•
Up to 200 MHz in DLL off mode
LT8636 - 42V, 5A/7A Peak Synchronous Step-Down Silent
Switcher with 2.5µA Quiescent Current
The LT8636 synchronous step-down regulator features Silent Switcher architecture designed to minimize EMI
emissions while delivering high efficiency at high switching frequencies. Peak current mode control with a 30ns
minimum on-time allows high step-down ratios even at high switching frequencies.
The LT8636’s ultralow 2.5µA quiescent current—with the output in full regulation—enables applications requiring
highest efficiency at very small load currents. A CLKOUT pin enables synchronizing other regulators to the
LT8636.
Burst Mode operation enables ultralow standby current consumption, forced continuous mode can control frequen-
cy harmonics across the entire output load range, or spread spectrum operation can further reduce EMI emissions.
Soft-start and tracking functionality is accessed via the TR/SS pin, and an accurate input voltage UVLO threshold
can be set using the EN/UV pin.
LTC3307A - 5V, 3A Synchronous Step-Down Silent Switcher in
2mm × 2mm LQFN
The LTC3307A is a very small, high efficiency, low noise, monolithic synchronous 3A step-down DC/DC converter
operating from a 2.25V to 5.5V input supply. Using constant frequency, peak current mode control at switching
frequencies up to 3MHz and minimum on-time as low as 22ns, this regulator achieves fast transient response with
small external components. Silent Switcher architecture minimizes EMI emissions.
The LTC3307A operates in forced continuous or pulse skip mode for low noise, or low-ripple Burst Mode operation
for high efficiency at light loads, ideal for battery-powered systems. The IC regulates output voltages as low as
500mV. Other features include output overvoltage protection, short-circuit protection, thermal shutdown, clock
synchronization, and up to 100% duty cycle operation for low dropout. The device is available in a low profile 12-
lead 2mm × 2mm × 0.74mm LQFN package with exposed pad for low thermal resistance.
LTC3310S - 5V, 10A Synchronous Step-Down Silent Switcher 2
in 3mm × 3mm LQFN
The LTC3310S is a very small, low noise, monolithic step-down DC/DC converter capable of providing up to 10A
of output current from a 2.25V to 5.5V input supply. The device employs Silent Switcher 2 architecture with inter-
nal hot loop bypass capacitors to achieve both low EMI and high efficiency at switching frequencies as high as
5MHz. For systems with higher power requirements, multi-phasing parallel converters is readily implemented.
The LTC3310S uses a constant-frequency, peak current mode control architecture for fast transient response. A
500mV reference allows for low voltage outputs. 100% duty cycle operation delivers low drop out.
LT8636 - 42V, 5A/7A Peak Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current
EV-21593-SOM
®
Manual
2–7
Содержание ADSP-21591
Страница 32: ...EV 21593 SOM Manual 17...
