LTM8022MPV datasheet(3/20 Pages) LINER

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LTM8022

8022fb

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 LTM8022E is guaranteed to meet performance speciﬁcations

from 0°C to 85°C ambient. Speciﬁcations over the full –40°C to

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

characterization and correlation with statistical process controls. The

LTM8022I is guaranteed to meet speciﬁcations over the full –40°C to 85°C

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input DC Voltage

3.6

VOUT

Output DC Voltage

0V < IOUT < 1A, RADJ Open

0V < IOUT < 1A, RADJ = 43.2k

0.8

RADJ(MIN)

Minimum Allowable RADJ

(Note 3)

42.2

kΩ

IOUT(MAX)

Continuous Output DC Current

4V < VIN < 36V, COUT = 51μF (Note 4)

IQVIN

VIN Quiescent Current

VRUN/SS = 0.2V, RT = 174k

VBIAS = 3V, Not Switching, RT = 174k (E, I)

VBIAS = 3V, Not Switching, RT = 174k (MP)

VBIAS = 0V, Not Switching, RT = 174k

0.1

0.5

350

120

μA

IQBIAS

BIAS Quiescent Current

VRUN/SS = 0.2V, RT = 174k

VBIAS = 3V, Not Switching, RT = 174k (E, I)

VBIAS = 3V, Not Switching, RT = 174k (MP)

VBIAS = 0V, Not Switching, RT = 174k

0.03

0.5

120

200

μA

ΔVOUT/VOUT

Line Regulation

3.6V < VIN < 36V, IOUT = 1A, VOUT = 3.3V

0.1

ΔVOUT/VOUT

Load Regulation

VIN = 24V, 0V < IOUT < 1A, VOUT = 3.3V,

COUT = 51μF

0.4

VOUT(AC_RMS)

Output Ripple (RMS)

VIN = 24V, IOUT = 1A, VOUT = 3.3V,

COUT = 51μF

fSW

Switching Frequency

RT = 113kΩ, COUT = 51μF

325

kHz

ISC(OUT)

Output Short-Circuit Current

VIN = 36V, VOUT = 0V

VADJ

Voltage at ADJ Pin

COUT = 51μF

765

790

805

VBIAS(MIN)

Minimum BIAS Voltage for Proper Operation

1.9

2.4

IADJ

Current Out of ADJ Pin

ADJ = 1V, COUT = 51μF

μA

IRUN/SS

RUN/SS Pin Current

VRUN/SS = 2.5V

μA

VIH(RUN/SS)

RUN/SS Input High Voltage

COUT = 51μF

2.5

VIL(RUN/SS)

RUN/SS Input Low Voltage

COUT = 51μF

0.2

VPG(TH)

PG Threshold

VFB Rising

730

IPGO

PG Leakage

VPG = 30V

0.1

μA

IPG(SINK)

PG Sink Current

VPG = 0.4V

200

800

μA

VSYNC(IL)

SYNC Low Threshold

fSYNC = 550kHz, COUT = 51μF

0.5

VSYNC(IH)

SYNC High Threshold

fSYNC = 550kHz, COUT = 51μF

0.7

ISYNC(BIAS)

SYNC Pin Bias Current

VSYNC = 0V

0.1

μA

The

l denotes the speciﬁcations which apply over the full operating temp-

erature range, otherwise speciﬁcations are at TA = 25°C. VIN = 10V, VRUN/SS = 10V, VBIAS = 3V, RT = 60.4kΩ, CIN = 2.2μF, COUT = 4.7μF,

unless otherwise speciﬁed. (Note 2)

ambient operating temperature range. The LTM8022MP is guaranteed to

meet speciﬁcations over the full –55°C to 125°C temperature range. Note

that the maximum internal temperature is determined by speciﬁc operating

conditions in conjunction with board layout, the rated package thermal

resistance and other environmental factors.

Note 3: Guaranteed by design.

Note 4: COUT = 51μF is composed of a 4.7μF ceramic capacitor and a 47μF

electrolytic.

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