LTC3727EG-1#TR Linear Technology, LTC3727EG-1#TR Datasheet - Page 7

• Manufacturer Part Number: LTC3727EG-1#TR
• Description: IC REG SW SYNC 2PH STPDWN 28SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3727EG-1#TR

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 14 V
• Current - Output: 25A
• Frequency - Switching: 250kHz ~ 550kHz
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

TYPICAL PERFOR A CE CHARACTERISTICS
PI FU CTIO S
RUN/SS1, RUN/SS2 (Pins 1, 15/Pins 28, 13): Combina-
tion of Soft-Start, Run Control Inputs and Short-Circuit
Detection Timers (LTC3727 only). A capacitor to ground at
each of these pins sets the ramp time to full output current.
Forcing either of these pins back below 1.0V causes the IC
to shut down the circuitry required for that particular
controller. Latchoff overcurrent protection is also invoked
via this pin as described in the Applications Information
section (LTC3727 only).
35
33
31
29
27
25
U
–50 –25
Current Sense Pin Input Current
vs Temperature
V
OUT
= 5V
U
0
TEMPERATURE (°C)
3.50
3.45
3.35
3.30
3.25
3.20
3.40
25
–50
Undervoltage Lockout
vs Temperature
U
50
–25
75
G Package/UH Package
W
0
TEMPERATURE (°C)
100
3727 G22
25
U
125
50
75
10
6
0
8
4
2
100
–50 –25
EXTV
vs Temperature
3727 G25
125
CC
Switch Resistance
0
TEMPERATURE (°C)
25
SENSE1
Input to the Differential Current Comparators. The I
voltage and controlled offsets between the SENSE
SENSE
trip threshold.
SENSE1
Input to the Differential Current Comparators.
V
remotely-sensed feedback voltage for each controller from
an external resistive divider across the output.
50
OSENSE1
75
+
4.5
4.0
3.5
3.0
2.5
2.0
1.0
1.5
0.5
+
–
pins in conjunction with R
100
0
, SENSE2
, SENSE2
, V
–50
Shutdown Latch Thresholds
vs Temperature
3727 G23
LTC3727 ONLY
OSENSE2
125
–25
LTC3727/LTC3727-1
0
TEMPERATURE (°C)
+
–
(Pins 4, 12/Pins 1, 9): Receives the
(Pins 2, 14/Pins 30, 12): The (+)
(Pins 3, 13/Pins 31, 11): The (–)
THRESHOLD
700
400
300
200
600
500
100
LATCHOFF
25
0
– 50
Oscillator Frequency
vs Temperature
LATCH ARMING
50
– 25
75
0
TEMPERATURE (°C)
100
SENSE
3727 G26
V
25
V
V
PLLFLTR
PLLFLTR
PLLFLTR
125
50
set the current
= 1.2V
= 5V
= 0V
75
100
TH
–
3727 G24
3727fc
7
and
pin
125