參數(shù)資料
型號: MAX1720EUTG
廠商: ON SEMICONDUCTOR
元件分類: 穩(wěn)壓器
英文描述: Switched Capacitor Voltage Inverter with Shutdown
中文描述: SWITCHED CAPACITOR CONVERTER, 21 kHz SWITCHING FREQ-MAX, PDSO6
封裝: LEAD FREE, TSOP-6
文件頁數(shù): 17/18頁
文件大?。?/td> 191K
代理商: MAX1720EUTG
MAX1720
http://onsemi.com
17
All of the previously shown converter circuits have only single outputs. Applications requiring multiple outputs can be
constructed by incorporating combinations of the former circuits. The converter shown above combines Figures 26 and 32 to
form a regulated negative output inverter with a nonregulated positive output doubler. The magnitude of V
out
is controlled
by the resistor values and follows the relationship V
ref
(R
2
/R
1
+ 1). Since the positive output is not within the feedback loop,
its output voltage will increase as the negative output load increases. This cross regulation characteristic is shown in the upper
portion of Figure 50. The dashed line is the open loop and the solid line is the closed loop configuration for the load regulation.
The load regulation for the positive doubler with a constant load on the V
out
is shown in Figure 51.
4.0
5.0
3.0
8.0
9.0
I
out
, NEGATIVE INVERTER OUTPUT CURRENT (mA)
Figure 50. Load Regulation, Output
Voltage vs. Output Current
V
o
,
0
20
10
30
8.0
7.0
9.0
10.0
I
out
, POSITIVE DOUBLER OUTPUT CURRENT (mA)
Figure 51. Load Regulation, Output
Voltage vs. Output Current
V
o
,
0
30
20
10
50
R
1
= 10 k
R
2
= 20 k
T
A
= 25
°
C
40
Negative Inverter I
out
= 15 mA
Negative Inverter
Positive Doubler
I
out
= 15 mA
R
out
= 45 Open Loop
R
out
= 2 Closed Loop
R1 = 10 k, R2 = 20 k
T
A
= 25
°
C
Figure 52. Inverter Circuit Board Layout, Top View Copper Side
V
in
GND
IC1
C
1
Inverter Size = 0.5 in x 0.2 in
Area = 0.10 in
2
, 64.5 mm
2
V
out
GND
C
3
+
C
2
+
SHDN
+
0.5
TAPING FORM
PIN 1
USER DIRECTION OF FEED
Component Taping Orientation for TSOP6 Devices
Standard Reel Component Orientation
(Mark Right Side Up)
DEVICE
MARKING
TSOP6
Package
Tape Width (W)
Pitch (P)
Part Per Full Reel
Diameter
8 mm
4 mm
3000
7 inches
Tape & Reel Specifications Table
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