L6983 datasheet(19/63 Pages) STMICROELECTRONICS

部件名	L6983

功能描述	38 V, 3 A synchronous step-down converter with 17 μA quiescent current

PDF	63 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

19 / 63 page

6.4.3

Efficiency for low consumption mode and low noise mode part number

Figure 14. Light-load efficiency for low consumption mode and low noise mode - linear scale, and

Figure 15. Light-load efficiency for low consumption mode and low noise mode - log scale report the efficiency

measurements to highlight the gap at the light-load between LNM and LCM part numbers. The graph reports also

exactly the same efficiency at the medium / high load.

Figure 14. Light-load efficiency for low consumption mode and low noise mode - linear scale

100

0.5

1.5

2.5

IOUT [A]

VIN = 24 V; VOUT = 5 V; FSW = 0.4 MHz

LCM

LNM

Figure 15. Light-load efficiency for low consumption mode and low noise mode - log scale

100

0.001

0.01

0.1

IOUT [A]

VIN = 24 V; VOUT = 5 V; FSW = 0.4 MHz

LCM

LNM

L6983

Light-load operation

DS13116 - Rev 1

page 19/63

L6983 数据表(PDF) 19 Page - STMicroelectronics