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參數(shù)資料
| 型號： | ADP3304 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Replaced by BQ24751B : Multi-Cell Synchronous Switch-mode Charger with System Power Selector with Low Iq 28-VQFN -40 to 125 |
| 中文描述： | 高精度anyCAP⑩一○○毫安低壓差線性穩(wěn)壓器 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 125K |
| 代理商： | ADP3304 |
ADP3301
–7–
REV. 0
It is not recommended to use solder mask or silkscreen on the
PCB traces adjacent to the ADP3301’s pins since it will increase
the junction to ambient thermal resistance of the package.
Shutdown Mode
Applying a T T L high signal to the shutdown pin, or tying it to
the input pin, will turn the output ON. Pulling the shutdown
pin low, or tying it to ground, will turn the output OFF. In
shutdown mode, quiescent current is reduced to less than 1
μ
A.
E rror Flag Dropout Detector
T he ADP3301 will maintain its output voltage over a wide
range of load, input voltage and temperature conditions. If, for
example, regulation is lost by reducing the supply voltage below
the combined regulated output and dropout voltages, the ERRor
flag will be activated. T he ERR output is an open collector,
which will be driven low.
Once set, the ERRor flag’s hysteresis will keep the output low
until a small margin of operating range is restored either by
raising the supply voltage or reducing the load.
APPLICAT ION CIRCUIT S
Crossover Switch
T he circuit in Figure 21 shows that two ADP3301s can be used
to form a mixed supply voltage system. T he output switches
between two different levels selected by an external digital input.
Output voltages can be any combination of voltages from the
Ordering Guide.
Higher Output Current
T he ADP3301 can source up to 100 mA without any heatsink
or pass transistor. If higher current is needed, an appropriate
pass transistor can be used, as in Figure 22, to increase the
output current to 1 A.
Step-Up/Step-Down Post Regulator
T he circuit in Figure 23 provides a high precision, low dropout
regulated output voltage. It significantly reduces the ripple from
a switching regulator. T he ADP3000 used in this circuit is a
switching regulator in the step-up configuration.
D1
1N5817
C2
100μF
10V
L1
6.8μH
R1
120
R2
19.6k
1%
R3
10k
1%
ADP3301-3.3
IN
OUT
GND
C3
2.2μF
3.3V @ 100mA
C1
100μF
10V
ADP3000-ADJ
I
LIM
V
IN
SW1
GND
SW2
FB
V
IN
= 2.5V TO 3.5V
Figure 23. Step-Up/Step-Down Post Regulator
V
OUT
= 5V/3.3V
V
IN
= 5.5V TO 12V
OUTPUT SELECT
5V
0V
C2
0.47μF
IN
OUT
GND
SD
ADP3301-5.0
+
+
IN
OUT
GND
SD
ADP3301-3.3
C1
1.0μF
Figure 21. Crossover Switch
V
IN
= 6V TO 8V
V
OUT
= 5V @ 1A
MJE253*
C2
10μF
C1
47μF
R1
50
*AAVID531002 HEAT SINK IS USED
IN
OUT
ERR
GND
SD
ADP3301-5
Figure 22. High Output Current Linear Regulator
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADP3306 | High Accuracy anyCAP⑩ 100 mA Low Dropout Linear Regulator |
| ADP3301 | 100 mA Low Dropout Linear Regulator(高精度低壓差線性穩(wěn)壓器) |
| ADP3302 | 100 mA Low Dropout Dual Linear Regulator(高精度低壓差雙線性穩(wěn)壓器) |
| ADP3303AARU-REEL | High Accuracy anyCAP⑩ Adjustable 200 mA Low Dropout Linear Regulator |
| ADP3303AR-3.2 | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADP3305ARU-3.3-RL | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADP3305ARU-3-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:Analog Devices 功能描述: |
| ADP3306 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Accuracy anyCAP⑩ 100 mA Low Dropout Linear Regulator |
| ADP3307 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Accuracy anyCAP⑩ Adjustable 200 mA Low Dropout Linear Regulator |
| adp3307art-2.5-rl | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
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