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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX16016 Datasheet

(MAX160xx) Low-Power uP Supervisory Circuits

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19-4145; Rev 6; 11/11
Low-Power µP Supervisory Circuits with
Battery-Backup Circuit and Chip-Enable Gating
General Description
The MAX16016/MAX16020/MAX16021 supervisory cir-
cuits monitor power supplies, provide battery-backup
control, and chip-enable (CE) gating to write protect
memory in microprocessor (µP)-based systems. These
low-power devices improve system reliability by providing
several supervisory functions in a small, single integrated
solution.
The MAX16016/MAX16020/MAX16021 perform four
basic system functions:
1) Provide a µP reset output during VCC supply power-
up, power-down, and brownout conditions.
2) Control VCC to battery-backup switching internally
to maintain data or low-power operation for memo-
ries, real-time clocks (RTCs), and other digital logic
when the main power is removed.
3) Provide memory write protection through internal
chip-enable gating during brownout.
4) Provide a combination of additional supervisory
functions listed in the Features section.
The MAX16016/MAX16020/MAX16021 operate from a
1.53V to 5.5V supply voltage and offer fixed reset
thresholds for monitoring 5V, 3.3V, 3V, 2.5V, and 1.8V
systems. Each device is available with either a push-
pull or open-drain reset output.
The MAX16016/MAX16020/MAX16021 are available in
small TDFN/TQFN packages and are fully specified for
an operating temperature range of -40°C to +85°C.
Applications
Main/Backup Power for RTCs, CMOS Memories
Industrial Control
GPS Systems
Set-Top Boxes
Point-of-Sale Equipment
Portable/Battery Equipment
Features
o System Monitoring for 5V, 3.3V, 3V, 2.5V, or 1.8V
Power-Supply Voltages
o 1.53V to 5.5V Operating Voltage Range
o Low 1.2µA Supply Current (0.25µA in Battery-
Backup Mode)
o 145ms (min) Reset Timeout Period
o Battery Freshness Seal
o On-Board Gating of CE Signals, 1.5ns
Propagation Delay (MAX16020/MAX16021)
o Debounced Manual Reset Input
o Watchdog Timer, 1.2s (typ) Timeout
o Power-Fail Comparator and Low-Line Indicator for
Monitoring Voltages Down to 0.6V
o Battery-On, Battery-OK, and Battery Test
Indicators
o Small 10-Pin TDFN or 16-Pin TQFN Packages
o UL®-Certified to Conform to IEC 60950-1
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX16016_TB_+T
-40°C to +85°C
10 TDFN-EP*
The first placeholder “_” designates all output options. Letter
“L” indicates push-pull outputs and letter “P” indicates open-
drain outputs. The last placeholder “_” designates the reset
threshold (see Table 1).
T = Tape and reel.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Ordering Information continued at end of data sheet.
Selector Guide located at end of data sheet.
Pin Configurations
TOP VIEW
16 15 14 13
BATT 1 +
12 RESET
MR 2
PFI 3
WDI 4
5
MAX16020
11 GND
10 PFO
EP
9 WDO
678
UL is a registered trademark of Underwriters Laboratories, Inc.
TQFN
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX16016 Datasheet

(MAX160xx) Low-Power uP Supervisory Circuits

No Preview Available !

Low-Power µP Supervisory Circuits with
Battery-Backup Circuit and Chip-Enable Gating
ABSOLUTE MAXIMUM RATINGS
VCC, BATT, OUT, BATT_TEST to GND.....................-0.3V to +6V
RESET, RESET, PFO, BATTOK, WDO, BATTON,
BATT_TEST, LL, (all open-drain) to GND .................-0.3V to +6V
RESET, RESET, BATTOK, WDO, BATTON,
LL (all push-pull) to GND......................-0.3V to (VOUT + 0.3V)
WDI, PFI to GND.......................................-0.3V to (VOUT + 0.3V)
CEIN, CEOUT to GND ..............................-0.3V to (VOUT + 0.3V)
MR to GND .................................................-0.3V to (VCC + 0.3V)
Input Current
VCC Peak Current.................................................................1A
VCC Continuous Current ...............................................250mA
BATT Peak Current .......................................................500mA
BATT Continuous Current ...............................................70mA
Output Current
OUT Short Circuit to GND Duration ....................................10s
RESET, RESET, BATTON ....................................................20mA
Continuous Power Dissipation (TA = +70°C)
10-Pin TDFN (derate 24.4mW/°C above +70°C) .......1951mW
16-Pin TQFN (derate 25mW/°C above +70°C) ..........2000mW
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
Soldering Temperature (reflow)
TDFN ............................................................................+260°C
TQFN............................................................................+240°C
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.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TDFN
Junction-to Ambient Thermal Resistance (θJA) ...........41°C/W
Junction-to Case Thermal Resistance (θJC) ..................9°C/W
TQFN
Junction-to Ambient Thermal Resistance (θJA) ...........40°C/W
Junction-to Case Thermal Resistance (θJC) ..................6°C/W
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.
ELECTRICAL CHARACTERISTICS
(VCC = 1.53V to 5.5V, VBATT = 3V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
Operating Voltage Range (Note 3)
Supply Current
Supply Current in
Battery-Backup Mode
SYMBOL
CONDITIONS
VCC, VBATT VCC or VBATT > VTH
ICC VCC > VTH
VCC = 1.62V
VCC = 2.8V
VCC = 3.6V
VCC = 5.5V
IBATT
VCC = 0V
VCC Switchover Threshold Voltage
VCC rising, VCC - VBATT
BATT Switchover Threshold
Voltage
BATT Standby Current
BATT Freshness Leakage Current
VCC to OUT On-Resistance
Output Voltage in
Battery-Backup Mode
RON
VOUT
VCC falling, VCC < VTH, VCC - VBATT
VCC > VBATT + 0.2V
VBATT = 5.5V
VCC = 4.75V, IOUT = 150mA
VCC = 3.15V, IOUT = 65mA
VCC = 2.35V, IOUT = 25mA
VCC = 1.91V, IOUT = 10mA
VBATT = 4.5V, IOUT = 20mA
VBATT = 2.5V, IOUT = 20mA
MIN TYP
0
1.2
1.9
2.3
3.4
0.25
0.1
x VCC
0
-10
1.4
1.7
2.1
2.6
VBATT - 0.1
VBATT - 0.15
MAX
5.5
2
3
3.5
5
0.5
UNITS
V
µA
µA
V
mV
+10 nA
20 nA
4.5
4.5
5.0
5.5
V
2 _______________________________________________________________________________________


Part Number MAX16016
Description (MAX160xx) Low-Power uP Supervisory Circuits
Maker Maxim Integrated Products
Total Page 21 Pages
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