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LTC3111

3111fa

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ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified operating

junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = VOUT = PWM/SYNC = RUN = 5V unless otherwise

noted.

PARAMETER

CONDITION

MIN

TYP

MAX

UNITS

Input Operating Range

2.5

VIN UVLO Threshold

Rising

1.9

2.1

2.3

VIN UVLO Hysteresis

200

VCC UVLO Threshold

Rising

2.2

2.35

2.5

VCC UVLO Hysteresis

190

Output Voltage Adjust Range

2.5

INTVCC Clamp Voltage

VIN = 5V or 15V

3.9

4.2

4.5

Quiescent Current—Burst Mode Operation

FB = 1V, PWM/SYNC = 0V

µA

Quiescent Current—Shutdown

RUN = VOUT = VCC = 0V, Not Including Switch Leakage

µA

Feedback Voltage

PWM Operation

0.78

0.8

0.82

Feedback Leakage

FB = 0.8V

NMOS Switch Leakage

Switches A, B, C, D, VIN = VOUT = 15V

0.5

µA

NMOS Switch On-Resistance

Switch A

mΩ

Switch B, C, D

105

mΩ

Input Current Limit

2.3

3.7

Peak Current Limit

5.8

Burst Current Limit

PWM/SYNC = 0V

0.8

Burst Zero Current Threshold

PWM/SYNC = 0V

0.1

Reverse Current Limit

–1

Maximum Duty Cycle

Percentage of the Period SW2 is Low in Boost Mode

(Note 7)

Minimum Duty Cycle

Percentage of the Period SW1 is Low in Buck Mode

(Note 7)

SW1, SW2 Minimum Low Time

(Note 7)

160

Frequency

PWM/SYNC = 5V

700

800

900

kHz

SYNC Frequency Range

(Note 6)

600

1500

kHz

PWM/SYNC Threshold

0.5

0.9

1.5

RUN Threshold to Enable VCC

Rising

0.35

0.8

1.15

RUN Threshold to Disable VCC

Falling

0.3

RUN Threshold to Enable Switching

Rising

1.15

1.18

1.23

RUN Hysteresis

120

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 lifetimes.

Note 2: The LTC3111 is tested under pulsed load conditions such that

TJ ≈ TA. The LTC3111E is guaranteed to meet specifications from

0°C to 85°C junction temperature. Specifications over the –40°C to

125°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LTC3111I is guaranteed to meet performance specifications from –40°C

to 125°C junction temperature, the LTC3111H is guaranteed to meet

performance specifications from –40°C to 150°C junction temperature

and the LTC3111MP is guaranteed and tested to meet performance

specifications from –55°C to 150°C junction temperature. High junction

temperatures degrade operating lifetimes: operating lifetime is derated

for junction temperatures greater than 125°C. Note that the maximum

ambient temperature consistent with these specifications is determined by

specific operating conditions in conjunction with board layout, the rated

package thermal resistance and other environmental factors.

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