Datasheet Linear Technology LT1938
| Manufacturer | Linear Technology |
| Series | LT1938 |
25V, 2.2A, 2.8MHz Step-Down Switching Regulator
Datasheets
Datasheet LT1938
PDF, 271 Kb, Language: en, File uploaded: Sep 3, 2017, Pages: 24
25V, 2.2A, 2.8MHz Step-Down Switching Regulator
25V, 2.2A, 2.8MHz Step-Down Switching Regulator
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Prices
Packaging
| LT1938EDD#PBF | LT1938EDD#TRPBF | LT1938IDD#PBF | LT1938IDD#TRPBF | |
|---|---|---|---|---|
| N | 1 | 2 | 3 | 4 |
| Package | 3x3 DFN-10 Package Outline Drawing | 3x3 DFN-10 Package Outline Drawing | 3x3 DFN-10 Package Outline Drawing | 3x3 DFN-10 Package Outline Drawing |
| Package Code | DD | DD | DD | DD |
| Package Index | 05-08-1699 | 05-08-1699 | 05-08-1699 | 05-08-1699 |
| Pin Count | 10 | 10 | 10 | 10 |
Parametrics
| Parameters / Models | LT1938EDD#PBF | LT1938EDD#TRPBF | LT1938IDD#PBF | LT1938IDD#TRPBF |
|---|---|---|---|---|
| Architecture | Constant Frequency Current Mode | Constant Frequency Current Mode | Constant Frequency Current Mode | Constant Frequency Current Mode |
| Demo Boards | DC1273A | DC1273A | DC1273A | DC1273A |
| Design Tools | LTspice File,LTpowerCAD Model | LTspice File,LTpowerCAD Model | LTspice File,LTpowerCAD Model | LTspice File,LTpowerCAD Model |
| Export Control | no | no | no | no |
| Features | Integrated Boost Diode, Power Good, Resistor Set Frequency | Integrated Boost Diode, Power Good, Resistor Set Frequency | Integrated Boost Diode, Power Good, Resistor Set Frequency | Integrated Boost Diode, Power Good, Resistor Set Frequency |
| Frequency, kHz | 2800 | 2800 | 2800 | 2800 |
| Frequency Adjust Range | 300kHz - 2.8MHz | 300kHz - 2.8MHz | 300kHz - 2.8MHz | 300kHz - 2.8MHz |
| Integrated Inductor | no | no | no | no |
| Ishutdown, µA | 0.1 | 0.1 | 0.1 | 0.1 |
| Isupply, mA | 0.4 | 0.4 | 0.4 | 0.4 |
| Max Phases | 1 | 1 | 1 | 1 |
| Monolithic | yes | yes | yes | yes |
| Number of Outputs | 1 | 1 | 1 | 1 |
| Operating Temperature Range, °C | 0 to 85 | 0 to 85 | -40 to 85 | -40 to 85 |
| Output Current, A | 2.2 | 2.2 | 2.2 | 2.2 |
| Polyphase | no | no | no | no |
| Switch Current, A | 3.6 | 3.6 | 3.6 | 3.6 |
| Synchronous | no | no | no | no |
| Topology | Buck | Buck | Buck | Buck |
| Vin Max, V | 25 | 25 | 25 | 25 |
| Vin Min, V | 3.6 | 3.6 | 3.6 | 3.6 |
| Vout Max, V | 23.875 | 23.875 | 23.875 | 23.875 |
| Vout Maximum | .95Vin | .95Vin | .95Vin | .95Vin |
| Vout Min, V | 1.265 | 1.265 | 1.265 | 1.265 |
Eco Plan
| LT1938EDD#PBF | LT1938EDD#TRPBF | LT1938IDD#PBF | LT1938IDD#TRPBF | |
|---|---|---|---|---|
| RoHS | Compliant | Compliant | Compliant | Compliant |
Model Line
Series: LT1938 (4)
Manufacturer's Classification
- Power Management > Switching Regulator > Step-Down (Buck) Regulators > Internal Power Switch Buck
