1FEATURES

2• Integrated 42V, 160mΩ N-Channel MOSFET

• Ultra-Wide Input Voltage Range from 7V to 42V

• Internal Bias Regulator

• Adjustable Output Voltage from 1.225V

• 1.5% Feedback Reference Accuracy

• Current Mode Control with Emulated Inductor

Current Ramp by•

Single Resistor Oscillator Frequency Setting

• Oscillator Synchronization Input

• Programmable Soft-Start

• Shutdown / Standby Input

• Wide Bandwidth Error Amplifier

• Thermal Shutdown

DESCRIPTION

The LM25005 switching regulator features all of the

functions necessary to implement an efficient, high

voltage buck regulator using a minimum of external

components. This easy to use regulator includes a

42V, 160mΩ, N-channel MOSFET, with an output

current capability of 2.5 Amps. The regulator control method is based upon current mode control utilizing

an emulated current ramp. Current mode control

provides inherent line voltage feed-forward, cycle-by•

cycle current limiting and ease of loop compensation.

The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit,

allowing reliable control of very small duty cycles

necessary in high input voltage applications. The

operating frequency is programmable from 50kHz to

500kHz. An oscillator synchronization pin allows

multiple LM25005 regulators to self-synchronize or to

be synchronized to an external clock. Additional

protection features include: current limit, thermal

shutdown and remote shutdown capability. The

device is available in a power enhanced HTSSOP

package featuring an exposed die attach pad to aid

thermal dissipation.

Package

• HTSSOP (Exposed Pad)