参数资料
| 型号： | A8670EESTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 13/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 20QFN |
| 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： | 可调至 0.6V |
| 输入电压： | 7 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 1MHz |
| 电流 - 输出： | 2A |
| 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： | 20-WFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 其它名称： | 620-1397-6 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
A8670
Fixed Frequency, 2 A Synchronous Buck Regulator
With Fault Warnings and Power OK
Table 3. Fault Handling and Reporting
A8670 Condition
90% < V FB < 115%
Comments
Normal operation
During start-up, the feedback voltage (V FB ) is
brought-up under control of the soft-start circuit
POK
Flag
High
Low
ˉFˉ ˉAˉˉˉ ˉUˉˉLˉ ˉTˉ
Flag
High
High
–
–
Action After Fault
After start-up, if an overload occurs for less
V FB < 85%
than the Hiccup Overload Duration (50 μ s), the
regulator will maintain switching operation
Low
High
Auto-recovery
After start-up, if an overload occurs for greater
than the Hiccup Overload Duration (50 μ s), the
Low
High
Auto-restart under control of soft-start
regulator will turn off and initiate a soft-start cycle
V FB > 115%
No current sourced from
Regulator immediately turns off; when V FB is
reduced to within regulation range, normal
Low
High
Auto-recovery
load into regulator output
operation will resume
Regulator continues to operate, controlling
V FB > 115%
Current sourced from load
to the Negative Valley Current Limit (I NLIM ),
–600 mA (typ); if the source current from the load
increases beyond the current limit level, although
Low
High
Auto-recovery
into regulator output
the current limit level still holds, current will flow
from the load to the input, perhaps resulting in an
increase in input voltage
V IN < 6 V (typ)
T J > 140°C (typ)
T J > 160°C (typ)
Regulator immediately turns off
Regulator keeps operating; if T J < 120°C (typ),
ˉFˉ ˉA ˉUˉˉLˉ ˉTˉ goes high
Regulator immediately turns off
Low
High
Low
High
Low
Low
Auto-restart under control of soft-start, when
V IN > 6.4 V (typ)
–
Auto-restart under control of soft-start, when
T J < 145°C
The voltage across the series switch is
Either the Enable pin (EN) or input voltage
LX pin shorted to GND
monitored; if the voltage exceeds 2 V (typ), the
regulator is latched off
Low
Low
(V IN ) must go low then high to restart under
control of soft-start
Either the Enable pin (EN) or input voltage
t on > 4 μ s (typ)
Internal bias or bootstrap
supply below the
undervoltage threshold
Regulator immediately turns off
Regulator immediately turns off
Low
Low
Low
High
(V IN ) must go low then high to restart under
control of soft-start
Auto-restart under control of soft-start when
above BIAS and BOOT UVLO thresholds
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
12
相关PDF资料 |
PDF描述 |
|---|---|
| A8697ELJ-T | IC REG BUCK ADJ 4A 8SOIC |
| A8698ELJ-T | IC REG BUCK ADJ 3A 8SOIC |
| A8732EEETR-T | IC PHOTOFLASH CAP CHARGER 8DFN |
| A8735EEETR-T | IC PHOTOFLASH CAP CHARGER 8DFN |
| A8739EEETR-T | IC PHOTOFLASH CHARGER 8-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A86724-000 | 制造商:TE Connectivity 功能描述:CMC-0587-00-9CS2968 - Cable Rools/Shrink Tubing |
| A-869 | 制造商:ETC MOLEX-INACTIVE 功能描述:Cross Referenced to MOLEX - Part: MOL19036-0003 |
| A86953-000 | 制造商:TE Connectivity 功能描述:Data Bus Components A Wide Selection Of Couplers Such As Micros, Boxes, Flat-Packs, And Ultra Light Weight Versions 制造商:TE Connectivity 功能描述:DATABUS HARNESSES - Bulk 制造商:TE Connectivity 功能描述:D-500-0467-2-612-012 |
| A8697 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Wide Input Voltage 4.0 A Step Down Regulator |
| A86976-000 | 功能描述:可复位保险丝 RoHS:否 制造商:TE Connectivity / Raychem 电流额定值: 电阻:0.08 Ohms (max) 最大直流电压: 保持电流:2.5 A 安装风格:Through Hole 端接类型: 跳闸电流:5 A 引线间隔: 系列:RXEF 工作温度范围:+ 85 C |
发布紧急采购，3分钟左右您将得到回复。