lt1944-1 Linear Technology Corporation, lt1944-1 Datasheet - Page 7

• Manufacturer Part Number: lt1944-1
• Description: Dual Micropower Step-up Dc/dc Converter
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIO S
PACKAGE DESCRIPTIO
(0.18)
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
0.007
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,
PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
(0.53 0.015)
0.021 0.006
0 – 6 TYP
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.
TO 4.2V
4.7 F
2.7V
V
C1
U
IN
SEATING
PLANE
U
C1, C3: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN TMK316BJ105
D1, D2: CENTRAL SEMI CMDSH-3
L1, L2: MURATA LQH3C220
2
4
Dual Output (5V, 24V) Boost Converter
0.007 – 0.011
(0.17 – 0.27)
GND
SHDN1
SHDN2
V
(Reference LTC DWG # 05-08-1661)
IN
8
3
22 H
PGND
L2
(1.10)
LT1944-1
0.043
10-Lead Plastic MSOP
MAX
22 H
7
L1
PGND
MS10 Package
0.0197
(0.50)
BSC
9
SW1
SW2
FB1
FB2
10
6
1
5
D1
D2
4.7pF
4.7pF
[phone]
[phone]
[phone]
[phone]
(0.86)
0.034
REF
0.005 0.002
(0.13 0.05)
1M
53.6k
324k
1M
1944-1 TA02
(3.00 0.102)
0.193 0.006
0.118 0.004*
(4.90 0.15)
C3
4.7 F
C2
1 F
24V
1mA
5V
40mA
10
1 2 3 4 5
9
8
7 6
LT1944-1
(3.00 0.102)
0.118 0.004**
MSOP (MS10) 1100
7