LTC3454EDD#PBF Linear Technology, LTC3454EDD#PBF Datasheet - Page 6

• 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

LTC3454
BLOCK DIAGRAM
6
2.7V TO 5.5V
V
IN
R
R
ISET1
ISET2
9
8
3
4
1
2
V
EN1
EN2
V
I
I
UNDERVOLTAGE
SET1
SET2
IN
C
PROTECTION
REFERENCE
OVERTEMP
BANDGAP
LOCKOUT
800mV
800mV
V
OUT
123k
377k
OPTIONAL
UV
OT
1.23V
+
–
+
–
3.4A
1.23V
LED CURRENT
SETTING AMP 1
LED CURRENT
SETTING AMP 2
SWITCH A
+
–
+
–
SWITCH B
–
+
COMPARATOR
FORWARD
CURRENT
AB PWM
LIMIT
1.23V
10
UV
ERROR AMP
SW1
SAFETY
I
I
ISET1
ISET2
CONDUCTION
OSCILLATOR
ANTICROSS-
DRIVERS
∑
LOGIC
1MHz
GATE
AND
SHUTDOWN
AUTOZEROING
ERROR AMP
I
COMPARATOR
SW2
CURRENT
CURRENT
REVERSE
MIRROR
CLAMP
CD PWM
START
SOFT-
LIMIT
OT
6
SWITCH C
SWITCH D
–
+
3850 I
–
+
–
+
11
EXPOSED PAD (GND)
275mA
R
R
OPTIONAL
V
LED
OUT
3454 BD
7
5
3454fa