参数资料
| 型号： | AP7168-SPG-13 |
| 厂商： | Diodes Inc |
| 文件页数： | 7/11页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1.2A 8SOP |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 0.8 V ~ 5 V |
| 输入电压： | 2.2 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.5V @ 1A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.2A（最小值） |
| 电流 - 限制（最小）： | 1.2A |
| 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-SO 裸露焊盘 |
| 包装： | 标准包装 |
| 产品目录页面： | 1135 (CN2011-ZH PDF) |
| 其它名称： | AP7168-SPG-13DIDKR |
AP7168
1.2A LOW DROPOUT REGULATOR WITH POK
Typical Performance Characteristics (Continued)
Current Limit vs. Temperature
1.8
1.7
1.6
1.5
VIN =2.8V,Vout=1.8V
VIN =3.3V,Vout=1.8V
1.4
-50
-25
0
25
50
75
100
Temperature ( C)
o
Application Note
Input Capacitor
A 1 μ F ceramic capacitor is recommended to connect
between IN and GND pins to decouple input power supply
V IN
IN
OUT
V OUT
glitch and noise. The amount of the capacitance may be
increased without limit. A lower ESR (Equivalent Series
C IN
100kOhm
AP7168
R 1
C OUT
Resistance) capacitor allows the use of less capacitance,
while higher ESR type requires more capacitance. This
input capacitor should be located as close as possible to
POK
FB
R 2
the device to assure input stability and less noise. For
PCB layout, a wide copper trace is required for both IN
Enable
EN
GND
and GND.
Output Capacitor
V OUT = V REF ? ? 1 +
R 1 ?
R 2 ? ?
The output capacitor is required to stabilize and help the
transient response of the LDO. The AP7168 is designed to
have excellent transient response for most applications
with a small amount of output capacitance. The AP7168 is
The output voltage is calculated by:
?
?
?
R 1 2 ? ? OUT ? 1 ? ?
= R
stable for all available types and values of output
capacitors ≥ 4.7 μ F. The device is also stable with multiple
capacitors in parallel, which can be of any type of value.
Additional capacitance helps to reduce undershoot and
overshoot during transient. This capacitor should be
placed as close as possible to OUT and GND pins for
optimum performance.
Adjustable Operation
The AP7168 provides output voltage from 0.8V to 5.0V
through external resistor divider as shown below.
Where V REF =0.8V (the internal reference voltage)
Rearranging the equation will give the following equation
to find the approximate resistor divider values:
? V ?
? V REF ?
To maintain the stability of the internal reference voltage,
R 2 needs to be kept smaller than 250k Ω .
AP7168
Document number: DS32019 Rev. 2 - 2
7 of 11
September 2010
? Diodes Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| AP7173-FNG-7 | IC REG LDO ADJ 1.5A 10DFN |
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| AP7217A-33SG-13 | IC REG LDO 3.3V .6A 8-SOIC |
| AP7217C-13SPG-13 | IC REG LDO 1.25V .6A 8-SOIC |
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