LTC1439 Linear Technology, LTC1439 Datasheet - Page 2

• Manufacturer Part Number: LTC1439
• Description: Dual High Efficiency/ Low Noise/ Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

ABSOLUTE
PACKAGE/ORDER
Input Supply Voltage (V
Topside Driver Voltage (BOOST 1, 2) ...... 42V to – 0.3V
Switch Voltage (SW1, 2)...................... V
EXTV
POR2, LBO Voltages ............................... 12V to – 0.3V
AUXFB Voltage ....................................... 20V to – 0.3V
AUXDR Voltage ....................................... 28V to – 0.3V
SENSE
V
V
PLL LPF, I
LTC1438/LTC1439
2
Consult factory for Military grade parts.
OSENSE2
PROG1
CC
SENSE
SENSE
SENSE
V
SENSE
V
POR2**
OSENSE2
PROG1
+
, V
SGND
Voltage....................................... 10V to – 0.3V
C
SFB1
1, SENSE
I
LBO
I
OSC
TH1
TH2
LBI
Voltages ................... INTV
+
–
–
+
PROG2
TH1
1
1
*
2
2
**
T
*
JMAX
V
NC ON THE LTC1438XCG
28-LEAD PLASTIC SSOP
10
11
12
13
14
OSENSE1
1
2
3
4
5
6
7
8
9
, I
= 125 C,
TH2
Voltages ................... INTV
G PACKAGE
TOP VIEW
W
MAXIMUM
+
ON LTC1438-ADJ
Voltages .................. 2.7V to – 0.3V
2, SENSE
JA
= 95 C/ W
IN
)....................... 36V to – 0.3V
28
27
26
25
24
23
22
21
20
19
18
17
16
15
W W
RUN/SS1
BOOST 1
TGL1
SW1
V
BG1
INTV
PGND
BG2
EXTV
SW2
TGL2
BOOST 2
RUN/SS2
–
IN
INFORMATION
1, SENSE
U
CC
CC
RATINGS
CC
+ 0.3V to – 0.3V
LTC1438CG
LTC1438CG-ADJ
LTC1438IG
LTC1438IG-ADJ
LTC1438XCG
IN
W
–
PART NUMBER
2,
+ 5V to – 5V
U
CC
ORDER
to – 0.3V
U
AUXON, PLLIN, SFB1,
RUN/SS1, RUN/SS2, LBI Voltages ......... 10V to – 0.3V
Peak Output Current < 10 s (TGL1, 2, BG1, 2) ......... 2A
Peak Output Current < 10 s (TGS1, 2) .............. 250mA
INTV
Operating Ambient Temperature Range
Junction Temperature (Note 1) ............................ 125 C
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
36-LEAD PLASTIC SSOP
Commercial ........................................... 0 C to 70 C
Industrial .......................................... – 40 C to 85 C
SENSE
SENSE
SENSE
V
SENSE
RUN/SS1
RUN/SS2
OSENSE2
V
V
AUXDR
CC
G PACKAGE
PROG1
SGND
PROG2
POR2
C
SFB1
LBO
I
I
OSC
TH1
LBI
TH2
+
–
–
+
T
T
Output Current ....................................... 50mA
JMAX
JMAX
1
1
2
2
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
= 125 C,
= 125 C,
TOP VIEW
JA
JA
= 95 C/ W (G)
= 85 C/ W (GW)
36-LEAD PLASTIC SSOP
GW PACKAGE
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
PLL LPF
PLLIN
BOOST 1
TGL1
SW1
TGS1
V
BG1
INTV
PGND
BG2
EXTV
TGS2
SW2
TGL2
BOOST 2
AUXON
AUXFB
IN
CC
CC
PART NUMBER
LTC1439CG
LTC1439IG
LTC1439CGW
LTC1439IGW
ORDER