- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374022 > ADP3367* (Analog Devices, Inc.) +5 V Fixed. Adjustable Low-Dropout Linear Voltage Regulator PDF資料下載
參數(shù)資料
| 型號(hào)： | ADP3367* |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | +5 V Fixed. Adjustable Low-Dropout Linear Voltage Regulator |
| 中文描述： | 5 V固定?？烧{(diào)低壓差線性穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大?。?/td> | 148K |
ADP3367
REV. 0
–5–
APPLICAT IONS INFORMAT ION
Circuit Configurations
For a fixed +5 V output the SET input should be grounded, and
no external resistors are necessary. T his basic configuration is
shown in Figure 8. T he input voltage can range from +5.15 V
to +16.5 V, and output currents up to 300 mA are available
provided that the maximum package power dissipation is not
exceeded.
IN
OUT
GND
SET
SHDN
ADP3367
+5V
OUTPUT
C1
10μF
+
+
Figure 8. 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
ADP3367
+
R1
R2
V
IN
V
OUT
C1
10μF
Figure 9. Adjustable Output Circuit
T he 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
T he input leakage current on SET is 10 nA maximum. T his
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. T he tolerance on SET is guaranteed at less than
±
25 mV,
so in most applications fixed resistors will be suitable.
Shutdown Input (SHDN)
T he SHDN input allows the regulator to be switched off with a
logic level signal. T his will disable the output and reduce the
current drain to a low quiescent (0.75
μ
A maximum) current.
T his is very useful for low power applications. Driving the
SHDN input 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
T he ADP3367 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. T he 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
BAT T
is
the desired low voltage threshold.
Since the LBI input leakage current is less than 10 nA, large
values 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.
T he 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
ADP3367
C1
10μF
+
10k
V
IN
LBI
GND
SET
SHDN
R3
R4
LOW BATTERY
STATUS OUTPUT
V
OUT
Figure 10. Low Battery/Supply Detect Circuit
Dropout Detector
T he ADP3367 features an extremely low dropout voltage mak-
ing it suitable for low voltage systems where headroom is
limited. A dropout detector is also provided. T he dropout
detector output, DD, changes as the dropout voltage approaches
its limit. T his is useful for warning that regulation can no longer be
maintained. T he dropout detector output is an open collector out-
put from a PNP transistor. Under normal operating conditions
with the input voltage more than 300mV above the output, the
PNP transistor is off and no current flows out the DD pin. As the
voltage differential reduces to less than 300mV, the transistor
switches on and current is sourced. T his condition indicates that
regulation can no longer be maintained. Please refer to Figure 4 in
the “T ypical Performance Characteristics.” T he current output
can be translated into a voltage output by connecting a resistor
from DD to GND. A resistor value of 100 k
is suitable. A digital
status signal can be obtained using a comparator. T he on-chip
comparator LBI may be used if it is not being used to monitor a
battery voltage. T his is illustrated in Figure 11.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADP3367AR | 2nd Level Over Voltage Protection for 2, 3, or 4 Cell LiIon & LiPoly Batteries (2nd Lev Protection) 8-SM8 |
| ADP3404ARU | GSM Power Management System |
| ADP3404 | GSM Power Management System |
| ADP3405ARU | Replaced by BQ29412 : Voltage Protection for 2-,3-or,4-Cell Lion Batteries (2nd Protection) 8-TSSOP -20 to 85 |
| ADP3405 | Replaced by BQ29412 : Voltage Protection for 2-,3-or,4-Cell Lion Batteries (2nd Protection) 8-TSSOP -20 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADP3367AR | 制造商:Analog Devices 功能描述:LDO Regulator Pos 1.3V to 16V5V 0.2A 8-Pin SOIC N 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 |
| ADP3367AR-REEL | 制造商:Analog Devices 功能描述:LDO Regulator Pos 1.3V to 16V5V 0.2A 8-Pin SOIC N T/R |
| ADP3367AR-REEL7 | 制造商:Analog Devices 功能描述:LDO Regulator Pos 1.3V to 16V5V 0.2A 8-Pin SOIC N T/R |
| ADP3367ARZ | 功能描述:IC REG LDO 5V/ADJ .2A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:8V 輸入電壓:10.5 V ~ 23 V 電壓 - 壓降（標(biāo)準(zhǔn)）:1.7V @ 40mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:100mA（最小值） 電流 - 限制（最?。?- 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:1075 (CN2011-ZH PDF) 其它名稱:296-24390-1 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。