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MAX1664
Active Matrix Liquid Crystal Display (AMLCD) Supply
Low-Noise, Integrated Solution Powers Active-Matrix TFT LCD Displays
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Status
Active: In Production.
Description
The MAX1664 integrates power-supply and backplane drive circuitry for
active-matrix thin-film-transistor (TFT) liquid crystal displays. Included are a single-output, pulse-width-modulation boost converter (0.25Ω switch), a dual-output (positive and negative) gate-driver supply using one inductor, an LCD backplane driver, and a simple phase-locked loop to synchronize all three
outputs.
High switching frequency (1MHz nominal) and phase-locked operation allow the use of small, minimum-height external components while maintaining low output noise. A +2.8V to +5.5V input voltage range allows operation with any logic supply. Output voltages are adjustable to +5.5V (DC-DC 1) and to +28V and-10V (DC-DC 2). The negative output voltage can be adjusted to -20V with additional components.
Also included are a logic-level shutdown and a "Ready" output (RDY) that signals when all three outputs are in regulation.
The boost-converter operating frequency can be set at 16, 24, or 32 times the backplane clock. This flexibility allows a high DC-DC converter frequency to be used with LCD backplane clock rates ranging from 20kHz to 72kHz. The MAX1664 is supplied in a 1.1mm-high TSSOP package.
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Data Sheet
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Key Features
- Integrates All Active Circuitry for Three DC-DC Converters
- Ultra-Small External Components (ceramic capacitors, 2µH to 5µH inductors)
- DC-DC Converters Phase-Locked to Backplane Frequency for Lowest Noise
- Low Operating Voltage (down to +2.8V)
- Adjustable Output Voltage from VIN to +5.5V
- Load Currents Up to 500mA
- Adjustable TFT Gate Driver Output:
- Positive, VIN to +28V
- Negative, 0 to -10V (-20V with added components)
- Includes 0.35Ω Backplane Driver
- 1µA Shutdown Current
- Power-Ready Output Signal
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Applications/Uses
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Diagram
 Typical Operating Circuit
Reliability Reports
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX1664CUP
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20-2*
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0°C to +70°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1664CUP-T
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Active |
TSSOP;20 pin
Land Pattern: Not Available
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0°C to +70°C
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See data sheet
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| MAX1664EUP
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20-2*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1664EUP+
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1664EUP+T
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1664EUP-T
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Active |
TSSOP;20 pin;45.2 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0116 (PDF)
Use pkgcode/variation: U20-2*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.
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Notes and Comments
PLL synchronizes all converters, simplifies noise filtering
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Information Index
Document Ref.: 19-1356
Rev 0;
1998-04-01
This page last modified: 2007-07-20
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