DocumentationDatasheet
Design Note
- DN223 - SOT-23 DC/DC Converters Generate Up to ±35V Outputs and Consume Only 20µA of Quiescent Current
- DN231 - Tiny Regulators Drive White LED Backlights
- DN232 - SOT-23 Switching Regulator with Integrated 1A Switch Delivers High Current Outputs in a Small Footprint
Reliability Data
LT Journal
cad_symbol
ltspice
Features
- Low Quiescent Current:
20µA in Active Mode
<1µA in Shutdown Mode - Operates with VIN as Low as 1V
- Low VCESAT Switch: 250mV at 300mA
- Uses Small Surface Mount Components
- High Output Voltage: Up to 34V
- Low Profile (1mm) ThinSOT™ Package
Typical Application
Description
The LT1615/LT1615-1 are micropower step-up DC/DC converters in a 5-lead low profile (1mm) ThinSOT package. The LT1615 is designed for higher power systems with a 350mA current limit and an input voltage range of 1.2V to 15V, whereas the LT1615-1 is intended for lower power and single-cell applications with a 100mA current limit and an extended input voltage range of 1V to 15V. Otherwise, the two devices are functionally equivalent. Both devices feature a quiescent current of only 20µA at no load, which further reduces to 0.5µA in shutdown. A current limited, fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load current. The 36V switch allows high voltage outputs up to 34V to be easily generated in a simple boost topology without the use of costly transformers. The LT1615’s low off-time of 400ns permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications.
SOT-23
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT1615ES5#PBF | SOT | 5 | E | $2.11 | |
| LT1615ES5#TRMPBF | SOT | 5 | E | $2.11 | $1.72 |
| LT1615ES5#TRPBF | SOT | 5 | E | $2.11 | $1.70 |
| LT1615ES5-1#PBF | SOT | 5 | E | $2.11 | |
| LT1615ES5-1#TRMPBF | SOT | 5 | E | $2.11 | $1.72 |
| LT1615ES5-1#TRPBF | SOT | 5 | E | $2.11 | $1.70 |
| LT1615IS5#PBF | SOT | 5 | I | $2.34 | |
| LT1615IS5#TRMPBF | SOT | 5 | I | $2.34 | $1.98 |
| LT1615IS5#TRPBF | SOT | 5 | I | $2.34 | $1.96 |
| LT1615IS5-1#PBF | SOT | 5 | I | $2.93 | |
| LT1615IS5-1#TRMPBF | SOT | 5 | I | $2.93 | $1.98 |
| LT1615IS5-1#TRPBF | SOT | 5 | I | $2.93 | $1.96 |
| LT1615ES5 | SOT | 5 | E | $4.22 | |
| LT1615ES5#TR | SOT | 5 | E | $4.22 | $3.40 |
| LT1615ES5-1 | SOT | 5 | E | $4.22 | |
| LT1615ES5-1#TR | SOT | 5 | E | $4.22 | $3.40 |
| LT1615IS5 | SOT | 5 | I | $4.62 | |
| LT1615IS5#TR | SOT | 5 | I | $4.68 | $3.92 |
| LT1615IS5-1 | SOT | 5 | I | $5.86 | |
| LT1615IS5-1#TR | SOT | 5 | I | $5.86 | $3.92 |
| LT1615ES5#TRM | SOT | 5 | E | $4.22 | $3.44 |
| LT1615ES5-1#TRM | SOT | 5 | E | $4.22 | $3.44 |
| LT1615IS5#TRM | SOT | 5 | I | $4.68 | $3.96 |
| LT1615IS5-1#TRM | SOT | 5 | I | $5.86 | $3.96 |
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.