参数资料
| 型号： | AP5100WG-7 |
| 厂商： | Diodes Inc |
| 文件页数： | 3/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.2A 26SOT |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.81 V ~ 15 V |
| 输入电压： | 4.75 V ~ 24 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 1.2A |
| 同步整流器： | 无 |
| 工作温度： | -25°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 包装： | 标准包装 |
| 供应商设备封装： | SOT-26 |
| 其它名称： | AP5100WG-7DIDKR |
AP5100
1.2A STEP-DOWN CONVERTER with 1.4MHz SWITCHING
FREQUENCY
Pin Descriptions
Pin Name
BST
GND
FB
EN
IN
SW
Pin #
1
2
3
4
5
6
Description
Bootstrap. To form a boost circuit, a capacitor is connected between SW and BST pins to form a
floating supply across the power switch driver. This capacitor is needed to drive the power switch’s
gate above the supply voltage. Typical values for C BST range from 0.1μF to 1μF.
Ground. This pin is the voltage reference for the regulated output voltage. All control circuits are
referenced to this pin. For this reason care must be taken in its layout.
Feedback. To set the output voltage, connect this pin to the output resistor divider or directly to
V OUT . To prevent current limit run away during a current limit condition, the frequency foldback
comparator lowers the oscillator frequency when the FB voltage is below 400mV.
On/Off Control Input. Do not leave this pin floating. To turn the device ON, pull EN above 1.2V and
to turn it off pull below 0.4V.
If enable/disable is not used, connect a 100k ? resistor between EN to V IN .
Supply Voltage. The AP5100 operates from a +4.75V to +24V unregulated input. A decoupling
capacitor C1 is required to prevent large voltage spikes from appearing at the input. Place this
capacitor near the IC.
Switch Output. This is the reference for the floating top gate driver.
Functional Block Diagram
Σ
Figure 5. Functional Block Diagram
AP5100
Document number: DS32130 Rev. 3 - 2
3 of 12
April 2012
? Diodes Incorporated
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