参数资料
| 型号： | ADP122AUJZ-2.9-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.9V .3A 5TSOT |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.9V |
| 输入电压： | 最高 5.5V |
| 电压 - 压降（标准）： | 0.085V @ 300mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 300mA（最小值） |
| 电流 - 限制（最小）： | 350mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 包装： | 标准包装 |
| 产品目录页面： | 792 (CN2011-ZH PDF) |
| 其它名称： | ADP122AUJZ-2.9-R7DKR |
Data Sheet
THEORY OF OPERATION
The ADP122/ADP123 are low quiescent current, low-dropout
linear regulators that operate from 2.3 V to 5.5 V and can provide
up to 300 mA of output current. Drawing a low 170 μA of quies-
cent current (typical) at full load makes the ADP122/ADP123
ideal for battery-operated portable equipment. Shutdown current
consumption is typically 100 nA.
ADP122/ADP123
Note that in shutdown, the output is turned off and the divider
current is 0.
The ADP122/ADP123 use the EN pin to enable and disable the
VOUT pin under normal operating conditions. When EN is high,
VOUT turns on; when EN is low, VOUT turns off. For automatic
startup, EN can be tied to VIN.
Optimized for use with small 1 μF ceramic capacitors, the
ADP122/ADP123 provide excellent transient performance.
VIN
ADP122
VOUT
Internally, the ADP122/ADP123 consist of a reference, an error
amplifier, a feedback voltage divider, and a PMOS pass transistor.
Output current is delivered via the PMOS pass device, which is
controlled by the error amplifier. The error amplifier compares
the reference voltage with the feedback voltage from the output
GND
SHORT CIRCUIT,
UVLO AND
THERMAL
PROTECT
R1
and amplifies the difference. If the feedback voltage is lower than
the reference voltage, the gate of the PMOS device is pulled lower,
allowing more current to pass and increasing the output voltage.
EN
SHUTDOWN
0.5V REFERENCE
R2
If the feedback voltage is higher than the reference voltage, the
gate of the PMOS device is pulled higher, allowing less current
to pass and decreasing the output voltage.
The adjustable ADP123 has an output voltage range of 0.8 V to
5.0 V. The output voltage is set by the ratio of two external resistors,
NOTES
1. R1 AND R2 ARE INTERNAL RESISTORS, AVAILABLE ON
THE ADP122 ONLY.
Figure 30. ADP122 Internal Block Diagram (Fixed Output)
as shown in Figure 2. The device servos the output to maintain
the voltage at the ADJ pin at 0.5 V referenced to ground. The
VIN
ADP123
VOUT
current in R1 is then equal to 0.5 V/R2 and the current in R1 is
the current in R2 plus the ADJ pin bias current. The ADJ pin
bias current, 15 nA at 25°C, flows through R1 into the ADJ pin.
The output voltage can be calculated using the equation:
GND
SHORT CIRCUIT,
UVLO AND
THERMAL
PROTECT
V OUT = 0.5 V(1 + R1 / R2 ) + ( ADJ I-BIAS )( R1 )
The value of R1 should be less than 200 kΩ to minimize errors
in the output voltage caused by the ADJ pin bias current. For
EN
SHUTDOWN
0.5V REFERENCE
ADJ
example, when R1 and R2 each equal 200 kΩ, the output voltage
is 1.0 V. The output voltage error introduced by the ADJ pin
bias current is 3 mV or 0.3%, assuming a typical ADJ pin bias
current of 15 nA at 25°C.
Rev. E | Page 11 of 24
Figure 31. ADP123 Internal Block Diagram (Adjustable Output)
相关PDF资料 |
PDF描述 |
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| ADP124ARHZ-2.85-R7 | IC REG LDO 2.85V .5A 8MSOP |
| ADP130AUJZ-2.5-R7 | IC REG LDO 2.5V .35A TSOT-23-5 |
| ADP150AUJZ-2.5-R7 | IC REG LDO 2.5V .15A TSOT-5 |
| ADP151ACPZ-3.0-R7 | IC REG LDO 3V .2A 6LFCSP |
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| ADP122AUJZ-3.0-R7 | 功能描述:IC REG LDO 3V .3A 5TSOT RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:最高 5.5V 电压 - 压降（标准）:0.12V @ 150mA 稳压器数量:1 电流 - 输出:150mA（最小值） 电流 - 限制（最小）:220mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:带卷 (TR) 其它名称:ADP160AUJZ-3.0-R7TR |
| ADP122AUJZ-3.3-R7 | 功能描述:IC REG LDO 3.3V .3A 5TSOT RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:最高 5.5V 电压 - 压降（标准）:0.12V @ 150mA 稳压器数量:1 电流 - 输出:150mA（最小值） 电流 - 限制（最小）:220mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:带卷 (TR) 其它名称:ADP160AUJZ-3.0-R7TR |
| ADP122AUJZ-3.3-R7 | 制造商:Analog Devices 功能描述:IC LDO VOLT REG 3.3V 0.3A TSOT-5 制造商:Analog Devices 功能描述:IC, LDO VOLT REG, 3.3V, 0.3A, TSOT-5 |
| ADP122-BL1-EVZ | 制造商:Analog Devices 功能描述:BLANK ADISIMPOWER EVAL ADP122 - Boxed Product (Development Kits) |
| ADP122UJZ-REDYKIT | 功能描述:KIT REDI TOOL 2.5/3.3 ADP123 RoHS:是 类别:编程器，开发系统 >> 评估板 - 线性稳压器 (LDO) 系列:Redykit™ 产品变化通告:1Q2012 Discontinuation 30/Mar/2012 设计资源:NCP590MNDPTAGEVB Gerber Files 标准包装:1 系列:- 每 IC 通道数:2 - 双 输出电压:1.8V，2.8V 电流 - 输出:300mA 输入电压:2.1 ~ 5.5 V 稳压器类型:正，固定式 工作温度:-40°C ~ 85°C 板类型:完全填充 已供物品:板 已用 IC / 零件:NCP590MNDP 其它名称:NCP590MNDPTAGEVB-NDNCP590MNDPTAGEVBOS |
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