Datasheet
LTC3626
3
3626f
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 3). PV
IN
= SV
IN
=
12V unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
PV
IN
Input Supply Range
l
3.0 20 V
SV
IN
Input Supply Range
l
3.6 20 V
V
VOUT
Output Voltage Range (Note 5) V
ON
= V
OUT
0.6 6 V
I
Q
Input DC Supply Current
Forced Continuous Operation
PV
IN
SV
IN
MODE = 0, R
RT
= 158k, I
IN
, I
OUT
, TMON,
TSET = INTV
CC
30
900
39
1200
µA
µA
Sleep Current
PV
IN
SV
IN
V
FB
> 0.6V, I
IN
, I
OUT
, TMON, TSET,
MODE = INTV
CC
30
270
39
350
µA
µA
Shutdown
PV
IN
SV
IN
I
LOAD
= 0A, V
RUN
= 0V
0.01
13
2
17
µA
µA
V
FB
Feedback Reference Voltage
l
0.594 0.600 0.606 V
∆V
LINE(REG)
V
FB
Line Regulation V
VIN
= 3.6V to 20V 0.01 %/V
∆V
LOAD(REG)
V
FB
Load Regulation ITH = 0.6V to 1.5V 0.1 %
Feedback Pin Input Current V
FB
= 0.6V ±30 nA
Error Amplifier Transconductance ITH = 1.2V 1.5 mS
t
ON(MIN)
Minimum On-Time V
VON
=1V, V
VIN
= 3.6V 20 ns
t
OFF(MIN)
Minimum Off-Time PV
IN
= SV
IN
= 6V 40 60 ns
Valley Switch Current Limit 2.4 2.9 3.6 A
f
OSC
Oscillator Frequency V
RT
= INTV
CC
R
RT
= 158k
R
RT
= 105k
1.4
1.7
2.5
2
2
3
2.6
2.3
3.5
MHz
MHz
MHz
R
DS(ON)
Top Switch On-Resistance
Bottom Switch On-Resistance
115
70
mΩ
mΩ
IMON
OUT
Current (Note 6) I
SW
= 2.5A
I
SW
= 1.5A
I
SW
= 0.5A
148.5
89.1
29.7
156.25
93.75
31.25
164.0
98.4
33.5
µA
µA
µA
I
OUT
Limit Regulation Voltage
l
1.15 1.22 1.28 V
IMON
IN
Current (Note 6) I
SW
= 2.5A, 20% Duty Cycle
I
SW
= 1.5A, 20% Duty Cycle
I
SW
= 0.5A, 20% Duty Cycle
29.7
17.8
5.9
31.25
18.75
6.25
32.8
19.7
6.7
µA
µA
µA
I
IN
Limit Regulation Voltage
l
1.15 1.22 1.28 V
Internal Temperature Monitor T
A
= 25°C 1.5 V
Internal Temperature Monitor Slope (Note 7) 200 °C
/V
Temperature Limit Hysteresis 50 mV
PV
IN
Overvoltage Lockout Threshold PV
IN
Rising
PV
IN
Falling
20
21.5
20.5
V
V
V
INTVCC
INTV
CC
Voltage 3.6V < V
IN
< 20V 3.1 3.3 3.5 V
INTV
CC
Load Regulation (Note 8) I
INTVCC
= 0mA to 20mA 0.6 %
V
RUN
RUN Threshold RUN Rising
RUN Falling
l
l
1.19
0.97
1.23
1.0
1.27
1.03
V
V
RUN Leakage Current V
VIN
= 20V 0 ±1 μA
PGOOD Good-to-Bad Threshold FB Rising
FB Falling
8
–8
10
–10
%
%