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参数资料
| 型号： | LM3712YFBPX-308 |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA9 |
| 封装： | MICRO, BUMP, SMD-9 |
| 文件页数： | 7/14页 |
| 文件大小： | 311K |
| 代理商： | LM3712YFBPX-308 |
Connection Diagram
Top View
(looking from the coating side)
micro SMD 9 Bump Package
BPA09
20011901
Pin Descriptions
Bump No.
Name
Function
A1
MR
Manual-Reset input. When MR is less than V
MRT (Manual Reset Threshold) RESET is engaged.
B1
V
CC
Power Supply input.
C1
RESET
Reset Logic Output. Pulses low for t
RP (Reset Timeout Period) when triggered, and stays low
whenever V
CC is below the reset threshold or when MR is below VMRT. It remains low for tRP after
either V
CC rises above the reset threshold, or after MR input rises above VMRT.
C2
PFO
Power-Fail Logic Output. When PFI is below V
PFT PFO goes low; otherwise, PFO remains high.
C3
WDO
Watchdog Output. If no digital activity is detected on WDI (Watchdog Input) for a period exceeding
t
WD, this output pulls low.
B3
GND
Ground reference for all signals.
A3
WDI
Watchdog Input Transition Monitor: If no transition activity occurs for a period exceeding t
WD
(Watchdog Timeout Period), reset is engaged.
A2
PFI
Power-Fail Comparator Input. When PFI is less than V
PFT (Power-Fail Reset Threshold), the PFO
goes low; otherwise, PFO remains high.
B2
NC
No Connect. Test input used at factory only. Leave floating.
www.national.com
2
LM3712
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