Datasheet

LTC3600
3
3600fc
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
V
IN
Supply Range 4 15 V
ISET I
SET
Reference Current
l
49.5
49.3
50
50
50.5
51
µA
µA
I
SET
Line Regulation
l
0.02 0.05 %/V
I
SET
DROP_OUT Voltage I
SET
> 45µA, V
IN
– V
SET
340 mV
I
SET
Load Regulation I
OUT
= 0 to 1.5A 0.25 µA
Error Amp Input Offset (Note 4) –3 3 mV
Error Amp Load Regulation
l
0.05 0.1 %
Minimum V
OUT
Voltage V
ISET
= 0, R
OUT
= 0 10 mV
g
m
(EA) Error Amplifier Transconductance 0.63 0.9 mS
t
ON(MIN)
Minimum On-Time 30 ns
t
OFF(MIN)
Minimum Off-Time 130 ns
I
LIM
Current Limit
l
1.6 2 2.4 A
Negative Current Limit –0.9 A
R
TOP
Top Power NMOS On-Resistance 200 mΩ
R
BOTTOM
Bottom Power NMOS On-Resistance 100 mΩ
V
UVLO
INTV
CC
Undervoltage Lockout Threshold INTV
CC
Rising 3.45 3.7 V
UVLO Hysteresis INTV
CC
Falling 150 mV
V
RUN
Run Threshold
Run Hysteresis
RUN Rising
RUN Falling
l
1.55
0.13
1.8 V
V
RUN Pin Leakage RUN = 12V 0 2 µA
V
INTVCC
Internal V
CC
Voltage 5.5V < V
IN
< 15V 4.8 5 5.4 V
INTV
CC
Load Regulation I
LOAD
= 0mA to 20mA 0.3 %
OV Output Overvoltage PGOOD Upper
Threshold
PGFB Rising 0.620 0.645 0.680 V
UV Output Undervoltage PGOOD Lower
Threshold
PGFB Falling 0.520 0.555 0.590 V
PGOOD Hysteresis PGFB Returning 10 mV
PGOOD Pull-Down Resistance 1mA Load 200 Ω
PGOOD Leakage Current PGOOD = 5V 1 µA
V
MODE/SYNC
MODE/SYNC Threshold MODE V
IL(MAX)
MODE V
IH(MIN)
SYNC V
IH(MIN)
SYNC V
IL(MAX)
4.3
2.5
0.4
0.4
V
V
V
V
MODE/SYNC Pin Current MODE = 5V 9.5 µA
f
OSC
Switching Frequency R
T
= 36.1k
l
0.92 1 1.06 MHz
V
OUT
Pin Resistance to Ground 600 kΩ
V
INOV
V
IN
Overvoltage Lockout V
IN
Rising
V
IN
Falling
17.5
16
V
V
I
Q
Input DC Supply Current
Discontinuous
Shutdown
(Note 3)
Mode = 0, R
T
= 36.1k
Run = 0
700
0
1100
1.5
µA
µA
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 12V, unless otherwise noted.