LT1935
U
TYPICAL APPLICATIO S
Efficiency, VOUT = 5V
90
85
80
75
70
65
60
55
50
5V Boost Converter
L1
1.8µH
D1
V
V
= 3.3V
OUT
5V
1A, V = 3.3V
IN
= 2.5V
V
IN
2.3V TO 4.8V
V
IN
IN
0.6A, V = 2.5V
IN
C3
150pF
V
SW
C1
R1
IN
4.7µF
29.4k
LT1935
SHDN
C2
20µF
ON OFF
FB
R2
10k
GND
C1, C2: X5R OR X7R 6.3V
D1: ON SEMI MBRM120
L1: SUMIDA CR43-1R8
1935 TA01
0
200
400
600
800 1000 1200
LOAD CURRENT (mA)
3.3V to 12V Boost Converter
L1
4.2µH
D1
V
OUT
V
IN
3.3V
12V
320mA
V
SW
C1
IN
R1
84.5k
4.7µF
47pF
LT1935
SHDN
C2
22µF
ON OFF
FB
R2
10k
GND
D1: ON SEMI MBRM120
L1: SUMIDA CDRH5D28-4R2
1935 TA02
U
PACKAGE DESCRIPTIO
S5 Package
5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
0.62
MAX
0.95
REF
2.90 BSC
(NOTE 4)
1.22 REF
1.50 – 1.75
(NOTE 4)
2.80 BSC
1.4 MIN
3.85 MAX 2.62 REF
PIN ONE
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45 TYP
5 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
DATUM ‘A’
0.01 – 0.10
1.00 MAX
0.30 – 0.50 REF
1.90 BSC
0.09 – 0.20
(NOTE 3)
NOTE:
S5 TSOT-23 0302
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
1935f
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 ofits circuits as described herein willnotinfringe on existing patentrights.
7
Linear Systems [ Linear Systems ]
