- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377727 > LTC1044AIS8 (LINEAR TECHNOLOGY CORP) JT 66C 66#22D SKT PLUG PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC1044AIS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | JT 66C 66#22D SKT PLUG |
| 中文描述： | SWITCHED CAPACITOR CONVERTER, PDSO8 |
| 封裝： | PLASTIC, SOIC-8 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 275K |
| 代理商： | LTC1044AIS8 |
7
LTC1044A
Capacitor Selection
External capacitors C1 and C2 are not critical. Matching
is not required, nor do they have to be high quality or
tight tolerance. Aluminum or tantalum electrolytics are
excellent choices with cost and size being the only
consideration.
Negative Voltage Converter
Figure 6 shows a typical connection which will provide a
negative supply from an available positive supply. This
circuit operates over full temperature and power supply
ranges withoutthe need of any external diodes. The LV
pin (pin 6) is shown grounded, but for V
+
≥
3V it may be
“floated”, since LV is internally switched to ground (pin 3)
for V
+
≥
3V.
The output voltage (pin 5) characteristics of the circuit are
those of a nearly ideal voltage source in series with an 80
resistor. The 80
output impedance is composed of two
terms:
1. The equivalent switched-capacitor resistance (see
Theory of Operation).
2. A term related to the on-resistance of the MOS
switches.
At an oscillator frequency of 10kHz and C1 = 10
μ
F, the first
term is:
R
EQUIV
=
=
= 20
1
(f
OSC
/2)
×
C1
1
5
×
10
3
×
10
×
10
–6
Notice that the above equation for R
EQUIV
is nota capaci-
tive reactance equation (X
C
= 1/
ω
C) and does not contain
a 2
π
term.
Figure 6. Negative Voltage Converter
The exact expression for output resistance is extremely
complex, but the dominant effect of the capacitor is clearly
shown on the typical curves of Output Resistance and
Power Efficiency vs Frequency. For C1 = C2 = 10
μ
F, the
output impedance goes from 60
at f
OSC
= 10kHz to 200
at f
OSC
= 1kHz. As the 1/(f
×
C) term becomes large
compared to the switch-on resistance term, the output
resistance is determined by 1/(f
×
C) only.
Voltage Doubling
Figure 7 shows a two-diode capacitive voltage doubler.
With a 5V input, the output is 9.93V with no load and 9.13V
with a 10mA load. With a 10V input, the output is 19.93V
with no load and 19.28V with a 10mA load.
1
2
3
4
8
7
6
5
LTC1044A
V
(1.5V TO 12V)
V
OUT
= 2(V
IN
– 1)
V
d
1N5817
V
1N5817
+
REQUIRED
FOR V
+
< 3V
LTC1044A F07
+
+
+
10
μ
F
10
μ
F
Figure 7. Voltage Doubler
Ultra-Precision Voltage Divider
An ultra-precision voltage divider is shown in Figure 8. To
achieve the 0.0002% accuracy indicated, the load current
should be kept below 100nA. However, with a slight loss
in accuracy the load current can be increased.
Figure 8. Ultra-Precision Voltage Divider
1
2
3
4
8
7
6
5
LTC1044A
V
OUT
= –V
+
REQUIRED FOR V
+
< 3V
V
+
(1.5V TO 12V)
T
MIN
≤
T
A
≤
T
MAX
+
+
10
μ
F
10
μ
F
LTC1044A F06
1
2
3
4
8
7
6
5
LTC1044A
V
+
(3V TO 24V)
+
C1
10
μ
F
V
+
/2 ±0.002%
+
C2
10
μ
F
REQUIRED FOR
V
+
< 6V
LTC1044A F08
T
MIN
≤
T
A
≤
T
MAX
I
L
≤
100nA
U
S
A
O
PPLICATI
U
U
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1045 | Programmable Micropower Hex Translator/ Receiver/Driver(可編程微功耗六級(jí)翻譯器/接收器/驅(qū)動(dòng)器) |
| LTC1046CN8 | “Inductorless” 5V to + 5V Converter |
| LTC1046IS8 | Programmable Logic Controller; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No RoHS Compliant: No |
| LTC1046MJ8 | “Inductorless” 5V to + 5V Converter |
| LTC1046CS8 | “Inductorless” 5V to + 5V Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1044AIS8#PBF | 功能描述:IC REG MULTI CONFIG 20MA 8SOIC 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 |
| LTC1044AIS8#TR | 功能描述:IC REG MULTI CONFIG 20MA 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:- 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 |
| LTC1044AIS8#TRPBF | 功能描述:IC REG MULTI CONFIG 20MA 8SOIC 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 |
| LTC1044AIS8PBF | 制造商:Linear Technology 功能描述:12V CMOS Voltage Converter SOIC8 |
| LTC1044C | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Switched Capacitor Voltage Converter |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。