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| 型号： | MAX660CSA |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/12页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHD CAP DBL INV 8SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 切换式电容器（充电泵），倍增器，反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | -1.5 V ~ -5.5 V，3 V ~ 11 V |
| 输入电压： | 1.5 V ~ 5.5 V |
| 频率 - 开关： | 10kHz，80kHz |
| 电流 - 输出： | 100mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 8-SOIC |
CMOS Monolithic Voltage Converter
______________Detailed Description
The MAX660 capacitive charge-pump circuit either
inverts or doubles the input voltage (see Typical
Operating Circuits ). For highest performance, low
effective series resistance (ESR) capacitors should be
used. See Capacitor Selection section for more details.
When using the inverting mode with a supply voltage
less than 3V, LV must be connected to GND. This
bypasses the internal regulator circuitry and provides
best performance in low-voltage applications. When
using the inverter mode with a supply voltage above
3V, LV may be connected to GND or left open. The part
is typically operated with LV grounded, but since LV
may be left open, the substitution of the MAX660 for the
ICL7660 is simplified. LV must be grounded when over-
driving OSC ( see Changing Oscillator Frequency sec-
tion). Connect LV to OUT (for any supply voltage) when
using the doubling mode.
__________Applications Information
Negative Voltage Converter
The most common application of the MAX660 is as a
one-half of the charge-pump cycle. This introduces a
peak-to-peak ripple of:
V RIPPLE = I OUT + I OUT (ESR C2 )
2(f PUMP ) (C2)
For a nominal f PUMP of 5kHz (one-half the nominal
10kHz oscillator frequency) and C2 = 150μF with an
ESR of 0.2 ? , ripple is approximately 90mV with a
100mA load current. If C2 is raised to 390μF, the ripple
drops to 45mV.
Positive Voltage Doubler
The MAX660 operates in the voltage-doubling mode as
shown in the Typical Operating Circuit. The no-load
output is 2 x V IN .
Other Switched-Capacitor Converters
Please refer to Table 1, which shows Maxim’s charge-
pump offerings.
Changing Oscillator Frequency
Four modes control the MAX660’s clock frequency, as
listed below:
charge-pump voltage inverter. The operating circuit
uses only two external capacitors, C1 and C2 (see
Typical Operating Circuits ).
Even though its output is not actively regulated, the
MAX660 is very insensitive to load current changes. A
typical output source resistance of 6.5 ? means that
with an input of +5V the output voltage is -5V under
FC
Open
FC = V+
Open or
FC = V+
Open
OSC
Open
Open
External
Capacitor
External
Oscillator Frequency
10kHz
80kHz
See Typical Operating
Characteristics
External Clock Frequency
light load, and decreases only to -4.35V with a load of
100mA. Output source resistance vs. temperature and
supply voltage are shown in the Typical Operating
Characteristics graphs.
Output ripple voltage is calculated by noting the output
current supplied is solely from capacitor C2 during
Table 1. Single-Output Charge Pumps
Clock
When FC and OSC are unconnected (open), the oscil-
lator runs at 10kHz typically. When FC is connected to
V+, the charge and discharge current at OSC changes
from 1.0μA to 8.0μA, thus increasing the oscillator
MAX828
MAX829
MAX860
MAX861
MAX660
MAX1044
ICL7662
ICL7660
Package
SOT 23-5
SOT 23-5
SO-8,
μMAX
SO-8,
μMAX
SO-8
SO-8,
μMAX
SO-8
SO-8,
μMAX
Op. Current
(typ, mA)
0.06
0.15
0.2 at 6kHz, 0.3 at 13kHz, 0.12 at 5kHz,
0.6 at 50kHz, 1.1 at 100kHz, 1 at 40kHz
1.4 at 130kHz 2.5 at 250kHz
0.03
0.25
0.08
Output ?
(typ)
Pump Rate
(kHz)
Input (V)
20
12
1.25 to 5.5
20
35
1.25 to 5.5
12
6, 50, 130
1.5 to 5.5
12
13, 100, 150
1.5 to 5.5
6.5
5, 40
1.5 to 5.5
6.5
5
1.5 to 10
125
10
1.5 to 10
55
10
1.5 to 10
6
_______________________________________________________________________________________
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| MAX660CSA+ | 功能描述:电荷泵 CMOS Monolithic Voltage Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX660CSA+T | 功能描述:电荷泵 CMOS Monolithic Voltage Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX660CSA+TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX660CSA-T | 功能描述:电荷泵 CMOS Monolithic Voltage Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX660EPA | 功能描述:电荷泵 CMOS Monolithic Voltage Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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