LTC3603 Datasheet, PDF (3/22 Pages) Linear Technology – 2.5A, 15V Monolithic Synchronous Step-Down Regulator

LTC3603
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_A = 25°C. V_IN = 12V unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
PV_IN
V_FB
ΔV_FB(LINEREG)
ΔV_FB(LOADREG)
ΔV_PGOOD
R_PGOOD
I_FB
g_m
I_S
Operating Voltage Range
Regulated Feedback Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Power Good Range
Power Good Resistance
FB Input Bias Current
Transconductance Amplifier g_m
Supply Current
Active Mode
Sleep Mode
Shutdown
ITH = 0.7V (Note 3)
V_IN = 5V to 15V, I_TH = 0.7V
ITH = 0.36V to 0.84V
(Note 4)
4.5
l 0.594
l
0.6
0.005
0.02
±10
55
10
1.7
15
0.606
0.1
±12
80
500
700
75
100
0.2
1
INTV_CC
t_{ON, MIN}
V_RUN
I_TRACK/SS
f_OSC
f_SYNC
R_DS(ON)
V_CC LDO Output Voltage
Minimum Controllable ON-Time
RUN Pin ON Threshold
TRACK/SS Pull-Up Current
Oscillator Frequency
SYNC Capture Range
Top Switch On-Resistance
Bottom Switch On-Resistance
V_RUN Rising
TRACK/SS = 1V
R_T = 105k
4.7
4.9
5.1
95
115
l 0.4
0.7
1
1.25
0.85
1
1.15
0.3
3
85
45
I_LIM
I_LSW
V_UVLO
V_{UVLO, HYS}
Peak Current Limit
Switch Leakage Current
INTV_CC Undervoltage Lockout
INTV_CC Undervoltage Lockout Hysteresis
INTV_CC Ramping Up
3.8
4.5
5.2
0.1
1
l 4.1
4.2
4.3
700
UNITS
V
V
%/V
%
%
Ω
nA
mS
μA
μA
μA
V
ns
V
μA
MHz
MHz
mΩ
mΩ
A
μA
V
mV
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 LTC3603E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3603I is guaranteed
over the –40°C to 125°C operating junction temperature range.
Note 3: The LTC3603 is tested in a feedback loop that adjusts V_FB to
achieve a specified error amplifier output voltage (I_TH).
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: T_J is calculated from the ambient temperature T_A and the power
dissipation as follows: T_J = T_A + (P_D)(θ_JAºC/W).
Note 6: 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 7: This limit indicates the current density limitations of the internal
metallization and it is not tested in production.
3603fa
3