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参数资料
| 型号： | ADP1864-EVALZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION ADP1864 |
| 产品培训模块： | Power Line Monitoring |
| 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： | 3A |
| 输入电压： | 9 ~ 12V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 580kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ADP1864 |
| 产品目录页面： | 791 (CN2011-ZH PDF) |
| 相关产品： | ADP1864AUJZ-R7DKR-ND - IC REG CTRLR BUCK PWM TSOT23-6 ADP1864AUJZ-R7CT-ND - IC REG CTRLR BUCK PWM TSOT23-6 ADP1864AUJZ-R7TR-ND - IC REG CTRLR BUCK PWM TSOT23-6 |
Data Sheet
SHORT-CIRCUIT PROTECTION
If there is a short across the output load, the voltage at the
feedback pin (FB) drops rapidly. When the FB voltage drops
below 0.35 V, the ADP1864 reduces the oscillator frequency
to 190 kHz. The increase in the oscillator period allows the
inductor additional time to discharge, preventing the output
current from running away. Once the output short is removed
and the feedback voltage increases above the 0.35 V threshold,
the oscillator frequency returns to 580 kHz.
UNDERVOLTAGE LOCKOUT (UVLO)
To prevent erratic operation when the input voltage drops
below the minimum acceptable voltage, the ADP1864 has an
undervoltage lockout (UVLO) feature. If the input voltage
drops below 2.90 V, PGATE is pulled high and the ADP1864
ADP1864
OVERVOLTAGE LOCKOUT PROTECTION (OVP)
The ADP1864 provides an overvoltage protection feature to
protect the system against output short circuits to a higher
voltage supply. If the feedback voltage increases to 0.885 V,
PGATE is held high, turning the external FET off. The FET
continues to be held high until the voltage at FB decreases to
0.84 V, at which time the ADP1864 resumes normal operation.
SOFT START
The ADP1864 includes a soft start feature that limits the rate of
increase in the inductor current once the part is enabled. Soft
start is activated when the input voltage is increased above the
UVLO threshold or COMP is released from GND. Soft start
limits the inrush current at the input and limits the output
voltage overshoot. The soft start control slope is set internally.
continues to draw its typical quiescent current. Current consump-
tion continues to drop toward the shutdown current as input
voltage is reduced. The ADP1864 is re-enabled and begins
switching once the IN voltage is increased above the UVLO
rising threshold (3.0 V).
Rev. C | Page 9 of 16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1870 | 制造商:AD 制造商全称:Analog Devices 功能描述:Synchronous Buck Controller with Constant On-Time and Valley Current Mode |
| ADP1870-0.3-EVALZ | 功能描述:BOARD EVAL FOR ADP1870-0.3 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| ADP1870-0.6-EVALZ | 功能描述:BOARD EVAL FOR ADP1870-0.6 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| ADP1870-1.0-EVALZ | 功能描述:BOARD EVAL FOR ADP1870-1.0 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| ADP1870ACPZ-0.3-R7 | 功能描述:IC REG CTRLR BUCK PWM CM 10LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
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