LT1945EMS Linear Technology, LT1945EMS Datasheet - Page 8

• 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: -

LT1945
TYPICAL APPLICATIONS
RELATED PARTS
PART NUMBER
LT1613
LT1615/LT1615-1
LT1940
LT1944
LT1944-1
LT1949/LT1949-1
LTC3400/LTC3400B 600mA I
LTC3401
LTC3402
LTC3423
LTC3424
8
TO 5V
C1: TAIYO YUDEN JMK212BJ475
C2, C3: TAIYO YUDEN GMK316BJ105
C4: TAIYO YUDEN UMK212BJ104
D1, D2, D3: ZETEX ZHCS400
L1, L2: MURATA LQH3C100
4.7μF
2.7V
V
C1
IN
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
2
4
GND
SHDN1
SHDN2
V
IN
8
3
10μH
PGND
DESCRIPTION
550mA I
300mA I
Step-Up DC/DC Converter
Dual Output 1.4A (I
Step-Down DC/DC Converter
Dual Output 350mA I
Step-Up DC/DC Converter
Dual Output 150mA I
Step-Up DC/DC Converter
550mA I
Step-Up DC/DC Converter
1A I
2A I
1A I
DC/DC Converter
2A I
DC/DC Converter
Dual Output (±32V) Converter
L2
LT1945
7
10μH
SW
SW
SW
SW
L1
PGND
●
, 3MHz, Synchronous Step-Up DC/DC Converter
, 3MHz, Synchronous Step-Up DC/DC Converter
, 3MHz, Low V
, 3MHz, Low V
FAX: [phone]
SW
SW
SW
SW
9
NFB1
[phone]
[phone]
[phone]
[phone]
[phone]
, 1.4MHz, High Effi ciency Step-Up DC/DC Converter V
, Constant Off-Time, High Effi ciency
, 600kHz/1.1MHz, High Effi ciency
, 1.2MHz, Synchronous Step-Up DC/DC Converter
SW1
SW2
FB2
10
6
0.1μF
C4
1
5
OUT
D3
4.7pF
SW
SW
OUT
OUT
D2
), Constant 1.1MHz, High Effi ciency
D1
, Constant Off-Time, High Effi ciency
, Constant Off-Time, High Effi ciency
, Synchronous Step-Up
, Synchronous Step-Up
●
www.linear.com
100pF
80.6k
2M
604k
24.9k
C2
1μF
C3
1μF
1945 TA02
–32V
5mA
32V
5mA
COMMENTS
ThinSOT Package
V
ThinSOT Package
V
TSSOP-16E Package
V
V
V
S8, MS8 Packages
V
ThinSOT Package
V
V
V
V
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
= 0.9V to 10V, V
= 1.2V to 15V, V
= 3V to 25V, V
= 1.2V to 15V, V
= 1.2V to 15V, V
= 1.5V to 12V, V
= 0.85V to 5V, V
= 0.5V to 5V, V
= 0.5V to 5V, V
= 0.5V to 5V, V
= 0.5V to 5V, V
80
75
70
60
50
65
55
0.1
Effi ciency at VIN = 3.6V
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
LOAD CURRENT (mA)
= 1.2V, I
= 6V, I
= 6V, I
= 6V, I
= 6V, I
= 34V, I
= 34V, I
= 34V, I
= 34V, I
= 28V, I
= 5V, I
© LINEAR TECHNOLOGY CORPORATION 2001
Q
Q
Q
Q
1
Q
Q
Q
= 38μA, I
= 38μA, I
= 38μA, I
= 38μA, I
Q
Q
Q
Q
= 2.5mA, I
= 19μA/300μA, I
= 20μA, I
= 20μA, I
–32V OUTPUT
= 20μA, I
= 4.5mA, I
= 3mA, I
+32V OUTPUT
LT 1208 REV A • PRINTED IN USA
SD
SD
SD
SD
SD
SD
SD
SD
SD
= <1μA, MS Package
= <1μA, MS Package
= <1μA, MS Package
= <1μA, MS Package
1945 TA02a
SD
= <1μA, MS Package
= <1μA,
= <1μA, MS Package
= <1μA,
= <1μA,
= <25μA,
10
SD
= <1μA,
1945fa