The LM25148-Q1 is a 42V, ultra-low
IQ synchronous buck DC/DC controller for high-current, single-output
applications. The controller uses a peak current-mode control architecture for easy loop
compensation, fast transient response, and excellent load and line regulation. The LM25148-Q1 can be set up in dual-phase mode (paralleled output) with accurate
current sharing for high-current applications. The device can operate at input voltages as
low as 3.5V, at nearly 100% duty cycle if needed.
The LM25148-Q1 has a unique EMI reduction
feature known as Dual Random Spread Spectrum (DRSS). Combining low-frequency triangular and
high-frequency random modulations mitigates EMI disturbances across lower and higher
frequency bands, respectively. This hybrid technique aligns with the multiple resolution
bandwidth (RBW) settings specified in industry-standard EMC tests.
Additional features of the LM25148-Q1 include 150°C maximum
junction temperature operation, user-selectable diode emulation for lower
current consumption at light-load conditions, open-drain power-good flag for
fault reporting and output monitoring, precision enable input, monotonic
start-up into prebiased load, integrated VCC bias supply regulator, internal
3ms soft-start time, and thermal shutdown protection with automatic
recovery.
The LM25148-Q1 is a 42V, ultra-low
IQ synchronous buck DC/DC controller for high-current, single-output
applications. The controller uses a peak current-mode control architecture for easy loop
compensation, fast transient response, and excellent load and line regulation. The LM25148-Q1 can be set up in dual-phase mode (paralleled output) with accurate
current sharing for high-current applications. The device can operate at input voltages as
low as 3.5V, at nearly 100% duty cycle if needed.
The LM25148-Q1 has a unique EMI reduction
feature known as Dual Random Spread Spectrum (DRSS). Combining low-frequency triangular and
high-frequency random modulations mitigates EMI disturbances across lower and higher
frequency bands, respectively. This hybrid technique aligns with the multiple resolution
bandwidth (RBW) settings specified in industry-standard EMC tests.
Additional features of the LM25148-Q1 include 150°C maximum
junction temperature operation, user-selectable diode emulation for lower
current consumption at light-load conditions, open-drain power-good flag for
fault reporting and output monitoring, precision enable input, monotonic
start-up into prebiased load, integrated VCC bias supply regulator, internal
3ms soft-start time, and thermal shutdown protection with automatic
recovery.