lt1931a Linear Technology Corporation, lt1931a Datasheet - Page 11

• Manufacturer Part Number: lt1931a
• Description: Lt1931a - 1.2mhz/2.2mhz Inverting Dc/dc Converters In Thinsot
• Manufacturer: Linear Technology Corporation

PACKAGE DESCRIPTIO
TYPICAL APPLICATIO S
0.20 BSC
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
3.85 MAX
DATUM ‘A’
V
SS
2.62 REF
RECOMMENDED SOLDER PAD LAYOUT
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.
SLIC Power Supply with – 21.6V and – 65V Outputs, Uses Soft-Start
R
15k
SS
V
5V
IN
0.62
MAX
0.30 – 0.50 REF
PER IPC CALCULATOR
U
*TOTAL OUTPUT POWER NOT TO EXCEED 1.3W
C1 TO C7: X5R OR X7R
D1, D2: BAV99 OR EQUIVALENT
L1: SUMIDA CR43-100
C
68nF
SS
U
C1
4.7µF
16V
0.95
REF
V
SHDN
IN
LT1931
(Reference LTC DWG # 05-08-1635)
10µH
GND
L1
1.22 REF
1.4 MIN
0.09 – 0.20
(NOTE 3)
5-Lead Plastic TSOT-23
NFB
SW
R2
1k
S5 Package
2.80 BSC
1000pF
C8
1.00 MAX
16.2k
R1
1Ω
R3
1.50 – 1.75
(NOTE 4)
2.7k
R4
0.80 – 0.90
PIN ONE
35V
1µF
C4
0.95 BSC
C2
1µF
35V
C3
1µF
35V
3
3
3
D1
D2
D3
2
1
2
1
2
1
2.90 BSC
(NOTE 4)
1.90 BSC
C5
4.7µF
25V
C6
4.7µF
25V
C7
4.7µF
25V
1931 TA09
LT1931/LT1931A
S5 TSOT-23 0302 REV B
COM
V
–21.6V
48mA*
V
– 65V
20mA*
OUT1
OUT2
0.30 – 0.45 TYP
5 PLCS (NOTE 3)
0.01 – 0.10
11
1931fa