參數(shù)資料
型號: LTC1046IS8
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Programmable Logic Controller; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No RoHS Compliant: No
中文描述: 0.05 A SWITCHED CAPACITOR CONVERTER, 30 kHz SWITCHING FREQ-MAX, PDSO8
封裝: PLASTIC, SOIC-8
文件頁數(shù): 4/12頁
文件大?。?/td> 172K
代理商: LTC1046IS8
LTC1046
4
AMBIENT TEMPERATURE (
°
C)
–55
26
O
O
30
32
34
36
38
40
25
50
100
125
1046 G11
28
–25
0
75
V
+
= 5V
C
OSC
= 0pF
AMBIENT TEMPERATURE (
°
C)
0
1
O
O
10
100
1
4
5
7
1046 G10
2
3
6
T
A
= 25
°
C
C
OSC
= 0pF
C
HARA TERISTICS
U
A
TYPICAL PERFOR
CE
TEST CIRCUIT
Figure 1
U
S
A
Theory of Operation
O
PPLICATI
U
U
To understand the theory of operation of the LTC1046, a
review of a basic switched capacitor building block is
helpful.
In Figure 2, when the switch is in the left position, capacitor
C1 will charge to voltage V1. The total charge on C1 will be
q1 = C1V1. The switch then moves to the right, discharg-
ing C1 to voltage V2. After this discharge time, the charge
on C1 is q2 = C1V2. Note that charge has been transferred
from the source, V1, to the output, V2. The amount of
charge transferred is:
q = q1 – q2 = C1(V1 – V2).
If the switch is cycled “f” times per second, the charge
transfer per unit time (i.e., current) is:
I = f
q = f C1(V1 – V2).
Figure 2. Switched Capacitor Building Block
Oscillator Frequency as a
Function of Supply Voltage
Oscillator Frequency vs
Temperature
(Using Test Circuit in Figure 1)
C
OSC
EXTERNAL
OSCILLATOR
C2
10
μ
F
V
OUT
V
+
(5V)
R
L
I
S
I
L
1046 F01
1
2
3
4
8
7
6
5
V
+
OSC
LV
V
OUT
BOOST
CAP
+
GND
CAP
LTC1046
C1
10
μ
F
+
+
C1
f
C2
1046 F02
V2
V1
R
L
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