Features: • 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)Application• TFT-LCD panels
• LCD monitors
• Notebooks
• LCD-TVsPinout
SpecificationsIN, CTL to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . -0.3V to +6.5V
COMP, FB, FBP, FBN, DEL, REF to AGND. . . . .. .. .. .. .. .. .. -0.3V to VIN+0.3V
PGND, BGND to AGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. ..±0.3V
LX to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. -0.3V to +24V
SUP to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . -0.3V to +18V
DRVP, SRC to AGND . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. ..-0.3V to +36V
POS1, NEG1, OUT1, POS2, NEG2, OUT2, POS3, OUT3,
POS4, NEG4, OUT4, POS5, OUT5 to AGND . .. .. .. .. .. .. . -0.3V to VSUP+0.3V
DRVN to AGND . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. .. VIN -20V to VIN +0.3V
COM, DRN to AGND. . . . . . . . . . . . . . . . . . .. .. .. .. .. .. ... -0.3V to VSRC +0.3V
LX Maximum Continuous RMS Output Current. . . . . . . . . . . . .. .. .. .. .. .. 1.6A
OUT1, OUT2, OUT3, OUT4, OUT5
Maximum Continuous Output Current . . . . . . . . . . . . . . . . . .. .. .. .. .. . ±75mA
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. ..-65°C to +150°C
Maximum Continuous Junction Temperature . . . . . . . . . . . .. .. .. .. .. . +125°C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. ..See Curves
Operating Ambient Temperature . . . . . . . . . . . . . . . .-40°C to +85°CDescriptionThe EL7640, EL7641, and EL7642 integrate a high performance boost regulator with 2 LDO controllers for VON and VOFF, a VON-slice circuit with adjustable delay and either one (EL7640), three (EL7641), or five amplifiers (EL7642) for VCOM and VGAMMA 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 EL7640, EL7641, and EL7642 provide tight regulation for VON, VOFF, as well as providing start-up sequence control and fault protection.
The amplifiers EL7640, EL7641, and EL7642 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 EL7640, EL7641, and EL7642 are specified for operation over the -40°C to +85°C temperature range.
EL7640 Data Sheet
