MFG:LINEAR Package Cooled:QFN D/C:03+
MFG: LINEAR
Package Cooled: QFN
D/C: 03+
Description: The LTC®3709 is a single output, dual phase, synchronous step-down switching regulator....
The LTC®3709 is a single output, dual phase, synchronous step-down switching regulator. The controller uses a constant on-time, valley current control architecture to deliver very low duty cycles without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in input supply voltage. An internal phase-lock loop allows the LTC3709 to be synchronized to an external clock.
A TRACK pin is provided for tracking or sequencing the output voltage among several LTC3709 chips or an LTC3709 and other DC/DC regulators. Soft-start is accomplished using an external timing capacitor.
Fault protection is provided by an output overvoltage comparator and an optional short-circuit shutdown timer. The current limit level is user programmable. A wide supply range allows voltages as high as 31V to step down as low as 0.6V.
Input Supply Voltage (VCC, DRVCC) .......... 7V to 0.3V
Boosted Topside Driver Supply Voltage
(BOOST1, BOOST2) .................................. 37V to 0.3V
Switch Voltage (SW1, 2) ............................. 31V to 1V
SENSE1+, SENSE2+ Voltages ...................... 31V to 1V
SENSE1, SENSE2 Voltages .................. 10V to 0.3V
ION Voltage ............................................. 31V to 0.3V
(BOOST SW) Voltages .............................7V to 0.3V
RUN/SS, PGOOD Voltages .......................... 7V to 0.3V
TRACK Voltage ............................................7V to 0.3V
VRNG Voltage ................................ VCC + 0.3V to 0.3V
ITH Voltage ............................................. 2.7V to 0.3V
VFB Voltage ............................................. 2.7V to 0.3V
INTLPF, EXTLPF Voltages ........................ 2.7V to 0.3V
VOS
+, VOS
Voltages .................................................. 7V to 0.3V
FCB Voltage ................................................ 7V to 0.3V
Operating Temperature Range (Note 4) 40°C to 85°C
Junction Temperature (Note 2) ............................ 125°C
Storage Temperature Range
UH Package ........................................ 65°C to 125°C
G Package .......................................... 65°C to 150°C
LTC3709
PDF/DataSheet Download
IC CTRLR BUCK 2PH STEPDOWN 32QFN
IC CTRLR BUCK 2PH STEPDOWN 32QFN
IC CTRLR BUCK 2PH STEPDOWN 32QFN
IC CTRLR BUCK 2PH STEPDOWN 32QFN
The LTC®3708 is a dual, 2-phase synchronous step-down switching regulator with output voltage up/down tracking capability. The IC allows either coincident or ratiometric tracking. Multiple LTC3708s can be daisy-chained in applications requiring more than...
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