LTM4622 datasheet(3/24 Pages) AD

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LTM4663

Rev. A

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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 LTM4663 is tested under pulsed load conditions such

that TJ ≈ TA. The LTM4663E is guaranteed to meet performance

specifications over the 0°C to 125°C internal operating temperature

range. 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 LTM4663I is guaranteed to meet

specifications over the full –40°C to 125°C internal operating temperature

range. 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.

Note 3: 100% tested at wafer level.

Note 4: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

FREQ

Oscillator Frequency

2.0

MHz

SYNC

External Sync Frequency Range

1.85

3.25

MHz

VEN/SY Low

EN/SY Input Voltage Low Level

0.8

VEN/SY High

EN/SY Input Voltage High Level

2.1

Error Amp

VCM

Input Voltage Range

(Note 3)

SVIN

VOS

Input Offset Voltage

(Note 3)

100

µV

CMRR

Common Mode Rejection Ratio

(Note 3)

120

TEC Current Limit

VILIM

ILIM Input Range

Cooling

Heating

1.3

0.2

VREF – 0.2

1.2

IILIM

Current Limit Threshold

Cooling VILIM = 1.3V

VILIM = 1.8V

Heating VILIM = 1.2V

VILIM = 0.7V

220

1125

220

1125

300

1260

300

1260

360

1375

360

1375

TEC Voltage Limit

VVLIM

VLIM Input Range

0.2

SVIN/2

AVLIM

Voltage Limit Gain

(VLDR – VSFB)/VVLIM

V/V

TEC Current Measurement

RCS

Current Sense Gain

VIN = 5V

0.535

V/A

VITEC

TEC Current Measurement

Heating ILOAD = −1.5A

Heating ILOAD = −0.5A

Cooling ILOAD = 0.5A

Cooling ILOAD = 1.5A

0.45

0.98

1.52

2.05

TEC Voltage Measurement

AVTEC

Voltage Sense Gain

0.25

V/V

VVTEC

TEC Voltage Measurement

TEC = 4.8V,VLIM = 2.5V

TEC = 2.4V,VLIM = 2.5V

TEC = 0V,VLIM = 2.5V

TEC = −2.4V,VLIM = 2.5V

TEC = −4.8V,VLIM = 2.5V

2.45

1.85

1.25

0.625

0.05

VVTEC_RANGE VTEC Output Range

0.005

2.625

The l denotes the specifications which apply over the specified operating

temperature range, otherwise specifications are at TA = 25°C (Note 2), PVIN = SVIN = 5V, per the typical application.

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