参数资料
| 型号： | CMPWR330SF |
| 厂商： | ON Semiconductor |
| 文件页数： | 3/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .4A 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： | 最高 5.25V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 400mA（最小值） |
| 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) |
CMPWR330
PACKAGE / PINOUT DIAGRAM
Top View
V SBY
V CC
V OUT
V AUX
1
2
3
4
8
7
6
5
GND
GND
GND
GND
8 ? Pin Power SOIC
Table 1. PIN DESCRIPTIONS
Pin(s)
1
2
3
4
5 ? 8
Name
V SBY
V CC
V OUT
V AUX
GND
Description
V SBY is the standby input supply (5 V), which is used to power the regulator whenever V CC is below the
deselect level (4.2 V). If the V SBY connection is made within a few inches of the main input filter, a bypass
capacitor may not be necessary. Otherwise a bypass filter capacitor in the range of 1 m F to 10 m F will ensure
adequate filtering.
V CC is a positive input supply for the voltage regulator. Whenever this supply voltage exceeds the V CCSEL
level (4.4 V), it will be given priority and be used to power the regulator output. If this supply voltage falls
below the V CCDES level (4.2 V) it will immediately be deselected and no longer provide power for the regulator
output. An internal hysteresis voltage of 0.2 V is used to prevent any chatter during selection and deselection
of V CC . The effective source impedance of V CC should be kept below 0.3 W to ensure changeover
disturbances do not exceed the hysteresis level.
If the connection to V CC is made within a few inches of the main input filter, a bypass capacitor may not be
necessary. Otherwise a bypass filter capacitor in the range of 1 m F to 10 m F will ensure adequate filtering.
V OUT is the output voltage. Power is provided from the regulator or via the low impedance auxiliary switch.
This output requires a capacitance of 10 m F to ensure regulator stability and minimize the peak output
disturbance during power supply changeover.
V AUX is the auxiliary voltage power source. This supply is selected only when V CC falls below 4.2 V and the
V SBY is not present. Under these conditions an internal switch is enabled and provides a very low impedance
connection directly between V AUX and V OUT .
The negative reference for all voltages. Also functions as a thermal path for heat dissipation.
SPECIFICATIONS
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameter
ESD Protection (HBM)
Pin Input Voltages
V CC , V SBY
V AUX
Storage Temperature Range
Operating Temperature Range
Ambient
Junction
Power Dissipation (Note 1)
Rating
± 2000
[GND ? 0.5] to +6.0
[GND ? 0.5] to +4.0
? 40 to +150
0 to +70
0 to +125
Internally Limited
Units
V
V
° C
° C
W
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. At rated load, the power dissipation will be 0.68 W (1.7 V x 0.4 A). Under these conditions, (in a 70 ° C ambient), the thermal resistance from
junction to ambient ( q JA ) must not exceed 80 ° C/W. This is typically achieved with 2 square inches of copper printed circuit board area
connected to the GND pins for heat spreading, or equivalent.
http://onsemi.com
3
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