Power Management
Switching Regulator
Step-Up (Boost) Regulators
Micropower Boost
Power Management
Switching Regulator
Step-Up (Boost) Regulators
Internal Power Switch Boost
LTC3458L - 1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect
Features
- High Efficiency: Up to 95%
- Inrush Current Limiting and Output Disconnect
- Programmable Output Voltages up to 6V
- 1.5V to 6V Input Range
- Programmable/Synchronizable Fixed Frequency Operation up to 1.5MHz
- Programmable Automatic Burst Mode® Operation
- Current Mode Control with Programmable Soft-Start Period and Peak Current Limit
- 0.2 Ohm N-Channel and 0.3 Ohm P-Channel Switches
- Ultralow Quiescent Currents: 12µA Sleep, <1µA in Shutdown
- 12-Pin 4mm × 3mm Thermally Enhanced DFN Package
Typical Application
Description
The LTC3458L is a high efficiency, current mode, fixed frequency, step up DC/DC converter with true output disconnect and inrush current limiting. The LTC3458L is rated for up to 6V output and includes a 0.2 Ohm N-channel MOSFET switch and a 0.3 Ohm P-channel MOSFET synchronous rectifier. The LTC3458L is well suited for battery powered applications and includes programmable output voltage, switching frequency and loop compensation. The oscillator frequency can be set up to 1.5MHz or synchronized to an external clock.Quiescent current is only 12µA during Burst Mode operation maximizing battery life in portable applications. The Burst Mode current threshold, peak current limit, and softstart are externally programmable. Other features include <1µA shutdown current, antiringing control, and thermal limit. The LTC3458L is available in a low profile (0.75mm), 4mm × 3mm 12-pin DFN package.
Protected by U.S. Patents including 5481178, 6304066, 6580258, 5511131, 6498466
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
DFN-12
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- 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 | Pins | Temp | Price (1-99) | Price (1k)* | RoHS Data |
|---|---|---|---|---|---|---|
| LTC3458EDE | DFN | 12 | E | $3.93 | $3.30 | View |
| LTC3458EDE#PBF | DFN | 12 | E | $3.93 | $3.30 | View |
| LTC3458EDE#TR | DFN | 12 | E | $3.40 | View | |
| LTC3458EDE#TRPBF | DFN | 12 | E | $3.40 | View | |
| LTC3458LEDE | DFN | 12 | E | $3.93 | $3.30 | View |
| LTC3458LEDE#PBF | DFN | 12 | E | $3.93 | $3.30 | View |
| LTC3458LEDE#TR | DFN | 12 | E | $3.40 | View | |
| LTC3458LEDE#TRPBF | DFN | 12 | E | $3.40 | View | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology demo boards are offered free of charge to qualified customers. Contact your local sales office or distributor to request 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 |
|---|---|---|---|
| DC878A | LTC3458LEDE Demo Board | $100.00 | |
| Buy Now | |||
Applications
- Point-of-Load Regulators
- USB VBUS Power
- Portable GPS
- MP3 Players
Simulate
LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.
To launch a ready to run LTspice demonstration circuit for this part:
- Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
- Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
- Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu
To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.
Related models available in LTspice IV
LTC3458
LTC3458L
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.
