LTC3731CUH Linear Technology, LTC3731CUH Datasheet - Page 23

• Manufacturer Part Number: LTC3731CUH
• Description: IC SW REG CTRLR SYNC BUCK 32QFN
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3731CUH

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 6 V
• Frequency - Switching: 225kHz ~ 680kHz
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Power - Output: -

APPLICATIO S I FOR ATIO
which is less than one third of the normal, full load
conditions. Incidentally, since the load no longer dissi-
pates any power, total system power is decreased by over
90%. Therefore, the system actually cools significantly
during a shorted condition!
V
IN
R
BOLD LINES INDICATE HIGH,
SWITCHING CURRENTS.
KEEP LINES TO A MINIMUM
LENGTH.
IN
+
C
IN
U
U
W
Figure 11. Branch Current Waveforms
SW1
SW2
SW3
D2
D1
U
D3
L1
L2
L3
PC Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of
the IC. These items are also illustrated graphically in the
layout diagram of Figure 11. Check the following in the
PC layout:
R
R
R
SENSE2
SENSE3
SENSE1
C
OUT
3731 F11
+
V
OUT
LTC3731
23
3731fb
R
L