参数资料
型号: LTC5583IUF#PBF
厂商: LINEAR TECHNOLOGY CORP
元件分类: 电源管理
英文描述: 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC24
封装: 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD-X, QFN-24
文件页数: 16/28页
文件大小: 1136K
代理商: LTC5583IUF#PBF
LTC5583
23
5583fa
The temperature coefficients TC1 and TC2 are shown as
functions of the tuning resistors RT1 and RT2 in Figure 10
and Figure 11.
APPLICATIONS INFORMATION
RT1 (kΩ)
5
TC1
(mV
/°C)
detV1
(mV)
1.6
1.2
0.4
0.8
0
–0.4
–0.8
–1.2
–1.6
40
30
10
0
20
–10
–20
–30
–40
5583 F10
35
20
15
30
25
10
RP1 = 0
RP1 = 0PEN
detV1
TC1
Figure 10. First Order Temperature Compensation
Coefficient TC1 vs External RT1 Value
Figure 11. Second Order Temperature Compensation
Coefficient TC2 vs External RT2 Value
RT2 (kΩ)
0
TC2
V
/°C
2 )
detV2
(mV)
16
12
4
8
0
–4
–8
–12
–16
200
150
50
0
100
–50
–100
–150
–200
5583 F11
10
7
29
8
56
14
3
RP2 = OPEN
RP2 = 0
detV2
TC2
When pins RT1 and RT2 are shorted to ground, the tem-
perature compensation circuit is disabled automatically.
Polarity of the temperature coefficient TC1 (or TC2), can
be selected by either shorting the RP1 pin (or RP2 pin)
to ground or leaving it open, while the coefficients’ values
can be controlled by external resistors RT1 and RT2 inde-
pendently, according to Figures 10 and 11. At a given RF
frequency, the polarities and optimal values of TC1 and TC2
can be chosen to ensure a stable output over the operating
temperature range. Table 2 lists the suggested RP1, RP2,
RT1 and RT2 values at various RF frequencies for the best
output performance over temperature.
Table 2. Suggested RP and RT Values for Optimal Temperature
Performance vs RF Frequency
Frequency (MHz)
RP1
RT1 (kΩ)
RP2
RT2 (kΩ)
450
Open
11.5
0
1.13
880
Open
11.5
0
1.13
2140
Open
9.76
0
1.10
2700
Open
8.87
0
1.21
3600
Open
10.2
0
1.65
5800
Open
10.0
0
1.47
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