参数资料
| 型号： | CM3202-00DE |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC CONVERTER DDR DDR2 WDFN8 |
| 产品变化通告： | Product Discontinuation 30/Sept/2011 |
| 标准包装： | 3,000 |
| 应用： | 转换器，DDR，DDR2 |
| 输入电压： | 3.1 V ~ 3.6 V |
| 输出数： | 2 |
| 输出电压： | 1.7 V ~ 2.8 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-WDFN（3x3） |
| 包装： | 带卷 (TR) |
CM3202 ? 00
APPLICATION INFORMATION (Cont’d)
Adjusting VDDQ Output Voltage
The CM3202 ? 00 internal bandgap reference is set at 1.25 V. The V DDQ voltage is adjustable by using a resistor divider, R1
and R2:
V DDQ + V ADJ
R 1 ) R 2
R 2
where V ADJ = 1.25 V. For best regulator stability, we recommend that R 1 and R 2 not exceed 10 k W each.
Shutdown
ADJSD also serves as a shutdown pin. When this is pulled high (SHDN_H), both the VDDQ and the VTT outputs tri ? state
and could sink/source less than 10 m A. During shutdown, the quiescent current is reduced to less than 0.5 mA, independent
of output load.
It is recommended that a low leakage Schottky diode be placed between the ADJSD Pin and an external shutdown signal
to prevent interference with the ADJ pin’s normal operation. When the diode anode is pulled low, or left open, the CM3202 ? 00
is again enabled.
Current Limit, Foldback and Over ? temperature Protection
The CM3202 ? 00 features internal current limiting with thermal protection. During normal operation, V DDQ limits the output
current to approximately 2 A and V TT limits the output current to approximately ± 2 A. When V TT is current limiting into a hard
short circuit, the output current folds back to a lower level, about 1 A, until the over ? current condition ends. While current
limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ratings of the
package. If the junction temperature of the device exceeds 170 ° C (typical), the thermal protection circuitry triggers and
tri ? states both VDDQ and VTT outputs. Once the junction temperature has cooled to below about 120 ° C the CM3202 ? 00
returns to normal operation.
Thermal Considerations
Typical Thermal Characteristics
The overall junction to ambient thermal resistance ( q JA ) for device power dissipation (P D ) primarily consists of two paths
in the series. The first path is the junction to the case ( q JC ) which is defined by the package style and the second path is case
to ambient ( q CA ) thermal resistance which is dependent on board layout. The final operating junction temperature for any
condition can be estimated by the following thermal equation:
T JUNC + T AMB ) P D
+ T AMB ) P D
( q JC ) ) P D
( q CA )
( q CA )
P D + 170° C * 85° C + 1.5 W
When a CM3202 ? 00 using WDFN8 package is mounted on a double ? sided printed circuit board with four square inches
of copper allocated for “heat spreading,” the q JA is approximately 55 ° C/W. Based on the over temperature limit of 170 ° C with
an ambient temperature of 85 ° C, the available power of the package will be:
55° C W
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| CM3202-00SM | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:DDR VDDQ and Termination Voltage Regulator |
| CM3202-02DE | 功能描述:线性稳压器 - 标准 VDDQ/VTT Regulator RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| CM3202-02SM | 功能描述:线性稳压器 - 标准 VDDQ/VTT Regulator P2 Fused RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| CM3202A3OP | 制造商:CAPELLA 功能描述:High Precision Ambient Light sensor |
| CM3204A3OG | 制造商:CAPELLA 功能描述:5 bit Analog output Ambient light sensor |
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