DocumentationDatasheet
Reliability Data
LT Journal
Press Release
cad_symbol
ltspice
- LT8570 Demo Circuit - Boost Converter (5V-10V to 12V @ 125mA)
- LT8570-1 Demo Circuit - Boost Converter (5-10V to 12V @ 60mA)
LTpowerCAD
Features
- 65V Power Switch
- Current Limit Options of 0.5A (LT8570) or 0.25A (LT8570-1)
- Adjustable Switching Frequency
- Single Feedback Resistor Sets VOUT
- Synchronizable to External Clock
- High Gain SHDN Pin Accepts Slowly Varying Input Signals
- Wide Input Voltage Range: 2.55V to 40V
- Low VCESAT Switch
- Integrated Soft-Start Function
- Easily Configurable as a Boost, SEPIC, or Inverting Converter
- User Configurable Undervoltage Lockout (UVLO)
- Pin Compatible with LT3580 and LT8580
- Tiny Thermally Enhanced 8-Lead 3mm × 3mm DFN and 8-Lead MSOP Packages
Typical Application
Description
The LT®8570 and LT8570-1 are PWM DC/DC converters. The LT8570 contains a 0.5A, 65V power switch, while the LT8570-1 contains a 0.25A, 65V power switch. The LT8570 and LT8570-1 can be configured as either a boost, SEPIC or inverting converter.
The LT8570/LT8570-1 have an adjustable oscillator, set by a resistor from the RT pin to ground. Additionally, the LT8570/LT8570-1 can be synchronized to an external clock. The switching frequency of the part may be free running or synchronized, and can be set between 200kHz and 1.5MHz.
The LT8570/LT8570-1 also feature innovative SHDN pin circuitry that allows for slowly varying input signals and an adjustable undervoltage lockout function.
Additional features such as frequency foldback and softstart are integrated. The LT8570/LT8570-1 are available in tiny thermally enhanced 3mm × 3mm 8-lead DFN and 8-lead MSOP packages.
3x3 DFN-8,MS-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT8570IDD#TRPBF | DFN | 8 | I | $2.54 | |
| LT8570EDD-1#TRPBF | DFN | 8 | E | $2.31 | |
| LT8570EDD-1#PBF | DFN | 8 | E | $3.22 | $2.25 |
| LT8570EMS8E-1#PBF | MSOP | 8 | E | $3.22 | $2.25 |
| LT8570IMS8E-1#PBF | MSOP | 8 | I | $3.54 | $2.48 |
| LT8570IDD#PBF | DFN | 8 | I | $3.54 | $2.48 |
| LT8570IMS8E-1#TRPBF | MSOP | 8 | I | $2.54 | |
| LT8570IMS8E#PBF | MSOP | 8 | I | $3.54 | $2.48 |
| LT8570EDD#TRPBF | DFN | 8 | E | $2.31 | |
| LT8570EMS8E#TRPBF | MSOP | 8 | E | $2.31 | |
| LT8570EMS8E#PBF | MSOP | 8 | E | $3.22 | $2.25 |
| LT8570EDD#PBF | DFN | 8 | E | $3.22 | $2.25 |
| LT8570IMS8E#TRPBF | MSOP | 8 | I | $2.54 | |
| LT8570IDD-1#TRPBF | DFN | 8 | I | $2.54 | |
| LT8570IDD-1#PBF | DFN | 8 | I | $3.54 | $2.48 |
| LT8570EMS8E-1#TRPBF | MSOP | 8 | E | $2.31 |
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 |
|---|---|---|---|
| DC2297A-A | LT8570EDD Demo Board | Boost, 65V Power Switch, 5V ≤ VIN ≤ 10V, Vout = 12V @ 125mA | $100.00 | |
| DC2297A-B | LT8570EDD-1 Demo Board | Boost, 5V ≤ VIN ≤ 10V, Vout = 12V @ 60mA | $100.00 |