Rainbow Electronics ATR0625 - Manual (Page 24)

24
4925A–GPS–02/06
ATR0625 [Preliminary]
11. LDOBAT and Backup Domain
The LDOBAT is a built in low dropout voltage regulator which provides the supply voltage
VBAT18 for the RTC, backup SRAM, P9, P13, P22, P31, NSLEEP and NSHDN. The LDOBAT
voltage regulator switches in battery mode if LDOBAT_IN falls below 1.5V.
Table 11-1. Electrical Characteristics of LDOBAT
Parameter Conditions Min. Typ. Max. Unit
Supply voltage
LDOBAT_IN
2.3 3.6 V
Supply voltage VBAT 1.5 3.6 V
Output Voltage (VBAT18) If switch connects to LDOBAT_IN. 1.65 1.8 1.95 V
Output Current (VBAT18) 1.5 mA
Current consumption
LDOBAT_IN
(1)
After startup (sleep/backup mode), at
room temperature
15 µA
Current consumption
VBAT
(1)
After startup (backup mode and
LDOBAT_IN = 0V), at room
temperature
10 µA
Current consumption
After startup (normal mode), at room
temperature
1.5 mA
Note: 1. If no current is caused by outputs (pad output current as well as current across internal
pull-up resistors)