LTC3890EGN-1#PBF Linear Technology, LTC3890EGN-1#PBF Datasheet - Page 4

• Manufacturer Part Number: LTC3890EGN-1#PBF
• Description: IC BUCK SYNC ADJ 25A DUAL 28SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3890EGN-1#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 24 V
• Current - Output: 25A
• Frequency - Switching: 50kHz ~ 900kHz
• Voltage - Input: 4 ~ 60 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Primary Input Voltage: 12V
• No. Of Outputs: 2
• Output Voltage: 24V
• Output Current: 25A
• No. Of Pins: 32
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 1 - Unlimited
• Supply Voltage Min: 4V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

ELECTRICAL CHARACTERISTICS
LTC3890
SYMBOL
BG/TG t
t
INTV
V
V
V
V
V
V
Oscillator and Phase-Locked Loop
f
f
f
f
f
f
PGOOD1 and PGOOD2 Outputs
V
I
V
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 LTC3890 is tested under pulsed load conditions such that
T
from 0°C to 85°C. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3890I is guaranteed
over the –40°C to 125°C operating junction temperature range, the
LTC3890H is guaranteed over the –40°C to 150°C operating junction
temperature range and the LTC3890MP is tested and guaranteed over the
–55°C to 150°C operating junction temperature range.
High junction temperatures degrade operating lifetimes; operating lifetime
is derated for junction temperatures greater than 125°C. Note that the
maximum ambient temperature consistent with these specifications is
determined by specific operating conditions in conjunction with board
layout, the rated package thermal impedance and other environmental
factors.
temperature range, otherwise specifications are at T
4
ON(MIN)
25kΩ
65kΩ
105kΩ
LOW
HIGH
SYNC
PGOOD
PG
J
INTVCCVIN
LDOVIN
INTVCCEXT
LDOEXT
EXTVCC
LDOHYS
PGL
PG
≈ T
CC
A
. The LTC3890E is guaranteed to meet performance specifications
Linear Regulator
1D
PARAMETER
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
Minimum On-Time
Internal V
INTV
Internal V
INTV
EXTV
EXTV
Programmable Frequency
Programmable Frequency
Programmable Frequency
Low Fixed Frequency
High Fixed Frequency
Synchronizable Frequency
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level
Delay for Reporting a Fault
CC
CC
CC
CC
Load Regulation
Load Regulation
Switchover Voltage
Hysteresis
CC
CC
Voltage
Voltage
CONDITIONS
C
(Note 7)
6V < V
I
6V < V
I
EXTV
R
R
R
V
V
PLLIN/MODE = External Clock
I
V
V
V
CC
CC
PGOOD
LOAD
FREQ
FREQ
PGOOD
FB
FB
FREQ
FREQ
FREQ
V
Hysteresis
V
Hysteresis
A
FB
FB
= 0mA to 50mA, V
= 0mA to 50mA, V
with Respect to Set Regulated Voltage
with Respect to Set Regulated Voltage
= 25°C. V
CC
Ramping Negative
Ramping Positive
= 0V, PLLIN/MODE = DC Voltage
= INTV
IN
EXTVCC
= 25k, PLLIN/MODE = DC Voltage
= 65k, PLLIN/MODE = DC Voltage
= 105k, PLLIN/MODE = DC Voltage
= 3300pF Each Driver
= 2mA
Ramping Positive
= 5V
< 60V, V
The
CC
< 13V
l
, PLLIN/MODE = DC Voltage
IN
EXTVCC
denotes the specifications which apply over the full operating junction
= 12V, V
EXTVCC
EXTVCC
Note 3: T
dissipation P
Note 4: The LTC3890 is tested in a feedback loop that servos V
a specified voltage and measures the resultant V
85°C is not tested in production and is assured by design, characterization
and correlation to production testing at other temperatures (125°C for
the LTC3890E/LTC3890I, 150°C for the LTC3890H/LTC3890MP). For the
LTC3890MP , the specification at –40°C is not tested in production and is
assured by design, characterization and correlation to production testing
at –55°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 specified for an inductor
peak-to-peak ripple current ≥ 40% of I
Considerations in the Applications Information section).
= 0V
RUN1,2
= 0V
= 8.5V
J
T
is calculated from the ambient temperature T
J
= 5V, EXTV
D
= T
according to the following formula:
A
+ (P
D
• 34°C/W)
CC
= 0V unless otherwise noted. (Note 2)
l
4.85
4.85
MIN
375
320
485
–13
4.5
75
7
MAX
(See Minimum On-Time
TYP
250
105
440
835
350
535
–10
5.1
0.7
5.1
0.6
4.7
0.2
2.5
2.5
30
95
10
25
FB
. The specification at
A
and power
MAX
5.35
5.35
505
380
585
850
1.1
1.1
4.9
0.4
±1
–7
13
ITH1,2
UNITS
to
3890fa
kHz
kHz
kHz
kHz
kHz
kHz
mV
μA
ns
ns
μs
%
%
%
%
%
%
V
V
V
V