LT1944 Просмотр технического описания (PDF) - Linear Technology
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LT1944 Datasheet PDF : 8 Pages
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LT1944
TYPICAL APPLICATIO S
2-Cell Dual Output (3.3V, 5V) Boost Converter
VIN
1.8V
TO 3V
C1
4.7µF
L1
4.7µH
D1
8
VIN
2
SHDN1
10
SW1
1
FB1
4.7pF
LT1944
4
SHDN2
5
FB2
GND PGND PGND SW2
37 96
5V
40mA
1M
C2
10µF
324k
604k
C1: TAIYO YUDEN JMK212BJ475
C2, C3: TAIYO YUDEN JMK316BJ106
D1, D2: ON SEMI MBR0520
L1, L2: MURATA LQH3C4R7
(408) 573-4150
(408) 573-4150
(800) 282-9855
(814) 237-1431
L2
4.7µH
4.7pF
D2
C3
1M
10µF
3.3V
80mA
1944 TA02
2-Cell to 5V Efficiency
90
85
VIN = 3V
80
75
VIN = 1.8V
70
65
60
55
50
0.1
1
10
LOAD CURRENT (mA)
100
1944 TA02a
2-Cell to 3.3V Efficiency
90
85
VIN = 3V
80
75
70
VIN = 1.8V
65
60
55
50
0.1
1
10
LOAD CURRENT (mA)
100
1944 TA02b
PACKAGE DESCRIPTIO
MS10 Package
10-Lead Plastic MSOP
(LTC DWG # 05-08-1661)
0.007
(0.18)
0° – 6° TYP
0.043
(1.10)
MAX
0.021 ± 0.006
(0.53 ± 0.015)
SEATING
PLANE 0.007 – 0.011
(0.17 – 0.27)
0.0197
(0.50)
BSC
0.034
(0.86)
REF
0.005 ± 0.002
(0.13 ± 0.05)
* 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
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
0.118 ± 0.004*
(3.00 ± 0.102)
0.193 ± 0.006
(4.90 ± 0.15)
10 9 8 7 6
0.118 ± 0.004**
(3.00 ± 0.102)
MSOP (MS10) 1100
12345
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.
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