- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377698 > LT1317B (Linear Technology Corporation) 8-Bit Identity/Magnitude Comparators (P=Q) with Enable 20-PDIP 0 to 70 PDF資料下載
參數(shù)資料
| 型號： | LT1317B |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 8-Bit Identity/Magnitude Comparators (P=Q) with Enable 20-PDIP 0 to 70 |
| 中文描述： | 微功耗，600kHz的PWM型DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大小： | 447K |
| 代理商： | LT1317B |
10
LT1317/LT1317B
FREQUENCY COMPENSATION
The LT1317 has an external compensation pin (V
C
) which
allows the frequency response to be optimized for the
circuit configuration. In most cases, the values used in
Figure 1 will work. Some circuits may need additional
compensation and a simple trial and error method for
determining the necessary component values is given.
Figure 6 shows the test setup. A load step is applied and
the resulting output voltage waveform is observed. Fig-
ures 7 through 10 detail the response for various values of
R and C in the compensation network. The circuit of
Figure 7 starts with a large C and small R giving a highly
overdamped system. This system will always be stable but
the output voltage displays a long settling time of >5ms.
Figure 8’s circuit has reduced C giving a shorter settling
time but still overdamped. Figure 9 shows the results
when C is reduced to the point where the system becomes
underdamped. The output voltage responds quickly
(
≈
200
μ
s to 300
μ
s) but some ringing exists. Figure 10 has
APPLICATIO
S I
N
FOR
ATIO
U
W
U
optimum R and C values giving the best possible settling
time with adequate phase margin.
An additional 100pF capacitor (C
C2
) is connected to the V
C
pin and is necessary if the LT1317 is operated near current
limit. Also, C
C2
should be present when higher ESR output
capacitors are used.
Figure 6. Frequency Response Test Setup
V
IN
SW
FB
LT1317
10
μ
H
MBR0520L
SHDN
R
604k
50
V
OUT
3.3V
1M
15
2W
C
C
100pF
1317 F06
V
C
GND
V
IN
2V
47
μ
F
47
μ
F
+
+
1ms/DIV
1317 F09
I
LOAD
2mA TO
200mA
V
OUT
100mV/DIV
AC COUPLED
1ms/DIV
1317 F10
I
LOAD
2mA TO
200mA
V
OUT
100mV/DIV
AC COUPLED
5ms/DIV
1317 F07
I
LOAD
2mA TO
200mA
V
OUT
100mV/DIV
AC COUPLED
5ms/DIV
1317 F08
I
LOAD
2mA TO
200mA
V
OUT
100mV/DIV
AC COUPLED
Figure 8. Reducing C to 22nF
Speeds Up the Response. (R = 33k)
Figure 10. 3.3nF and 33k Gives the
Shortest Settling Time with No Ringing.
Figure 9. Using 680pF for C Results in an
Underdamped System with Ringing. (R = 33k)
Figure 7. With C = 56nF and R = 33k,
the System is Highly Overdamped.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1317BCS8 | 8-Bit Identity/Magnitude Comparators (P=Q) with Enable 20-SO 0 to 70 |
| LT1317CMS8 | 8-Bit Identity/Magnitude Comparators (P=Q) with Enable 20-SO 0 to 70 |
| LT1317CS8 | Micropower, 600kHz PWM DC/DC Converters |
| LT1328CMS8 | 4Mbps IrDA Infrared Receiver |
| LT1328CS8 | FASTENERS, TIES CABLE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1317BCMS8 | 功能描述:IC REG BOOST ADJ 0.5A 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT1317BCMS8#PBF | 功能描述:IC REG BOOST ADJ 0.5A 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LT1317BCMS8#TR | 功能描述:IC REG BOOST ADJ 0.5A 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT1317BCMS8#TRPBF | 功能描述:IC REG BOOST ADJ 0.5A 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT1317BCS8 | 功能描述:IC REG BOOST ADJ 0.5A 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:MIC23xxx HyperLight Load™ Regulators 標(biāo)準(zhǔn)包裝:5,000 系列:HyperLight Load® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.8V 輸入電壓:2.7 V ~ 5.5 V PWM 型:混合物 頻率 - 開關(guān):4MHz 電流 - 輸出:2A 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤，8-MLF? 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-MLF?（2x2） 產(chǎn)品目錄頁面:1094 (CN2011-ZH PDF) 其它名稱:576-3303-2 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。