LTC3454EDD#PBF Linear Technology, LTC3454EDD#PBF Datasheet - Page 2

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

Specifications of LTC3454EDD#PBF

• 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%
• Led Driver Application: Flashlight, Digital Cameras, PDAs
• No. Of Outputs: 1
• Output Current: 1A
• Output Voltage: 5.35V
• Input Voltage: 2.7V To 5.5V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PARAMETER
Input Supply Voltage (V
Input DC Supply Current
Undervoltage Lockout Threshold
V
V
V
I
LED Output Current to Programming Current Ratio
LED Pin Voltage
Regulated Maximum V
PMOS Switch R
NMOS Switch R
Forward Current Limit
Reverse Current Limit
PMOS Switch Leakage
NMOS Switch Leakage
LTC3454
ORDER INFORMATION
temperature range, otherwise specifi cations are at T
2
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
V
LED Peak Current ...................................................1.25A
Storage Temperature Range ...................–65°C to 125°C
Operating Temperature Range (Note 2)....–40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
LEAD FREE FINISH
LTC3454EDD#PBF
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
ELECTRICAL CHARACTERISTICS
SET1
EN1
EN1
EN1
Normal Operation
Shutdown
UVLO
IN
C
, EN1, EN2, I
Voltage .............................–0.3V to (V
, V
, V
, V
, SW1, SW2, V
and I
EN2
EN2
EN2
SET2
DC Threshold for Normal Operation (V
DC Threshold for Shutdown (V
Input Current
Servo Voltage
ON
ON
SET1
OUT
IN
OUT
)
, I
SET2
TAPE AND REEL
LTC3454EDD#TRPBF
Voltage ...................... –0.3V to 6V
IL
)
IH
)
IN
CONDITIONS
(Typicals at V
V
V
3.08k ≤ R
I
I
LED Pin Open, Programmed I
Switches A and D (V
Switches B and C
Switch A
Switch D (V
Switches A, D
Switches B, C
http://www.linear.com/leadfree/
LED
LED
IN
IN
2.7V ≤ V
2.7V ≤ V
V
+ 0.3V) or 6V
PART MARKING
LBQX
IN
Rising
Falling
/(I
= 1A
http://www.linear.com/tapeandreel/
A
< UVLO Threshold, V
ISET1
= 25°C. V
ISET1
IN
IN
+ I
OUT
The
≤ 5.5V (Note 4)
≤ 5.5V, V
IN
ISET2
||R
= 3.6V, R
= 3.6V)
ISET2
l
IN
), I
denotes the specifi cations which apply over the full operating
OUT
= 3.6V, R
EN1
LED
≤ 20.5k
ISET1
= 3.6V)
PIN CONFIGURATION
= V
= 500mA (Note 5)
EN1
EN2
LED
PACKAGE DESCRIPTION
10-Lead (3mm × 3mm) Plastic DFN
= R
= V
ISET
= 0V
ISET2
= 1A
EN2
= 20.5k unless otherwise noted. (Note 2)
= V
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
= 20.5k)
IN
I
I
10-LEAD (3mm 3mm) PLASTIC DFN
SET1
SET2
EN1
EN2
LED
T
JMAX
1
2
3
4
5
l
l
l
l
l
l
l
l
l
= 125°C, θ
DD PACKAGE
TOP VIEW
3725
3775
MIN
1.75
4.95
780
788
2.7
0.2
2.5
–1
–1
–1
11
JA
= 40°C/W
10
3850
3850
2.05
1.90
0.68
0.66
5.15
9
8
7
6
TYP
825
800
800
105
170
130
275
3.4
TEMPERATURE RANGE
–40°C to 85°C
0
5
SW1
V
V
V
SW2
IN
C
OUT
MAX
1200
3975
3925
5.35
812
812
5.5
2.3
1.2
10
1
1
1
1
mA/mA
mA/mA
UNITS
3454fa
mΩ
mΩ
mV
mV
mV
mA
μA
μA
μA
μA
μA
μA
V
V
V
V
V
V
A