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ADR291/ADR292
VOLTAGE REGULATOR FOR PORTABLE
EQUIPMENT
The ADR291/ADR292 family of references is ideal for provid-
CHARGER
INPUT
0.1μF
2
V IN
R3
510k ?
ing a stable, low cost, and low power reference voltage in
portable equipment power supplies. Figure 36 shows how the
ADR291/
ADR292
ADR291 and ADR292 can be used in a voltage regulator that
not only has low output noise (as compared to switch mode
design) and low power, but also a very fast recovery after
6V
LEAD-ACID
BATTERY
+
V OUT 6
NC 3
GND
4
2
3
7
OP20
4
6
IRF9530
current surges. Some precautions should be taken in the
5V, 100mA
selection of the output capacitors. Too high an ESR (effective
series resistance) could endanger the stability of the circuit. A
solid tantalum capacitor, 16 V or higher, and an aluminum
R1
402k ?
1%
R2
402k ?
1%
C1
68μF
TANT
+
+ C2
1000μF
ELECT
electrolytic capacitor, 10 V or higher, are recommended for C1
and C2, respectively. Also, the path from the ground side of C1
and C2 to the ground side of R1 should be kept as short as
possible.
Rev. F | Page 15 of 20
Figure 36. Voltage Regulator for Portable Equipment
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相关代理商/技术参数
ADR291WFRZ-R7
功能描述:IC VREF SERIES PREC 2.5V 8-SOICN RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 标准包装:2,000 系列:- 基准类型:旁路，可调节，精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3（TO-226AA）成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR)
ADR291WFRZ-RL
功能描述:IC VREF SERIES PREC 2.5V 8-SOICN RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 标准包装:2,000 系列:- 基准类型:旁路，可调节，精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3（TO-226AA）成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR)
ADR292
制造商:AD 制造商全称:Analog Devices 功能描述:Low Noise Micropower Precision Voltage References
ADR292ER
制造商:Analog Devices 功能描述:V-Ref Precision 4.096V 5mA 8-Pin SOIC N Tube 制造商:Analog Devices 功能描述:IC VOLT REF
ADR292ER-REEL
制造商:Analog Devices 功能描述:V-Ref Precision 4.096V 5mA 8-Pin SOIC N T/R
ADR292ER-REEL7
制造商:AD 制造商全称:Analog Devices 功能描述:Low Noise Micropower Precision Voltage References
ADR292ER-RELL
制造商:AD 制造商全称:Analog Devices 功能描述:Low Noise Micropower Precision Voltage References
ADR292ERZ
功能描述:IC VREF SERIES PREC 4.096V 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 标准包装:3,000 系列:- 基准类型:旁路，精度 输出电压:3V 容差:±0.5% 温度系数:100ppm/°C 输入电压:- 通道数:1 电流 - 阴极:82µA 电流 - 静态:- 电流 - 输出:15mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-TSSOP（5 引线），SC-88A，SOT-353 供应商设备封装:SC-70-5 包装:带卷 (TR) 其它名称:296-20888-2