- Current mode boost regulator
- Fast transient response
- 1% accurate output voltage
- 18V/3A integrated FET
- >90% efficiency
- 2.6V to 5.5V VIN supply
- 2 LDO controllers for VON and VOFF
- 2% output regulation
- VON-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)
The EL7640A, EL7641A, and EL7642A integrate a high performance boost regulator with 2 LDO controllers for VON and VOFF, a VON-slice circuit with adjustable delay and either one (EL7640A), three (EL7641A), or five amplifiers (EL7642A) for VCOM and VGAMMA applications.
The boost converter in the EL7640A, EL7641A, and EL7642A is a current mode PWM type integrating an 18V NHchannel 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 VON, VOFF, as well as providing start-up sequence control and fault protection.
The amplifiers are ideal for VCOM and VGAMMA 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 EL7640A, EL7641A, and EL7642A are specified for operation over the -40°C to +85°C temperature range.
- TFT-LCD panels
- LCD monitors
|VIN (min) (V)||2.6||2.3||3||2.5|
|VIN (max) (V)||5.5||5.5||5.5||5.5|
|VBOOST (min)||5.5 V||5.5 V||0 V|
|VBOOST (max)||20 V||20 V||15 V|
|Boost Current Limit (A)||3||2||1.5|
|VON/VP (min) (V)||5||5||7|
|VON/VP (max) (V)||30||32||33|
|VOFF/VN (min) (V)||-15||-15||-10|
|VOFF/VN (max) (V)||0||0||0|
|VLOGIC (min) (V)||N/A||1.2||0.8|
|VLOGIC (max) (V)||N/A||3.3||VIN|
|# of VCOM||1||N/A||1|
|# of Gamma||2||N/A||0|
|Features||Power sequencing, overload protection, thermal shutdown, VON slice||Start-up sequencing (exc. VLOGIC), fault protection||UVLO, UVP, OVP, OCP, and OTP Protection|