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参数资料
| 型号： | ADP2301-EVALZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 15/28页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR ADP2301 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 3.3V |
| 电流 - 输出： | 1.2A |
| 输入电压： | 3 ~ 20 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 1.4MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ADP2301 |
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Data Sheet
SHORT-CIRCUIT PROTECTION
The ADP2300/ADP2301 include frequency foldback to prevent
output current runaway when there is a hard short on the output.
The switching frequency is reduced when the voltage at the FB pin
drops below a certain value, which allows more time for the
inductor current to decline, but increases the ripple current while
regulating the peak current. This results in a reduction in average
output current and prevents output current runaway. The corre-
lation between the switching frequency and the FB pin voltage
Table 5. Correlation Between the Switching Frequency
and the FB Pin Voltage
FB Pin Voltage Switching Frequency
V FB ≥ 0.6 V f SW
0.6 V > V FB > 0.2 V ? f SW
ADP2300/ADP2301
UNDERVOLTAGE LOCKOUT (UVLO)
The ADP2300/ADP2301 have fixed, internally set undervoltage
lockout circuitry. If the input voltage drops below 2.4 V, the
ADP2300/ADP2301 shut down and the MOSFET switch turns
off. After the voltage rises again above 2.8 V, the soft start
period is initiated, and the part is enabled.
THERMAL SHUTDOWN
If the ADP2300/ADP2301 junction temperature rises above 140 ° C,
the thermal shutdown circuit disables the chip. Extreme junction
temperature can be the result of high current operation, poor
circuit board design, or high ambient temperature. A 15 ° C
hysteresis is included so that when thermal shutdown occurs,
the ADP2300/ADP2301 do not return to operation until the on-
chip temperature drops below 125 ° C. After the devices recover
from thermal shutdown, a soft start is initiated.
V FB ≤ 0.2 V
? f SW
CONTROL LOOP
When a hard short (V FB ≤ 0.2 V) is removed, a soft start cycle
is initiated to regulate the output back to its level during normal
operation, which helps to limit the inrush current and prevent
possible overshoot on the output voltage.
The ADP2300/ADP2301 are internally compensated to minimize
external component count and cost. In addition, the built-in
slope compensation helps to prevent subharmonic oscillations
when the ADP2300/ADP2301 operate at a duty cycle greater
than or close to 50%.
Rev. C | Page 15 of 28
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP2302 | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad-Channel, 12-Bit, Serial Input, 4 mA to 20 mA |
| ADP2302_12 | 制造商:AD 制造商全称:Analog Devices 功能描述:2 A/3 A, 20 V, 700 kHz, Nonsynchronous Step-Down Regulators |
| ADP2302ARDZ | 功能描述:IC REG BUCK ADJ 2A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| ADP2302ARDZ-2.5 | 制造商:Analog Devices 功能描述: |
| ADP2302ARDZ-2.5-R7 | 功能描述:IC REG BUCK 2.5V 2A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
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