Datasheet Analog Devices LT8650SEV#PBF — 数据表

LT8650S
Dual Channel 4A, 42V,
Synchronous Step-Down Silent Switcher 2
with 6.2µA Quiescent Current
DESCRIPTION FEATURES Silent Switcher®2 Architecture:
n Ultralow EMI on Any PCB
n Eliminates PCB Layout Sensitivity
n Internal Bypass Capacitors Reduce Radiated EMI
n Optional Spread Spectrum Modulatio 4A DC from Each Channel Simultaneously
n Up to 6A on Either Channel
n Ultralow Quiescent Current Burst Mode® Operation:
n 6.2μA I Regulating 12V to 5V
Q
IN
OUT1 and 3.3VOUT2
n Output Ripple 0.8V, VVC1 = VVC2 = VCC,
VSYNC = 0V l VIN1 + VCC Quiescent Current in
Sleep with External Compensation VEN/UV1 = VEN/UV2 = 2V, VFB1 = VFB2 >0.8V, VVC1 = VVC2 = Float,
VSYNC = 0V l VIN1 + VCC Quiescent Current when
Active VEN/UV1 = VEN/UV2 = 2V, VFB1 = VFB2 >0.8V, VVC1 = VVC2 = VCC, VSYNC = 3.4V l VIN Current in Regulation VIN = 12V, VOUT = 3.3V, Output Load = 100µA, VVC1 = VVC2 = VCC, VSYNC = 0V
VIN = 12V, VOUT = 3.3V, Output Load = 1mA, VVC1 = VVC2 = VCC, VSYNC = 0V Feedback Reference Voltage
l Feedback Voltage Line Regulation VIN = 4.0V to 36V Feedback Pin Input Current VFB = 0.8V Minimum On-Time ILOAD = 3A, SYNC ≥ 2V l Oscillator Frequency RT = 133k
RT = 35.7k …

LT8650S
Dual Channel 4A, 42V,
Synchronous Step-Down Silent Switcher 2
with 6.2µA Quiescent Current
DESCRIPTION FEATURES Silent Switcher®2 Architecture:
nn Ultralow EMI on Any PCB
nn Eliminates PCB Layout Sensitivity
nn Internal Bypass Capacitors Reduce Radiated EMI
nn Optional Spread Spectrum Modulation
nn 4A DC from Each Channel Simultaneously
nn Up to 6A on Either Channel
nn Ultralow Quiescent Current BurstMode® Operation:
nn 6.2μA I Regulating 12V to 5V
Q
IN
OUT1 and 3.3VOUT2
nn Output Ripple 0.8V, VVC1 = VVC2 = VCC,
VSYNC = 0V l VIN1 + VCC Quiescent Current in
Sleep with External Compensation VEN/UV1 = VEN/UV2 = 2V, VFB1 = VFB2 >0.8V, VVC1 = VVC2 = Float,
VSYNC = 0V l 2 UNITS Rev A For more information www.analog.com LT8650S
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER CONDITIONS VIN1 + VCC Quiescent Current when …