ATR0625P Datasheet, PDF (24/27 Pages) ATMEL Corporation – GPS Baseband Processor SuperSense

12. 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 12-1. Electrical Characteristics of LDOBAT
Parameter
Conditions
Min. Typ. Max. Unit Type*
Supply voltage
LDOBAT_IN
2.3
3.6
V
D
Supply voltage VBAT
1.5
3.6
V
D
Output voltage (VBAT18) If switch connects to LDOBAT_IN.
1.65 1.8 1.95 V
A
Output current (VBAT18) No external load allowed
1.5 mA D
Current consumption
LDOBAT_IN⁽¹⁾
After startup (sleep/backup mode), at
room temperature
15 µA
A
Current consumption
VBAT⁽¹⁾
After startup (backup mode and
LDOBAT_IN = 0V), at room
temperature
10 µA
A
Current consumption
After startup (normal mode), at room
temperature
1.5 mA C
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design
parameter
Note: 1. If no current is caused by outputs (pad output current as well as current across internal
pull-up resistors)
24 ATR0625P
4925G–GPS–06/08