High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters.
Other Names: MAX1676EUBT, MAX1676EUB T
Docket:EVALUATION KIT AVAILABLE MAX1674/MAX1675/MAX1676
Compact, Step-Up DC-DC Converters LE AVAILAB General Description
The MAX1674/MAX1675/MAX1676 compact, high-efficiency, step-up DC-DC converters fit in small ÂµMAX
packages. They feature a built-in synchronous rectifier,
which improves efficiency and reduces size and cost
by eliminating the need for an external Schottky diode.
Quiescent supply current is only 16ÂµA.
The input voltage ranges from 0.7V to VOUT, where
VOUT can be set from 2V to 5.5V. Start-up is guaranteed from 1.1V inputs. The MAX1674/MAX1675/
MAX1676 have a preset, pin-selectable output for 5V or
3.3V. The outputs can also be adjusted to other voltages using two external resistors.
All three devices have a 0.3â„¦ N-channel MOSFET
power switch. The MAX1674 has a 1A current limit. The
MAX1675 has a 0.5A current limit, which permits the
use of a smaller inductor. The MAX1676 comes in a
10-pin ÂµMAX package and features an adjustable current limit and circuitry to reduce inductor ringing. ________________________Applications
Hand-Held Computers ____________________________Features
â™¦ 94% Efficient at 200mA Output Current
â™¦ 16ÂµA Quiescent Supply Current
â™¦ Internal Synchronous Rectifier (no external diode)
â™¦ 0.1ÂµA Logic-Controlled Shutdown
â™¦ LBI/LBO Low-Battery Detector
â™¦ Selectable Current Limit for Reduced Ripple
â™¦ Low-Noise, Anti-Ringing Feature (MAX1676)
â™¦ 8-Pin and 10-Pin ÂµMAX Packages
â™¦ Preassembled Evaluation Kit (MAX1676EVKIT) _______________Ordering Information
PART TEMP. RANGE PIN-PACKAGE MAX1674EUA
MAX1676EUB -40Â°C to +85Â°C
-40Â°C to +85Â°C
-40Â°C to +85Â°C 8 ÂµMAX
10 ÂµMAX PDAs
RF Tags Pin Configurations 1 to 3-Cell Hand-Held Devices Functional Diagrams
Typical Operating Circuit TOP VIEW FB 1
0.7V TO VOUT LBI 2 LBO 3 MAX1674
MAX1675 REF 4
ON SHDN OFF LX MAX1674 OUT
3.3V, 5V, OR
ADJ (2V TO 5.5V)
UP TO 300mA ...