LTC3454EDD#PBF Linear Technology, LTC3454EDD#PBF Datasheet - Page 3

• 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

temperature range, otherwise specifi cations are at T
PARAMETER
Oscillator Frequency
Soft-Start Time
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3454 is guaranteed to meet specifi cations from 0°C to
70°C. Specifi cations over the –40°C to 85°C operating temperature range
are assured by design, characterization and correlation with statistical
process controls.
TYPICAL PERFORMANCE CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
804
796
788
812
808
800
792
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
–55
–55
Undervoltage Lockout Threshold
vs Temperature
I
vs Temperature
SET1,2
V
R
IN
ISET1,2
–35
–35
= 3.6V
–15
–15
Servo Voltage
= 15k
TEMPERATURE (°C)
TEMPERATURE (°C)
5
5
25
25
V
IN
V
45
45
IN
FALLING
RISING
65
65
85 105
85 105
3454 G01
3454 G04
125
125
CONDITIONS
1200
1100
1000
812
808
796
788
900
800
700
600
500
400
300
200
804
800
792
2.7
–55
A
I
Enable Thresholds
vs Temperature
SET1,2
V
T
R
= 25°C. V
IN
A
ISET1
–35
= 25°C
3.1
= 3.6V
The
–15
= R
Servo Voltage vs V
3.5
ISET2
TEMPERATURE (°C)
l
IN
5
denotes the specifi cations which apply over the full operating
= 15k
= 3.6V, R
3.9
25
V
IN
Note 3: T
dissipation PD according to the following formula:
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: This parameter is tested using a feedback loop which servos V
to 1.8V.
(V)
45
4.3
T
J
65
ISET
= T
4.7
V
IL
J
A
IN
85 105
= 20.5k unless otherwise noted. (Note 2)
is calculated from the ambient temperature T
+ (PD • θ
V
5.1
IH
3454 G02
3454 G05
125
5.5
JA
°C/W).
1200
1100
1000
900
800
700
600
500
400
300
200
812
808
796
788
804
800
792
2.7
3
I
Enable Thresholds vs V
T
SET1,2
V
T
A
MIN
A
IN
0.9
= 25°C
= 25°C
3.1
= 3.6V
7
Servo Voltage vs R
3.5
11
TYP
200
1.0
R
15
3.9
ISET
V
IN
LTC3454
(V)
(kΩ)
19
4.3
A
MAX
1.15
and power
V
V
IL
IH
23
IN
4.7
ISET
5.1
27
UNITS
3454 G03
3454 G06
3454fa
MHz
3
C
5.5
31
μs