LT8646 vs LT8646SIV#WPBF Comparison
Detailed side-by-side comparison of LT8646 by Analog Devices and LT8646SIV#WPBF by Analog Devices. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
Specification Comparison
| Parameter | LT8646 | LT8646SIV#WPBF |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Category | DC-DC Converters | DC-DC Converters |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $5.18 | $6.20 |
| Topology | Synchronous Step-Down (Buck) | Synchronous Step-Down (Buck) |
| Input Voltage Range | 3 V to 65 V (65 V abs max) | 3.4 V to 65 V |
| Output Voltage Range | 0.97 V to VIN (adjustable) | 0.97 V to 64 V (adjustable) |
| Maximum Output Current | 8 A continuous | 8 A |
| Quiescent Current | 2.5 µA (typical at no load) | — |
| Switching Frequency | 200 kHz to 3 MHz (programmable, synchronisable) | — |
| Architecture | Silent Switcher 2 with internal bypass capacitors | Silent Switcher 2 with integrated bypass capacitors |
| Efficiency | >95 % at 12V to 3.3V/8A | — |
| Internal MOSFETs | Yes (high-side and low-side integrated) | Top + bottom N-channel MOSFET switches |
| Spread Spectrum | Yes (selectable) | — |
| Soft-Start | Internal, programmable | — |
| Output Over-Voltage Protection | Yes (latch-off) | — |
| Thermal Shutdown | Yes | — |
| Operating Junction Temperature | -40 °C to +125 °C | — |
| Package | 32-TFQFN Exposed Pad (5 mm × 6 mm) | 32-pin LQFN (6 mm x 4 mm) with Exposed Pad |
| Mounting Type | Surface Mount | Surface Mount |
| RoHS Status | Compliant | Compliant |
| Switching Frequency Range | — | 200 kHz to 2.2 MHz (programmable) |
| Quiescent Current (Burst Mode) | — | 2.5 µA typical |
| Peak Efficiency | — | 96% |
| Operating Temperature Range | — | -40°C to +125°C (-IV suffix) |
| MSL Level | — | 3 (per JEDEC J-STD-020) |
| Automotive Qualification | — | AEC-Q100 (Automotive grade per Arrow listing) |
| Synchronization | — | External clock sync input |
| Power Good Flag | — | Yes |
| Thermal Resistance (θJA) | — | ~25°C/W on 4-layer JEDEC board (estimated from package family) |