ltc1624 Linear Technology Corporation, ltc1624 Datasheet - Page 2

• Manufacturer Part Number: ltc1624
• Description: High Efficiency So-8 N-channel Switching Regulator Controller
• Manufacturer: Linear Technology Corporation

ABSOLUTE
LTC1624
Input Supply Voltage (V
Topside Driver Supply Voltage (BOOST)....42V to – 0.3V
Switch Voltage (SW).................................. 36V to – 0.6V
Differential Boost Voltage
SENSE
I
Peak Driver Output Current < 10 s (TG) .................... 2A
Operating Temperature Range
Junction Temperature (Note 1)............................. 125 C
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
ELECTRICAL CHARACTERISTICS
SYMBOL
Main Control Loop
I
V
V
I
V
I
TG t
TG t
f
V
The
temperature range.
Note 1: T
dissipation P
2
IN
Q
ITH/RUN
OSC
TH
FB
OVL
ITH/RUN
BOOST
V
V
V
V
LINE REG
LOAD REG
SENSE(MAX)
BOOST
V
(BOOST to SW) ....................................7.8V to – 0.3V
V
V
LTC1624CS: 0 C
LTC1624IS: – 40 C
/RUN, V
LTC1624CS ............................................ 0 C to 70 C
LTC1624IS ......................................... – 40 C to 85 C
r
f
FB
IN
IN
denotes specifications which apply over the full operating
< 15V .................................. (V
J
–
is calculated from the ambient temperature T
15V .......................... (V
Voltage
D
FB
according to the following formula:
PARAMETER
Feedback Current
Feedback Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
Output Overvoltage Lockout
Input DC Supply Current
Run Threshold
Run Current Source
Run Pullup Current
Maximum Current Sense Threshold
TG Transition Time
Oscillator Frequency
Boost Voltage
Boost Load Regulation
Voltages ............................ 2.7V to – 0.3V
Rise Time
Fall Time
Normal Mode
Shutdown
T
W
MAXIMUM
A
T
A
70 C
85 C
IN
)......................... 36V to – 0.3V
W W
IN
+0.3V) to (V
RATINGS
IN
+ 0.3V) to – 0.3V
A
U
and power
CONDITIONS
(Note 2)
(Note 2)
V
(Note 2)
I
I
(Note 3)
V
V
V
V
C
C
SW = 0V, I
SW = 0V, I
TH
TH
IN
ITH/RUN
ITH/RUN
ITH/RUN
FB
LOAD
LOAD
IN
Sinking 5 A
Sourcing 5 A
= 3.6V to 20V (Note 2)
= 1.0V
– 15V)
T
= 3000pF
= 3000pF
A
= 25 C, V
= 0V
= 0.3V
= 1V
BOOST
BOOST
= 5mA, V
= 2mA to 20mA
PACKAGE/ORDER
Consult factory for Military grade parts.
Note 2: The LTC1624 is tested in a feedback loop which servos V
the midpoint for the error amplifier (V
Note 3: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
IN
= 15V, unless otherwise noted.
T
I
SENSE
TH
J
= T
/RUN
IN
GND
V
T
FB
= 8V
A
JMAX
–
+ (P
1
2
3
4
8-LEAD PLASTIC SO
= 125 C,
D
S8 PACKAGE
• 110 C/W)
TOP VIEW
JA
= 110 C/ W
8
7
6
5
1.1781
V
BOOST
TG
SW
– 0.8
MIN
1.24
– 50
145
175
IN
0.6
4.8
ITH
INFORMATION
U
= 1.8V).
0.002
–160
– 0.5
– 2.5
1.19
1.28
5.15
TYP
550
200
160
0.8
10
16
50
50
S8 PART MARKING
0.5
3
ORDER PART
LTC1624CS8
LTC1624IS8
NUMBER
W
1.2019
– 350
MAX
– 0.8
– 5.0
0.01
1.32
1624
1624I
900
185
150
150
225
5.5
50
30
0.8
5
FB
UNITS
U
to
%/V
kHz
mV
nA
ns
ns
%
%
%
V
V
A
A
V
A
A
V