LTC3453 LINER [Linear Technology], LTC3453 Datasheet - Page 2

• Manufacturer Part Number: LTC3453
• Description: Synchronous Buck-Boost High Power White LED Driver
• Manufacturer: LINER [Linear Technology]

ABSOLUTE AXI U RATI GS
LTC3453
(Note 1)
V
LED1 to LED4 Voltage ...... –0.3V to (V
V
LED1 to LED4 Peak Current ................................ 250mA
Storage Temperature Range .................. –65°C to 125°C
Operating Temperature Range (Note 2) ... –40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
temperature range, otherwise specifications are at T
PARAMETER
Input Supply Voltage
Input DC Supply Current
Undervoltage Lockout Threshold
EN1,2 DC Threshold for Normal Operation
EN1,2 DC Threshold for Shutdown (I
EN1,2 Input Current
I
LED Output Current Ratio
LED Output Current Matching
LED Pin Drain Voltage
Regulated Maximum V
PMOS Switch R
NMOS Switch R
Forward Current Limit
Reverse Current Limit
2
ELECTRICAL CHARACTERISTICS
SET1,2
Normal Operation
Shutdown
UVLO
IN
C
, EN1, EN2,
I
, PV
SET1
Servo Voltage
IN
, I
, SW1, SW2, V
SET2
ON
ON
Voltage .......... –0.3V to (V
OUT
W
OUT
W W
LEDx
Voltage ............ –0.3V to 6V
= 0) 2.7V ≤ V
CONDITIONS
2.7V ≤ V
2.7V ≤ V
V
V
V
2.7V ≤ V
V
R
R
I
2.7V ≤ V
(MAX – MIN)/[(MAX + MIN)/2] • 100%, I
V
I
V
Switches A and D, @ 100mA
Switches B and C, @ 100mA
Switch A
Switch D
LED
LEDx
IN
IN
IN
EN1,2
ISET1,2
ISET1,2
LEDx
LEDx
OUT
< UVLO Threshold
Rising
Falling
/(I
= 75mA
IN
SET1
= 300mV
= 0V
= 3.6V
= 4.12k, 0°C ≤ T
= 4.12k, –40°C ≤ T
IN
IN
IN
IN
IN
+ 0.3V) or 6V
+ 0.3V) or 6V
≤ 5.5V, R
≤ 5.5V; V
≤ 5.5V, V
≤ 5.5V, V
+ I
≤ 5.5V
U
A
SET2
= 25°C, V
), I
The
EN1
EN1,2
EN1,2
ISET1
LEDx
= V
A
●
||R
= 75mA, V
IN
Rising
Falling
≤ 85°C
A
denotes the specifications which apply over the full operating
EN2
ISET2
= V
≤ 85°C
= 0V
OUT
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:
= 51.1k, I
ORDER PART NUMBER
LEDx
= 3.6V unless otherwise noted. (Note 2)
= 300mV,
LEDx
LTC3453EUF
LEDx
EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB
= 75mA
= 0 (Note 4)
T
LED1
I
16-LEAD (4mm × 4mm) PLASTIC QFN
JMAX
SET1
EN1
V
IN
= 125°C, θ
http://www.linear.com/leadfree/
1
2
3
4
16 15 14 13
5
UF PACKAGE
●
●
●
●
●
●
●
●
TOP VIEW
JA
6
= 40°C/W, θ
17
1125
MIN
788
780
365
357
7
2.7
1.6
0.2
4.4
–1
8
U
UF PART MARKING
12
11
10
JC
9
= 2.6°C/W
1612
0.65
0.63
0.25
TYP
800
800
384
384
130
200
V
EN2
I
LED4
0.6
1.9
4.5
0.3
SET2
C
6
3
2
2
3453
W
MAX
2100
812
812
403
403
5.5
2.3
4.6
18
1
5
1
1
6
mA/mA
mA/mA
UNITS
3453fa
U
mA
mV
mV
mV
mA
mA
µA
µA
µA
%
Ω
Ω
V
V
V
V
V
V