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SC1405D

Semtech
Part Number SC1405D
Manufacturer Semtech
Description High Speed Synchronous Power MOSFET Smart Driver
Published Apr 19, 2010
Detailed Description High Speed Synchronous Power www.DataSheet4U.com MOSFET Smart Driver POWER MANAGEMENT Description The SC1405D is a Dual-...
Datasheet PDF File SC1405D PDF File

SC1405D
SC1405D

Overview
High Speed Synchronous Power www.
DataSheet4U.
com MOSFET Smart Driver POWER MANAGEMENT Description The SC1405D is a Dual-MOSFET Driver with an internal Overlap Protection Circuit to prevent shoot-through.
Each driver is capable of driving a 3000pF load in 15ns rise/ fall time and has ULTRA-LOW propagation delay from input transition to the gate of the power FETs.
Adaptive Overlap Protection circuit ensures that the synchronous FET does not turn on until the top FET source has reached a voltage low enough to prevent shoot-through.
The delay between the bottom gate going low to the top gate transitioning high is externally programmable via a capacitor to minimize dead time.
The bottom FET may be disabled at light loads by keeping S_MOD low to trigger asynchronous operation, thus saving the bottom FET’s gate drive current and inductor ripple current.
An internal voltage reference allows threshold adjustment for an Output Over-Voltage protection circuitry, independent of the PWM controller.
The device provides overvoltage protection independent of the PWM feedback loop with a unique “adaptive OVP” comparator which rejects noise but responds quickly to a true OVP situation.
Under-Voltage-Lock-Out circuit is included to guarantee that both driver outputs are off when Vcc is less than or equal to 4.
4V (typ) at supply ramp up (4.
35V at supply ramp down).
A CMOS output provides status indication of the 5V supply.
A low enable input places the IC in standby mode, reducing supply current to less than 10µA.
SC1405D Features ‹ Fast rise and fall times (15ns withPRELIMINARY 3000pf load) ‹ 14ns max.
Propagation delay (BG going with low) ‹ Adaptive and programmable shoot-through protection ‹ Adaptive overvoltage protection ‹ Wide input voltage range (4.
5V - 25V) ‹ Programmable delay between FETs ‹ Power saving asynchronous mode control ‹ Output overvoltage protection/overtemp shutdown ‹ Under-Voltage lock-out and power ready signal ‹ Less than 10µA stand-by current (EN=low) ‹ Powe...


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