MAX16023PTAS12+T Maxim Integrated Products, MAX16023PTAS12+T Datasheet - Page 14

• Manufacturer Part Number: MAX16023PTAS12+T
• Description: IC BATTERY BACKUP 1.2V 8TDFN-EP
• Manufacturer: Maxim Integrated Products

Specifications of MAX16023PTAS12+T

• Function: Back-Up Management
• Battery Type: All Battery Types
• Voltage - Supply: 1.53 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-WDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Battery-Backup Circuits with
Regulated Output Voltage
The MAX16023/MAX16024 provide battery-backup
functions. If a backup power source is not used, con-
nect BATT to GND.
Figure 5. Adding Hysteresis to the Power-Fail Comparator
14
MAX16023LTAL12+T
MAX16023LTAL18+T
MAX16023LTAL25+T
MAX16023LTAL33+T
MAX16023LTAM12+T
MAX16023LTAM18+T
MAX16023LTAM25+T
MAX16023LTAM33+T
MAX16023LTAT12+T
MAX16023LTAT18+T
MAX16023LTAT25+T
MAX16023LTAS12+T
MAX16023LTAS18+T
MAX16023LTAS25+T
MAX16023LTAR12+T
MAX16023LTAR18+T
MAX16023LTAR25+T
MAX16023LTAZ12+T
R1
R2
V
IN
PFO
______________________________________________________________________________________
C1*
+5V
PART
0
R3
TO µP
PFI
PFO
Operation Without a Backup
MAX16023
GND
V
+5V
V
CC
L
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
OUTPUT
V
TYPE
TRIP
0.1µF
V
H
V
V
V
WHERE V
THRESHOLD VOLTAGE.
TRIP
H
L
= R1 x
=
T H R ESH O L D
(
= V
V
VO L T A G E
V
PFT
PFT
IN
PFT
(
R ESET
V
+ V
4.63
4.63
4.63
4.63
4.38
4.38
4.38
4.38
3.08
3.08
3.08
2.93
2.93
2.93
2.63
2.63
2.63
2.32
Power Source
R2
x
PFT
IS THE POWER-FAIL
( V)
(
PFI - HYS
R1 + R2
-
R2
V
CC
*OPTIONAL
R3
)
- V
)
x
PFT
(
REGUL ATED
)
R1
R2
+ V
VO LTA GE
OU TPU T
+
PFT
R1
R3
1.2
1.8
2.5
3.3
1.2
1.8
2.5
3.3
1.2
1.8
2.5
1.2
1.8
2.5
1.2
1.8
2.5
1.2
( V)
+ 1
)
MAX16024LTBL12+T
MAX16024LTBL18+T
MAX16024LTBL25+T
MAX16024LTBL33+T
MAX16024LTBM12+T
MAX16024LTBM18+T
MAX16024LTBM25+T
MAX16024LTBM33+T
MAX16024LTBT12+T
MAX16024LTBT18+T
MAX16024LTBT25+T
MAX16024LTBS12+T
MAX16024LTBS18+T
MAX16024LTBS25+T
MAX16024LTBR12+T
MAX16024LTBR18+T
MAX16024LTBR25+T
MAX16024LTBZ12+T
When V
be removed without danger of triggering a reset pulse.
The device does not enter battery-backup mode when
V
The MAX16023/MAX16024 are relatively immune to
short duration, negative-going V
Resetting the µP when V
glitches is usually not desirable. A 0.1µF bypass
capacitor mounted close to the V
tional transient immunity.
For stable operation, connect a low-ESR 10µF (min) out-
put capacitor from OUT to GND. To reduce noise and
improve load-transient response and power-supply rejec-
tion, use larger output capacitor values.
CC
stays above the reset threshold voltage.
PART
CC
is above V
Negative-Going V
Replacing the Backup Battery
OUTPUT
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
TYPE
TH
, the backup power source can
Capacitor Selection and
Part Number Table
CC
T H R ESH O L D
experiences only small
Regulator Stability
VO L T A G E
R ESET
CC
4.63
4.63
4.63
4.63
4.38
4.38
4.38
4.38
3.08
3.08
3.08
2.93
2.93
2.93
2.63
2.63
2.63
2.32
( V)
pin provides addi-
CC
CC
Transients
transients.
R EG U L A T ED
VO L T A G E
O U T PU T
1.2
1.8
2.5
3.3
1.2
1.8
2.5
3.3
1.2
1.8
2.5
1.2
1.8
2.5
1.2
1.8
2.5
1.2
( V)