LTC3726IGN datasheet(3/16 Pages) LINER

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LTC3726

3726fb

The

● indicates specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 7V, GND = PGND = 0V, unless otherwise noted.

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 LTC3726E is guaranteed to meet the performance

specifications from 0

°C to 85°C junction temperature. Specifications over

the –40

°C to 85°C operating temperature range are assured by design,

characterization and correlation with statistical process controls. The

LTC3726I is guaranteed and tested over the full – 40

°C to 85°C operating

temperature range.

Note 3: Operating junction temperature TJ (in °C) is calculated from the

ambient temperature 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 LTC3726 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

VCC Supply

VCCOP

Operating Voltage Range

ICC

Supply Current

Operating

fOSC = 200kHz (Note 5)

4.2

Shutdown

VRUN/SS = GND

700

µA

VUVLO

UV Lockout

VCC Rising

●

4.52

4.60

4.70

VHYS

UV Hysteresis

0.4

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

∆f (RFS)

Oscillator Resistor Set Accuracy

75k

Ω < RFS/SYNC < 175kΩ

–20

fPLL(MAX)

Maximum PLL Sync Frequency

500

kHz

fPLL(MIN)

Minimum PLL Sync Frequency

kHz

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