LTC3604 Datasheet, PDF (3/24 Pages) Linear Technology – 2.5A, 15V Monolithic Synchronous Step-Down Regulator

LTC3604
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_J = 25°C. V_VIN = 12V, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
V_VIN
Input Supply Range
I_Q
Input DC Supply Current
Forced Continuous Operation
MODE = 0V
Sleep Current
Shutdown
MODE = INTV_CC, V_FB > 0.6V
RUN = 0V
l
3.6
15
700
1000
300
500
14
25
V_FB
ΔV_LINEREG
ΔV_LOADREG
I_FB
g_m(EA)
t_ON(MIN)
t_OFF(MIN)
I_LIM
f_OSC
Feedback Reference Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
Feedback Pin Input Current
Error Amplifier Transconductance
Minimum On-Time
Minimum Off-Time
Valley Switch Current Limit
Oscillator Frequency
R_DS(ON)
Top Switch On-Resistance
Bottom Switch On-Resistance
V_VIN = 3.6V to 15V
ITH = 0.6V to 1.6V
V_FB = 0.6V
ITH = 1.2V
V_ON = 1V, V_IN = 4V
V_IN = 6V
V_RT = INTV_CC
R_RT = 160k
R_RT = 80k
l 0.594
2.6
1.4
1.7
3.4
0.600
0.01
0.1
2.0
20
40
3.4
2
2
4
130
100
0.606
±30
60
4.3
2.6
2.3
4.6
V_VIN(OV)
V_INTVCC
ΔINTV_CC
V_UVLO
V_RUN
V_IN Overvoltage Lockout Threshold
INTV_CC Voltage
INTV_CC Load Regulation (Note 4)
INTV_CC Undervoltage Lockout
Threshold
RUN Threshold
V_IN Rising
V_IN Falling
3.6V < V_IN < 15V
I_INTVCC = 0mA to 20mA
INTV_CC Rising, V_IN = INTV_CC
INTV_CC Falling, V_IN = INTV_CC
RUN Rising
RUN Falling
l 16.8
17.5
18
l 15.8
16.5
17
3.13
3.3
3.45
0.6
2.75
2.9
2.45
l 1.21
1.25
1.29
l 0.97
1.0
1.03
I_RUN(LKG)
V_{FB_GB}
RUN Leakage Current
PGOOD Good-to-Bad Threshold
V_VIN = 15V
FB Rising
FB Falling
0
±3
8
10
–8
–10
V_{FB_BG}
PGOOD Bad-to-Good Threshold
FB Rising
FB Falling
–3
–5
3
5
t_PGOOD
Power Good Filter Time
R_PGOOD PGOOD Pull-Down Resistance
I_SW(LKG) Switch Leakage Current
t_SS
Internal Soft-Start Time
V_{FB_TRACK} TRACK Pin
I_TRACK
TRACK Pull-Up Current
V_MODE/SYNC MODE Threshold Voltage
I_MODE
SYNC Threshold Voltage
MODE Input Current
10mA Load
V_RUN = 0V
V_FB from 10% to 90% Full Scale
TRACK = 0.3V
MODE V_IH
MODE V_IL
SYNC V_IH
MODE = 0V
MODE = INTV_CC
20
0.28
l
1.0
l
l 0.95
40
15
0.01
1
400
700
0.3
0.315
1.4
0.4
–1.5
1.5
UNITS
V
μA
μA
μA
V
%/V
%
nA
mS
ns
ns
A
MHz
MHz
MHz
mΩ
mΩ
V
V
V
%
V
V
V
V
μA
%
%
%
%
μs
Ω
μA
μs
mV
μA
V
V
V
μA
μA
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 LTC3604E is guaranteed to meet performance specifications
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 LTC3604I is guaranteed
over the full –40°C to 125°C operating junction temperature range. The
maximum ambient temperature is determined by specific operating
conditions in conjunction with board layout, the rated package thermal
resistance and other environmental factors.
3604f
3