Datasheet
LTC4268-1
2
42681fc
pin conFiguraTionabsoluTe MaxiMuM raTings
V
PORTN
Voltage .......................................... 0.3V to –90V
V
NEG
Voltage ..................V
PORTN
+ 90V to V
PORTN
–0.3V
V
CC
to GND Voltage (Note 3)
Low Impedance Source ......................... –0.3V to 18V
Current Fed ..........................................30mA into V
CC
R
CLASS
, I
LIM_EN
Voltage .. V
PORTN
+ 7V to V
PORTN
– 0.3V
SHDN Voltage ...............V
PORTN
+ 90V to V
PORTN
– 0.3V
PWRGD Voltage (Note 3)
Low Impedance Source .... V
NEG
+ 11V to V
NEG
– 0.3V
Current Fed ..........................................................5mA
PWRGD Voltage ............ V
PORTN
+ 80V to V
PORTN
– 0.3V
PWRGD Current .....................................................10mA
R
CLASS
Current ....................................................100mA
SENSE
–
, SENSE
+
Voltage ........................ –0.5V to +0.5V
UVLO, SYNC Voltage ...................................–0.3V to V
CC
FB Current ..............................................................±2mA
V
CMP
Current ......................................................... ±1mA
Operating Ambient Temperature Range (Notes 4, 5)
LTC4268-1C ............................................. 0°C to 70°C
LTC4268-1I ..........................................–40°C to 85°C
Junction Temperature (Note 5) ............................. 150°C
Storage Temperature Range .................. –65°C to 150°C
(Notes 1, 2)
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
33
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
V
PORTP
NC
PWRGD
PWRGD
V
NEG
V
NEG
V
NEG
NC
PG
PGDLY
R
CMP
C
CMP
SENSE+
SENSE–
UVLO
V
CMP
SHDN
NC
R
CLASS
I
LIM_EN
V
PORTN
V
PORTN
V
PORTN
NC
SG
V
CC
t
ON
ENDLY
SYNC
SFST
OSC
FB
TOP VIEW
DKD32 PACKAGE
32-LEAD (7mm × 4mm) PLASTIC DFN
T
JMAX
= 150°C,θ
JA
= 49°C/W, θ
JC
= 4.7°C/W
EXPOSED PAD (PIN 33) MUST BE SOLDERED TO
HEAT SINKING PLANE THAT IS ELECTRICALLY CONNECTED TO GND
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4268CDKD-1#PBF
LTC4268IDKD-1#PBF
LTC4268CDKD-1#TRPBF
LTC4268IDKD-1#TRPBF
42681
42681
32-Lead (7mm × 4mm) Plastic DFN
32-Lead (7mm × 4mm) Plastic DFN
0°C to 70°C
–40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4268CDKD-1
LTC4268IDKD-1
LTC4268CDKD-1#TR
LTC4268IDKD-1#TR
42681
42681
32-Lead (7mm × 4mm) Plastic DFN
32-Lead (7mm × 4mm) Plastic DFN
0°C to 70°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/
orDer inForMaTion