1FEATURES

2• Input Voltage Range of 4.5V–24V

• Constant On-Time

• No Compensation Needed

• Maximum Load Current of 3A

• Switching Frequency of 100 kHz–500 kHz

• Constant Frequency Across Input Range

• TTL Compatible Shutdown Thresholds

• Low Standby Current of 12 μA

• 130 mΩ Internal MOSFET Switch

APPLICATIONS

• High Efficiency Step-Down Switching

Regulators

• LCD Monitors

• Set-Top Boxes

DESCRIPTION

The LM2696 is a pulse width modulation (PWM) buck

regulator capable of delivering up to 3A into a load.

The control loop utilizes a constant on-time control

scheme with input voltage feed forward. This provides

a topology that has excellent transient response

without the need for compensation. The input voltage feed forward ensures that a constant switching

frequency is maintained across the entire VIN range.

The LM2696 is capable of switching frequencies in

the range of 100 kHz to 500 kHz. Combined with an

integrated 130 mΩ high side NMOS switch the

LM2696 can utilize small sized external components

and provide high efficiency. An internal soft-start and

power-good flag are also provided to allow for simple

sequencing between multiple regulators.

The LM2696 is available with an adjustable output in

an exposed pad HTSSOP-16 package.