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ICL7660ACPAZ PDF预览

ICL7660ACPAZ

更新时间： 2024-01-09 19:00:12
品牌 Logo 应用领域
英特矽尔 - INTERSIL 转换器光电二极管
页数 文件大小 规格书
11页 275K
描述
CMOS Voltage Converters

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ICL7660ACPAZ 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：, CAN8,.2Reach Compliance Code：unknown
风险等级：5.92JESD-30 代码：O-MBCY-W8
JESD-609代码：e0端子数量：8
最高工作温度：125 °C最低工作温度：-55 °C
封装主体材料：METAL封装等效代码：CAN8,.2
封装形状：ROUND封装形式：CYLINDRICAL
认证状态：Not Qualified筛选级别：MIL-STD-883 Class B (Modified)
子类别：Other Analog ICs技术：CMOS
温度等级：MILITARY端子面层：Tin/Lead (Sn/Pb)
端子形式：WIRE端子位置：BOTTOM
Base Number Matches：1

ICL7660ACPAZ 数据手册

 浏览型号ICL7660ACPAZ的Datasheet PDF文件第4页浏览型号ICL7660ACPAZ的Datasheet PDF文件第5页浏览型号ICL7660ACPAZ的Datasheet PDF文件第6页浏览型号ICL7660ACPAZ的Datasheet PDF文件第8页浏览型号ICL7660ACPAZ的Datasheet PDF文件第9页浏览型号ICL7660ACPAZ的Datasheet PDF文件第10页 
ICL7660, ICL7660A  
The voltage regulator portion of the ICL7660 and ICL7660A is  
ENERGY IS LOST ONLY IN THE TRANSFER OF  
CHARGE BETWEEN CAPACITORS IF A CHANGE IN  
VOLTAGE OCCURS. The energy lost is defined by:  
an integral part of the anti-latchup circuitry, however its inherent  
voltage drop can degrade operation at low voltages. Therefore,  
to improve low voltage operation the “LV” pin should be  
connected to GROUND, disabling the regulator. For supply  
voltages greater than 3.5V the LV terminal must be left open to  
insure latchup proof operation, and prevent device damage.  
1
2
2
E = / C (V - V )  
2
2
1
1
where V and V are the voltages on C during the pump and  
1
2
1
1
transfer cycles. If the impedances of C and C are relatively  
2
high at the pump frequency (refer to Figure 12) compared to  
the value of R , there will be a substantial difference in the  
8
S
2
S
1
2
L
V
IN  
voltages V and V . Therefore it is not only desirable to make  
1
2
C
C as large as possible to eliminate output voltage ripple, but  
1
2
3
3
5
also to employ a correspondingly large value for C in order to  
1
achieve maximum efficiency of operation.  
C
2
S
S
4
3
Do’s And Don’ts  
1. Do not exceed maximum supply voltages.  
V
= -V  
IN  
OUT  
2. Do not connect LV terminal to GROUND for supply  
7
voltages greater than 3.5V.  
FIGURE 12. IDEALIZED NEGATIVE VOLTAGE CONVERTER  
3. Do not short circuit the output to V+ supply for supply  
voltages above 5.5V for extended periods, however,  
transient conditions including start-up are okay.  
Theoretical Power Efficiency  
Cons iderations  
4. When using polarized capacitors, the + terminal of C  
1
must be connected to pin 2 of the ICL7660 and ICL7660A  
In theory a voltage converter can approach 100% efficiency  
if certain conditions are met.  
and the + terminal of C must be connected to GROUND.  
2
5. If the voltage supply driving the ICL7660 and ICL7660A  
has a large source impedance (25Ω - 30Ω), then a 2.2µF  
capacitor from pin 8 to ground may be required to limit  
rate of rise of input voltage to less than 2V/µs.  
1. The driver circuitry consumes minimal power.  
2. The output switches have extremely low ON resistance  
and virtually no offset.  
6. User should insure that the output (pin 5) does not go  
more positive than GND (pin 3). Device latch up will occur  
under these conditions. A 1N914 or similar diode placed  
3. The impedances of the pump and reservoir capacitors  
are negligible at the pump frequency.  
The ICL7660 and ICL7660A approach these conditions for  
negative voltage conversion if large values of C and C  
in parallel with C will prevent the device from latching up  
2
under these conditions. (Anode pin 5, Cathode pin 3).  
1
2
are used.  
V+  
1
2
3
4
8
7
6
5
R
O
V
OUT  
ICL7660  
ICL7660A  
+
10µF  
-
-
V+  
+
V
= -V+  
OUT  
-
10µF  
+
FIGURE 13A. CONFIGURATION  
FIGURE 13B. THEVENIN EQUIVALENT  
FIGURE 13. SIMPLE NEGATIVE CONVERTER  
FN3072.7  
7
October 10, 2005  
1...4567891011

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