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参数资料
| 型号： | LTC3200EMS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP DBL 8MSOP |
| 标准包装： | 2,500 |
| 类型： | 切换式电容器（充电泵），倍增器 |
| 输出数： | 1 |
| 输入电压： | 2.7 V ~ 4.5 V |
| 频率 - 开关： | 2MHz |
| 电流 - 输出： | 100mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-MSOP |
LTC3200/LTC3200-5
OPERATIO
LTC3200/LTC3200-5 will be relatively constant while the
charge pump is on either the input charging phase or the
output charging phase but will drop to zero during the
R OL ( MIN ) ≡
2 V IN – V OUT
I OUT
?
1
f OSC C FLY
clock nonoverlap times. Since the nonoverlap time is
small (~25ns), these missing “notches” will result in only
a small perturbation on the input power supply line. Note
that a higher ESR capacitor such as tantalum will have
higher input noise due to the input current change times
the ESR. Therefore ceramic capacitors are again recom-
mended for their exceptional ESR performance.
Further input noise reduction can be achieved by powering
the LTC3200/LTC3200-5 through a very small series in-
ductor as shown in Figure 4. A 10nH inductor will reject the
fast current notches, thereby presenting a nearly constant
current load to the input power supply. For economy the
10nH inductor can be fabricated on the PC board with
about 1cm (0.4") of PC board trace.
Where f OSC is the switching frequency (2MHz typ) and
C FLY is the value of the flying capacitor. The charge pump
will typically be weaker than the theoretical limit due to
additional switch resistance, however for very light load
applications the above expression can be used as a guide-
line in determining a starting capacitor value.
Ceramic Capacitors
Ceramic capacitors of different materials lose their capaci-
tance with higher temperature and voltage at different
rates. For example, a capacitor made of X5R or X7R
material will retain most of its capacitance from – 40 ° C to
85 ° C whereas a Z5U or Y5V style capacitor will lose
considerable capacitance over that range. Z5U and Y5V
capacitors may also have a very poor voltage coefficient
V IN
10nH
0.22 μ F
1 μ F
V IN
LTC3200/
LTC3200-5
causing them to lose 60% or more of their capacitance
when the rated voltage is applied. Therefore, when com-
paring different capacitors it is often more appropriate to
GND
compare the amount of achievable capacitance for a given
case size rather than discussing the specified capacitance
Figure 4. 10nH Inductor Used for
Additional Input Noise Reduction
32005 F02
value. For example, over rated voltage and temperature
conditions, a 1 μ F, 10V, Y5V ceramic capacitor in an 0603
case may not provide any more capacitance than a
0.22 μ F, 10V, X7R available in the same 0603 case. In fact
Flying Capacitor Selection
Warning: A polarized capacitor such as tantalum or
aluminum should never be used for the flying capacitor
since its voltage can reverse upon start-up of the LTC3200/
LTC3200-5. Low ESR ceramic capacitors should always
be used for the flying capacitor.
The flying capacitor controls the strength of the charge
for most LTC3200/LTC3200-5 applications these capaci-
tors can be considered roughly equivalent . The capacitor
manufacturer’s data sheet should be consulted to deter-
mine what value of capacitor is needed to ensure the
desired capacitance at all temperatures and voltages.
Below is a list of ceramic capacitor manufacturers and
how to contact them:
pump. In order to achieve the rated output current it is
necessary to have at least 0.68 μ F of capacitance for the
flying capacitor.
For very light load applications the flying capacitor may be
reduced to save space or cost. The theoretical minimum
output resistance of a voltage doubling charge pump is
given by:
8
AVX
Kemet
Murata
Taiyo Yuden
Vishay
www.avxcorp.com
www.kemet.com
www.murata.com
www.t-yuden.com
www.vishay.com
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| LTC3200ES6-5 | 制造商:Linear Technology 功能描述:Charge Pump STPUP 5V 100mA 6-Pin TSOT-23 |
| LTC3200ES6-5#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER 2MHZ 5V 100 制造商:Linear Technology 功能描述:DC-DC CONVERTER, 2MHZ, 5V, 100mA, SOT-23-6; Primary Input Voltage:4.5V; No. of Outputs:1; Output Voltage:5V; Output Current:100mA; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C ;RoHS Compliant: Yes |
| LTC3200ES6-5#TR | 功能描述:IC REG SWITCHED CAP DBL SOT23-6 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
| LTC3200ES6-5#TRM | 功能描述:IC REG SWITCHED CAP DBL SOT23-6 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
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