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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)： | 1/12頁(yè) |
| 文件大?。?/td> | 262K |
| 代理商： | LTC660 |
1
LTC660
100mA CMOS
Voltage Converter
TYPICAL APPLICATIO
N
U
I
Simple Conversion of 5V to –5V Supply
I
Output Drive: 100mA
I
R
OUT
: 6.5
(0.65V Loss at 100mA)
I
BOOST Pin (Pin 1) for Higher Switching Frequency
I
Inverting and Doubling Modes
I
Minimum Open Circuit Voltage Conversion
Efficiency: 99%
I
Typical Power Conversion Efficiency
with a 100mA Load: 88%
I
Easy to Use
APPLICATIO
S
U
The LTC
660 is a monolithic CMOS switched-capacitor
voltage converter. It performs supply voltage conversion
from positive to negative from an input range of 1.5V to
5.5V, resulting in complementary output voltages of
–1.5V to –5.5V. It also performs a doubling at an input
voltage range of 2.5V to 5.5V, resulting in a doubled
output voltage of 5V to 11V. Only two external capacitors
are needed for the charge pump and charge reservoir
functions.
The converter has an internal oscillator that can be
overdriven by an external clock or slowed down when
connected to a capacitor. The oscillator runs at a 10kHz
frequency when unloaded. A higher frequency outside the
audio band can also be obtained if the BOOST pin is tied
to V
+
.
The LTC660 contains an internal oscillator, divide-by-two,
voltage level shifter and four power MOSFETs.
I
Conversion of 5V to
±
5V Supplies
I
Inexpensive Negative Supplies
I
Data Acquisition Systems
I
High Current Upgrade to LTC1044 or LTC7660
FEATURES
DESCRIPTIO
N
U
Output Voltage vs
Load Current for V
+
= 5V
LOAD CURRENT (mA)
0
O
–5.0
–4.8
–4.6
–4.4
–4.2
–4.0
80
660 TA02
20
40
60
100
T
A
= 25
°
C
R
OUT
= 6.5
, LTC and LT are registered trademarks of Linear Technology Corporation.
Generating –5V from 5V
1
2
3
4
8
7
6
5
BOOST
CAP
+
GND
CAP
–
C2
150
μ
F
660 TA01
C1
150
μ
F
–5V
OUTPUT
5V INPUT
LTC660
V
+
OSC
LV
V
OUT
+
+
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