LTC3736 LINER [Linear Technology], LTC3736 Datasheet - Page 3

• Manufacturer Part Number: LTC3736
• Description: Dual 2-Phase, No RSENSE Synchronous Controller with Output Tracking
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
PARAMETER
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
(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
range, otherwise specifications are at T
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3736E is guaranteed to meet specified performance from
0 C to 70 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
Input Current
= T
+
– SW)( V
J
A
is calculated from the ambient temperature T
+ (P
D
according to the following formula:
D
•
SENSE(MAX)
JA
C/W)
)
A
= 25 C. V
CONDITIONS
I
I
(Note 5)
TRACK = 0.6V
Measured at V
SYNC/FCB Ramping Negative
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
TH
TH
OSC
OSC
PGOOD
A
L
L
L
L
FB
V
V
V
Minimum Synchronizable Frequency
Maximum Synchronizable Frequency
V
V
V
V
and power
= 3000pF
= 3000pF
= 3000pF
= 3000pF
IN
PLLLPF
PLLLPF
PLLLPF
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
= Floating
= 0V
= V
FB1
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 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.
0.525
0.667
0.66
MIN
115
110
193
185
480
260
650
850
–13
–16
75
70
10
7
FB
–0.12
0.833
–10.0
–13.3
1150
TYP
0.68
125
125
204
204
550
300
750
200
125
0.12
0.6
10.0
13.3
–4
10
10
20
40
40
50
40
85
85
voltage.
4
LTC3736
0.675
MAX
–0.5
140
100
215
223
600
340
825
250
135
–10
0.7
50
50
95
–7
0.5
1
13
16
TH
to a
UNITS
3
3736f
kHz
kHz
kHz
kHz
kHz
mV
mV
mV
mV
mV
mV
mV
mV
ms
nA
nA
ns
ns
ns
ns
%
%
%
%
%
%
V
V
A
A