LTC7130 datasheet(4/36 Pages) LINER

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LTC7130

7130fb

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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 = 12V, VRUN = 5V unless otherwise specified.

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 LTC7130 is tested under pulsed load conditions such that

TJ ≈ TA. The LTC7130E is guaranteed to meet performance specifications

from 0°C to 85°C operating 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 LTC7130I is guaranteed to meet performance specifications over the

full –40°C to 125°C operating junction temperature range. The maximum

ambient temperature consistent with these specifications is determined

by specific operating conditions in conjunction with board layout, the

package thermal impedance and other environmental factors. The thermal

derating curves are based on the LTC7130 demo board.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

CLKOUT

Phase Relative to the

Oscillator Clock

180

Deg

CLKOUTHI

Clock Output High Voltage

VINTVCC = 5.5V

4.5

5.5

CLKOUTLO

Clock Output Low Voltage

0.2

PGOOD Output

VPGDLO

PGOOD Voltage Low

IPGOOD = 2mA

0.1

0.3

IPGD

PGOOD Leakage Current

VPGOOD = 5.5V

µA

VPGD

PGOOD Trip

VFB with Respect to Set Output Voltage

VFB Going Negative

VFB Going Positive

–10

Differential Amplifier

Gain

–40°C to 125°C

0.997

1.003

V/V

RIN

Input Resistance

Measured at DIFFP Input

kΩ

VOS

Input Offset Voltage

VDIFFP = 1.5V, VDIFFOUT = 100µA

PSRR

Power Supply Rejection Ratio 5V < VIN < 20V (Note 7)

IOUT

Maximum Sourcing Output

Current

1.5

VOUT

Maximum Output Voltage

VINTVCC = 5.5V, IDIFFOUT = 300µA

VINTVCC – 1.4 VINTVCC – 1.1

GBW

Gain-Bandwidth Product

(Note 7)

MHz

Slew Rate

(Note 7)

V/µs

RDS(ON)

RTOP

Top Power NMOS On-

Resistance

7.3

mΩ

RBOTTOM

Bottom Power NMOS On-

Resistance

2.1

mΩ

Note 3: When 4.5V ≤ VIN ≤ 5.5V, INTVCC must be tied to VIN. Guaranteed

by design.

Note 4: The LTC7130 is tested in a feedback loop that servos VITH to a

specified voltage and measures the resultant VFB.

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

delivered at the switching frequency. See Applications Information.

Note 6: The minimum on-time condition corresponds to the on inductor

peak-to-peak ripple current ≥40% of IMAX (see Minimum On-Time

Considerations in the Applications Information section).

Note 7: Guaranteed by design.

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