Power Management
Switching Regulator
Step-Up (Boost) Regulators
Micropower Boost
Power Management
Switching Regulator
Step-Up (Boost) Regulators
Internal Power Switch Boost
LTC3122 - 15V, 2.5A Synchronous Step-Up DC/DC Converter with Output Disconnect
Features
- VIN Range: 1.8V to 5.5V, 500mV After Start-Up
- Output Voltage Range: 2.2V to 15V
- 800mA Output Current for VIN = 5V and VOUT = 12V
- Output Disconnects from Input When Shut Down
- Synchronous Rectification: Up to 95% Efficiency
- Inrush Current Limit
- Up to 3MHz Adjustable Switching Frequency Synchronizable to External Clock
- Selectable Burst Mode® Operation: 25μA IQ
- Output Overvoltage Protection
- Soft-Start
- <1μA IQ in Shutdown
- 12-Lead, 3mm × 4mm × 0.75mm Thermally Enhanced DFN and MSOP Packages
Typical Application
Description
The LTC®3122 is a synchronous step-up DC/DC converter with true output disconnect and inrush current limiting. The 2.5A current limit along with the ability to program output voltages up to 15V makes the LTC3122 well suited for a variety of demanding applications. Once started, operation will continue with inputs down to 500mV, extending runtime in many applications.
The LTC3122 features output disconnect in shutdown, dramatically reducing input power drain and enabling VOUT to completely discharge. Adjustable PWM switching from 100kHz to 3MHz optimizes applications for highest efficiency or smallest solution footprint. The oscillator can also be synchronized to an external clock for noise sensitive applications. Selectable Burst Mode operation reduces quiescent current to 25μA, ensuring high efficiency across the entire load range. An internal soft-start limits inrush current during start-up.
Other features include a <1μA shutdown current and robust protection under short-circuit, thermal overload, and output overvoltage conditions. The LTC3122 is offered in both a low profile 12-lead (3mm × 4mm × 0.75 mm) DFN package and a 12-lead thermally enhanced MSOP package.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
DFN-12, MS-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 |
|---|---|---|---|---|---|---|
| LTC3122EDE#PBF | DFN | 12 | E | $3.33 | $2.33 | View |
| LTC3122EDE#TRPBF | DFN | 12 | E | $2.39 | View | |
| LTC3122EMSE#PBF | MSOP | 12 | E | $3.33 | $2.33 | View |
| LTC3122EMSE#TRPBF | MSOP | 12 | E | $2.39 | View | |
| LTC3122IDE#PBF | DFN | 12 | I | $3.90 | $2.73 | View |
| LTC3122IDE#TRPBF | DFN | 12 | I | $2.79 | View | |
| LTC3122IMSE#PBF | MSOP | 12 | I | $3.90 | $2.73 | View |
| LTC3122IMSE#TRPBF | MSOP | 12 | I | $2.79 | View | |
| 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 |
|---|---|---|---|
| DC1764A | LTC3122EDE Demo Board I High Efficiency 15V 2.5A Synchronous Step-Up Converter | $150.00 | |
| Buy Now | |||
Applications
- RF Power
- Piezo Actuators
- Small DC Motors
- 12V Analog Rail From Battery, 5V, or Backup Capacitor
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LTC3122
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.
