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参数资料
| 型号： | TPS3807A30DCKT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封装： | GREEN, PLASTIC, SC-70, 5 PIN |
| 文件页数： | 7/12页 |
| 文件大小： | 388K |
| 代理商： | TPS3807A30DCKT |
www.ti.com
FUNCTIONAL BLOCK DIAGRAM
GND
1.225V
Reference
RSTSENSE
RSTVDD
SENSE
V
DD
TPS3807
TIMING DIAGRAM
V
GOOD
V
ON
0.8V
0V
V
DD
RSTSENSE
RSTVDD
Time
V
LOW
V
OFF
t
D = Reset Delay
= Undefined State
SBVS061B – AUGUST 2005 – REVISED DECEMBER 2006
Table 1. PIN DESCRIPTIONS
NAME
PIN NO.
I/O
DESCRIPTION
RSTSENSE is an open-drain output that is driven to a low-impedance state when the
SENSE input is lower than the threshold voltage VSENSE IT–. RSTSENSE will remain low until
RSTSENSE
1
O
SENSE is above VSENSE IT+. A pull-up resistor from 10k to 1M should be used on this
pin, and allows the reset pin to attain voltages higher than VDD.
GND
2
I
Ground
RSTVDD is an open-drain output that is driven to a low-impedance state when the VDD input
is lower than the threshold voltage VDD IT–. RSTVDD will remain low until VDD is above
RSTVDD
3
O
VDD IT+. A pull-up resistor from 10k to 1M should be used on this pin, and allows the
reset pin to attain voltages higher than VDD.
Supply voltage for the device and sense input for fixed-threshold RSTVDD outputs. A 0.1
F
VDD
4
I
ceramic capacitor should be placed close to this pin for best VIT stability.
Sense input for the adjustable-threshold RSTSENSE outputs. A resistor divider from the
SENSE
5
I
sense voltage can be attached to this pin to set the thresholds to the desired voltages. A
0.1
F ceramic capacitor should be placed close to this pin for best V
IT stability.
Figure 1. TPS3807 Timing Diagram Showing Reset Timing (SENSE resistor divider set to 3.6V)
4
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