19-1176; Rev 0; 12/96
High-Side, N-Channel MOSFET
Switch Driver
_______________General Description
The MAX1614 drives high-side, N-channel power MOSFETs
to provide battery power-switching functions in portable
equipment. N-channel power MOSFETs typically have
one-third the on-resistance of P-channel MOSFETs of simi-
lar size and cost. An internal micropower regulator and
charge pump generate the high-side drive output voltage,
while requiring no external components.
The MAX1614 also features a 1.5%-accurate low-battery
comparator that can be used to indicate a low-battery
condition, provide an early power-fail warning to the sys-
tem microprocessor, or disconnect the battery from the
load, preventing deep discharge and battery damage. An
internal latch allows for pushbutton on/off control with very
low current consumption. Off-mode current consumption
is only 6碌A while normal operation requires less than
25碌A. The MAX1614 is available in the space-saving
碌MAX package that occupies about 60% less space than
a standard 8-pin SO.
____________________________Features
o
Internal On/Off Latch
o
High-Side, N-Channel Power MOSFET Drive
o
25碌A (max) Quiescent Current
o
6碌A (max) Off Current
o
Requires No External Components
o
1.5%-Accurate Low-Battery Detector
o
Space-Saving 碌MAX Package
o
5V to 26V Input Voltage Range
o
Drives Single or Back-to-Back MOSFETs
o
Controlled Turn-On for Low Inrush Current
MAX1614
________________________Applications
Notebook Computers
Portable Equipment
Hand-Held Instruments
Battery Packs
______________Ordering Information
PART
MAX1614C/D
TEMP. RANGE
0掳C to +70掳C
PIN-PACKAGE
Dice*
8 碌MAX
MAX1614EUA
-40掳C to +85掳C
*Contact
factory for dice specifications.
__________Typical Operating Circuit
N
N
LOAD
__________________Pin Configuration
OPTIONAL FOR
REVERSE CURRENT
PROTECTION
GATE
SRC
ON
ON 1
BATT
R1
LBI
R2
GND
LBO
8
BATT
SRC
GATE
GND
TOP VIEW
MAX1614
OFF
OFF 2
LBO 3
LBI 4
MAX1614
7
6
5
碌MAX
________________________________________________________________
Maxim Integrated Products
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
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