Datasheet

11
LT3439
sn3439 3439fs
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
TYPICAL APPLICATIO
U
Low Noise 5V to ±12V Push-Pull DC Transformer
V
IN
SHDN
3
14
D3
C11
2.2nF
1kV
D4
R8
10k
D2
D1
OPTIONAL
OPTIONAL
47
6
5
11
V
IN
5V
1, 16
13
T1
C1
4.7µF
C7
0.01µF
C3
47µF
C4
47µF
L1
V
OUT
12V
80mA
V
OUT
–12V
80mA
C
T
820pF
10
LT3439
SYNC
C
T
R
T
16.9k
C1: TAIYO YUDEN JMK212BJ475KG
C3-C6: SANYO OS-CON 20SVQP47M
C9, C10: SANYO OS-CON 16SVQPA39M
C11: AVX 1206AC222MA11A
D1-D4: MMBD914
L1, L2: COILCRAFT DT1608C-333
T1: COILTRONICS CTX02-16030
R
SI
16.9k
3439 TA02
R
T
COLA
COLB
R
SL
GND PGND
•
•
•
•
IN OUT
LT1761-BYP
BYP
ADJ
GND
R1
442k
R2
49.9k
C9
39µF
C8
0.01µF
C5
47µF
IN OUT
LT1964-BYP
BYP
ADJ
GND
R3
442k
R4
49.9k
C10
39µF
C6
47µF
L2
+ + +
+
+ +
U
PACKAGE DESCRIPTIO
FE Package
16-Lead Plastic TSSOP (4.4mm)
(Reference LTC DWG # 05-08-1663)
Exposed Pad Variation BA
FE16 (BA) TSSOP 0203
0.09 – 0.20
(.0036 – .0079)
0
° – 8°
0.45 – 0.75
(.018 – .030)
4.30 – 4.50*
(.169 – .177)
6.40
BSC
134
5
6
7
8
10 9
4.90 – 5.10*
(.193 – .201)
16 1514 13 12 11
1.10
(.0433)
MAX
0.05 – 0.15
(.002 – .006)
0.65
(.0256)
BSC
2.74
(.108)
2.74
(.108)
0.195 – 0.30
(.0077 – .0118)
2
MILLIMETERS
(INCHES)
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.150mm (.006") PER SIDE
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
RECOMMENDED SOLDER PAD LAYOUT
3. DRAWING NOT TO SCALE
0.45 ±0.05
0.65 BSC
4.50 ±0.10
6.60 ±0.10
1.05 ±0.10
2.74
(.108)
2.74
(.108)
SEE NOTE 4
4. RECOMMENDED MINIMUM PCB METAL SIZE
FOR EXPOSED PAD ATTACHMENT