LTC3458L
16
3458lfa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2005
RELATED PARTS
TYPICAL APPLICATIO
U
PART NUMBER DESCRIPTION COMMENTS
LT1310 1.5A I
SW
, 4.5MHz, High Efficiency Step-Up DC/DC Converter V
IN
: 2.75V to 18V, V
OUT(MAX)
= 35V, I
Q
= 12mA, I
SD
< 1μA,
MS10E
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
LT1615/ 300mA/80mA I
SW
, Constant Off-Time, High Efficiency V
IN
: 1.2V to 15V, V
OUT(MAX)
= 34V, I
Q
= 20μA, I
SD
< 1μA,
LT1615-1 Step-Up DC/DC Converter ThinSOT
LT1618 1.5A I
SW
, 1.4MHz, 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
LT1946/LT1946A 1.5A I
SW
, 1.2MHz/2.7MHz, High Efficiency Step-Up V
IN
: 2.45V to 16V, V
OUT(MAX)
= 34V, I
Q
= 3.2mA, I
SD
< 1μA, MS8
DC/DC Converter
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
LTC3400/ 600mA I
SW
, 1.2MHz, Synchronous Step-Up DC/DC Converter V
IN
: 0.5V to 5V, V
OUT(MAX)
= 5V, I
Q
= 19μA/300μA I
SD
< 1μA,
LTC3400B ThinSOT
LTC3401 1A I
SW
, 3MHz, Synchronous Step-Up DC/DC Converter V
IN
: 0.5V to 5V, V
OUT(MAX)
= 6V, I
Q
= 38μA I
SD
< 1μA, MS10
LTC3402 2A I
SW
, 3MHz, Synchronous Step-Up DC/DC Converter V
IN
: 0.5V to 5V, V
OUT(MAX)
= 6V, I
Q
= 38μA I
SD
< 1μA, MS10
LTC3421 3A I
SW
, 3MHz, Synchronous Step-Up DC/DC Converter V
IN
: 0.5V to 4.5V, V
OUT(MAX)
= 2.4V to 5.25V
LTC3425 5A I
SW
, 8MHz, 4-Phase Synchronous Step-Up DC/DC Converter V
IN
: 0.5V to 4.5V, V
OUT(MAX)
= 5.25V, I
Q
= 12μA, I
SD
< 1μA,
QFN32
LTC3429 600mA, 500kHz, Synchronous Step-Up DC/DC Converter V
IN
: 0.5V to 5V, V
OUT(MAX)
= 5V, I
Q
= 20μA/300μA I
SD
< 1μA,
with Output Disconnect and Soft-Start ThinSOT
LTC3458 1.4A I
SW
, 1.5MHz, High Efficiency Step-Up DC/DC Converter V
IN
: 1.5V to 6V, V
OUT(MAX)
= Up to 7.5V
LTC3459 70mA I
SW
, 10V Micropower Synchronous Boost/Output Disconnect V
IN
: 1.5V to 5.5V, V
OUT(MAX)
= 10V, I
Q
= 10μA, ThinSOT
LT3460 320mA I
SW
, 1.3MHz, High Efficiency Step-Up DC/DC Converter V
IN
: 2.5V to 16V, V
OUT(MAX)
= 36V, I
Q
= 2mA, I
SD
< 1μA, SC70,
ThinSOT
LT3464 85mA I
SW
, Constant Off-Time, High Efficiency Step-Up DC/DC V
IN
: 2.3V to 10V, V
OUT(MAX)
= 34V, I
Q
= 25μA, I
SD
< 1μA,
Converter with Integrated Schottky/Output Disconnect ThinSOT
High Current LED Driver with BURST Pin Current Regulation
Two Alkaline Cells Powering
a 1-Watt Lumiled
V
IN
GND/PGND
SHDN
SYNC
R
T
I
LIM
SW
V
OUT
FB
COMP
SS
BURST
LTC3458L
2 ALKALINE
1.8V TO 3.3V
C
IN
2.2μF
L1
Z1
D1
ON OFF
274k 84.5k R
BURST
33k
0.01μF
0.01μF
0.01μF
C
OUT
2.2μF
V
OUT
3V TO 3.5V
3458L TA06a
C
IN
, C
OUT
: TAIYO YUDEN JMK107BJ225MA
D1: LUXEON EMITTER LUMILED WHITE
LXHLMW1D
L1: Coilcraft 10μH MSS7341
R
BURST
: 45.3k FOR 300mA,
82.5k FOR 150mA,
232k FOR 50mA
Z1: CENTRAL SEMI 6.8V ZENER DIODE SOT-23 CMPZ5235B
f
OSC
= 750kHz
+
–
INPUT VOLTAGE (V)
EFFICIENCY (%)
100
90
80
70
60
50
3458L TA06b
1.8
2.3
2.8
3.3
300mA, 3.5V
50mA, 3V
150mA, 3.2V
NOTE: LUMILED CURRENT REGULATION
~20% OVER V
IN
RANGE
LT 0807 REV A • PRINTED IN USA
