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MAX16023LTAY18+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
General Description
The MAX16023/MAX16024 low-power battery-backup cir-
cuits with a regulated output are capable of delivering up
to 100mA output current. The MAX16023/MAX16024
include a low-dropout regulator, a microprocessor (µP)
reset circuit, and a battery switchover circuit. Additional
available features include a manual reset, a power-fail
comparator, and a battery-on indicator. These devices
reduce the number of external components to minimize
board space and improve reliability.
The MAX16023/MAX16024 are ideally suited for provid-
ing power for backing up critical memory such as static
random-access memory (SRAM) or real-time clocks
(RTCs). The regulated output is powered by V
CC
when it
is present and switches over to the backup power dur-
ing brownout. The MAX16023/MAX16024 accept an
input voltage from 1.53V to 5.5V and provide fixed stan-
dard output voltages of 1.2V, 1.8V, 2.5V, 3.0V, and 3.3V.
The MAX16024 offers the ability to externally set the out-
put voltage using a resistive divider. All outputs are
available with push-pull or open-drain configurations.
The MAX16023 offers a power-fail comparator for monitor-
ing an additional voltage or for providing an early power-
fail warning. Another feature includes a manual-reset input
(MAX16023/MAX16024). The MAX16024 also features
a battery-on indicator and chip-enable gating function.
The MAX16023/MAX16024 are offered in 8- and 10-pin
TDFN packages and are fully specified from -40°C to
+85°C temperature range.
Applications
Main/Backup Power for RTCs/SRAM
Industrial Controls
GPS Systems
Set-Top Boxes
Point-of-Sale Equipment
Portable/Battery Equipment
Features
♦ System Monitoring for 5V, 3.3V, 3V, 2.5V, or 1.8V
Power-Supply Voltages
♦ 100mA Low-Dropout Regulator
♦ Factory-Trimmed and Adjustable Output Voltages
♦ 1.53V to 5.5V Operating Voltage Range
♦ Low-Power Consumption: 4µA (typ)
♦ Power-Fail Comparators for Monitoring Voltages
Down to 0.6V
♦ Battery-On Indicator
♦ Battery Freshness Seal
♦ On-Board Gating of CE Signals, 1.5ns
Propagation Delay (MAX16024)
♦ Debounced Manual-Reset Input
♦ 145ms (min) Reset Timeout Period
♦ Tiny 8-Pin and 10-Pin TDFN Packages
♦ UL
®
Certified to Conform to IEC 60950-1
MAX16023/MAX16024
Battery-Backup Circuits with
Regulated Output Voltage
________________________________________________________________
Maxim Integrated Products
1
19-4249; Rev 0; 8/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX16023_TA_ _ _+T
-40°C to +85°C
8 TDFN-EP*
MAX16024_TB_ _ _+T
-40°C to +85°C
10 TDFN-EP*
The first placeholder “_” designates reset output options. A letter
“L” in this placeholder indicates a push-pull output and letter “P”
indicates an open-drain output. The next placeholder “_” desig-
nates the reset threshold (Table 1). The last two placeholders
“_ _” designate output voltage (Table 2). For the MAX16024 with
adjustable output voltage version, there are no last two place-
holders.
+
Denotes a lead-free/RoHS-compliant package.
T = Tape and reel.
*
EP = Exposed pad.
Pin Configurations
8 7 6 5
1 2 3 4
PFO
GND
*EP *EP
*EP = EXPOSED PAD
RESET
OUT
PFI
MR
BATT
V
CC
MAX16023
TDFN
10 9 8 7
1 2 3 4
GND
OUT
RESET
CEOUT
BATT
CEIN
V
CC
MR
6
5
BATT ONSET
MAX16024
TDFN
+
+
UL is a registered trademark of Underwriters Laboratories, Inc.
