LT1945EMS Linear Technology, LT1945EMS Datasheet - Page 2

• Manufacturer Part Number: LT1945EMS
• Description: IC DC/DC CONV MICRPWR DUAL10MSOP
• Manufacturer: Linear Technology
• Type: Step-Up (Boost), Inverting, Flyback, Sepicr

Specifications of LT1945EMS

• 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: -

ABSOLUTE MAXIMUM RATINGS
LT1945
(Note 1)
V
SW1, SW2 Voltage ....................................................36V
NFB1 Voltage ............................................................–3V
FB2 Voltage ............................................................... VIN
Current into NFB1 Pin ............................................–1mA
Current into FB2 Pin ................................................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
ORDER INFORMATION
LEAD FREE FINISH
LT1945EMS#PBF
LT1945IMS#PBF
LEAD BASED FINISH
LT1945EMS
LT1945IMS
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Quiescent Current, (per Converter)
NFB1 Comparator Trip Point
FB2 Comparator Trip Point
FB Comparator Hysteresis
NFB1, FB2 Voltage Line Regulation
NFB1 Pin Bias Current (Note 3)
FB2 Pin Bias Current (Note 4)
Switch Off Time, Switcher 1 (Note 5)
Switch Off Time, Switcher 2 (Note 5)
Switch V
Switch Current Limit
2
temperature range, otherwise specifi cations are at T
IN
, SHDN1, SHDN2 Voltage .....................................15V
CESAT
TAPE AND REEL
LT1945EMS#TRPBF
LT1945IMS#TRPBF
TAPE AND REEL
LT1945EMS#TR
LT1945IMS#TR
CONDITIONS
Not Switching
V
–40°C < T
–40°C < T
–40°C < T
–40°C < T
1.2V < V
V
–40°C < T
–40°C < T
V
V
I
SW
SHDN
NFB1
FB2
FB2
= 300mA
> 1V
< 0.6V
= –1.23V
= 0V
IN
J
J
J
J
J
J
< 12V
http://www.linear.com/leadfree/
< 85°C
< 125°C
< 85°C
< 125°C
< 85°C
< 125°C
PART MARKING*
LTTS
LTTS
PART MARKING*
LTTS
LTTS
http://www.linear.com/tapeandreel/
A
= 25°C. V
The
l
IN
denotes the specifi cations which apply over the full operating
= 1.2V, V
PIN CONFIGURATION
PACKAGE DESCRIPTION
10-Lead Plastic MSOP
10-Lead Plastic MSOP
PACKAGE DESCRIPTION
10-Lead Plastic MSOP
10-Lead Plastic MSOP
SHDN
= 1.2V unless otherwise noted.
SHDN1
SHDN2
NFB1
GND
FB2
T
JMAX
10-LEAD PLASTIC MSOP
1
2
3
4
5
l
= 125°C, θ
MS PACKAGE
TOP VIEW
–1.205
–1.195
1.205
1.195
MIN
250
1.3
JA
= 160°C/W
10
9
8
7
6
–1.23
1.23
0.05
TYP
400
400
250
350
1.5
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
20
30
8
2
SW1
PGND
V
PGND
SW2
IN
–1.255
1.255
1.255
1.255
MAX
300
350
400
1.2
0.1
2.9
30
80
1
UNITS
1945fa
%/V
mV
mV
mA
μA
μA
μA
nA
nA
ns
ns
μs
V
V
V
V
V