MAX16033 Datasheet, PDF (1/21 Pages) Maxim Integrated Products – Low-Power Battery Backup Circuits in Small μDFN Packages

19-0882; Rev 0; 7/07
Low-Power Battery Backup
Circuits in Small µDFN Packages
General Description
The MAX16033–MAX16040 supervisory circuits reduce
the complexity and number of components required for
power-supply monitoring and battery control functions
in microprocessor (µP) systems. The devices signifi-
cantly improve system reliability and accuracy com-
pared to other ICs or discrete components. The
MAX16033–MAX16040 provide µP reset, backup-bat-
tery switchover, power-fail warning, watchdog, and
chip-enable gating features.
The MAX16033–MAX16040 operate from supply volt-
ages up to 5.5V. The factory-set reset threshold voltage
ranges from 2.32V to 4.63V. The devices feature a man-
ual-reset input (MAX16033/MAX16037), a watchdog
timer input (MAX16034/MAX16038), a battery-on output
(MAX16035/MAX16039), an auxiliary adjustable reset
input (MAX16036/MAX16040), and chip-enable gating
(MAX16033–MAX16036). Each device includes a
power-fail comparator and offers an active-low push-
pull reset or an active-low open-drain reset.
The MAX16033–MAX16040 are available in 2mm x
2mm, 8-pin or 10-pin µDFN packages and are fully
specified from -40°C to +85°C.
Applications
Portable/Battery-
Powered Equipment
POS Equipment
Critical µP/µC Power
Monitoring
Set-Top Boxes
Controllers
Computers
Fax Machines
Industrial Control
Real-Time Clocks
Intelligent Instrument
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
Features
♦ Low 1.2V Operating Supply Voltage
♦ Precision Monitoring of 5.0V, 3.3V, 3.0V, and 2.5V
Power-Supply Voltages
♦ Independent Power-Fail Comparator
♦ Debounced Manual-Reset Input
♦ Watchdog Timer, 1.6s Timeout
♦ Battery-On Output Indicator
♦ Auxiliary User-Adjustable RESETIN
♦ Low 13µA Quiescent Supply Current
♦ Two Available Output Structures:
Active-Low Push-Pull Reset
Active-Low Open-Drain Reset
♦ Active-Low Reset Valid Down to 1.2V
♦ Power-Supply Transient Immunity
♦ 140ms (min) Reset Timeout Period
♦ Small 2mm x 2mm, 8-Pin and 10-Pin µDFN
Packages
Ordering Information
PART*
TEMP RANGE ^PIN-
PKG
PACKAGE CODE
MAX16033LLB_ _+T -40°C to +85°C 10 µDFN-10 L1022-1
MAX16033PLB_ _+T -40°C to +85°C 10 µDFN-10 L1022-1
MAX16034LLB_ _+T -40°C to +85°C 10 µDFN-10 L1022-1
MAX16034PLB_ _+T -40°C to +85°C 10 µDFN-10 L1022-1
Ordering Information continued on last page.
*These parts offer a choice of reset threshold voltages. From the
Reset Threshold Ranges table, insert the desired threshold volt-
age code in the blank to complete the part number. See Selector
Guide for a listing of device features.
+Denotes a lead-free package.
T = Tape and reel.
Selector Guide
PART
MR
WATCHDOG BATTON RESETIN ^CEIN/CEOU
MAX16033_
✓
✓
MAX16034_
✓
✓
MAX16035_
✓
✓
MAX16036_
✓
✓
MAX16037_
✓
MAX16038_
✓
MAX16039_
✓
MAX16040_
✓
Note: Replace “_” with L for push-pull or P for open-drain RESET and PFO outputs.
PFI, PFO
✓
✓
✓
✓
✓
✓
✓
✓
PIN-PACKAGE
10 µDFN-10
10 µDFN-10
10 µDFN-10
10 µDFN-10
8 µDFN-8
8 µDFN-8
8 µDFN-8
8 µDFN-8
________________________________________________________________ Maxim Integrated Products 1
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or visit Maxim’s website at www.maxim-ic.com.