MAX16023/MAX16024
Battery-Backup Circuits with
Regulated Output Voltage
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= 1.53V to 5.5V, V
BATT
= 3V, reset not asserted, T
A
= T
J
= -40°C to +85°C, C
OUT
= 10µF, unless otherwise noted. Typical val-
ues are at T
A
= T
J
= +25°C.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
, BATT, OUT to GND..........................................-0.3V to +6V
RESET, PFO, BATT ON (all open drain)
to GND..................................................................-0.3V to +6V
RESET, PFO, BATT ON (all push-pull)
to GND .................................................-0.3V to (V
OUT
+ 0.3V)
PFI, CEIN, CEOUT to GND.......................-0.3V to (V
OUT
+ 0.3V)
MR to GND .................................................-0.3V to (V
CC
+ 0.3V)
Input Current
V
CC
Peak Current.....................................................................1A
V
CC
Continuous Current ...............................................250mA
BATT Peak Current .......................................................500mA
BATT Continuous Current ...............................................70mA
Output Current
OUT Short Circuit to GND Duration ....................................10s
RESET, BATT ON, CEOUT..............................................20mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin TDFN (derate 24.4mW/°C above +70°C) .........1951mW
10-Pin TDFN (derate 24.4mW/°C above +70°C) .......1951mW
Thermal Resistance (Note 1)
θ
JA
(8-Pin and 10-Pin TDFN)........................................41°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage Range V
CC
,
V
BATT
(Note 3) 1.53 5.5 V
LDO = 1.2V 4.3 6
LDO = 1.8V 4.7 7
LDO = 2.5V 5.2 7.5
LDO = 3V 5.5 8
V
CC
= LDO + 0.5V,
no load
LDO = 3.3V 5.7 8
LDO = 1.2V 16 20
LDO = 1.8V 16 21
LDO = 2.5V 16 18.1
LDO = 3V 17 18.6
Supply Current I
CC
V
CC
= LDO + 0.5V,
I
OUT
= 20mA
LDO = 3.3V 17 19
µA
Supply Current in Battery-Backup
Mode
I
BATT
V
CC
= 0, V
BATT
= 3V,
no dropout, no load
3.5 5.26 µA
BATT Standby Current V
CC
> V
BATT
+ 0.2V -0.01 +0.01 µA
SET Reference Voltage V
SET
MAX16024_TB_, V
CC
= 2.2V 1.144 1.2 1.272 V
SET Input Leakage Current MAX16024_TB_, SET = 1.2V -20 +20 nA
Output Voltage Range V
OUT
MAX16024_TB_, V
CC
> V
OUT
1.8 5.25 V
LDO = 1.2V 1.145 1.2 1.270
LDO = 1.8V 1.704 1.8 1.900
LDO = 2.5V 2.368 2.5 2.634
LDO = 3V 2.837 3 3.165
Output Voltage Accuracy I
OUT
= 1mA
LDO = 3.3V 3.114 3.3 3.482
V
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial
.
MAX16023/MAX16024
Battery-Backup Circuits with
Regulated Output Voltage
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Line Regulation
V
CC
= (V
OUT
+ 1V) to (V
OUT
+ 2V),
I
OUT
= 1mA
0.2 1.0 %/V
Load Regulation V
CC
= V
OUT
+ 1V, I
OUT
= 1mA to 2mA 0.15 1.0 %
LDO = 1.2V 500
LDO = 1.8V 200
LDO = 2.5V 180
LDO = 3V 150
Dropout Voltage
I
OUT
= 50mA
(Note 4)
LDO = 3.3V 150
mV
V
CC
= 1.6V 75
Output Current Limit
V
CC
≥ 2V 150
mA
Battery Freshness Leakage
Current
V
BATT
= 5.5V 10 nA
RESET OUTPUT (RESET)
Reset Threshold V
TH
(See Table 1) V
V
CC
Falling to Reset Delay t
RD
V
CC
falling at 10V/ms 20 µs
Reset Timeout Period t
RP
V
CC
rising 145 215 285 ms
V
OUT
= 3.3V, I
SINK
= 3.2mA, RESET asserted 0.3
V
OUT
= 1.8V, I
SINK
= 1mA, RESET asserted 0.3RESET Output Low Voltage V
OL
V
OUT
= 1.2V, I
SINK
= 100µA, RESET asserted 0.3
V
RESET Output High Voltage
(Push-Pull Output)
V
OH
V
CC
≥ 1.1 x V
TH
, I
SOURCE
= 100µA,
RESET deasserted
V
OUT
- 0.3V V
RESET Output Leakage Current
(Open-Drain Output)
V
RESET
= 5.5V, reset deasserted 1 µA
POWER-FAIL COMPARATOR (PFI, PFO)
PFI Input Threshold V
PFT
V
PFI
falling, 1.6V ≤ V
CC
≤ 5.5V 0.570 0.590 0.611 V
PFI Input Hysteresis V
PFI-HYS
30 mV
PFI Input Current I
PFI
-1 +1 µA
V
OUT
= 1.8V, I
SINK
= 1mA, PFO asserted 0.3
PFO Output Low Voltage
V
OUT
=1.2V, I
SINK
= 100µA, PFO asserted 0.3
V
PFO Output High Voltage
(Push-Pull Output)
I
SOURCE
= 100µA, PFO deasserted V
OUT
- 0.3V V
PFO Leakage Current
(Open-Drain Output)
V
PFO
= 5.5V, PFO deasserted 1 µA
PFO Delay Time (V
PFI
+ 100mV) to (V
PFI
- 100mV) 20 µs
MANUAL RESET (MR)
Input Low Voltage V
IL
0.3 x V
CC
Input High Voltage V
IH
0.7 x V
CC
V
Pullup Resistance Pullup resistance to V
CC
20 30 kΩ
Glitch Immunity 100 ns
MR to Reset Delay 120 ns
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 1.53V to 5.5V, V
BATT
= 3V, reset not asserted, T
A
= T
J
= -40°C to +85°C, C
OUT
= 10µF, unless otherwise noted. Typical val-
ues are at T
A
= T
J
= +25°C.) (Note 2)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

MAX16023LTAY18+T

Mfr. #:
Buy MAX16023LTAY18+T
Manufacturer:
Maxim Integrated
Description:
Battery Management Battery Backup 1.8V-Ep
Lifecycle:
New from this manufacturer.
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