Datasheet

EL7640
TFT-LCD DC/DC with Integrated Amplifiers

Overview
Parametrics
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Typical Diagram

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Key Features

Current mode boost regulator

Fast transient response
1% accurate output voltage
18V/3A integrated FET
>90% efficiency

2.6V to 5.5V V_IN supply
2 LDO controllers for V_ON and V_OFF

2% output regulation
V_ON-slice circuit

High speed amplifiers

150mA short-circuit output current
12V/µs slew rate
12MHz -3dB bandwidth
Rail-to-rail inputs and outputs

Built-in power sequencing
Internal soft-start
Multiple overload protection
Thermal shutdown
32 Ld 5x5 thin QFN package
Pb-Free plus anneal available (RoHS compliant)

Description

The EL7640, EL7641, and EL7642 integrate a high performance boost regulator with 2 LDO controllers for V_ON and V_OFF, a V_ON-slice circuit with adjustable delay and either one (EL7640), three (EL7641), or five amplifiers (EL7642) for V_COM and V_GAMMA applications.

The boost converter in the EL7640, EL7641, and EL7642 is a current mode PWM type integrating an 18V N-channel MOSFET. Operating at 1.2MHz, this boost can operate in either P-mode for superior transient response, or in PI-mode for tighter output regulation.

Using external low-cost transistors, the LDO controllers provide tight regulation for V_ON, V_OFF, as well as providing start-up sequence control and fault protection. The amplifiers are ideal for V_COM and V_GAMMA applications, with 150mA peak output current drive, 12MHz bandwidth, and 12V/µs slew rate. All inputs and outputs are rail-to-rail.

Available in the 32 Ld thin QFN (5mm x 5mm) Pb-free packages, the EL7640, EL7641, and EL7642 are specified for operation over the -40°C to +85°C temperature range.