LTC3890EGN-1 LINER [Linear Technology], LTC3890EGN-1 Datasheet - Page 4

• Manufacturer Part Number: LTC3890EGN-1
• Description: 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
LTC3890-1
SYMBOL
V
V
V
Oscillator and Phase-Locked Loop
f
f
f
f
f
f
PGOOD1 Output
V
I
V
t
junction temperature range, otherwise specifi cations are at T
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Ratings for extended periods may affect device reliability and
lifetime.
Note 2: The LTC3890E-1 is guaranteed to meet performance specifi cations
from 0°C to 125°C. Specifi cations over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3890I-1 is guaranteed
over the full –40°C to 125°C operating junction temperature range.
Note 3: T
dissipation P
4
25kΩ
65kΩ
105kΩ
LOW
HIGH
SYNC
PGOOD
PG
LDOEXT
EXTVCC
LDOHYS
PGL
PG
T
J
= T
J
A
is calculated from the ambient temperature T
+ (P
D
according to the following formula:
PARAMETER
INTV
EXTV
EXTV
Programmable Frequency
Programmable Frequency
Programmable Frequency
Low Fixed Frequency
High Fixed Frequency
Synchronizable Frequency
PGOOD1 Voltage Low
PGOOD1 Leakage Current
PGOOD1 Trip Level
Delay for Reporting a Fault
D
• 90°C/W)
CC
CC
CC
Load Regulation
Switchover Voltage
Hysteresis
A
CONDITIONS
I
EXTV
R
R
R
V
V
PLLIN/MODE = External Clock
I
V
V
V
and power
CC
PGOOD
V
Hysteresis
V
Hysteresis
FREQ
FREQ
PGOOD
FB
FB
FREQ
FREQ
FREQ
FB
FB
= 0mA to 50mA, V
with Respect to Set Regulated Voltage
with Respect to Set Regulated Voltage
Ramping Negative
Ramping Positive
CC
= 0V, PLLIN/MODE = DC Voltage
= INTV
= 25k, PLLIN/MODE = DC Voltage
= 65k, PLLIN/MODE = DC Voltage
= 105k, PLLIN/MODE = DC Voltage
= 2mA
Ramping Positive
= 5V
The
J
CC
= 25°C. V
, PLLIN/MODE = DC Voltage
l
denotes the specifi cations which apply over the full operating
EXTVCC
Note 4: The LTC3890-1 is tested in a feedback loop that servos V
a specifi ed voltage and measures the resultant V
85°C is not tested in production. This specifi cation is assured by design,
characterization and correlation to production testing at 125°C.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications information.
Note 6: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 7: The minimum on-time condition is specifi ed for an inductor peak-
to-peak ripple current ≥ of I
the Applications Information section).
IN
= 12V, V
= 8.5V
RUN1,2
= 5V, EXTV
MAX
l
(See Minimum On-Time Considerations in
CC
MIN
375
320
485
–13
4.5
75
= 0V unless otherwise noted.
7
TYP
250
105
440
835
350
535
–10
0.6
4.7
0.2
2.5
2.5
10
25
FB1,2
. The specifi cation at
MAX
505
380
585
850
1.1
4.9
0.4
±1
–7
13
ITH1,2
UNITS
38901f
to
kHz
kHz
kHz
kHz
kHz
kHz
mV
μA
μs
%
%
%
%
%
V
V