- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385507 > LTC660 (Linear Technology Corporation) 100mA CMOS Voltage Converter PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC660 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 100mA CMOS Voltage Converter |
| 中文描述： | 100mA的CMOS電壓轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 262K |
| 代理商： | LTC660 |
8
LTC660
TYPICAL APPLICATIO
S
N
Negative Voltage Converter
Figure 7 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 without the 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.
U
Voltage Doubling
Figure 8 shows the LTC660 operating in the voltage
doubling mode. The external Schottky (1N5817) diode is
for start-up only. The output voltage is 2 V
IN
without a
load. The diode has no effect on the output voltage.
1
2
3
4
8
7
6
5
BOOST
CAP
+
GND
CAP
–
LTC660 F08
C1
150
μ
F
V
OUT
= 2V
IN
V
IN
2.5V
TO 5.5V
LTC660
1N5817*
V
+
OSC
LV
V
OUT
C2
150
μ
F
* SCHOTTKY DIODE IS FOR START-UP ONLY
+
+
Figure 8. Voltage Doubler
The output voltage (Pin 5) characteristics of the circuit are
those of a nearly ideal voltage source in series with a 6.5
resistor. The 6.5
output impedance is composed of two
terms: 1) the equivalent switched-capacitor resistance
(see Theory of Operation), and 2) a term related to the on-
resistance of the MOS switches.
At an oscillator frequency of 10kHz and C1 = 150
μ
F, the
first term is:
R
=
1
f
/2
EQUIV
OSC
1
150 10
(
)
=
=
C1
5 10
1 3
.
3
6
–
.
Notice that the equation for R
EQUIV
is not a capacitive
reactance equation (X
C
= 1/
ω
C) and does not contain a
2
π
term.
The exact expression for output impedance is complex,
but the dominant effect of the capacitor is clearly shown on
the typical curves of output impedance and power effi-
ciency versus frequency. For C1 = C2 = 150
μ
F, the output
impedance goes from 6.5
at f
OSC
= 10kHz to 110
at
f
OSC
= 100Hz. As the 1/fC term becomes large compared
to the switch on-resistance term, the output resistance is
determined by 1/fC only.
Ultraprecision Voltage Divider
An ultraprecision voltage divider is shown in Figure 9. To
achieve the 0.002% accuracy indicated, the load current
should be kept below 100nA. However, with a slight loss
in accuracy, the load current can be increased.
1
2
3
4
8
7
6
5
BOOST
CAP
+
GND
CAP
–
C2
150
μ
F
LTC660 F07
C1
150
μ
F
V
OUT
= –V
IN
V
1.5V TO 5.5V
LTC660
V
+
OSC
LV
V
OUT
+
+
Figure 7. Voltage Inverter
Battery Splitter
A common need in many systems is to obtain positive and
negative supplies from a single battery or single power
supply system. Where current requirements are small, the
circuit shown in Figure 10 is a simple solution. It provides
symmetrical positive or negative output voltages, both
equal to one-half the input voltage. The output voltages are
both referenced to Pin 3 (Output Common).
Figure 9. Ultraprecision Voltage Divider
8
7
6
5
4
3
2
1
C1
150
μ
F
±
0.002%
V
+
3V TO 11V
LTC660 F09
T
MIN
≤
T
A
≤
T
I
L
≤
100nA
C2
150
μ
F
2
V
+
LTC660
+
+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC660CN8 | 100mA CMOS Voltage Converter |
| LTC660CS8 | 100mA CMOS Voltage Converter |
| LTFD101-1 | LTFD 101 Series Telecommunications Disconnect Switch |
| LTFD101-2 | LTFD 101 Series Telecommunications Disconnect Switch |
| LTFD101-3 | LTFD 101 Series Telecommunications Disconnect Switch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC6601-1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Noise, 0.5% Tolerance, 5MHz to 28MHz, Pin Confi gurable Filter/ADC Driver |
| LTC6601-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Power, Low Distortion, 5MHz to 27MHz, Pin Confi gurable Filter/ADC Driver |
| LTC6601CUF-1#PBF | 功能描述:IC DRVR FILTER/ADC LN 20-QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類型:連續(xù)時(shí)間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC6601CUF-1#TRPBF | 功能描述:IC DRVR FILTER/ADC LN 20-QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類型:連續(xù)時(shí)間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC6601CUF-1-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Noise, 0.5% Tolerance, 5MHz to 28MHz, Pin Confi gurable Filter/ADC Driver |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。