Analog Devices Inc. LT8647 Synchronous Step-Down Regulator
Analog Devices LT8647 Synchronous Step-Down Regulator features the Silent Switcher® architecture designed to minimize Electromagnetic interference (EMI) emissions while delivering high efficiency at high switching frequencies. This performance makes the LT8647 ideal for noise-sensitive applications and environments.
The fast, clean, low-overshoot switching edges enable high-efficiency operation even at high-switching frequencies, leading to a small overall solution size. Peak current mode control with a 40ns minimum on-time allows high step-down ratios even at high switching frequencies.
The Analog Devices LT8647's burst mode operation enables ultra-low standby current consumption, pulse-skipping mode allows full switching frequency at lower output loads, and spread spectrum operation can further reduce EMI emissions.
Features
- Silent Switcher architecture
- Ultra-low EMI emissions
- Optional spread spectrum modulation
- High efficiency at a high frequency
- Up to 95% efficiency at 1MHz, 12VIN to 5VOUT
- Up to 94% efficiency at 2MHz, 12VIN to 5VOUT
- Ultra-low quiescent current Burst Mode® operation
- 2.5μA IQ regulating 12VIN to 3.3VOUT
- Output ripple < 10mVP-P
- Wide 3.4V to 65V input voltage range
- 7A maximum continuous output and 8A peak transient output
- Fast 40ns minimum switch-on-time
- Low 60mV dropout under all conditions at 1A
- 200kHz to 2.2MHz adjustable and synchronizable frequency
- Peak current mode operation
- Output soft-start and tracking
- Small 27-lead 6mm × 3mm flip chip 2-quad flat no-lead (FC2QFN) package
Applications
- Industrial supplies
- General-purpose step-down
Typical Application Circuit
Development Tool
Analog Devices Inc. EVAL-LT8647-AZ Evaluation Board
The evaluation board evaluates the LT8647, a synchronous step-down switching regulator.
Published: 2025-09-15
| Updated: 2025-10-01