1FEATURES

2? Input Voltage from 2.9V to 18V

? Output Voltage Adjustable from 0.6V to 5.5V

? Feedback Accuracy: ±1%

? Low-Side Sensing, Programmable Current

Limit without Sense Resistor

? Input Under Voltage Lockout

? Hiccup Mode Current Limit Protection

Eliminates Thermal Runaway During Fault

Conditions start?

Internal Soft Start with Tracking Capability

? 200 kHz to 1.5 MHz Switching Frequency,

Synchronizable

? On-Chip Gate Drivers

? Soft Output Discharge During Shutdown

? Startup into Output Pre-Bias

? Operation from a Single Input Rail

? Adaptive Duty Cycle Limit

? TSSOP-16 Package

DESCRIPTION

The LM3495 is a PWM buck regulator which

implements a unique emulated peak current mode

control. This control method eliminates the switching

noise which typically limits current mode operation at

extremely short duty cycles and high operating

frequency. The switching frequency is programmable

between 200 kHz and 1.5 MHz, and can also be

synchronized to an external clock. The LM3495 is

also very fault tolerant with both switch node short,

hiccup mode, and adaptive duty cycle limit protection.

A 0.6V 1% reference and glitch free pre-biased start?

up ensure the most demanding digital loads operate

reliably. Internal soft start and the ability to track the

output of another supply make the LM3495 versatile

and efficient.

APPLICATIONS

? Wide Input Voltage Buck Converters with Low

Voltage, High Accuracy Outputs

? Core Logic Regulators

? High-Efficiency Buck Regulation