LT3506 datasheet(3/24 Pages) LINER

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LT3506/LT3506A

3506afb

The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C, VIN = 5V, VBOOST = 8V, unless otherwise noted. (Note 2)

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN(MIN)

Undervoltage Lockout

●

3.4

3.6

IINQ

Quiescent Current

Not Switching

3.8

4.8

IINSD

Shutdown Current

VRUNSS = 0V

µA

VFB

Feedback Voltage

–40°C to 85°C, EDHD

–40°C to 85°C, EFE

–40°C to 125°C, IFE, IDHD

●

792

784

800

808

816

IFB

FB Pin Bias Current

VFB = 800mV, VC = 0.4V

●

100

VFB(REG)

Reference Line Regulation

VIN = 5V to 25V

0.005

%/V

gmEA

Error Amp GM

350

uMhos

Error Amp Voltage Gain

400

IVC

VC Source Current

VC Sink Current

VFB = 0.6V, VC = 0V

VFB = 1.2V, VC = 1100mV

µA

VVC(THRESH)

VC Switching Threshold

0.7

VVC(CLAMP)

VC Clamp Voltage

1.9

fSW

Switching Frequency

LT3506

LT3506A

500

575

1.1

650

1.2

kHz

MHz

Switching Phase

(Note 5)

180

Deg

Maximum Duty Cycle

LT3506

LT3506A

VFB(SWTHRESH)

Frequency Shift Threshold on FB

0.4

fFOLD

Foldback Frequency

VFB = 0V

170

kHz

ISW

Switch Current Limit

(Note 3)

2.0

2.6

3.6

VSW(SAT)

Switch VCESAT (Note 4)

ISW = 1A

210

ILSW

Switch Leakage Current

µA

VBOOST(MIN)

Minimum Boost Voltage Above Switch

ISW = 1A

1.5

2.5

IBOOST

BOOST Pin Current

ISW = 1A

IRUN/SS

RUN/SS Current

2.1

µA

VRUN/SS(THRESH)

RUN/SS Threshold

0.3

0.8

VFB(PGTHRESH)

VFB PG Threshold

VFB Rising

720

VPG(LOW)

PG Voltage Output Low

VFB = 640mV, IPG = 250µA

0.22

0.4

ILPG

PG Pin Leakage

VPG = 2V

0.1

µA

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LT3506E/LT3506AE are guaranteed to meet performance

specifications from 0°C to 85°C. Specifications over the –40°C to 85°C

operating temperature range are assured by design, characterization and

correlation with statistical process controls. The LT3506I/LT3506AI are

guaranteed and tested over the full –40°C to 125°C operating temperature

range.

Note 3: Current limit is guaranteed by design and/or correlation to static

test. Slope compensation reduces current limit at high duty cycle.

Note 4: Switch VCESAT guaranteed by design.

Note 5: Switching phase is guaranteed by design.

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