LTC3736-2 Linear Technology, LTC3736-2 Datasheet - Page 3

• Manufacturer Part Number: LTC3736-2
• Description: Synchronous Controller
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
range, otherwise specifications are at T
PARAMETER
Shutdown Threshold at RUN/SS
Start-Up Current Source
Regulated Feedback Voltage
Output Voltage Line Regulation
Output Voltage Load Regulation
V
TRACK Input Current
Overvoltage Protect Threshold
Overvoltage Protect Hysteresis
Auxiliary Feedback Threshold
Top Gate (TG) Drive 1, 2 Rise Time
Top Gate (TG) Drive 1, 2 Fall Time
Bottom Gate (BG) Drive 1, 2 Rise Time
Bottom Gate (BG) Drive 1, 2 Fall Time
Maximum Current Sense Voltage (∆V
(SENSE
Soft-Start Time
Oscillator and Phase-Locked Loop
Oscillator Frequency
Phase-Locked Loop Lock Range
Phase Detector Output Current
PGOOD Output
PGOOD Voltage Low
PGOOD Trip Level
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 LTC3736E-2 is guaranteed to meet specified performance
from 0°C to 85°C. Specifications over the –40°C to 85°C operating range
are assured by design, characterization and correlation with statistical
process controls.
Note 3: T
dissipation P
FB1,2
Sinking
Sourcing
T
J
= T
Input Current
+
– SW)
J
A
is calculated from the ambient temperature T
+ (P
D
according to the following formula:
D
• θ
JA
°C/W)
SENSE(MAX)
A
= 25°C. V
)
CONDITIONS
RUN/SS = 0V
0°C to 85°C (Note 5)
–40°C to 85°C
2.75V < V
I
I
(Note 5)
TRACK = 0.6V
Measured at V
SYNC/FCB Ramping Positive
C
C
C
C
IPRG = Floating
IPRG = 0V
IPRG = V
Time for V
Unsynchronized (SYNC/FCB Not Clocked)
SYNC/FCB Clocked
f
f
I
V
A
TH
TH
OSC
OSC
PGOOD
L
L
L
L
FB
PLLLPF = Floating
PLLLPF = 0V
PLLLPF = V
Minimum Synchronizable Frequency
Maximum Synchronizable Frequency
V
V
V
V
and power
IN
= 3000pF
= 3000pF
= 3000pF
= 3000pF
FB
FB
FB
FB
= 0.9V (Note 5)
= 1.7V
with Respect to Set Output Voltage
> f
< f
= 4.2V unless otherwise specified.
< 0.6V, Ramping Positive
< 0.6V, Ramping Negative
> 0.6V, Ramping Negative
> 0.6V, Ramping Positive
SYNC/FCB
SYNC/FCB
Sinking 1mA
IN
IN
FB1
< 9.8V (Note 5)
The
IN
to Ramp from 0.05V to 0.55V
FB
●
denotes specifications that apply over the full operating temperature
Note 4: Dynamic supply current is higher due to gate charge being
delivered at the switching frequency.
Note 5: The LTC3736-2 is tested in a feedback loop that servos I
specified voltage and measures the resultant V
Note 6: Peak current sense voltage is reduced dependent on duty cycle to
a percentage of value as shown in Figure 1.
●
●
●
●
●
●
0.594
0.591
0.525
0.667
0.45
0.66
MIN
220
150
320
480
260
650
850
–13
–16
0.4
10
7
www.DataSheet4U.com
FB
–0.12
0.833
–10.0
–13.3
1150
0.65
0.05
0.68
TYP
240
167
345
550
300
750
200
125
0.7
0.6
0.6
0.12
0.6
10.0
13.3
40
40
50
40
–4
10
10
20
voltage.
LTC3736-2
4
0.606
0.609
0.675
MAX
0.85
–0.5
260
185
370
600
340
825
250
–10
0.2
0.7
50
50
–7
0.5
1
1
13
16
TH
to a
UNITS
37362fa
mV/V
3
kHz
kHz
kHz
kHz
kHz
mV
mV
mV
mV
mV
ms
µA
nA
nA
µA
µA
ns
ns
ns
ns
%
%
%
%
%
%
V
V
V
V
V