LTC1628CG-SYNC#TR Linear Technology, LTC1628CG-SYNC#TR Datasheet - Page 4

• Manufacturer Part Number: LTC1628CG-SYNC#TR
• Description: IC REG SW 2PH SYNC STPDWN 28SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1628CG-SYNC#TR

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: Adj to 0.8V
• Current - Output: 3A
• Frequency - Switching: 140kHz ~ 310kHz
• Voltage - Input: 3.5 ~ 30 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

LTC1628-SYNC
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
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: T
dissipation P
Note 3: The LTC1628-SYNC is tested in a feedback loop that servos
V
TYPICAL PERFOR A CE CHARACTERISTICS
4
PGOOD
PGL
PG
ITH1,2
1000
600
100
800
400
200
60
LTC1628-SYNC: T
90
80
70
50
40
30
20
10
0
0
0.001
Efficiency vs Output Current
and Mode (Figure 14)
0
Supply Current vs Input Voltage
and Mode (Figure 14)
to a specified voltage and measures the resultant V
OPERATION
Burst Mode
J
is calculated from the ambient temperature T
5
SHUTDOWN
D
STANDBY
according to the following formulas:
0.01
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level, Either Controller
PARAMETER
OUTPUT CURRENT (A)
10
INPUT VOLTAGE (V)
BOTH
CONTROLLERS ON
J
15
= T
CONSTANT
FREQUENCY
(BURST DISABLE)
0.1
A
FORCED
CONTINUOUS
MODE
20
+ (P
D
25
• 95 °C/W)
1
W
V
V
IN
OUT
30
= 15V
1628 G01
1628 G04
= 5V
U
10
35
A
I
V
V
250
200
100
100
150
PGOOD
90
80
70
60
50
50
PGOOD
OSENSE
and power
V
V
CONDITIONS
0.001
OSENSE1, 2.
0
OSENSE
OSENSE
0
Efficiency vs Output Current
(Figure 14)
EXTV
A
= 25°C. V
= 2mA
= 5V
with Respect to Set Output Voltage
CC
Ramping Negative
Ramping Positive
10
The
0.01
Voltage Drop
V
OUTPUT CURRENT (A)
IN
●
IN
= 20V
CURRENT (mA)
V
V
20
IN
denotes the specifications which apply over the full operating
= 15V, V
IN
= 7V
V
= 15V
0.1
IN
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 5: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 6: 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
30
RUN/SS1, 2
1
V
40
OUT
1628 G02
1628 G05
= 5V
= 5V unless otherwise noted.
10
50
5.05
5.00
4.85
4.75
4.70
4.95
4.90
4.80
100
90
70
80
50
60
– 50
5
Efficiency vs Input Voltage
(Figure 14)
INTV
Voltage vs Temperature
– 25
MIN
MAX
– 6
CC
6
EXTV
and EXTV
(see minimum on-time
0
INPUT VOLTAGE (V)
TEMPERATURE (°C)
CC
15
SWITCHOVER THRESHOLD
–7.5
INTV
TYP
0.1
25
7.5
CC
CC
50
VOLTAGE
Switch
MAX
– 9.5
25
0.3
±1
9.5
75
V
I
OUT
OUT
100
1628syncfa
1628 G03
1628 G06
= 3A
UNITS
= 5V
125
35
µA
%
%
V