The MAX761/MAX762 step-up switching regulators
provide high efficiency over a wide range of load currents,
delivering up to 150mA. A unique, current-limited
pulse-frequency-modulated (PFM) control scheme gives
the devices the benefits of pulse-width-modulated (PWM)
converters (high efficiency with heavy loads), while using
less than 110µA of supply current (vs. 2mA to 10mA for
PWM converters). The result is high efficiency over a wide
range of loads.
The MAX761/MAX762 input voltage range is 2V to 16.5V.
Output voltages are preset to 12V (MAX761) and 15V
(MAX762), or they can be set with two external resistors.
With a 5V input, the MAX761 guarantees a 12V, 150mA
output. Its high efficiency, low supply current, fast start-up
time, SHDN controlling capability, and small size make the
MAX761 ideal for powering flash memory.
The MAX761/MAX762 have an internal 1A power MOSFET, making them ideal for minimum-component, low- and
medium-power applications. These devices use tiny external components, and their high switching frequencies (up
to 300kHz) allow for small surface-mount magnetics.
For increased output drive capability or higher output voltages, use the MAX770–MAX773, which are similar in
design to the MAX761/MAX762, but drive external power
MOSFETs. For stepping up to 5V, see the MAX756/
MAX757 and MAX856-MAX859 data sheets.
♦ High Efficiency for a Wide Range of Load Currents
♦ 12V/150mA Flash Memory Programming Supply
♦ 110µA Max Supply Current
♦ 5µA Max Shutdown Supply Current
♦ 2V to 16.5V Input Voltage Range
♦ 12V (MAX761), 15V (MAX762) or Adjustable Output
♦ Current-Limited PFM Control Scheme
♦ 300kHz Switching Frequency
♦ Internal, 1A, N-Channel Power FET
♦ LBI/LBO Low-Battery Comparator
______________Ordering Information
PARTTEMP. RANGEPIN-PACKAGE
MAX761CPA
MAX761CSA0°C to +70°C8 SO
MAX761C/D0°C to +70°CDice*
MAX761EPA-40°C to +85°C8 Plastic DIP
MAX761ESA-40°C to +85°C8 SO
MAX761MJA-55°C to +125°C8 CERDIP**
MAX762CPA
MAX762CSA0°C to +70°C8 SO
MAX762C/D0°C to +70°CDice*
MAX762EPA-40°C to +85°C8 Plastic DIP
MAX762ESA-40°C to +85°C8 SO
MAX762MJA-55°C to +125°C8 CERDIP**
* Contact factory for dice specifications.
** Contact factory for availability and processing to MIL-STD-883.
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.