lt3742 Linear Technology Corporation, lt3742 Datasheet - Page 3

• Manufacturer Part Number: lt3742
• Description: Dual, 2-phase Step-down Switching Controller
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
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.
PARAMETER
FB Pin Bias Current
FB Pin Voltage Matching
Error Amplifi er Transconductance
Error Amplifi er Voltage Gain
V
V
Controller Switching Frequency
Switching Phase
Maximum Current Sense Voltage
Current Sense Matching
Current SENSE Pins Total Current
Gate Rise Time
Gate Fall Time
Gate On Voltage (V
Gate Off Voltage (V
PG Pin Voltage Low
Lower PG Trip Level (Relative to V
Lower PG Trip Level (Relative to V
Upper PG Trip Level (Relative to V
Upper PG Trip Level (Relative to V
PG Pin Leakage Current
PG Pin Sink Current
Bias Pin Voltage
SWB Pin Current Limit
SWB Pin Leakage Current
Bias Supply Switching Frequency
temperature range, otherwise specifi cations are at T
C
C
Pin Source Current
Pin Sink Current
G
G
– V
– V
SW
SW
)
)
FB
FB
FB
FB
)
)
)
)
CONDITIONS
V
V
V
V
Between Controllers
SENSE
SENSE
C
C
V
V
I
V
V
V
V
V
V
V
PG
FB
FB
FB
SENSE
LOAD
LOAD
IN
IN
FB
FB
FB
FB
PG
PG
SWB
= 100μA
= 5V, V
= 5V, V
= 0.8V, V
= 0.6V
= 1V
Increasing
Decreasing
Increasing
Decreasing
= 2V, V
= 0.5V
A
= 12V
= 25°C. V
= 3300pF
= 3300pF
–
–
–
, SENSE
, SENSE
= 3.3V
BIAS
BIAS
FB
The
C
= 1V
= 0.4V
= 12V
= 12V
+
+
●
IN
= 0V
= 3.3V
denotes the specifi cations which apply over the full operating
= 5V unless otherwise specifi ed.
Note 2: The LT3742E is guaranteed to meet performance specifi cations
from 0°C to 125°C operating junction temperature range. Specifi cations
over the – 40°C to 125°C operating junction temperature range are
assured by design, characterization and correlation with statistical process
controls.
●
V
IN
MIN
0.88
440
–10
200
250
6.0
–4
50
–7
7
4
+ 6.6 V
–1.0
0.20
0.01
TYP
IN
250
500
500
180
–10
–13
500
340
6.7
0.4
0.1
1.0
50
15
15
60
±5
40
40
60
10
0
7
+ 7 V
LT3742
IN
MAX
0.75
1.12
200
560
–13
–16
500
7.0
0.5
70
13
10
4
+ 7.7
1
UNITS
μmho
3
3742f
MHz
Deg
V/V
kHz
mV
mV
mA
mA
nA
μA
μA
μA
μA
μA
μA
ns
ns
%
%
%
%
%
V
V
V
V