Features
- Silent Switcher®2 Architecture:
- Ultralow EMI on Any PCB n Eliminates PCB Layout Sensitivity
- Internal Bypass Capacitors Reduce Radiated EMI
- Optional Spread Spectrum Modulation
- 4A DC from Each Channel Simultaneously
- Up to 6A on Either Channel
- Ultralow Quiescent Current Burst Mode® Operation:
- 6.2μA IQ Regulating 12VIN to 5VOUT1 and 3.3VOUT2
- Output Ripple <10mVP-P
- Optional External VC Pin: Fast Transient Response and Current Sharing (Extra 50µA IQ/Channel)
- Forced Continuous Mode
- High Efficiency at High Frequency
- 94.6% Efficiency at 2A, 5VOUT from 12VIN at 2MHz
- 93.3% Efficiency at 4A, 5VOUT from 12VIN at 2MHz
- Fast Minimum Switch-On Time: 40ns
- Wide Input Voltage Range: 3.0V to 42V
- Adjustable and Synchronizable: 300kHz to 3MHz
- Small 4mm × 6mm 32-Pin LQFN Package
Typical Application
Description
The LT®8650S is a dual step-down regulator that delivers up to 4A of continuous current from both channels and supports loads up to 6A from each channel. The LT8650S features the second generation Silent Switcher architecture to minimize EMI emissions while delivering high efficiency at high switching frequencies. This includes integration of bypass capacitors to optimize high frequency current loops and make it easy to achieve advertised EMI performance by eliminating layout sensitivity.
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 at high switching frequencies.
Read More: LT8650S – Dual Channel 4A, 42V, Synchronous Step-Down Silent Switcher