參數(shù)資料
型號: L6732TR
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
封裝: LEAD FREE, HTSSOP-16
文件頁數(shù): 13/37頁
文件大小: 898K
代理商: L6732TR
Device description
L6732
20/37
5.11
Minimum on-time (TON, MIN)
The device can manage minimum on-times lower than 100 ns. This feature comes down
from the control topology and from the particular over-current-protection system of the
L6732. In fact, in a voltage mode controller the current has not to be sensed to perform the
regulation and, in the case of L6732, neither for the over-current protection, given that
during the off-time the valley-current-protection can operate in every case. The first
advantage related to this feature is the possibility to realize extremely low conversion ratios.
Figure 15 shows a conversion from 14 V to 0.3 V at 500 kHz with a TON of about 50 ns.
The on-time is limited by the turn-on and turn-off times of the MOSFETs.
Figure 15.
14 V -> 0.3 V @ 500 kHz, 5 A
50ns
VPHASE
IL
VOUT
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