LT1944-1EMS Linear Technology, LT1944-1EMS Datasheet - Page 2

• Manufacturer Part Number: LT1944-1EMS
• Description: IC DC/DC CONV STP-UP DUAL 10MSOP
• Manufacturer: Linear Technology
• Type: Step-Up (Boost)r

Specifications of LT1944-1EMS

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 2
• Voltage - Output: 1.23 ~ 36 V
• Current - Output: 100mA, 175mA
• 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: -
• Other names: LT19441EMS

ABSOLUTE AXI U RATI GS
(Note 1)
V
SW1, SW2 Voltage .................................................. 36V
FB1, FB2 Voltage .......................................................V
Current into FB1, FB2 Pins ..................................... 1mA
Junction Temperature ........................................... 125 C
Operating Temperature Range (Note 2) .. – 40 C to 85 C
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
LT1944-1
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
PARAMETER
Minimum Input Voltage
Quiescent Current, Each Switcher
FB Comparator Trip Point
FB Comparator Hysteresis
FB Voltage Line Regulation
FB Pin Bias Current (Note 3)
Switch Off Time, Switcher 1 (Note 4)
Switch Off Time, Switcher 2 (Note 4)
Switch V
Switch Current Limit, Switcher 1
Switch Current Limit, Switcher 2
SHDN Pin Current
SHDN Input Voltage High
SHDN Input Voltage Low
Switch Leakage Current
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1944-1E is guaranteed to meet performance specifications
from 0 C to 70 C. Specifications over the – 40 C to 85 C operating
2
IN
, SHDN1, SHDN2 Voltage ................................... 15V
CESAT
W
W W
CONDITIONS
Not Switching
V
1.2V < V
V
V
V
V
V
I
V
V
Switch Off, V
SW
SHDN
FB
FB
FB
FB
FB
SHDN
SHDN
= 1.23V
> 1V
< 0.6V
> 1V
< 0.6V
= 70mA
= 0V
= 1.2V
= 5V
IN
< 12V
SW
U
= 5V
A
= 25 C. V
The
IN
IN
denotes the specifications which apply over the full operating
= 1.2V, V
Consult LTC Marketing for parts specified with wider operating temperature ranges.
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Bias current flows into the FB pin.
Note 4: See Figure 1 for Switcher 1 and Switcher 2 locations.
PACKAGE/ORDER I FOR ATIO
SHDN1
SHDN2
SHDN
GND
FB1
FB2
T
JMAX
10-LEAD PLASTIC MSOP
= 1.2V unless otherwise noted.
1
2
3
4
5
= 125 C,
MS10 PACKAGE
TOP VIEW
JA
= 160 C/W
10
9
8
7
6
SW1
PGND
V
PGND
SW2
IN
1.205
MIN
130
0.9
65
U
1.23
0.05
0.01
TYP
400
100
175
1.5
1.5
1.5
20
30
85
8
2
8
ORDER PART
LT1944-1EMS
MS10 PART
MARKING
NUMBER
W
LTTU
1.255
MAX
0.25
120
125
225
1.2
0.1
30
80
12
1
3
5
UNITS
U
%/V
mV
mV
mA
mA
nA
ns
V
A
A
V
A
A
V
V
A
s
s
s