- 您现在的位置：买卖IC网 > PDF目录381285 > APL5912-KAC-TU (Anpec Electronics Corporation) 0.8V Reference Ultra Low Dropout (0.2V@5A) Linear Regulator PDF资料下载
参数资料
| 型号： | APL5912-KAC-TU |
| 厂商： | Anpec Electronics Corporation |
| 英文描述： | 0.8V Reference Ultra Low Dropout (0.2V@5A) Linear Regulator |
| 中文描述： | 0.8V的参考超低压降（0.2V的@ 5A）条线性稳压器 |
| 文件页数： | 13/20页 |
| 文件大小： | 477K |
| 代理商： | APL5912-KAC-TU |
Copyright
ANPEC Electronics Corp.
Rev. A.6 - Jun., 2005
APL5912
www.anpec.com.tw
13
Application Information (Cont.)
The APL5912 is designed with a programmable feedback
compensation adjusted by an external feedback network
for the use of wide ranges of ESR and capacitance in
all applications. Ultra-low-ESR capacitors (such as
ceramic chip capacitors), low-ESR bulk capacitors
(such as solid tantalum, POSCap, and Aluminum
electrolytic capacitors) can all be used as an output
capacitor. The value of the output capacitors can be
increased without limit.
During load transients, the output capacitors, depending on
the stepping amplitude and slew rate of load current,
are used to reduce the slew rate of the current seen
by the APL5912 and help the device to minimize the
variations of output voltage for good transient response.
For the applications with large stepping load current,
the low-ESR bulk capacitors are normally recommended.
Decoupling ceramic capacitors must be placed at the
load and ground pins as close as possible and the
impedance of the layout must be minimized.
Input Capacitor
The APL5912 requires proper input capacitors to supply
current surge during stepping load transients to prevent
the input rail from dropping . Because the parasitic
inductor from the voltage sources or other bulk capacitors
to the VIN pin limit the slew rate of the surge currents.
More parasitic inductance needs more input
capacitance.
Ultra-low-ESR capacitors, such as ceramic chip
capacitors, are very good for the input capacitors. An
aluminum electrolytic capacitor (>100
μ
F, ESR<
300m
) is recommended as the input capacitor. It is
not necessary to use low-ESR capacitors. More ca-
pacitance reduce the variations of the input voltage of
VIN pin.
Feedback Network
Output Capacitor (Cont.)
Figure 1 shows the feedback network between VOUT,
GND and FB pins. It works with the internal error am-
plifier to provide proper frequency response for the
linear regulator. The ESR is the equivalent series
resistance of the output capacitor. The C
OUT
is ideal
capacitance in the output capacitor. The V
OUT
is the
setting of the output voltage.
The feedback network selection, depending on the val-
ues of the ESR and C
OUT
, has been classified into
three conditions :
Condition 1 : Large ESR (
≥
18m
)
- Select the R1 in the range of 400
~ 2.4k
- Calculate the R2 as the following:
0.8
R1
R2
OUT(V)
- Calculate the C1 as the following:
V
10
)
(k
Condition 2 : Middle ESR
- Calculate the R1 as the following:
1500
R1
(m
Select a proper R1
(selected)
to be a little larger than
the calculated R1.
- Calculate the C1 as the following:
[
ESR
C1
=
Where R1=R1
(selected)
Select a proper C1
(selected)
to be a little smaller than
V
ERR
V
FB
R1
R2
C1
V
OUT
FB
VOUT
V
REF
EAMP
APL5912
C
OUT
ESR
Figure 1
(1)
..........
0.8
-
V
(V)
(V)
)
(k
)
(k
=
(2)
......
R1
V
40
C1
≤
R1
)
(k
OUT(V)
(nF)
OUT(V)
≤
]
(4)
.........
..........
R1
C
50
)
(k
OUT(uF)
)
(m
(pF)
+
(3)
.........
30
V
37.5
ESR
OUT(V)
)
)
(k
+
=
相关PDF资料 |
PDF描述 |
|---|---|
| APL5912-KAC-TUL | 0.8V Reference Ultra Low Dropout (0.2V@5A) Linear Regulator |
| APL5913-KAC-TR | 0.8V Reference Ultra Low Dropout (0.25V@3A) Linear Regulator |
| APL5913 | 0.8V Reference Ultra Low Dropout (0.25V@3A) Linear Regulator |
| APL5913-KAC-TRL | 0.8V Reference Ultra Low Dropout (0.25V@3A) Linear Regulator |
| APL5913-KAC-TU | 0.8V Reference Ultra Low Dropout (0.25V@3A) Linear Regulator |
相关代理商/技术参数 |
参数描述 |
|---|---|
| APL6 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| APL602B2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Volts:600V RDS(ON)0.125Ohms ID(cont):49Amps|Linear MOSFETs |
| APL602B2G | 功能描述:MOSFET N-CH 600V 49A T-MAX RoHS:是 类别:分离式半导体产品 >> FET - 单 系列:- 标准包装:1,000 系列:MESH OVERLAY™ FET 型:MOSFET N 通道，金属氧化物 FET 特点:逻辑电平门 漏极至源极电压(Vdss):200V 电流 - 连续漏极(Id) @ 25° C:18A 开态Rds（最大）@ Id, Vgs @ 25° C:180 毫欧 @ 9A，10V Id 时的 Vgs(th)（最大）:4V @ 250µA 闸电荷(Qg) @ Vgs:72nC @ 10V 输入电容 (Ciss) @ Vds:1560pF @ 25V 功率 - 最大:40W 安装类型:通孔 封装/外壳:TO-220-3 整包 供应商设备封装:TO-220FP 包装:管件 |
| APL602J | 功能描述:MOSFET N-CH 600V 43A SOT-227 RoHS:是 类别:半导体模块 >> FET 系列:- 标准包装:10 系列:* |
| APL602L | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Volts:600V RDS(ON)0.125Ohms ID(cont):49Amps|Linear MOSFETs |
发布紧急采购，3分钟左右您将得到回复。