LTC1697 datasheet(2/8 Pages) LINER

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LTC1697

1697f

VIN Voltage .................................................. –0.5V to 6V

VC, OVSEN, CDIM, RPROG, SW

Voltages ................................... –0.5V to (VIN + 0.3V)

SHDN, VDIM Pins ......................................... –0.5V to 6V

LAMP Pin ................................................. –0.5V to 0.5V

Operating Temperature Range (Note 5) ...–40°C to 85°C

Storage Temperature Range ..................–65°C to 125°C

Lead Temperature (Soldering, 10 sec).................. 300°C

ORDER PART

NUMBER

MS PART MARKING

TJMAX = 125°C,

θJA = 160°C/W 1 LAYER BOARD

LTZR

LTC1697EMS

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Notes 1, 2)

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

temperature range, otherwise specifications are at TA = 25°C. 2.8V < VIN ≤ 5.5V unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Operating Supply Voltage Range

(Note 2)

●

2.8

5.5

VUVLO

Undervoltage Lockout

●

2.77

IQ-SHDN

Quiescent Current - SHDN

SHDN = 0V; VDIM = 0V

µA

IQ-Active

Quiescent Current - Active

VC = 0V, SHDN = VIN = VDIM = 4.2V (Note 4)

0.9

1.5

ILEAK

Switch Leakage

0.1

µA

RON

Switch On Resistance

VIN = 4V

0.18

Ω

IMAX

Switch Current Limit

●

0.9

1.6

% DC

Duty Cycle

●

095

fSWITCH

Switching Frequency

●

240

300

370

kHz

fDIM

Dimming PWM Frequency

CDIM = 0.022µF (Note 3)

●

190

250

310

VDIM

VDIM Input Voltage

Dimming PWM Duty Cycle = 0%

1.0

Dimming PWM Duty Cycle = 100%

2.0

IDIM

VDIM Input Bias Current

VDIM = 2V

±1

µA

RLAMP

Internal RLAMP Resistance

LAMP Pin to GND

Ω

IL(ERROR)

Lamp Current Accuracy

|1– ILAMP(AVG)/(32/6.4k)| • 100% (Note 6)

●

ILAMP = 5mA

RP(RANGE)

Programming Resistor Range

(Note 10)

●

6.4

kΩ

VSHDN-H

SHDN Input High

1.2

VSHDN-L

SHDN Input Low (Note 9)

0.4

ISHDN

SHDN Input Current

VSHDN = VIN

●

0.1

µA

IOVSEN

Overvoltage Sense Protect Current (Note 7)

ILAMP = 5mA, RPROG = 6.4k

●

16.65

21.5

26.35

µA

VOVSEN

Overvoltage Sense Pin Voltage

●

0.95

1.2

1.5

VDIM(SD-I)

Passive Shutdown Voltage (Note 8)

●

0.4

VDIM(SD-H)

Not in Passive Shutdown

●

1.05

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

CDIM

VDIM

0VSEN

GND

SHDN

RPROG

VIN

LAMP

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