LTC3706IGN datasheet(4/20 Pages) LINER

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LTC3706

3706fb

ELECTRICAL CHARACTERISTICS

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 LTC3706E is guaranteed to meet the performance speciﬁca-

tions over the 0°C to 85°C operating temperature range. Speciﬁcations

over the –40°C to 85°C operating temperature range are assured by

design, characterization and correlation with statistical process controls.

The LTC3706I is guaranteed and tested over the full –40°C to 85°C

operating temperature range.

Note 3: Junction temperature TJ (in °C) is calculated from the ambient tem-

perature TA and the average power dissipation PD (in Watts) by the formula:

TJ = TA + θJA • PD

Refer to the Applications Information section for details.

Note 4: The LTC3706 is tested in a feedback loop that servos VFB to a

voltage near the internal 0.6V reference voltage to obtain the speciﬁed ITH

voltage (VITH = 1.2V).

Note 5: Operating supply current is measured in test mode. Dynamic

supply current is higher due to the internal gate charge being delivered at

the switching frequency. See Typical Performance Characteristics.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Oscillator and Phase-Locked Loop

IFS

FS/SYNC Pin Sourcing Current

μA

fLOW

Oscillator Low Frequency Set Point

VFS/SYNC = GND

170

200

230

kHz

fHIGH

Oscillator High Frequency Set Point

VFS/SYNC = VCC

255

300

345

kHz

Δf (RFS)

Oscillator Resistor Set Accuracy

75kΩ < RFS/SYNC < 175kΩ

–20

fPLL(MAX)

Maximum PLL Sync Frequency

500

kHz

fPLL(MIN)

Minimum PLL Sync Frequency

kHz

PGOOD Output

VFBH/0.6

Power Good Upper Threshold

VFB Rising

115

117

119

VFBL1/0.6

Power Good Lower Threshold

VFB Rising

91.5

94.5

VFBL2/0.6

Power Good Lower Threshold

VFB Falling

89.5

92.5

Differential Ampliﬁer (VSENSE AMP)

ADA

Gain

VS– = GND, 1V ≤ VS+ ≤ 5V

0.994

1.006

V/V

CMRR DA

Common Mode Rejection Ratio

RIN

Input Resistance

kΩ

fBW

–3dB Bandwidth

3MHz

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