MAX1542, MAX1542ETP, MAX1543 TFT LCD DC-to-DC Converter with Operational Amplifiers

Description

The MAX1542/MAX1543 include a high-performance boost regulator and two high-current operational amplifiers for active matrix, thin-film transistor (TFT), liquid-crystal displays (LCDs). Also included is a logic- controlled, high-voltage switch with adjustable delay. The MAX1543 includes an additional high-voltage load switch and features pin-selectable boost regulator switching frequency.

The step-up DC-to-DC converter is a high-frequency 640kHz (MAX1543)/1.2MHz (MAX1542/MAX1543) current-mode regulator with a built-in power MOSFET that allows the use of ultra-small inductors and ceramic capacitors. It provides fast transient response to pulsed loads while producing efficiencies over 85%.

The two easy-to-use, high-performance operational amplifiers can drive the LCD backplane (VCOM) and/or the gamma correction divider string. The devices feature high short-circuit current (150mA), fast slew rate (7.5V/µs), wide bandwidth (12MHz), and rail-to-rail inputs and outputs.

The MAX1542/MAX1543 are available in 20-pin thin QFN packages with a maximum thickness of 0.8mm for ultra-thin LCD panel design.

Key Features

Applications/Uses

Ultra-High-Performance Step-Up Regulator
- Fast Transient Response to Pulsed Load Using Current-Mode Control Architecture
- High-Accuracy Output Voltage (1.3%)
- Built-In 14V, 1.2A, 0.2Ω N-Channel Power
- MOSFET with Lossless Current-Sensing
- High Efficiency (85%)
- 8-Step Current-Controlled Digital Soft-Start
Two High-Performance Operational Amplifiers
- 150mA Output Short-Circuit Current
- 7.5V/µs Slew Rate
- 12MHz -3dB Bandwidth
- Rail-to-Rail Inputs/Outputs
- Unity Gain Stable
Logic-Controlled High-Voltage Switch with Adjustable Delay
Timer Delay Latch FB Fault Protection
Thermal Protection
2.6V to 5.5V Input Operating Voltage Range
3.6mA (Switching), 0.45mA (Not Switching) Quiescent Current
Ultra-Thin 20-Pin Thin QFN Package (5mm x 5mm x 0.8mm)

	Car-Navigation Displays
	LCD Monitor Panels
	Notebook Computer Displays
	PDAs

Key Specifications: Switch-Mode DC-DC Power Supplies

Part Number

Topology

V_IN (min) (V)

V_IN (max) (V)

Number of DC-DC Outputs

Digital/VID Programmed Output

Max. Adjustable V_OUT (V)

I_OUT (A)

Operating Current, I_CC (max) (mA)

Fixed Freq/PWM Operation

Operating Freq. (kHz)

Internal Power Switch(es)

Synchronous Rectifier

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX1542

Step-Up

2.6

5.5

1.5

6.5

Yes

1200

Yes

THIN QFN/20

$3.40 @ 1k

MAX1543

1200
600

$3.40 @ 1k

See All Switch-Mode DC-DC Power Supplies (421)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Reliability Reports


		Show FIT data for:

		Reliability Report: MAX1543ETP.pdf

		Request Reliability Report for:

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: 1-8 of 8

MAX1542ETP

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX1542ETP

THIN QFN;20 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T2055-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1542ETP-T

THIN QFN;20 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T2055-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1542ETP+

THIN QFN;20 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T2055+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1542ETP+T

THIN QFN;20 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T2055+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1543

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX1543ETP

THIN QFN;20 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T2055-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1543ETP-T

THIN QFN;20 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T2055-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1543ETP+

THIN QFN;20 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T2055+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1543ETP+T

THIN QFN;20 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T2055+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis