DatasheetsPDF.com

MAX1779

Maxim
Part Number MAX1779
Manufacturer Maxim
Description Low-Power Triple-Output TFT LCD DC-DC Converter
Published May 6, 2005
Detailed Description 19-1795; Rev 0; 11/00 Low-Power Triple-Output TFT LCD DC-DC Converter General Description The MAX1779 triple-output DC-...
Datasheet PDF File MAX1779 PDF File

MAX1779
MAX1779

Overview
19-1795; Rev 0; 11/00 Low-Power Triple-Output TFT LCD DC-DC Converter General Description The MAX1779 triple-output DC-DC converter provides highly efficient regulated voltages required by small active matrix, thin-film transistor (TFT) liquid-crystal displays (LCDs).
One high-power DC-DC converter and two low-power charge pumps convert the +2.
7V to +5.
5V input supply voltage into three independent output voltages.
The primary high-power DC-DC converter generates a boosted output voltage (VMAIN) up to 13V that is regulated within ±1%.
The low-power BiCMOS control circuitry and the low on-resistance (1Ω) of the integrated power MOSFET allows efficiency up to 91%.
The 250kHz current-mode pulse-width modulation (PWM) architecture provides fast transient response and allows the use of ultra-small inductors and ceramic capacitors.
The dual charge pumps independently regulate one positive output (VPOS) and one negative output (VNEG).
These low-power outputs use external diode and capacitor stages (as many stages as required) to regulate output voltages up to +40V and down to -40V.
A proprietary regulation algorithm minimizes output ripple, as well as capacitor sizes for both charge pumps.
The MAX1779 is available in the ultra-thin TSSOP package (1.
1mm max height).
Features o Three Integrated DC-DC Converters o 250kHz Current-Mode PWM Boost Regulator Up to +13V Main High-Power Output ±1% Accuracy High Efficiency (91%) o Dual Charge-Pump Outputs Up to +40V Positive Charge-Pump Output Down to -40V Negative Charge-Pump Output o Internal Supply Sequencing o Internal Power MOSFETs o +2.
7V to +5.
5V Input Supply o 0.
1µA Shutdown Current o 0.
5mA Quiescent Current o Internal Soft-Start o Power-Ready Output o Ultra-Small External Components o Thin TSSOP Package (1.
1mm max) MAX1779 Ordering Information PART MAX1779EUE TEMP.
RANGE -40°C to +85°C PIN-PACKAGE 16 TSSOP Pin Configuration ________________________Applications TFT Active-Matrix LCD Displays Passive-Matrix LCD Displays P...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)