LT3782

Features:

2-Phase Operation Reduces Required Input and Output Capacitance
Programmable Switching Frequency: 150kHz to 500kHz
6V to 40V Input Range
10V Gate Drive with VCC 13V
High Current Gate Drive (4A)
Programmable Soft-Start and Current Limit
Programmable Slope Compensation for High Noise Immunity
MOSFET Gate Signals with Programmable Falling Edge Delay for External Synchronous Drivers
Programmable Undervoltage Lockout
Programmable Duty Cycle Clamp (50% or Higher)
Thermally Enhanced 28-Lead SSOP Package


Application

Industrial Equipment
Telecom Infrastructure
Interleaved Isolated Power Supply


Pinout




Specifications

VCC Supply Voltage .................................................. 40V
GBIAS, GBIAS1, GBIAS2 Pin (Externally Forced)
............................................................................ 14V
SYNC, RUN Pin........................................................ 30V
Operating Junction Temperature Range (Notes 2, 3)
.......................................................... 40°C to 125°C
Storage Temperature Range ................. 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
SS ................................................................0.3V to 6V
SENSE1+, SENSE2+, SENSE1, SENSE2
................................................................0.3V to 2V

Description

The LT®3782 is a current mode two phase step-up DC/DC converter controller. Its high switching frequency (up to 500kHz) and 2-phase operation reduce system filtering capacitance and inductance requirements.

With 10V gate drive (VCC 13V) and 4A peak drive current, the LT3782 can drive most industrial grade high power MOSFETs with high efficiency. For synchronous applications,
the LT3782 provides synchronous gate signals with programmable falling edge delay to avoid cross conduction
when using external MOSFET drivers. Other features include programmable undervoltage lockout, soft-start,
current limit, duty cycle clamp (50% or higher) and slope compensation.

The LT3782 is available in a thermally enhanced 28-lead SSOP package.