LT1940EFE#TR Linear Technology, LT1940EFE#TR Datasheet - Page 20

• Manufacturer Part Number: LT1940EFE#TR
• Description: IC REG SW DUAL 1.4A STDN 16TSSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LT1940EFE#TR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 2
• Voltage - Output: 1.25 ~ 22 V
• Current - Output: 1.4A
• Frequency - Switching: 1.1MHz
• Voltage - Input: 3.6 ~ 25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

LT1940/LT1940L
TYPICAL APPLICATIO
RELATED PARTS
20
PART NUMBER
LT1765
LT1766
LT1767
LT1944
LT1944-1
LT1945
LT1956
LTC3407
LTC3411
LTC3412
LT3430
LTC3701
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
DESCRIPTION
25V, 2.75A (I
High Efficiency Step-Down DC/DC Converter
60V, 1.2A (I
High Efficiency Step-Down DC/DC Converter
25V, 1.2A (I
High Efficiency Step-Down DC/DC Converter
Dual Output 350mA I
High Efficiency Step-Up DC/DC Converter
Dual Output 150mA I
High Efficiency Step-Up DC/DC Converter
Dual Output, Pos/Neg, 350mA I
High Efficiency Step-Up DC/DC Converter
60V, 1.2A (I
High Efficiency Step-Down DC/DC Converter
Dual 600mA, 1.5MHz, Synchronous Step-Down Regulator V
1.25A (I
Synchronous Step-Down DC/DC Converter
2.5A (I
Synchronous Step-Down DC/DC Converter
60V, 2.75A (I
High Efficiency Step-Down DC/DC Converter
Two Phase,Dual, 500kHz, Constant Frequency,
Current Mode, High Efficiency Step-Down
DC/DC Controller
FAX: [phone] www.linear.com
OUT
OUT
), 4MHz,
4.8V TO 7V
), 4MHz,
OUT
OUT
OUT
OUT
OUT
Low Ripple, Low Profile 5V to 3.3V/2.4A Maximum Height = 1.4mm
PGOOD
), 200kHz,
), 1.25MHz,
), 500kHz,
), 1.25MHz,
), 200kHz,
V
2.2 F
IN
U
C3
SW
SW
D1, D2: MICROSEMI UPS120
D3, D4: BAT-54S
L1, L2: COILCRAFT LPO1704-332M
, Constant Off-Time,
, Constant Off-Time,
1500pF
330pF
16.5k
100k
1nF
SW
, Constant Off-Time,
4.7k
10k
RUN/SS1
RUN/SS2
PG1
PG2
V
V
FB1
FB2
C1
C2
LT1940L
GND
V
IN
C1: 2X TAIYO YUDEN JMK212BJ106ML
C3: 2X TAIYO YUDEN EMK212BJ105MN
BOOST1
BOOST2
SW1
SW2
COMMENTS
V
S8, TSSOP16E Package
V
TSSOP16/TSSOP16E Package
V
MS8, MS8E Package
V
MS Package
V
MS Package
V
MS Package Package
V
TSSOP16/TSSOP16E Package
V
MS Package
V
TSSOP16E Package
V
TSSOP16E Package
V
SSOP-16 Package
0.47 F
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
: 3V to 25V, V
: 5.5V to 60V, V
: 3V to 25V, V
: 1.2V to 15V, V
: 1.2V to 15V, V
: 1.2V to 15V, V
: 5.5V to 60V, V
: 2.5V to 5.5V, V
: 2.5V to 5.5V, V
: 2.5V to 5.5V, V
: 5.5V to 60V, V
: 2.5V to 10V, V
0.1 F
0.1 F
D4B
D3B
D1
D2
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
3.3 H
3.3 H
D4A
D3A
L1
L2
: 1.20V, I
: 1.2V, I
20 F
: 1.2V, I
: 1.2V, I
: 1.20V, I
: 0.8V, I
: 34V, I
: 34V, I
: 34V, I
: 0.6V, I
: 0.8V, I
: 0.8V, I
C1
Q
LINEAR TECHNOLOGY CORPORATION 2001
Q
: 1mA, I
Q
Q
Q
Q
Q
: 1mA, I
Q
Q
Q
LT/TP 0204 1K REV A • PRINTED IN USA
: 20 A, I
: 20 A, I
Q
: 2.5mA, I
: 2.5mA, I
Q
: 460 A, I
: 40 A, MSE Package
: 60 A, I
: 60 A, I
: 20 A, I
: 2.5mA, I
1940 TA07
OUT2
3.3V
2.4A
SD
SD
SD
SD
: 6 A
SD
SD
SD
: 15 A
SD
SD
SD
: <1 A,
: <1 A,
SD
: <1 A
: <1 A
: <1 A,
: 25 A
: 25 A
: 9 A
: 25 A
1940fa