LTC3727EG-1#TR Linear Technology, LTC3727EG-1#TR Datasheet - Page 4

• 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: -

LTC3727/LTC3727-1
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
R
I
3.3V Linear Regulator
V
V
V
PGOOD Output
V
I
V
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3727E/LTC3727E-1 are guaranteed to meet performance
specifications from 0°C to 85°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3727IG-1 is
guaranteed to meet performance specifications over the –40°C to 85°C
operating temperature range.
Note 3: T
dissipation P
TYPICAL PERFOR A CE CHARACTERISTICS
SYMBOL
4
PGOOD
PLLFLTR
3.3OUT
3.3IL
3.3VL
PGL
PG
PLLIN
100
60
90
80
70
50
40
30
20
10
0
0.001
Efficiency vs Output Current
and Mode (Figure 13)
OPERATION
Burst Mode
J
is calculated from the ambient temperature T
D
according to the following formulas:
0.01
PLLIN Input Resistance
Phase Detector Output Current
3.3V Regulator Output Voltage
3.3V Regulator Load Regulation
3.3V Regulator Line Regulation
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level, Either Controller
PARAMETER
OUTPUT CURRENT (A)
Sinking Capability
Sourcing Capability
CONSTANT
FREQUENCY
(BURST DISABLE)
0.1
FORCED
CONTINUOUS
MODE
V
V
1
W
IN
OUT
= 15V
= 8.5V
3727 G01
U
10
A
100
90
80
70
60
50
and power
0.001
f
f
No Load
I
6V < V
6V < V
I
V
V
CONDITIONS
PLLIN
PLLIN
3.3
PGOOD
PGOOD
OSENSE
V
V
Efficiency vs Output Current
(Figure 13)
A
OSENSE
OSENSE
= 0mA to 10mA
= 25°C. V
< f
> f
IN
IN
= 2mA
= 5V
with Respect to Set Output Voltage
OSC
OSC
< 30V (LTC3727-1)
< 30V (LTC3727)
0.01
The
Ramping Negative
Ramping Positive
V
OUTPUT CURRENT (A)
IN
= 20V
IN
●
V
V
IN
denotes the specifications which apply over the full operating
= 15V, V
IN
= 7V
V
= 15V
0.1
IN
Note 4: The LTC3727/LTC3727-1 are tested in a feedback loop that servos
V
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 6: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 7: The minimum on-time condition is specified for an inductor
peak-to-peak ripple current ≥ 40% of I
considerations in the Applications Information section).
= 10V
ITH1, 2
LTC3727EG/LTC3727EG-1/LTC3727IG-1: T
LTC3727EUH-1: T
RUN/SS1, 2
to a specified voltage and measures the resultant V
1
V
OUT
3727 G02
= 5V
= 5V unless otherwise noted.
10
J
= T
A
+ (P
100
90
70
80
50
60
●
D
5
Efficiency vs Input Voltage
(Figure 13)
• 34 °C/W)
3.25
MIN
MAX
– 6
6
(see minimum on-time
INPUT VOLTAGE (V)
15
J
= T
3.35
0.05
0.05
–7.5
TYP
–15
0.5
0.1
50
7.5
15
A
+ (P
D
OSENSE1, 2.
MAX
3.45
– 9.5
• 95 °C/W)
25
2.5
0.2
0.3
0.3
±1
9.5
V
I
OUT
OUT
3727 G03
UNITS
= 3A
= 5V
3727fc
kΩ
μA
μA
μA
35
%
%
%
%
%
V
V