參數(shù)資料
型號: LM2599T-ADJ
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator, with Features
中文描述: 7.5 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PZFM7
封裝: TO-220, 7 PIN
文件頁數(shù): 28/31頁
文件大小: 812K
代理商: LM2599T-ADJ
Application Information
(Continued)
quirement however, that there be a minimum load of 1.2A on
the regulated positive output for the charge pump to work
correctly. Also, resistor R1 is required to limit the charging
current of C1 to some value less than the LM2599 current
limit (typically 4.5A).
This method of generating a negative output voltage without
an additional inductor can be used with other members of
the Simple Switcher Family, using either the buck or boost
topology.
TYPICAL THROUGH HOLE PC BOARD LAYOUT, FIXED OUTPUT (1X SIZE), DOUBLE SIDED
DS012582-48
FIGURE 31. Charge Pump for Generating a
Low Current, Negative Output Voltage
DS012582-51
C
IN
:
C
OUT
:
D1:
L1:
R
PULL UP
:
C
DELAY
:
C
SD/SS
:
Thermalloy Heat Sink
#
7020
— 470 μF, 50V, Aluminum Electrolytic Panasonic, “HFQ Series”
— 330 μF, 35V, Aluminum Electrolytic Panasonic, “HFQ Series”
— 5A, 40V Schottky Rectifier, 1N5825
— 47 μH, L39, Renco, Through Hole
— 10k
— 0.1 μF
— 0.1 μF
L
www.national.com
28
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