LTM8080

3

Rev. 0

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PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

RUN Threshold Voltage

Rising

l

0.9

1.0

1.2

V

RUN Current

RUN = 2V

1

μA

SYNC Threshold Voltage

Synchronization

0.4

1.5

V

SYNC Threshold Voltage

To Enable Spread Spectrum

2.9

4.2

V

SYNC Current

SYNC = 2V

1

μA

SS Current

SS = 0V

2

μA

SS Pull-Down

SS = 0.1V

300

Ω

LDO

Output Voltage Range

l

0

8

V

SET Pin Current (ISET)

IOUT = 1mA, VOUT = 1.3V,

3.5V < VIN < 40V, 0V < VOUT < 8V, 1mA < IOUT < 500mA

l

99

100

101

μA

Fast Start-Up SET Pin Current

VPGFB = 289mV, VOUT = 1.3V

2

mA

Output Current

(Note 3)

500

mA

Output Offset Voltage VOS

(VOUT to VSET)

VIN = 12V, IOUT = 1mA, VOUT = 1.3V

3.5V < VIN < 40V, 0V < VOUT < 8V, 1mA < IOUT < 500mA

l

–1

–2

1

2

mV

mV

Line Regulation: ∆ISET

Line Regulation: ∆VOS

VIN = 3.5V to 40V, IOUT = 1mA, VOUT = 1.3V

VIN = 3.5V to 40V, IOUT = 1mA, VOUT = 1.3V

l

l

0.5

0.5

±2

±3

nA/V

μV/V

Load Regulation: ∆ISET

Load Regulation: ∆VOS

IOUT = 1mA to 500mA, VOUT = 1.3V, VIN = 24V

IOUT = 1mA to 500mA, VOUT = 1.3V , VIN = 24V

l

0.15

0.1

0.5

μA

mV

Output Noise Spectral Density

(Note 4)

IOUT = 500mA, Frequency = 10kHz, COUT = 10µF,

CSET = 0.47µF, 1.3V ≤ VOUT ≤ 15V

IOUT = 500mA, Frequency = 10kHz, COUT = 10µF,

CSET = 0.47µF, 0V ≤ VOUT < 1.3V

2

5

nV/√Hz

nV/√Hz

Output RMS Noise (Note 4)

IOUT = 500mA, BW = 10Hz to 100kHz, COUT = 10µF,

CSET = 4.7µF, 1.3V ≤ VOUT ≤ 15V

IOUT = 500mA, BW = 10Hz to 100kHz, COUT = 10µF,

CSET = 4.7µF, 0V ≤ VOUT < 1.3V

0.8

1.8

µVRMS

µVRMS

Internal Current Limit

700

mA

PGFB Threshold Voltage

Rising

300

mV

PG Leakage Current

VPG = 8V

1

μA

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 LTM8080E is guaranteed to meet performance specifications

from 0°C to 125°C internal. Specifications over the full –40°C to

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

characterization, and correlation with statistical process controls. The

LTM8080I is guaranteed to meet specifications over the full –40°C

to 125°C internal operating temperature range. The LTM8080MP

is guaranteed to meet specifications over the full –55°C to 125°C

internal operating 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: The maximum current out of either channel may be limited by the

internal temperature of the LTM8080.

Note 4: Not tested in production.

ELECTRICAL CHARACTERISTICS The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 12V unless otherwise noted (Note 2).