Datasheet

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1.2V
32ms
170 sm
170 sm
32ms
PB_IN
EN_DCDC1
EN_LDO1
EN_DCDC2
EN_LDO3
EN_LDO4
EN_LDO2
Vout1
Vout2
VLDO1
VLDO4
VLDO2
VLDO3
Vbat
RESET
TPS65050, TPS65051, TPS65052
TPS65054, TPS65056
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:
V
L
= lower voltage threshold
V
H
= higher voltage threshold
V
REF
= reference voltage (1 V)
Example:
• V
L
= 3.3 V
• V
H
= 3.4 V
Set R5 = 100 k Ω
→ R3 + R4 = 240 k Ω
→ R4 = 3.03 k Ω
→ R3 = 237 k Ω
30 Submit Documentation Feedback Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS65050, TPS65051, TPS65052 TPS65054, TPS65056