ltc3853euj Linear Technology Corporation, ltc3853euj Datasheet - Page 4

• Manufacturer Part Number: ltc3853euj
• Description: Triple Output, Multiphase Synchronous Step-down Controller
• Manufacturer: Linear Technology Corporation

LTC3853
ELECTRICAL CHARACTERISTICS
SYMBOL
INTV
V
V
V
V
V
Oscillator and Phase-Locked Loop
f
f
f
Ph
Ph
R
I
PGOOD Outputs
V
I
V
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 LTC3853E is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3853I is guaranteed over the full
–40°C to 125°C operating temperature range.
Note 3: T
dissipation P
4
temperature range, otherwise specifi cations are at T
NOM
LOW
HIGH
FREQ
PGOOD
INTVCC
LDO
EXTVCC
LDO
LDOHYS
PGL
PG
MODE/PLLIN
TRIPLE
DUAL(2+1)
LTC3853EUJ: T
CC
INT
EXT
Linear Regulator
J
is calculated from the ambient temperature T
D
according to the following formulas:
J
PARAMETER
Internal V
INTV
EXTV
EXTV
EXTV
Nominal Frequency
Lowest Frequency
Highest Frequency
Channel 2-Channel 1 Phase
Channel 3-Channel 2 Phase
Channel 1-Channel 3 Phase
Channel 2-Channel 1 Phase
Channel 3-Channel 2 Phase
Channel 1-Channel 3 Phase
MODE/PLLIN Input Resistance
Phase Detector Output Current
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level
= T
Sinking Capability
Sourcing Capability
A
CC
+ (P
CC
CC
CC
Load Regulation
Switchover Voltage
Voltage Drop
Hysteresis
D
CC
• 33°C/W)
Voltage
A
and power
A
CONDITIONS
7V < V
I
EXTV
I
V
V
V
V
f
f
I
V
V
CC
CC
MODE
MODE
PGOOD
FREQ
FREQ
FREQ
FB2
PGOOD
FB
= 25°C, V
V
V
= 0mA to 50mA
= 20mA, V
with Respect to Set Regulated Voltage
FB
FB
Tied to V
CC
= 1.2V
= 0V
≥ 2.4V
< f
> f
IN
Ramping Negative
Ramping Positive
= 2mA
The
Ramping Positive
= 5V
< 24V
OSC
OSC
l
IN
IN
EXTVCC
denotes the specifi cations which apply over the full operating
= 15V, V
Through 200kΩ
Note 4: The LTC3853 is tested in a feedback loop that servos V
specifi ed voltage and measures the resultant V
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 ≥40% of I
Considerations in the Applications Information section).
= 5V
RUN1,2,3
= 5V, unless otherwise noted.
l
MAX
MIN
450
210
670
4.8
4.5
–5
5
(see Minimum On-Time
FB1,2,3
– 7.5
TYP
200
500
250
750
120
120
120
180
120
250
–13
0.5
4.7
0.1
7.5
30
60
13
5
.
MAX
550
290
830
–10
5.2
0.3
75
±2
2
10
ITH1,2,3
UNITS
to a
3853f
Deg
Deg
Deg
Deg
Deg
Deg
kHz
kHz
kHz
mV
mV
kΩ
μA
μA
μA
%
%
%
V
V
V