LT1940EFE#TRPBF Linear Technology, LT1940EFE#TRPBF Datasheet - Page 19

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

Specifications of LT1940EFE#TRPBF

• 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: Lead free / RoHS Compliant
• Power - Output: -

PACKAGE DESCRIPTIO
TYPICAL APPLICATIO S
1.2A
5V
19V REGULATED
D1, D2: ON SEMI MBRM140T3
D3: CENTRAL CMPD914
D4, D5: BAT-54S
6.60 0.10
30.1k
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
10 F
INPUT
(.0036 – .0079)
10k
0.09 – 0.20
4.7 H
4.50 0.10
D3
L2
RECOMMENDED SOLDER PAD LAYOUT
220pF
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.
+
U
22 F
(.169 – .177)
SEE NOTE 4
4.30 – 4.50*
0.1 F
10k
D1
(.018 – .030)
U
1.5nF
(.108)
0.45 – 0.75
MILLIMETERS
2.74
0.65 BSC
(INCHES)
4.7 F
1nF
0.45 0.05
D6, D7: 6.2V ZENER
L1: SUMIDA CDRH4D28-4R7
L2: SUMIDA CDRH5D28-150
16-Lead Plastic TSSOP (4.4mm)
(Reference LTC DWG # 05-08-1663)
BOOST2
SW2
FB2
V
PG2
RUN/SS2
(.108)
C2
2.74
Exposed Pad Variation BA
1.05 0.10
LT1940
GND
V
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
TFT LCD Supply
IN
4. RECOMMENDED MINIMUM PCB METAL SIZE
RUN/SS1
SHALL NOT EXCEED 0.150mm (.006") PER SIDE
BOOST1
FOR EXPOSED PAD ATTACHMENT
FE Package
0 – 8
SW1
PG1
FB1
V
C1
1nF
0.1 F
D4B
D4A
(.0256)
0.65
BSC
20k
1nF
0.022 F
16 1514 13 12 11
1
(.0077 – .0118)
22
0.195 – 0.30
220pF
2
D2
15 H
L1
(.193 – .201)
3 4 5 6 7 8
4.90 – 5.10*
D6
(.108)
10 F
10.7k
2.74
100k
10
9
(.002 – .006)
C10
1 F
0.05 – 0.15
FE16 (BA) TSSOP 0203
LT1940/LT1940L
D5B
1 F
D5A
22
(.108)
(.0433)
2.74
MAX
D7
1.10
22
6.40
BSC
1940 TA08
1 F
25V
3mA
13V
300mA
–5V
3mA
19
1940fa