DESCRIPTION
The LT®3489 is a fi xed frequency step-up DC/DC converter
containing an internal 2.5A, 40V switch. The LT3489 is ideal for
large TFT-LCD panel power supplies. The LT3489 switches at 2MHz,
allowing the use of tiny, low profile inductors and low value
ceramic capacitors. Loop compensation can be either internal or
external, giving the user flexibility in setting loop compensation
and allowing optimized transient response with low ESR ceramic
output capacitors. Soft-start is controlled with an external
capacitor, which determines the input current ramp rate during
start-up.
The 8-lead MS8E package and high switching frequency ensure a low
profile overall solution less than 1.1mm high.
FEATURES
■ 2.5A, 0.12Ω, 40V Internal Switch
■ 2MHz Switching Frequency
■ Integrated Soft-Start Function
■ VIN Range: 2.6V to 16V
■ Adjustable Output from VIN to 40V
■ Low VCESAT Switch: 110mV at 1A (Typical)
■ 8V at 610mA from a 3.3V Input
■ Internal or External Loop Compensation
■ Small 8-Lead MS8E
APPLICATIONS
■ TFT-LCD Bias Supplies
■ GPS Receivers
■ DSL Modems
■ Local Power Supply
