LTC3453 datasheet(2/12 Pages) LINER

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LTC3453

3453fa

VIN, PVIN, SW1, SW2, VOUT Voltage ............ –0.3V to 6V

LED1 to LED4 Voltage ...... –0.3V to (VOUT + 0.3V) or 6V

VC, EN1, EN2,

ISET1, ISET2 Voltage .......... –0.3V to (VIN + 0.3V) or 6V

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

ORDER PART NUMBER

UF PART MARKING

TJMAX = 125°C, θJA = 40°C/W, θJC = 2.6°C/W

EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB

Consult LTC Marketing for parts specified with wider operating temperature ranges.

3453

LTC3453EUF

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

16 15 14 13

UF PACKAGE

16-LEAD (4mm

× 4mm) PLASTIC QFN

TOP VIEW

VIN

EN1

ISET1

LED1

EN2

ISET2

LED4

Order Options Tape and Reel: Add #TR

Lead Free: Add #PBF

Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marking: http://www.linear.com/leadfree/

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Supply Voltage

●

2.7

5.5

Input DC Supply Current

Normal Operation

2.7V

≤ VIN ≤ 5.5V, RISET1||RISET2 = 51.1k, ILEDx = 0 (Note 4)

0.6

Shutdown

2.7V

≤ VIN ≤ 5.5V; VEN1 = VEN2 = 0V

µA

UVLO

VIN < UVLO Threshold

µA

Undervoltage Lockout Threshold

VIN Rising

●

2.3

VIN Falling

1.6

1.9

EN1,2 DC Threshold for Normal Operation

2.7V

≤ VIN ≤ 5.5V, VEN1,2 Rising

●

0.65

EN1,2 DC Threshold for Shutdown (ILEDx = 0) 2.7V ≤ VIN ≤ 5.5V, VEN1,2 Falling

●

0.2

0.63

EN1,2 Input Current

VEN1,2 = 3.6V

●

–1

µA

ISET1,2 Servo Voltage

RISET1,2 = 4.12k, 0°C ≤ TA ≤ 85°C

788

800

812

RISET1,2 = 4.12k, –40°C ≤ TA ≤ 85°C

●

780

800

812

LED Output Current Ratio

ILED/(ISET1 + ISET2), ILEDx = 75mA, VLEDx = 300mV,

365

384

403

mA/mA

2.7V

≤ VIN ≤ 5.5V

●

357

384

403

mA/mA

LED Output Current Matching

(MAX – MIN)/[(MAX + MIN)/2] • 100%, ILEDx = 75mA

VLEDx = 300mV

LED Pin Drain Voltage

ILEDx = 75mA

130

Regulated Maximum VOUT

VLEDx = 0V

●

4.4

4.5

4.6

PMOS Switch RON

Switches A and D, @ 100mA

0.3

Ω

NMOS Switch RON

Switches B and C, @ 100mA

0.25

Ω

Forward Current Limit

Switch A

1125

1612

2100

Reverse Current Limit

Switch D

200

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C, VIN = VOUT = 3.6V unless otherwise noted. (Note 2)

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