Datasheet
2
LTC2846
sn2846 2846fs
ORDER PART
NUMBER
(Note 1)
V
CC
Voltage.............................................. –0.3V to 6.5V
V
IN
Voltage .............................................. –0.3V to 6.5V
Input Voltage
Transmitters ........................... –0.3V to (V
CC
+ 0.3V)
Receivers............................................... –18V to 18V
Logic Pins .............................. –0.3V to (V
CC
+ 0.3V)
Output Voltage
Transmitters ................. (V
EE
– 0.3V) to (V
DD
+ 0.3V)
Receivers................................. –0.3V to (V
IN
+ 0.3V)
V
EE
........................................................ –10V to 0.3V
V
DD
....................................................... –0.3V to 10V
Short-Circuit Duration
Transmitter Output ..................................... Indefinite
Receiver Output.......................................... Indefinite
V
EE
.................................................................. 30 sec
SW Voltage ............................................... –0.4V to 36V
FB Voltage ............................................... –0.3V to 2.5V
Current into FB Pin .............................................. ±1mA
SHDN Voltage ........................................... –0.3V to 10V
Operating Temperature Range
LTC2846C ............................................... 0°C to 70°C
LTC2846I........................................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
LTC2846CG
LTC2846IG
T
JMAX
= 125°C, θ
JA
= 90°C/W, θ
JC
= 35°C/W
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
TOP VIEW
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
NC
PGND
V
IN
SHDN
C1
–
C1
+
V
DD
V
CC
D1
D2
D3
R1
R2
R3
M0
M1
V
IN
M2
SW
FB
SGND
C2
+
C2
–
V
EE
GND
D1 A
D1 B
D2 A
D2 B
D3/R1 A
D3/R1 B
R2 A
R2 B
R3 A
R3 B
DCE/DTE
R3
CHARGE PUMP
R1
D2
D1
R2
D3
G PACKAGE
36-LEAD PLASTIC SSOP
T
T
T
T
T
BOOST
SWITCHING
REGULATOR
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
IN
= 3.3V, V
SHDN
= V
IN
, unless otherwise noted. (Notes 2, 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
I
CC
V
CC
Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, No Load 14 mA
All Digital Pins = GND or V
IN
) RS530, RS530-A, X.21 Modes, Full Load ● 100 130 mA
V.35 Mode
● 126 170 mA
V.28 Mode, No Load 20 mA
V.28 Mode, Full Load ● 35 75 mA
No-Cable Mode
● 300 900 µA
P
D
Internal Power Dissipation (DCE Mode) RS530, RS530-A, X.21 Modes, Full Load 550 mW
V.35 Mode, Full Load 775 mW
V.28 Mode, Full Load 200 mW
V
+
Positive Charge Pump Output Voltage V.11 or V.28 Mode, No Load ● 8 9.3 V
V.35 Mode
● 7 8.0 V
V.28 Mode, with Load
● 8 8.7 V
V.28 Mode, with Load, I
DD
= 10mA 6.5 V
ELECTRICAL CHARACTERISTICS
Consult LTC Marketing for parts specified with wider operating temperature ranges.
*θ
JA
SOLDERED TO A CIRCUIT BOARD IS TYPICALLY 60°C/W