LT1944EMS Linear Technology, LT1944EMS Datasheet - Page 7

• Manufacturer Part Number: LT1944EMS
• Description: IC DC/DC CONV STP-UP DUAL 10MSOP
• Manufacturer: Linear Technology
• Type: Step-Up (Boost)r

Specifications of LT1944EMS

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 2
• Voltage - Output: 1.23 ~ 36 V
• Current - Output: 350mA
• Voltage - Input: 1.2 ~ 15 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Frequency - Switching: -

TYPICAL APPLICATIO S
PACKAGE DESCRIPTIO
0.007
(0.18)
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
* 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
90
85
80
75
70
65
60
55
50
0.1
C1: TAIYO YUDEN JMK212BJ475
C2, C3: TAIYO YUDEN JMK316BJ106
D1, D2: ON SEMI MBR0520
L1, L2: MURATA LQH3C4R7
2-Cell to 5V Efficiency
0.021 0.006
(0.53 0.015)
LOAD CURRENT (mA)
1
V
V
IN
IN
= 3V
= 1.8V
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.
0 – 6 TYP
10
U
U
[phone]
[phone]
[phone]
[phone]
1944 TA02a
2-Cell Dual Output (3.3V, 5V) Boost Converter
SEATING
TO 3V
PLANE
4.7 F
1.8V
100
V
C1
IN
0.007 – 0.011
(0.17 – 0.27)
2
4
(LTC DWG # 05-08-1661)
10-Lead Plastic MSOP
GND
SHDN1
SHDN2
(1.10)
0.043
V
MAX
IN
8
3
MS10 Package
4.7 H
PGND
0.0197
L2
(0.50)
BSC
LT1944
4.7 H
7
L1
PGND
9
SW1
SW2
FB1
FB2
10
6
1
5
(0.86)
0.034
D1
D2
4.7pF
4.7pF
REF
0.005 0.002
(0.13 0.05)
90
85
80
75
70
65
60
55
50
0.1
1M
324k
0.193 0.006
(3.00 0.102)
2-Cell to 3.3V Efficiency
0.118 0.004*
(4.90 0.15)
604k
1M
LOAD CURRENT (mA)
1
C2
10 F
C3
10 F
1944 TA02
5V
40mA
3.3V
80mA
V
V
IN
IN
10
1 2 3 4 5
= 3V
= 1.8V
9
10
8
7 6
1944 TA02b
MSOP (MS10) 1100
(3.00 0.102)
0.118 0.004**
100
LT1944
7