LTC3452 datasheet(2/16 Pages) LINER

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LTC3452

3452f

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

LEDL1 to LEDL5 Voltage ... – 0.3V to (VOUT + 0.3V) or 6V

LEDH1, LEDH2 Voltage ..... – 0.3V to (VOUT + 0.3V) or 6V

VC, ENL, ENH,

ISETL, ISETH Voltage ............ – 0.3V to (VIN + 0.3V) or 6V

LEDL1 to LEDL5 Current ....................................... 50mA

LEDH1, LEDH2 Current ....................................... 250mA

Operating Temperature Range (Note 2) .. – 40

°C to 85°C

Junction Temperature (Note 3) ............................ 125

°C

Storage Temperature Range ................ – 65

°C to 125°C

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

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

LTC3452EUF

ORDER PART NUMBER

UF PART MARKING

TJMAX = 125°C, θJA = 40°C/W

EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB

20 19 18 17 16

TOP VIEW

UF PACKAGE

20-LEAD (4mm

× 4mm) PLASTIC QFN

VIN

ENL

ISETL

LEDL1

LEDL2

ENH

ISETH

LEDH2

GND

3452

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Supply Voltage (VIN)

●

2.7

5.5

Input DC Supply Current

Normal Operation

2.7V

≤ VIN ≤ 5.5V, RISETL = RISETH = 51.1k, ILEDx = 0 (Note 4)

0.6

Shutdown

2.7V

≤ VIN ≤ 5.5V, VENL = VENH = 0V

6.5

µA

UVLO

VIN < UVLO Threshold

µA

Undervoltage Lockout Threshold

VIN Rising

●

2.0

2.3

VIN Falling

1.6

1.87

ENL,H DC Threshold for Normal Operation (VIH)

2.7V

≤ VIN ≤ 5.5V, VENL,H Rising

●

0.54

1.2

ENL,H DC Threshold for Shutdown (ILEDx = 0)

2.7V

≤ VIN ≤ 5.5V, VENL,H Falling

●

0.2

0.52

(VIL)

ENL,H Input Current (IIH, IIL)

2.7V

≤ VIN ≤ 5.5V

●

–1

µA

ENL PWM Frequency

2.7V

≤ VIN ≤ 5.5V (Note 5)

●

kHz

ISETL,H Servo Voltage

RISETL = RISETH = 20k

788

800

812

●

780

800

812

LEDHx Output Current Ratio (ILEDHx/ISETH)ILEDHx = 100mA, VLEDHx = 300mV

730

768

806

mA/mA

●

714

768

806

mA/mA

LEDHx Output Current Matching

(Max – Min)/[(Max + Min)/2] • 100%, ILEDHx = 100mA,

VLEDHx = 300mV, 2.7V ≤ VIN ≤ 5.5V

LEDHx Pin Voltage

ILEDHx = 100mA

250

The

● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.

VIN = PVIN = VOUT = 3.6V unless otherwise specified. (Note 2)

ELECTRICAL CHARACTERISTICS

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/

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