参数资料
| 型号： | CMPWR150SF |
| 厂商： | ON Semiconductor |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .5A SOIC8 |
| 产品变化通告： | Product Discontinuation 30/Sept/2011 |
| 标准包装： | 2,500 |
| 系列： | SmartOR™ |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 4.5 V ~ 5.5 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA（最小值） |
| 电流 - 限制（最小）： | 500mA |
| 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） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
CMPWR150
TYPICAL TRANSIENT CHARACTERISTICS
The transient characterization test set ? up shown below
includes the effective source impedance of the V CC supply
(R S ). This was measured to be approximately 0.2 W . It is
recommended that this effective source impedance be no
greater than 0.25 W to ensure precise switching is
maintained during V CC selection and deselection.
Both the rise and fall times during V CC power ? up/down
sequencing were controlled at a 20 millisecond duration.
This is considered to represent worst case conditions for
most application circuits.
A maximum rated load current of 500 mA was used
during characterization, unless specified otherwise.
During a selection or deselection transition, the DC load
current is switching from V AUX to V CC and vice versa. In
addition to the normal load current, there may also be an
in ? rush current for charging/discharging the load capacitor.
The total current pulse being applied to either V AUX or V CC
is equal to the sum of the DC load and the corresponding
in ? rush current. Transient currents in excess of 1.0 amps can
readily occur for brief intervals when either supply
commences to power the load.
The oscilloscope traces of V CC power ? up/down show the
full bandwidth response at the V CC and V OUT pins under
full load (500 mA) conditions.
See Application Note AP ? 211 for more information.
V CC Power ? up Cold Start. Figure 5 shows the output
response during an initial V CC power ? up with V AUX not
present. When V CC reaches the select threshold, the
regulator turns on. The uncharged output capacitor causes
maximum in ? rush current to flow, resulting in a large
voltage disturbance at the V CC pin of about 230 mV. The
built ? in hysteresis of 250 mV ensures the regulator remains
enabled throughout the transient.
Prior to V CC reaching an acceptable logic supply level
(2 V), a disturbance on the Drive pin can be observed.
Figure 5. V CC Power ? up Cold Start
V AUX
3.3 V
Si2301DS
V CC
+5 V
R S
0.2 W
+ C1
C2
V CC
Drive
V OUT
V OUT
TR = 20 ms
TF = 20 ms
10 m F
0.1 m F
GND
C3
0.1 m F
+ C4
10 m F
(500 mA)
6.6 W
GND
Figure 6. Transient Characteristics Test Set ? Up
http://onsemi.com
6
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相关代理商/技术参数 |
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| CMPWR150TO | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:500mA/3.3V SMARTOR Power Regulator |
| CMPWR150TO/R | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| CMPWR150TO/T | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| CMPWR150TOR | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:500mA/3.3V SMARTOR Power Regulator |
| CMPWR150TOT | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:500mA/3.3V SMARTOR Power Regulator |
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