Datasheet

LTC3634
3
3634fb
For more information www.linear.com/LTC3634
elecTrical characTerisTics
The l denotes the specifications which apply over the specified junction
temperature range, otherwise specifications are at T
A
= 25°C (Note 4). V
IN
= 12V, INTV
CC
= 3.3V, unless otherwise noted.
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3634EUFD#PBF LTC3634EUFD#TRPBF 3634 28-Lead (5mm × 4mm) Plastic QFN –40°C to 125°C
LTC3634IUFD#PBF LTC3634IUFD#TRPBF 3634 28-Lead (5mm × 4mm) Plastic QFN –40°C to 125°C
LTC3634HUFD#PBF LTC3634HUFD#TRPBF 3634 28-Lead (5mm × 4mm) Plastic QFN –40°C to 150°C
LTC3634MPUFD#PBF LTC3634MPUFD#TRPBF 3634 28-Lead (5mm × 4mm) Plastic QFN –55°C to 150°C
LTC3634EFE#PBF LTC3634EFE#TRPBF LTC3634FE 28-Lead Plastic TSSOP –40°C to 125°C
LTC3634IFE#PBF LTC3634IFE#TRPBF LTC3634FE 28-Lead Plastic TSSOP –40°C to 125°C
LTC3634HFE#PBF LTC3634HFE#TRPBF LTC3634FE 28-Lead Plastic TSSOP –40°C to 150°C
LTC3634MPFE#PBF LTC3634MPFE#TRPBF LTC3634FE 28-Lead Plastic TSSOP –55°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear
.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
V
IN1
, Operating Supply Range
V
IN2
, Operating Supply Range V
IN1
> 3.6V
l
l
3.6
1.4
15
15
V
V
Output Voltage Range V
ON
= V
OUT
(Note 6) 0.6 3 V
I
Q
Input DC Supply Current (V
IN1
+ V
IN2
)
Active (Note 7)
Shutdown
RUN1 = RUN2 = V
IN
RUN1 = RUN2 = 0V
1.3
15
mA
µA
V
FBREG1
Feedback Reference Voltage 3.6V < V
IN
< 15V, 0.5V < ITH < 1.8V
0°C < T
A
< 85°C
–55°C < T
A
< 150°C
l
l
0.594
0.592
0.6
0.6
0.606
0.606
V
V
V
FBREG2
Feedback Reference Voltage 3.6V < V
IN
< 15V, 0.5V < ITH < 1.8V
l
VTTR – 6 VTTR VTTR + 6 mV
VTTR VTTR Voltage Reference 1.5V < VDDQIN < 2.6V
I
LOAD
= ±10mA, C
LOAD
< 10nF
l
0.492 •
VDDQIN
0.50 •
VDDQIN
0.508 •
VDDQIN
V
I
FB
Feedback Pin Input Current ±30 nA
g
m(EA)
Error Amplifier Transconductance ITH = 1.2V 1.0 mS
t
ON(MIN)
Minimum On-Time V
ON
= 0.5V, V
IN
= 4V 20 ns
t
OFF(MIN)
Minimum Off-Time V
IN
= 6V 40 60 ns
f
OSC
Oscillator Frequency V
RT
= INTV
CC
R
T
= 162k
R
T
= 80.6k
1.4
1.7
3.4
2
2
4
2.6
2.3
4.6
MHz
MHz
MHz
I
LIM1
Channel 1 Valley Switch Current Limit
Positive Limit
Negative Limit
3.3 4.4
8
5.5 A
A
I
LIM2
Channel 2 Valley Switch Current Limit
Positive Limit
Negative Limit
3.3 4.4
8
5.5 A
A
R
DS(ON)
Channel 1
Top Switch On-Resistance
Bottom Switch On-Resistance
Channel 2
Top Switch On-Resistance
Bottom Switch On-Resistance
130
65
130
65
mΩ
mΩ
mΩ
mΩ