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| 型号： | MAX860CSA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/11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： | 2,500 |
| 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： | 6kHz，50kHz，130kHz |
| 电流 - 输出： | 50mA |
| 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： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
MAX860/MAX861
50mA, Frequency-Selectable,
Switched-Capacitor Voltage Converters
Table 2. Switching-Frequency Trade-Offs
A typical design procedure is as follows:
1) Choose C1 and C2 to be the same, for convenience.
ATTRIBUTE
Output Ripple
C1, C2 Values
Supply Current
LOWER
FREQUENCY
Larger
Larger
Smaller
HIGHER
FREQUENCY
Smaller
Smaller
Larger
2) Select f S :
a) If you want to avoid a specific noise frequency,
choose f S appropriately.
b) If you want to minimize capacitor cost and size,
choose a high f S .
__________Applications Information
Capacitor Selection
The MAX860/MAX861 are tested using 10μF capacitors
for both C1 and C2, although smaller or larger values
can be used (Table 3). Smaller C1 values increase the
output resistance; larger values reduce the output
resistance. Above a certain point, increasing the
capacitance of C1 has a negligible effect (because the
c) If you want to minimize current consumption,
choose a low f S .
3) Choose a capacitor based on Table 3, although
higher or lower values can be used to optimize per-
formance. Table 4 lists manufacturers who provide
low-ESR capacitors.
Table 3. Suggested Capacitor Values*
output resistance becomes dominated by the internal
switch resistance and the capacitor ESR). Low-ESR
capacitors provide the lowest output resistance and
ripple voltage. The output resistance of the entire circuit
(inverter or doubler) is approximately:
R OUT = R O + 4 x ESR C1 + ESR C2 + 1 / (f S x C1)
where R O (the effective resistance of the MAX860/
MAX861’s internal switches) is approximately 8 Ω and f S
is the switching frequency. R OUT is typically 12 Ω when
using capacitors with 0.2 Ω ESR and f S , C1, and C2 val-
NOMINAL FREQUENCY (kHz)
6
13
50
100
130
250
C1, C2 (μF)
68
47
10
4.7
4.7
2.2
ues suggested in Table 3. When C1 and C2 are so
large (or the switching frequency is so high) that the
internal switch resistance dominates the output resis-
tance, estimate the output resistance as follows:
R OUT = R O + 4 x ESR C1 + ESR C2
*In addition to Table 3, four graphs in the Typical
Operating Characteristics section show typical output
current for C1 and C2 capacitances ranging from
0.33μF to 22μF. Output current is plotted for inputs of
4.5V (5V - 10%) and 3.0V (3.3V - 10%), and also for
10% and 20% output droop from the ideal -V IN value.
Table 4. Low-ESR Capacitor Manufacturers
MANUFACTURER–Series
AVX TPS Series
AVX TAG Series
Matsuo 267 Series
Sprague 595 Series
Sanyo MV-GX Series
Sanyo CV-GX Series
Nichicon PL Series
United Chemicon (Marcon)
TDK
Maxim Integrated
PHONE
(803) 946-0629
(803) 946-0629
(714) 969-2491
(603) 224-1961
(619) 661-6835
(619) 661-6835
(847) 843-7500
(847) 696-2000
(847) 390-4461
FAX
(803) 626-3123
(803) 626-3123
(714) 960-6492
(613) 224-1430
(619) 661-1055
(619) 661-1055
(847) 843-2798
(847) 696-9278
(847) 390-4405
COMMENTS
Low-ESR tantalum, SMT
Low-cost tantalum, SMT
Low-cost tantalum, SMT
Low-ESR tantalum, SMT
Aluminum electrolytic, through hole
Aluminum electrolytic, SMT
Aluminum electrolytic, through hole
Ceramic SMT
Ceramic SMT
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX860CUA | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX860CUA+ | 功能描述:直流/直流开关转换器 50mA Frequency-Selectable Switched-Capacitor Voltage Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX860CUA+T | 功能描述:直流/直流开关转换器 50mA Frequency-Selectable Switched-Capacitor Voltage Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX860CUA-T | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX860ESA | 功能描述:电荷泵 50mA f-Selectable 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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