LTC3707IGN datasheet(4/32 Pages) LINER

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LTC3707

3707fb

Efﬁciency vs Output Current

(Figure 13)

Efﬁciency vs Input Voltage

(Figure 13)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX UNITS

fHIGH

Highest Frequency

VFREQSET = 2.4V

280

310

360

kHz

IFREQSET

FREQSET Input Current

VFREQSET = 0V

–2

–1

μA

3.3V Linear Regulator

V3.3OUT

3.3V Regulator Output Voltage

No Load

3.20

3.35

3.45

V3.3IL

3.3V Regulator Load Regulation

I3.3 = 0 to 10mA

0.5

V3.3VL

3.3V Regulator Line Regulation

6V < VIN < 30V

0.05

0.2

PGOOD Output

VPGL

PGOOD Voltage Low

IPGOOD = 2mA

0.1

0.3

IPGOOD

PGOOD Leakage Current

VPGOOD = 5V

μA

VPG

PGOOD Trip Level, Either Controller

VOSENSE Respect to Set Output Voltage

VOSENSE Ramping Negative

VOSENSE Ramping Positive

–6

–7.5

7.5

–9.5

9.5

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 LTC3707E is 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 LTC3707I is guaranteed to meet

performance speciﬁcations over the full – 40°C to 85°C operating

temperature range.

Note 3: TJ is calculated from the ambient temperature TA and power

dissipation PD according to the following formula:

LTC3707EGN = TJ = TA + (PD • 85°C/W)

Note 4: The LTC3707 is tested in a feedback loop that servos VITH1, 2 to a

speciﬁed voltage and measures the resultant VOSENSE1, 2.

Note 5: Dynamic supply current is higher due to the gate charge being

delivered at the switching frequency. See Applications Information.

Note 6: Rise and fall times are measured using 10% and 90% levels. Delay

times are measured using 50% levels.

Note 7: The IC minimum on-time is tested under an ideal condition

without external power FETs. It can be different when the IC is working in

an actual circuit. See Minimum On-Time Considerations in the Application

Information section.

Note 8: VFREQSET pin internally tied to a 1.19V reference through a

large resistance.

TYPICAL PERFORMANCE CHARACTERISTICS

Efﬁciency vs Output Current

and Mode (Figure 13)

OUTPUT CURRENT (A)

0.001

100

0.01

0.1

3707 G01

FORCED

CONTINUOUS

MODE (PWM)

CONSTANT

FREQUENCY

(BURST DISABLE)

Burst Mode

OPERATION

VIN = 15V

VOUT = 5V

OUTPUT CURRENT (A)

0.001

3707 G02

0.01

0.1

100

VIN = 10V

VIN = 15V

VIN = 7V

VIN = 20V

VIN = 15V

VOUT = 5V

INPUT VOLTAGE (V)

3707 G03

100

VOUT = 5V

IOUT = 3A

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

temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted.

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