LTC1628IG-SYNC Linear Technology, LTC1628IG-SYNC Datasheet - Page 3

• Manufacturer Part Number: LTC1628IG-SYNC
• Description: IC REG SW 2PH SYNC STPDWN 28SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1628IG-SYNC

• 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: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
UVLO
V
I
DF
I
V
V
I
I
V
TG1, 2 t
TG1, 2 t
BG1, 2 t
BG1, 2 t
TG/BG t
BG/TG t
t
INTV
V
V
V
V
V
Oscillator and Phase-Locked Loop
f
f
f
R
I
3.3V Linear Regulator
V
V
V
I
SENSE
RUN/SS1, 2
SCL1, 2
SDLHO
ON(MIN)
NOM
LOW
HIGH
3.3LEAK
PLLFLTR
OVL
RUN/SS1, 2
RUN/SS1, 2
SENSE(MAX)
INTVCC
LDO
LDO
EXTVCC
LDOHYS
3.3OUT
3.3IL
3.3VL
PLLIN
MAX
CC
INT
EXT
1D
2D
Linear Regulator
r
f
r
f
ON RUN/SS Pin ON Threshold
LT RUN/SS Pin Latchoff Arming
Maximum Duty Factor
Soft-Start Charge Current
Threshold
RUN/SS Discharge Current
Shutdown Latch Disable Current
Maximum Current Sense Threshold
TG Transition Time:
Rise Time
Fall Time
BG Transition Time:
Rise Time
Fall Time
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
Minimum On-Time
Internal V
INTV
EXTV
EXTV
EXTV
Nominal Frequency
Lowest Frequency
Highest Frequency
PLLIN Input Resistance
Phase Detector Output Current
3.3V Regulator Output Voltage
3.3V Regulator Load Regulation
3.3V Regulator Line Regulation
Leakage Current of 3.3V Regulator
in Shutdown
PARAMETER
Undervoltage Lockout
Feedback Overvoltage Lockout
Sense Pins Total Source Current
Sinking Capability
Sourcing Capability
CC
CC
CC
CC
Load Regulation
Voltage Drop
Switchover Voltage
Hysteresis
CC
Voltage
CONDITIONS
V
Measured at V
(Each Channel); V
In Dropout
V
V
V
Soft Short Condition V
V
V
V
V
(Note 5)
C
C
(Note 5)
C
C
C
C
Tested with a Square Wave (Note 6)
6V < V
I
I
I
V
V
V
f
f
No Load
I
6V < V
V
CC
CC
CC
PLLIN
PLLIN
3.3
IN
RUN/SS1, 2
RUN/SS1,
RUN/SS1,
RUN/SS1, 2
OSENSE1, 2
OSENSE1, 2
OSENSE1, 2
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
PLLFLTR
PLLFLTR
PLLFLTR
RUN/SS1, 2
A
Ramping Down
= 0 to 20mA, V
= 20mA, V
= 20mA, EXTV
= 0 to 10mA
= 25°C. V
< f
> f
IN
IN
= 3300pF
= 3300pF
= 3300pF
= 3300pF
= 3300pF Each Driver
= 3300pF Each Driver
OSC
OSC
< 30V, V
= 1.2V
= 0V
≥ 2.4V
< 30V
V
V
The
RUN/SS2
RUN/SS2
= 4.5V
= 0.5V
= 0.7V,V
= 0.7V,V
= 0V, V
= 1.9V
OSENSE1, 2
EXTVCC
IN
●
denotes the specifications which apply over the full operating
SENSE1
EXTVCC
= 15V, V
CC
EXTVCC
IN
Rising
Rising from 3V
SENSE1 – , 2 –
SENSE1 – , 2 –
Ramping Positive
= 5V
= 30V
OSENSE1, 2
–
= 4V
, 2
= 4V
RUN/SS1, 2
– = V
= 5V
= 5V
SENSE1
= 0.5V;
= 5V unless otherwise noted.
+
, 2
+ = 0V
●
●
●
●
●
●
LTC1628-SYNC
MIN
0.84
3.25
– 85
190
120
280
0.5
1.0
0.5
4.8
4.5
98
65
62
0.86
99.4
3.35
0.05
TYP
– 60
180
220
140
310
–15
3.5
1.2
1.5
4.1
1.6
5.0
0.2
4.7
0.2
0.5
75
75
50
50
40
40
90
90
80
50
15
10
2
MAX
0.88
3.45
160
250
160
360
1.9
4.5
5.2
1.0
0.2
85
88
90
90
90
80
50
4
4
5
2
1628syncfa
UNITS
3
kHz
kHz
kHz
mV
mV
mV
kΩ
µA
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
ns
ns
ns
%
%
%
%
V
V
V
V
V
V
V
V