VIL and 1.4V VIH input thresholds throughout the supply voltage range. Using the 2-wire interface, CLK and DATA, the LTC1623 monitors the bus for a start condition (DATA going from high to low while CLK is high). Once detected, the LTC1623 compares its address with the first (address) byte sent over the bus from the master. If matched, the LTC1623 will execute the second (command) byte from the master and independently control the built-in charge pumps to drive two external switches. The LTC1623 has two three-state programmable address pins, thus allowing eight different addresses and a total of sixteen available switches on the same bus.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 |
|---|---|---|---|---|---|
| LTC1623CMS8#PBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC1623CMS8#TRPBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC1623CS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1623CS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1623IS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LTC1623IS8#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | 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 | |
|---|---|---|---|---|---|---|
| LTC1623CMS8#PBF | MS-8 | C | $2.15 | $1.85 | Yes | |
| LTC1623CMS8#TRPBF | MS-8 | C | $1.91 | Yes | ||
| LTC1623CS8#PBF | SO-8 | C | $1.85 | $1.60 | Yes | |
| LTC1623CS8#TRPBF | SO-8 | C | $1.66 | Yes | ||
| LTC1623IS8#PBF | SO-8 | I | $2.25 | $1.95 | Yes | |
| LTC1623IS8#TRPBF | SO-8 | I | $2.01 | 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.Click here to view our complete list of demo boards
Applications
- Computer Peripheral Control
- Laptop Computer Power Plane Switching
- Portable Equipment Power Control
- Industrial Control Systems
- Handheld Equipment
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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:
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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.
