参数资料
型号: TPS65054RSMT
厂商: TEXAS INSTRUMENTS INC
元件分类: 电源管理
英文描述: 6-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32
封装: 4 X 4 MM, 0.40 MM PITCH, GREEN, PLASTIC, QFN-32
文件页数: 24/40页
文件大小: 1234K
代理商: TPS65054RSMT
www.ti.com
1.2V
32ms
170 s
m
170 s
m
32ms
PB_IN
EN_DCDC1
EN_LDO1
EN_DCDC2
EN_LDO3
EN_LDO4
EN_LDO2
Vout1
Vout2
VLDO1
VLDO4
VLDO2
VLDO3
Vbat
RESET
SLVS710A – JANUARY 2007 – REVISED AUGUST 2007
Figure 25. Power Up Timing
TPS65051, TPS65052, TPS65054 and TPS65056 contain a comparator that are used to supervise a voltage
connected to an external voltage divider, and generate a reset signal if the voltage is lower than the threshold.
The rising edge is delayed by 100 ms at the open drain RESET output. The values for the external resistors R3
to R5 are calculated as follows:
VL = lower voltage threshold
VH = higher voltage threshold
VREF = reference voltage (1 V)
Example:
V
L = 3.3 V
V
H = 3.4 V
Set R5 = 100 k
→ R3 + R4 = 240 k
→ R4 = 3.03 k
→ R3 = 237 k
30
Copyright 2007, Texas Instruments Incorporated
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