LTC3727-1 Linear Technology, LTC3727-1 Datasheet - Page 4

• Manufacturer Part Number: LTC3727-1
• Description: 2-Phase Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

LTC3727/LTC3727-1
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
3.3V Linear Regulator
V
V
V
PGOOD Output
V
I
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3727E/LTC3727E-1 are guaranteed to meet performance
specifications from 0 C to 70 C. Specifications over the –40 C to 85 C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: T
dissipation P
TYPICAL PERFOR A CE CHARACTERISTICS
SYMBOL
4
PGOOD
3.3OUT
3.3IL
3.3VL
PGL
PG
100
60
LTC3727EG/LTC3727EG-1: T
LTC3727EUH-1: T
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
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)
J
= T
CONSTANT
FREQUENCY
(BURST DISABLE)
0.1
A
+ (P
FORCED
CONTINUOUS
MODE
D
J
= T
• 34 C/W)
V
V
1
W
IN
OUT
A
= 15V
+ (P
= 8.5V
3727 G01
D
U
10
• 95 C/W)
A
100
90
80
70
60
50
and power
0.001
No Load
I
6V < V
6V < V
I
V
V
CONDITIONS
3.3
PGOOD
PGOOD
OSENSE
V
V
Efficiency vs Output Current
(Figure 13)
A
OSENSE
OSENSE
= 0mA to 10mA
= 25 C. V
IN
IN
= 2mA
= 5V
with Respect to Set Output Voltage
< 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
RUN/SS1, 2
to a specified voltage and measures the resultant V
1
V
OUT
3727 G02
= 5V
= 5V unless otherwise noted.
10
100
90
70
80
50
60
5
Efficiency vs Input Voltage
(Figure 13)
3.25
MIN
MAX
– 6
6
(see minimum on-time
www.DataSheet4U.com
INPUT VOLTAGE (V)
15
3.35
0.05
0.05
–7.5
TYP
0.5
0.1
7.5
OSENSE1, 2.
MAX
3.45
– 9.5
25
2.5
0.2
0.3
0.3
9.5
1
V
I
OUT
OUT
3727 G03
UNITS
= 3A
= 5V
3727f
35
%
%
%
%
%
V
V
A