CMPWR330(2011) 查看數據表（PDF） - ON Semiconductor
零件编号
产品描述 (功能)
生产厂家
CMPWR330 Datasheet PDF : 10 Pages
| |||
CMPWR330
PACKAGE / PINOUT DIAGRAM
VSBY
VCC
VOUT
VAUX
Top View
1
8
2
7
3
6
4
5
GND
GND
GND
GND
8−Pin Power SOIC
Table 1. PIN DESCRIPTIONS
Pin(s)
Name
Description
1
VSBY
VSBY is the standby input supply (5 V), which is used to power the regulator whenever VCC is below the
deselect level (4.2 V). If the VSBY 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 mF to 10 mF will ensure
adequate filtering.
2
VCC
VCC is a positive input supply for the voltage regulator. Whenever this supply voltage exceeds the VCCSEL
level (4.4 V), it will be given priority and be used to power the regulator output. If this supply voltage falls
below the VCCDES 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 VCC. The effective source impedance of VCC should be kept below 0.3 W to ensure changeover
disturbances do not exceed the hysteresis level.
If the connection to VCC 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 mF to 10 mF will ensure adequate filtering.
3
VOUT
VOUT is the output voltage. Power is provided from the regulator or via the low impedance auxiliary switch.
This output requires a capacitance of 10 mF to ensure regulator stability and minimize the peak output
disturbance during power supply changeover.
4
VAUX
VAUX is the auxiliary voltage power source. This supply is selected only when VCC falls below 4.2 V and the
VSBY is not present. Under these conditions an internal switch is enabled and provides a very low impedance
connection directly between VAUX and VOUT.
5−8
GND The negative reference for all voltages. Also functions as a thermal path for heat dissipation.
SPECIFICATIONS
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
Units
ESD Protection (HBM)
±2000
V
Pin Input Voltages
VCC, VSBY
VAUX
Storage Temperature Range
V
[GND − 0.5] to +6.0
[GND − 0.5] to +4.0
−40 to +150
°C
Operating Temperature Range
Ambient
Junction
°C
0 to +70
0 to +125
Power Dissipation (Note 1)
Internally Limited
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 (qJA) 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
Share Link: 