ZHCSG23A March 2017 – February 2018 LM25141-Q1
PRODUCTION DATA.
The LM25141-Q1 operates with peak current mode control such that the compensation voltage is proportional to the peak inductor current. During no-load or light load conditions, the output capacitor will discharge very slowly. As a result, the compensation voltage does not demand a driver output pulses on a cycle-by-cycle basis. When the LM25141-Q1 controller detects that there have been 16 missing switching cycles, it enters Standby Mode and switches to a low IQ state to reduce the current drawn from VIN. For the LM25141-Q1 to go into a Standby Mode, the controller must be programmed for diode emulation (DEMB pin < 0.4 V). The typical IQ in Standby Mode is 35 μA with VOUT regulating at 3.3 V.