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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 336kB) Download   E-Mail

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 (1 ohm) 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).

Key Features		Applications/Uses
Three Integrated DC-DC Converters 250kHz Current-Mode PWM Boost Regulator Up to +13V Main High-Power Output ±1% Accuracy High Efficiency (91%) Dual Charge-Pump Outputs Up to +40V Positive Charge-Pump Output Down to -40V Negative Charge-Pump Output Internal Supply Sequencing Internal Power MOSFETs +2.7V to +5.5V Input Supply 0.1µA Shutdown Current 0.5mA Quiescent Current Internal Soft-Start Power-Ready Output Ultra-Small External Components Thin TSSOP Package (1.1mm max)		Camcorders Digital Still Cameras Passive-Matrix LCD Displays PDAs TFT Active-Matrix LCD Displays

Diagram

Typical Operating Circuit

Reliability Reports

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Software/Models

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Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-4 of 4

MAX1779	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1779EUE			Active	TSSOP;16 pin;33.4 mm² Outline Drawing: 21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1779EUE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1779EUE+			Active	TSSOP;16 pin;33.4 mm² Outline Drawing: 21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1779EUE+T			Active	TSSOP;16 pin;33.4 mm² Outline Drawing: 21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

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MAX1748EVKIT

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