参数资料
| 型号： | ADP7104ARDZ-3.3-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/28页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .5A 8SOIC |
| 标准包装： | 1,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 20V |
| 电压 - 压降（标准）： | 0.35V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA（最小值） |
| 电流 - 限制（最小）： | 625mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 供应商设备封装： | 8-SOIC-EP |
| 包装： | 带卷 (TR) |
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ADP7104
THEORY OF OPERATION
The ADP7104 is a low quiescent current, low-dropout linear
regulator that operates from 3.3 V to 20 V and provides up to
500 mA of output current. Drawing a low 1 mA of quiescent
current (typical) at full load makes the ADP7104 ideal for
battery-operated portable equipment. Typical shutdown
current consumption is 40 μA at room temperature.
Optimized for use with small 1 μF ceramic capacitors, the
ADP7104 provides excellent transient performance.
Data Sheet
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 ADP7104 is available in seven fixed output voltage options,
ranging from 1.5 V to 9 V and in an adjustable version with an
output voltage that can be set to between 1.22 V and 19 V by an
external voltage divider. The output voltage can be set according
to the following equation:
VIN
VOUT
V OUT = 1.22 V(1 + R1 / R2 )
GND
VREG
SHORT-CIRCUIT,
THERMAL
PROTECT
PGOOD
R1
PG
V IN = 8V
CIN +
1μF
VIN
VOUT
ADJ
R1
40.2k?
+ COUT
1μF
V OUT = 5V
ON 100k ?
EN/
UVLO
10μA
SHUTDOWN
R2
SENSE
OFF
R3
R4
100k ?
EN/
UVLO
R2
13k?
RPG
100k?
1.22V
REFERENCE
GND
PG
PG
Figure 59. Fixed Output Voltage Internal Block Diagram
Figure 61. Typical Adjustable Output Voltage Application Schematic
The value of R2 should be less than 200 kΩ to minimize errors
VIN
VOUT
in the output voltage caused by the ADJ pin input current. For
GND
EN/
VREG
10μA
SHORT-CIRCUIT,
THERMAL
PROTECT
SHUTDOWN
PGOOD
R2
PG
ADJ
example, when R1 and R2 each equal 200 kΩ, the output voltage
is 2.44 V. The output voltage error introduced by the ADJ pin input
current is 2 mV or 0.08%, assuming a typical ADJ pin input
current of 10 nA at 25°C.
UVLO
1.22V
REFERENCE
Figure 60. Adjustable Output Voltage Internal Block Diagram
Internally, the ADP7104 consists 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 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
The ADP7104 uses the EN/UVLO pin to enable and disable
the VOUT pin under normal operating conditions. When
EN/UVLO is high, VOUT turns on, when EN is low, VOUT
turns off. For automatic startup, EN/UVLO can be tied to VIN.
The ADP7104 incorporates reverse current protections circuitry
that prevents current flow backwards through the pass element
when the output voltage is greater than the input voltage. A
comparator senses the difference between the input and output
voltages. When the difference between the input voltage and
output voltage exceeds 55 mV, the body of the PFET is switched
to V OUT and turned off or opened. In other words, the gate is
connected to VOUT.
pass and increasing the output voltage. If the feedback voltage
Rev. F | Page 16 of 28
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP7104ARDZ-5.0-R7 | 功能描述:IC REG LDO 5V .5A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:800 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:最高 16V 电压 - 压降（标准）:0.7V @ 4A 稳压器数量:1 电流 - 输出:4A 电流 - 限制（最小）:4.2A 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-6，D²Pak（5 引线+接片），TO-263BA 供应商设备封装:TO-263-5 包装:带卷 (TR) 其它名称:AP1184K525L-13AP1184K525LDITR |
| ADP7104ARDZ-9.0-R7 | 功能描述:IC REG LDO 9V .5A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:800 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:最高 16V 电压 - 压降（标准）:0.7V @ 4A 稳压器数量:1 电流 - 输出:4A 电流 - 限制（最小）:4.2A 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-6，D²Pak（5 引线+接片），TO-263BA 供应商设备封装:TO-263-5 包装:带卷 (TR) 其它名称:AP1184K525L-13AP1184K525LDITR |
| ADP7104ARDZ-R7 | 功能描述:IC REG LDO ADJ .5A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:800 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:最高 16V 电压 - 压降（标准）:0.7V @ 4A 稳压器数量:1 电流 - 输出:4A 电流 - 限制（最小）:4.2A 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-6，D²Pak（5 引线+接片），TO-263BA 供应商设备封装:TO-263-5 包装:带卷 (TR) 其它名称:AP1184K525L-13AP1184K525LDITR |
| ADP7104CP-EVAL | 制造商:Analog Devices 功能描述:EVAL LDO 20V0.3ALFCSPADP7102 制造商:Analog Devices 功能描述:ADP7104, LDO, CMOS, EVALUATION BOARD |
| ADP7104CP-EVALZ | 制造商:Analog Devices 功能描述: |
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