AT73C239 datasheet(22/31 Pages) ATMEL

22 / 31 page

6201C–PMAAC–31-Jul-07

AT73C239

13.4

LDO4

LDO4 generates 1.2V, 1.5V or 1.8V voltage from VBAT supply. Max DC load is 2 mA. The regu-

lator is activated when POR1 is released.

Table 13-10. LDO4 Parametric Table

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

BAT

Operating supply voltage

Backup Battery or Supercap

2.5

3.6

VO4

Output voltage

Factory programmed

1.7

1.8

1.9

Programmable

1.4

1.5

1.6

Programmable

1.1

1.2

1.3

Load current

DC load current

IQC

Quiescent current

µA

Shutdown current

0.5

µA

Startup time

200

µs

∆V

Line regulation static

2.5V < VBAT < 3.6V

100

∆V

Load regulation static

0 < I

4 < 2 mA

100

Table 13-11. LDO4 External Components

Schematic Reference

Description

COUT4

X5R 1 µF ± 20% capacitor

Table 13-12. onldo4 sel4[1:0] Control Modes

onldo4

sel4<1>

sel4<0>

VO4

XXHiZ

1001.8V

1011.5V

1101.2V

Table 13-13. trcore[1:0] Control Modes

trcore<1>

trcore<0>

VO4

00typ

+ 8 0mV

10- 80 mV

AT73C239 Datasheet(PDF) 22 Page - ATMEL Corporation

AT73C239 Datasheet(HTML) 22 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Datasheet Download

Link URL