Datasheet
LTC3604
3
3604f
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
VIN
Input Supply Range
l
3.6 15 V
I
Q
Input DC Supply Current
Forced Continuous Operation
Sleep Current
Shutdown
MODE = 0V
MODE = INTV
CC
, V
FB
> 0.6V
RUN = 0V
700
300
14
1000
500
25
µA
µA
µA
V
FB
Feedback Reference Voltage
l
0.594 0.600 0.606 V
ΔV
LINEREG
Reference Voltage Line Regulation V
VIN
= 3.6V to 15V 0.01 %/V
ΔV
LOADREG
Output Voltage Load Regulation ITH = 0.6V to 1.6V 0.1 %
I
FB
Feedback Pin Input Current V
FB
= 0.6V ±30 nA
g
m(EA)
Error Amplifi er Transconductance ITH = 1.2V 2.0 mS
t
ON(MIN)
Minimum On-Time V
ON
= 1V, V
IN
= 4V 20 ns
t
OFF(MIN)
Minimum Off-Time V
IN
= 6V 40 60 ns
I
LIM
Valley Switch Current Limit 2.6 3.4 4.3 A
f
OSC
Oscillator Frequency V
RT
= INTV
CC
R
RT
= 160k
R
RT
= 80k
1.4
1.7
3.4
2
2
4
2.6
2.3
4.6
MHz
MHz
MHz
R
DS(ON)
Top Switch On-Resistance 130 m
Bottom Switch On-Resistance 100 m
V
VIN(OV)
V
IN
Overvoltage Lockout Threshold V
IN
Rising
V
IN
Falling
l
l
16.8
15.8
17.5
16.5
18
17
V
V
V
INTVCC
INTV
CC
Voltage 3.6V < V
IN
< 15V 3.13 3.3 3.45 V
ΔINTV
CC
INTV
CC
Load Regulation (Note 4) I
INTVCC
= 0mA to 20mA 0.6 %
V
UVLO
INTV
CC
Undervoltage Lockout
Threshold
INTV
CC
Rising, V
IN
= INTV
CC
INTV
CC
Falling, V
IN
= INTV
CC
2.75
2.45
2.9 V
V
V
RUN
RUN Threshold RUN Rising
RUN Falling
l
l
1.21
0.97
1.25
1.0
1.29
1.03
V
V
I
RUN(LKG)
RUN Leakage Current V
VIN
= 15V 0 ±3 µA
V
FB_GB
PGOOD Good-to-Bad Threshold FB Rising
FB Falling
8
–8
10
–10
%
%
V
FB_BG
PGOOD Bad-to-Good Threshold FB Rising
FB Falling
–3
3
–5
5
%
%
t
PGOOD
Power Good Filter Time 20 40 µs
R
PGOOD
PGOOD Pull-Down Resistance 10mA Load 15
I
SW(LKG)
Switch Leakage Current V
RUN
= 0V 0.01 1 µA
t
SS
Internal Soft-Start Time V
FB
from 10% to 90% Full Scale 400 700 µs
V
FB_TRACK
TRACK Pin TRACK = 0.3V 0.28 0.3 0.315 mV
I
TRACK
TRACK Pull-Up Current 1.4 µA
V
MODE/SYNC
MODE Threshold Voltage MODE V
IH
MODE V
IL
l
l
1.0
0.4
V
V
SYNC Threshold Voltage SYNC V
IH
l
0.95 V
I
MODE
MODE Input Current MODE = 0V
MODE = INTV
CC
–1.5
1.5
µA
µA
The l denotes the specifi cations which apply over the full operating
junction temperature range, otherwise specifi cations are at T
J
= 25°C. V
VIN
= 12V, unless otherwise specifi ed.
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 specifi cations
from 0°C to 85°C. Specifi cations 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 specifi c operating
conditions in conjunction with board layout, the rated package thermal
resistance and other environmental factors.