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參數(shù)資料
| 型號： | LTC1429 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Clock-Synchronized Switched Capacitor Regulated Voltage Inverter |
| 中文描述： | 時鐘同步開關(guān)電容穩(wěn)壓電壓逆變器 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大小： | 275K |
| 代理商： | LTC1429 |
4
LTC1429
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
(See Test Circuits: Figure 1 for Doubler Mode, Figure 2 for Tripler Mode)
Supply Current vs Supply Voltage
Supply Current vs Temperature
TEMPERATURE (C)
0
S
μ
A
700
30
LTC1429 TPC05
400
200
10
20
40
100
0
800
600
500
300
50
60
70
V
= 5V
DOUBLER MODE
V
= 3.3V
TRIPLER MODE
V
OUT
= –4V
SUPPLY VOLTAGE (V)
3.0
S
μ
A
600
800
1000
900
700
500
300
100
7.0
LTC1429 TPC04
400
200
0
4.0
3.5
4.5
5.5
6.5
7.5
5.0
6.0
8.0
V
OUT
= –4V
T
A
°
C
TRIPLER MODE
DOUBLER MODE
PI
FU
CTIO
N
S
U
U
Pin numbers are shown as (LTC1429CS/LTC1429CS8).
NC (Pin 1/NA):
No Internal Connection.
C1
+
(Pin 2/Pin 2):
C1 Positive Input. Connect an 0.1
μ
F
capacitor between C1
+
and C1
–
. With the LTC1429CS in
doubler mode, connect a 0.1
μ
F capacitor from C1
+
to C2
–
.
C1
–
(Pin 3/Pin 3):
C1 Negative Input. Connect a 0.1
μ
F
capacitor from C1
+
to C1
–
. With the LTC1429CS in doubler
mode only, C1
–
should float.
C2
+
(Pin 4/NA):
C2 Positive Input. In tripler mode, connect
a 0.1
μ
F capacitor from C2
+
to C2
–
. This pin is used with
the LTC1429CS in tripler mode only; in doubler mode, this
pin should float.
C2
–
(Pin 5/NA):
C2 Negative Input. In tripler mode, con-
nect a 0.1
μ
F capacitor from C2
+
to C2
–
. In doubler mode,
connect a 0.1
μ
F capacitor from C1
+
to C2
–
.
GND (Pin 6/Pin 4):
Ground. Connect to a low-impedance
ground. A ground plane will help to minimize regulation
errors.
R0 (Pin 7/NA):
Internal Resistor String-1st Tap. See Table
3 in the Applications Information section for information
on internal resistor string pin connections vs output
voltage.
R1 (Pin 8/NA):
Internal Resistor String-2nd Tap.
R
ADJ
(Pin 9/NA):
Internal Resistor String Output. Connect
this pin to ADJ to use the internal resistor divider. See
Table 3 in the Applications Information section for infor-
mation on internal resistor string pin connections vs
output voltage.
ADJ (COMP for fixed output versions) (Pin 10/Pin 5):
Output Adjust/Compensation. For adjustable parts, this
pin is used to set the output voltage. The output voltage
should be divided down with a resistor divider and fed
back to this pin to set the regulated output voltage. The
resistor divider can be external or the internal divider
string can be used if it can provide the required output
voltage. Typically the resistor string should draw
≥
10
μ
A
from the output to minimize errors due to the bias current
at the adjust pin. Fixed output parts have the internal
resistor string connected to this pin inside the package;
the pin can be used to trim the output voltage if desired. It
can also be used as an optional feedback compensation
pin to reduce output ripple on both adjustable and fixed
output voltage parts. See the Applications Information
section for more on compensation and output ripple.
OUT (Pin 11/Pin 6):
Negative Voltage Output. This pin
must be bypassed to ground with a 1.0
μ
F or larger
capacitor; it must be at least 3.3
μ
F to provide specified
output ripple. The size of the output capacitor has a strong
INPUT FREQUENCY (kHz)
100
S
μ
A
750
700
650
600
550
500
450
1000
2000
4000
LTC1429 TPC06
T
A
= 25
°
C
I
LOAD
= 0mA
DOUBLER MODE
V
CC
= 5V
TRIPLER MODE
V
CC
= 3.3V
Supply Current vs
Input Frequency
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