LTC3813 Datasheet, PDF (4/32 Pages) Linear Technology – 100V Current Mode Synchronous Step-Up Controller

LTC3813
ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C, INTV_CC = DRV_CC = V_BOOST = V_OFF = V_RNG = SHDN = UV_IN = V_EXTVCC =
V_NDRV = 10V, V_SYNC = V_SENSE⁺ = V_SENSE^– = V_BGRTN = V_SW = 0V, unless otherwise specified.
SYMBOL
I_PGOOD
PG Delay
V_CC Regulators
V_EXTVCC
V_INTVCC,1
ΔV_EXTVCC,1
ΔV_LOADREG,1
V_INTVCC,2
ΔV_LOADREG,2
I_NDRV
V_CCSR
I_CCSR
PARAMETER
PGOOD Leakage Current
PGOOD Delay
EXTV_CC Switchover Voltage
EXTV_CC Rising
EXTV_CC Hysteresis
INTV_CC Voltage from EXTV_CC
V_EXTVCC - V_INTVCC at Dropout
INTV_CC Load Regulation from EXTV_CC
INTV_CC Voltage from NDRV Regulator
INTV_CC Load Regulation from NDRV
Current into NDRV Pin
Maximum Supply Voltage
Maximum Current into NDRV/INTV_CC
CONDITIONS
V_PGOOD = 5V
V_FB Falling
MIN TYP MAX UNITS
0
2
μA
125
μs
l 6.4
6.7
V
0.1
0.25
0.5
V
10.5V < V_EXTVCC < 15V
I_CC = 20mA, V_EXTVCC = 9.1V
I_CC = 0mA to 20mA, V_EXTVCC = 12V
Linear Regulator in Operation
9.4
10
10.6
V
170 250
mV
0.01
%
9.4
10
10.6
V
I_CC = 0mA to 20mA, V_EXTVCC = 0
V_NDRV – V_INTVCC = 3V
Trickle Charger Shunt Regulator
0.01
%
20
40
60
μA
15
V
Trickle Charger Shunt Regulator,
10
mA
INTV_CC ≤ 16.7V (Note 8)
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 LTC3813E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3813I is guaranteed to meet
performance specifications over the full –40°C to 125°C operating
temperature range.
Note 3: T_J is calculated from the ambient temperature T_A and power
dissipation P_D according to the following formula:
LTC3813: T_J = T_A + (P_D • 100°C/W)
Note 4: The LTC3813 is tested in a feedback loop that servos V_FB to the
reference voltage with the I_TH pin forced to a voltage between 1V and 2V.
Note 5: The dynamic input supply current is higher due to the power
MOSFET gate charging being delivered at the switching frequency
(Q_G • f_SW).
Note 6: Guaranteed by design. Not subject to test.
Note 7: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 8: I_CC is the sum of current into NDRV and INTV_CC.
3813fb
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