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)