LTC3452 Linear Technology, LTC3452 Datasheet - Page 2

• Manufacturer Part Number: LTC3452
• Description: Synchronous Buck-Boost MAIN/CAMERA White LED Driver
• Manufacturer: Linear Technology

ABSOLUTE AXI U RATI GS
(Note 1)
The
V
PARAMETER
Input Supply Voltage (V
Input DC Supply Current
Undervoltage Lockout Threshold
EN
EN
(V
EN
EN
I
LED
LED
LED
LTC3452
V
LED
LED
V
I
LED
LED
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Junction Temperature (Note 3) ............................ 125°C
Storage Temperature Range ................ – 65°C to 125°C
ELECTRICAL CHARACTERISTICS
2
SETL,H
SETL
IN
IN
C
Normal Operation
Shutdown
UVLO
IL
L,H
L,H
L,H
L
, EN
)
Hx
Hx
Hx
= PV
, PV
PWM Frequency
●
L1
H1
L1
H1
DC Threshold for Normal Operation (V
DC Threshold for Shutdown (I
Input Current (I
, I
Output Current Ratio (I
Output Current Matching
Pin Voltage
Servo Voltage
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
, LED
, LED
L
to LED
to LED
SETH
IN
IN
, EN
, SW1, SW2, V
= V
H2
H
H2
Voltage ............ – 0.3V to (V
OUT
,
L5
L5
Voltage ..... – 0.3V to (V
Current ....................................... 250mA
= 3.6V unless otherwise specified. (Note 2)
Voltage ... – 0.3V to (V
Current ....................................... 50mA
IH
, I
IN
W
IL
)
)
LEDHx
OUT
/I
W W
LEDx
SETH
Voltage ........... – 0.3V to 6V
= 0)
)
IH
)
CONDITIONS
2.7V ≤ V
2.7V ≤ V
V
V
V
2.7V ≤ V
2.7V ≤ V
2.7V ≤ V
2.7V ≤ V
R
I
(Max – Min)/[(Max + Min)/2] • 100%, I
V
I
LEDHx
LEDHx
OUT
OUT
IN
IN
IN
LEDHx
ISETL
IN
< UVLO Threshold
Rising
Falling
+ 0.3V) or 6V
+ 0.3V) or 6V
+ 0.3V) or 6V
= R
= 100mA, V
= 100mA
= 300mV, 2.7V ≤ V
U
IN
IN
IN
IN
IN
IN
ISETH
≤ 5.5V, R
≤ 5.5V, V
≤ 5.5V, V
≤ 5.5V, V
≤ 5.5V
≤ 5.5V (Note 5)
= 20k
LEDHx
ISETL
ENL
ENL,H
ENL,H
= V
= 300mV
= R
Rising
Falling
IN
ENH
≤ 5.5V
ISETH
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
= 0V
ORDER PART NUMBER
= 51.1k, I
LEDHx
LTC3452EUF
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
LEDx
= 100mA,
LED
LED
I
SETL
EN
V
= 0 (Note 4)
L1
L2
IN
L
20-LEAD (4mm × 4mm) PLASTIC QFN
1
2
3
4
5
http://www.linear.com/leadfree/
T
JMAX
20 19 18 17 16
6
= 125°C, θ
UF PACKAGE
TOP VIEW
7
●
●
●
●
●
●
●
●
21
8
MIN
788
780
730
714
JA
2.7
1.6
0.2
–1
10
9 10
= 40°C/W
U
UF PART MARKING
www.DataSheet4U.com
1.87
0.54
0.52
TYP
800
800
768
768
250
0.6
6.5
2.0
15
14
13
12
11
3
1
A
3452
V
EN
I
LED
GND
= 25°C.
W
SETH
C
H
H2
MAX
812
812
806
806
5.5
2.3
1.2
18
1
5
1
6
mA/mA
mA/mA
UNITS
U
3452f
kHz
mA
mV
mV
mV
µA
µA
µA
%
V
V
V
V
V