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参数资料
| 型号： | ADP667AN |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | +5 V Fixed, Adjustable Low-Dropout Linear Voltage Regulator |
| 中文描述： | FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.35 V DROPOUT, PDIP8 |
| 封装： | PLASTIC, DIP-8 |
| 文件页数： | 4/8页 |
| 文件大小： | 135K |
| 代理商： | ADP667AN |
ADP667
REV. 0
–4–
APPLICATIONS INFORMATION
Circuit Configurations
For a fixed +5 V output the SET input should be grounded, and
no external resistors are necessary. This basic configuration is
shown in Figure 2. The input voltage can range from +5.15 V
to +16.5 V, and output currents up to 250 mA are available
provided that the maximum package power dissipation is not
exceeded.
IN
OUT
GND
SET
SHDN
ADP667
+5V
OUTPUT
C1
10μF
+
+
Figure 2. Fixed +5 V Output Circuit
Output Voltage Setting
If the SET input is connected to a resistor divider network, the
output voltage is set according to the following equation:
V
OUT
=
V
SET
×
R
1
+
R
2
R
1
where
V
SET
= 1.255 V.
IN
OUT
GND
SET
SHDN
ADP667
+
R1
R2
V
IN
V
OUT
C1
10μF
Figure 3. Adjustable Output Circuit
The resistor values may be selected by first choosing a value for
R1 and then selecting R2 according to the following equation:
R
2
=
R
1
×
V
OUT
V
SET
1
The input leakage current on SET is 10 nA maximum. This
allows large resistor values to be chosen for R1 and R2 with
little degradation in accuracy. For example, a 1 M
resistor
may be selected for R1, and then R2 may be calculated accord-
ingly. The tolerance on SET is guaranteed at less than
±
25 mV,
so in most applications fixed resistors will be suitable.
Shutdown Input (SHDN)
The SHDN input allows the regulator to be switched off with a
logic level signal. This will disable the output and reduce the
current drain to a low quiescent (1
μ
A maximum) current. This
is very useful for low power applications. Driving the SHDN in-
put to greater than 1.5 V places the part in shutdown.
If the shutdown function is not being used, then SHDN should
be connected to GND.
Low Supply or Low Battery Detection
The ADP667 contains on-chip circuitry for low power supply or
battery detection. If the voltage on the LBI pin falls below the
internal 1.255 V reference, then the open drain output LBO will
go low. The low threshold voltage may be set to any voltage
above 1.255 V by appropriate resistor divider selection.
R
3
=
R
4
×
V
BATT
V
LBI
–1
where R3 and R4 are the resistive divider resistors and V
BATT
is
the desired low voltage threshold.
Since the LBI input leakage current is less than 10 nA, large val-
ues may be selected for R3 and R4 in order to minimize loading.
For example, a 6 V low threshold, may be set using 10 M
for
R3 and 2.7 M
for R4.
The LBO output is an open-drain output that goes low sinking
current when LBI is less than 1.255 V. A pull-up resistor of
10 k
or greater may be used to obtain a logic output level with
the pull-up resistor connected to V
OUT
.
IN
OUT
LBO
ADP667
C1
10μF
+
10k
V
IN
LBI
GND
SET
SHDN
R3
R4
LOW BATTERY
STATUS OUTPUT
V
OUT
Figure 4. Low Battery/Supply Detect Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP667ANZ | 功能描述:IC REG LDO 5V/ADJ .25A 8-DIP 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 |
| ADP667AR | 制造商:Rochester Electronics LLC 功能描述:LOW DROPOUT LINEAR VOLTAGE REGULATOR - Bulk 制造商:Analog Devices 功能描述:IC VOLTAGE REGULATOR |
| ADP667AR-REEL | 制造商:Analog Devices 功能描述:LDO Regulator Pos 1.3V to 16V5V 0.25A 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:LOW DROPOUT LINEAR VOLTAGE REGULATOR - Tape and Reel |
| ADP667AR-REEL7 | 制造商:Analog Devices 功能描述:LDO Regulator Pos 1.3V to 16V5V 0.25A 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:LOW DROPOUT LINEAR VOLTAGE REGULATOR - Tape and Reel |
| ADP667ARZ | 功能描述:IC REG LDO 5V/ADJ .25A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:8V 输入电压:10.5 V ~ 23 V 电压 - 压降（标准）:1.7V @ 40mA 稳压器数量:1 电流 - 输出:100mA（最小值） 电流 - 限制（最小）:- 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:剪切带 (CT) 产品目录页面:1075 (CN2011-ZH PDF) 其它名称:296-24390-1 |
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