LTC3454EDD#TRPBF Linear Technology, LTC3454EDD#TRPBF Datasheet - Page 12

• Manufacturer Part Number: LTC3454EDD#TRPBF
• Description: IC LED DRIVER PHOTO FLASH 10-DFN
• Manufacturer: Linear Technology
• Type: Photo Flash LEDr

Specifications of LTC3454EDD#TRPBF

• Topology: PWM, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight, Flash/Torch
• Type - Secondary: White LED
• Frequency: 900MHz ~ 1.15MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 5.15V
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 1A
• Internal Switch(s): Yes
• Efficiency: 90%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LTC3454
TYPICAL APPLICATION
12
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ALKALINE
PART NUMBER
3-CELL
4.5V
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
0.1μF
DESCRIPTION
Constant Current, Constant Voltage 1.4MHz, High Effi ciency
Boost Regulator
DC/DC Converter
Constant Current, 1.2MHz, High Effi ciency White LED
Boost Regulator
Constant Current, 1.2MHz, High Effi ciency White LED
Boost Regulator
High Effi ciency, Multi-Display LED Controller
700mA Low Noise Charge Pump LED Driver
1A Low Noise High Current Charge Pump LED
Driver with Independent Flash/Torch Current
600mA/1.2A I
DC/DC Converter
600mA/1.2A I
DC/DC Converter
Single Cell 350mA LED Driver
Synchronous Buck-Boost High Power White LED Driver
Boost Regulator with Integrated Schottky Diode
Dual Constant Current, 2MHz, High Effi ciency White LED
Boost Regulator with Integrated Schottky Diode
3A, Full Featured DC/DC Converter with Soft-Start and
Inrush Current Protection
2.2μF
SW
LED: LUMILEDS, LXCL LW3C
L1: TOKO A997AS-4R7M
EN1
V
), 1.2MHz/2.2MHz, High Effi ciency Step-Up
●
C
FAX: [phone]
OUT
OUT
500mA LED Flashlight Driver
, 2MHz/1MHz, Synchronous Buck-Boost
, 600kHz, Synchronous Buck-Boost
V
SWA
SWB
IN
BUCK-BOOST
SW1
1MHz
●
4.7μH
L1
www.linear.com
GND (EXPOSED PAD)
SW2
SWD
SWC
V
OUT
LTC3454
LED
EN2
I
I
SET1
SET2
LED
4.7μF
COMMENTS
V
MS10 Package/EDD Package
V
ThinSOT Package
V
ThinSOT Package
V
ThinSOT Package/SC70 Package
V
QFN-24 Package
V
DFN Package
V
DFN Package
V
MS-10 Package/DFN Package
V
DFN Package
V
DFN Package
V
QFN-16 Package
V
ThinSOT Package
V
DFN Package
V
DFN Package/TSOPP Package
R
6.19k
1%
3453 TA02
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
ISET1
I
LED
: 1.6V to 18V, V
: 2.6V to 16V, V
: 1V to 10V, V
: 2.5V to 10V, V
: 2.8V to 4.5V, V
: 2.9V to 4.4V, V
: 2.9V to 4.4V, V
: 2.4V to 5.5V, V
: 2.4V to 5.5V, V
: 1V to 3.2V, V
: 2.7V to 5.5V, Up to 500mA Continuous Output Current,
: 2.7V to 16V, V
: 2.7V to 24V, V
: 2.5V to 24V, V
= 500mA
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
100
85
75
60
95
90
80
70
65
= 34V, I
= 4V, I
2.7
= 34V, I
= 34V, I
= 34V, I
= 34V, I
= 40V, I
= 40V, I
= 6V, I
= 5.5V, I
= 5.5V, I
= 5.25V, I
= 5.25V, I
© LINEAR TECHNOLOGY CORPORATION 2005
I
T
EFFICIENCY = (V
LED
A
LED Power Effi ciency vs V
= 25°C
3.1
Q
= 500mA
Q
Q
= 20μA, I
= 1.2mA, I
Q
Q
Q
Q
Q
Q
= 50μA, I
Q
Q
= 1.8mA, I
= 4.2mA/5.5mA, I
= 1.9mA, I
= 1.9mA, I
= 5mA, I
= 6.5mA, I
3.5
Q
Q
= 300μA, I
= 300μA, I
LT 0309 REV A • PRINTED IN USA
= 25μA/50μA, I
= 28μA, I
OUT
3.9
SD
V
IN
SD
SD
SD
– V
= 20μA,
(V)
SD
SD
SD
SD
LED
4.3
< 1μA,
< 1μA,
< 16μA,
SD
SD
SD
< 1μA,
< 1μA,
< 1μA,
< 1μA,
)I
< 2.5μA,
< 2.5μA,
< 1μA,
LED
4.7
SD
SD
/V
IN
< 1μA,
<1 μA,
I
IN
5.1
3454 TA02b
IN
3454fa
5.5