1. Linear Technology Corp.
Hot Product: LTC3124
July 8, 2014
Tony Armstrong Director of Product Marketing, Power Products

2. Why the Need for the LTC3124?
Powerful Monolithic Boost Converter—Dual Phase 2.5A Switch Delivers 5A of Switch Current with Low Input and Output Ripple
Many Applications Need to a Boosted Output at 12V with Over 1A of Output Current. Common Example 5VIN to 12VOUT at 1.5A
Synchronous Rectification Maximizes Efficiency and Minimizes Thermal Concerns
These Large Monolithic Boost Converters Must be Capable of Operating from Wide Range of Input Sources—SuperCaps, Dual Alkaline, Li-Ion and 5V Fixed Rails: So a 1.8V to 5.5V Start-Up (and down to 500mV after Start-Up)Input Voltage Range is Ideal
Inrush Current Limiting and Robust Output Short-Circuit Protection is Need for System Safety/Reliability
Adjustable Output Voltage Range of 2.5V to 15V Services a Wide Range of Commercial and Industrial Applications
Simple, Compact Footprint

3. LTC3124: What Is It?
15V, 5A 2-Phase Monolithic Synchronous Boost Converter
VIN Range: 1.8V to 5.5V Start-Up, Down to 500mV After Start-Up
VOUT Range: 2.5V to 15V
95% Efficiency and 25uA Of Quiescent Current
Robust Inrush Current Limiting and Short-Circuit Protection
Programmable Switching Frequencies to 3MHz

4. LTC3124: Key Features
VIN Range: 1.8V to 5.5V, Down to 500mV After Start-Up
Adjustable Output Voltage: 2.5V to 15V
1.5A Output Current for VIN = 5V and VOUT = 12V
Dual-Phase Control Reduces Output Voltage Ripple
Output Disconnects from Input When Shut Down
Synchronous Rectification: Up to 95% Efficiency
Inrush Current Limit
Up to 3MHz Programmable Switching Frequency Synchronizable to External Clock
Selectable Burst Mode® Operation: 25μA IQ
Output Overvoltage Protection
Internal Soft-Start
<1μA IQ in Shutdown
16-Lead, Thermally Enhanced 3mm × 5mm × 0.75mm DFN and TSSOP Packages

5. LTC3124: Typical Application Schematic

6. LTC3124: Efficiency of Typical Application (of Schematic on Previous Slide)
VIN=5V, VOUT=12V

7. LTC3124: Packages

8. LTC3124: Typical Applications