参数资料
| 型号： | AP7167-FNG-7 |
| 厂商： | Diodes Inc |
| 文件页数： | 9/14页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1.2A 10-DFN |
| 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： | 10-UFDFN 裸露焊盘 |
| 供应商设备封装： | DFN3030-10 |
| 包装： | 标准包装 |
| 产品目录页面： | 1135 (CN2011-ZH PDF) |
| 其它名称： | AP7167-FNGDIDKR |
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Application Notes
Input Capacitor
R 1 = R 2 ? ? OUT ? 1 ? ?
A 1 μ F ceramic capacitor is recommended to connect
between IN and GND pins to decouple input power supply
glitch and noise. The amount of the capacitance may be
increased without limit. A lower ESR (Equivalent Series
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
the device to assure input stability and less noise. For
PCB layout, a wide copper trace is required for both IN
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 .
and GND.
No Load Stability
Output Capacitor
The output capacitor is required to stabilize and help the
transient response of the LDO. The AP7167 is designed to
have excellent transient response for most applications
with a small amount of output capacitance. The AP7167 is
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.
Other than external resistor divider, no minimum load is
required to keep the device stable. The device will remain
stable and regulated in no load condition.
ENABLE/SHUTDOWN Operation
The AP7167 is turned on by setting the EN pin high, and is
turned off by pulling it low. If this feature is not used, the
EN pin should be tied to IN pin to keep the regulator output
on at all time. To ensure proper operation, the signal
source used to drive the EN pin must be able to swing
above and below the specified turn-on/off voltage
thresholds listed in the Electrical Characteristics section
under V IL and V IH .
Adjustable Operation
The AP7167 provides output voltage from 0.8V to 5.0V
through external resistor divider as shown below.
POWER-OK
The Power-Ok (POK) pin is an active high open-drain
V IN
IN
OUT
V OUT
output. It can be connected to any 5.5V or lower rail
through an external pull-up resistor. The recommended
sink current of POK pin is up to 4mA, so the pull-up
C IN
100kOhm
AP7167
R 1
C OUT
resistor for POK should be in the range of 10k ? to 1M ? . If
output voltage monitoring is not needed, the POK pin can
POK
FB
R 2
be left floating.
Current Limit Protection
Enable
EN
GND
When output current at OUT pin is higher than current limit
threshold, the current limit protection will be triggered and
clamp the output current to approximately 1.6A (1.2A min)
The output voltage is calculated by:
to prevent over-current and to protect the regulator from
damage due to overheating.
V OUT = V REF ? ? 1 +
R 1 ?
R 2 ? ?
?
?
?
Short Circuit Protection
When OUT pin is short-circuited to GND or OUT pin
voltage is less than 200mV, short circuit protection will be
Where V REF =0.8V (the internal reference voltage)
triggered and clamp the output current to approximately
750mA. This feature protects the regulator from over-
current and damage due to overheating.
AP7167
Document number: DS31252 Rev. 7 - 2
9 of 14
September 2010
? Diodes Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| AP7168-SPG-13 | IC REG LDO ADJ 1.2A 8SOP |
| AP7173-FNG-7 | IC REG LDO ADJ 1.5A 10DFN |
| AP7215-33YG-13 | IC REG LDO 3.3V .6A SOT89-3 |
| AP7217-33SG-13 | IC REG LDO 3.3V .5A 8-SOIC |
| AP7217A-33SG-13 | IC REG LDO 3.3V .6A 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AP7167-SPG-13 | 功能描述:低压差稳压器 - LDO 1.2A 250mV 2.2V-5.5V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| AP7168 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:1.2A LOW DROPOUT REGULATOR WITH POK |
| AP7168_10 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:1.2A LOW DROPOUT REGULATOR WITH POK |
| AP7168-SPG-13 | 功能描述:低压差稳压器 - LDO LDO REG W/ POK 1.2A,2.2V-5.5V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| AP7-1-69-103 | 制造商:Sensata Technologies 功能描述:Circuit Breaker Magnetic 1Pole 10A |
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