LT8640AJUDCM#TRPBF
ActiveDC-DC SWITCHING SYNCHRONOUS BUCK REGULATOR, ADJUSTABLE, 3.4 TO 42 V IN, 3.3 TO 25V/5A OUT, QFN-EP-18
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LT8640AJUDCM#TRPBF
ActiveDC-DC SWITCHING SYNCHRONOUS BUCK REGULATOR, ADJUSTABLE, 3.4 TO 42 V IN, 3.3 TO 25V/5A OUT, QFN-EP-18
Technical Specifications
Parameters and characteristics for this part
| Specification | LT8640AJUDCM#TRPBF |
|---|---|
| Current - Output | 5 A |
| Frequency - Switching [Max] | 3 MHz |
| Frequency - Switching [Min] | 200 kHz |
| Function | Step-Down |
| Mounting Type | Wettable Flank, Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Package / Case | 20-WFQFN Exposed Pad, 18 Leads |
| Supplier Device Package | 20-QFN (3x4) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 42 V |
| Voltage - Input (Min) [Min] | 2.9 V |
| Voltage - Output (Max) [Max] | 41.58 V |
| Voltage - Output (Min/Fixed) [Min] | 0.97 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | Updated |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 8.26 | 1m+ |
| 10 | $ 5.67 | |||
| 25 | $ 5.00 | |||
| 100 | $ 4.26 | |||
| 250 | $ 3.89 | |||
| 500 | $ 3.67 | |||
| 1000 | $ 3.49 | |||
| Digi-Reel® | 1 | $ 8.26 | 1m+ | |
| 10 | $ 5.67 | |||
| 25 | $ 5.00 | |||
| 100 | $ 4.26 | |||
| 250 | $ 3.89 | |||
| 500 | $ 3.67 | |||
| 1000 | $ 3.49 | |||
| N/A | 0 | $ 7.93 | 1m+ | |
| Tape & Reel (TR) | 2500 | $ 3.35 | 1m+ | |
| Newark | Each (Supplied on Cut Tape) | 1 | $ 7.93 | 1m+ |
| 10 | $ 5.31 | |||
| 25 | $ 4.63 | |||
| 50 | $ 4.24 | |||
| 100 | $ 3.85 | |||
| 250 | $ 3.47 | |||
| 500 | $ 3.35 | |||
Description
General part information
LT8640 Series
The LT®8640S/LT8643S/LT8640SA/LT8643SA synchronous step-down regulator features second generation Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. This includes the integration of bypass capacitors to optimize all the fast current loops inside and make it easy to achieve advertised EMI performance by reducing layout sensitivity. This performance makes the LT8640S/LT8643S/LT8640SA/LT8643SA ideal for noise-sensitive applications and environments.Peak current mode control with a 30ns minimum on-time allows high step-down ratios even at high switching frequencies. The LT8643S/LT8643SA has external compensation to enable current sharing and fast transient response at high switching frequencies.Burst Mode operation enables ultralow standby current consumption, forced continuous mode can control frequency harmonics across the entire output load range, or spreadspectrum operation can further reduce EMI emissions.ApplicationsAutomotive and Industrial Supplies
Documents
Technical documentation and resources
