LT3580
28
3580fg
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2007
LT 0910 REV G • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LT1310 2A (I
SW
), 40V, 1.2MHz High Efficiency Step-Up DC/DC Converter V
IN
: 2.3V to 16V, V
OUT(MAX)
= 40V, I
Q
= 3mA, I
SD
< 1μA, ThinSOT™
Package
LT1613 550mA (I
SW
), 1.4MHz High Efficiency Step-Up DC/DC Converter V
IN
: 0.9V to 10V, V
OUT(MAX)
= 34V, I
Q
= 3mA, I
SD
< 1μA,
ThinSOT Package
LT1618 1.5A (I
SW
), 1.25MHz High Efficiency Step-Up DC/DC Converter V
IN
: 1.6V to 18V, V
OUT(MAX)
= 35V, I
Q
= 1.8mA, I
SD
< 1μA,
MS10 Package
LT1930/LT1930A 1A (I
SW
), 1.2MHz/2.2MHz High Efficiency Step-Up DC/DC
Converter
V
IN
: 2.6V to 16V, V
OUT(MAX)
= 34V, I
Q
= 4.2mA/5.5mA, I
SD
< 1μA,
ThinSOT Package
LT1931/LT1931A 1A (I
SW
), 1.2MHz/2.2MHz High Efficiency Inverting DC/DC
Converter
V
IN
: 2.6V to 16V, V
OUT(MAX)
= 34V, I
Q
= 4.2mA/5.5mA, I
SD
< 1μA,
ThinSOT Package
LT1935 2A (I
SW
), 40V, 1.2MHz High Efficiency Step-Up DC/DC Converter V
IN
: 2.3V to 16V, V
OUT(MAX)
= 40V, I
Q
= 3mA, I
SD
< 1μA,
ThinSOT Package
LT1944/LT1944-1
(Dual)
Dual Output 350mA (I
SW
), Constant Off-Time, High Efficiency
Step-Up DC/DC Converter
V
IN
: 1.2V to 15V, V
OUT(MAX)
= 34V, I
Q
= 20μA, I
SD
< 1μA,
MS10 Package
LT1945 (Dual) Dual Output Pos/Neg 350mA (I
SW
), Constant Off-Time,
High Efficiency Step-Up DC/DC Converter
V
IN
: 1.2V to 15V, V
OUT(MAX)
= ±34V, I
Q
= 20μA, I
SD
< 1μA,
MS10 Package
LT1946/LT1946A 1.5A (I
SW
), 1.2MHz/2.7MHz High Efficiency Step-Up DC/DC
Converter
V
IN
: 2.6V to 16V, V
OUT(MAX)
= 34V, I
Q
= 3.2mA, I
SD
< 1μA,
MS8E Package
LT1961 1.5A (I
SW
), 1.25MHz High Efficiency Step-Up DC/DC Converter V
IN
: 3V to 25V, V
OUT(MAX)
= 35V, I
Q
= 0.9mA, I
SD
< 6μA,
MS8E Package
LT3436 3A (I
SW
), 800kHz, 34V Step-Up DC/DC Converter V
IN
: 3V to 25V, V
OUT(MAX)
= 34V, I
Q
= 0.9mA, I
SD
< 6μA,
TSSOP16E Package
LT3467 1.1A (I
SW
), 1.3MHz High Efficiency Step-Up DC/DC Converter V
IN
: 2.6V to 16V, V
OUT(MAX)
= 40V, I
Q
= 1.2mA, I
SD
< 1μA,
ThinSOT, 2mm × 3mm DFN Packages
LT3477 42V, 3A, 3.5MHz Boost, Buck-Boost, Buck LED Driver V
IN
: 2.5V to 25V, V
OUT(MAX)
= 40V, Analog/PWM, I
SD
< 1μA,
QFN, TSSOP20E Packages
LT3479 3A Full-Featured DC/DC Converter with Soft-Start and Inrush
Current Protection
V
IN
: 2.5V to 24V, V
OUT(MAX)
= 40V, Analog/PWM, I
SD
< 1μA,
DFN, TSSOP Packages
2MHz Inverting Converter Generates –12V from a 5V to 12V Input Efficiency and Power Loss
vs Load Current
C2
10μF
V
OUT
–12V
500mA (V
IN
= 12V)
350mA (V
IN
= 5V)
L1
10μH
C3
1μF
D1
147k
V
IN
5V TO 12V
V
IN
SW
3580 TA09a
LT3580
45.3k
10k
SHDN
GND
FB
VC
SYNC SS
RT
2.2nF
47pF
0.1μF
C1
2.2μF
C1: 2.2μF, 25V, X5R, 1206
C2: 10μF, 25V, X5R, 1206
C3: 1μF, 50V, X5R, 0805
D1: CENTRAL SEMI CMMSH1-40
L1: SUMIDA CDRH6D28NP-100NC
L2: SUMIDA CDRH3D28NP-220NC
L2
22μH
LOAD CURRENT (mA)
0
EFFICIENCY (%)
POWER LOSS (mw)
70
80
400
3580 TA09b
60
50
100
200
300
50
150
250
350
90
65
75
55
85
600
1000
200
0
1400
400
800
1200
V
IN
= 5V
