MAX1968 datasheet(4/16 Pages) MAXIM

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Power Drivers for Peltier TEC Modules

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ELECTRICAL CHARACTERISTICS

(VDD = PVDD1 = PVDD2 = SHDN = 5V, PGND1 = PGND2 = FREQ = GND, CTLI = MAXV = MAXIP = MAXIN = REF, CREF = 1µF,

CCOMP = 0.1µF, LLX_ = 3.3µH, CCS = COS2 = 1µF, ITEC < 3ARMS (MAX1968), ITEC < 6ARMS (MAX1969), TA = -40°C to +85°C, unless

otherwise noted.) (Note 4)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Supply Range

VDD

3.0

5.5

VDD = 5V, ITEC = 0 to

±3A,

VOUT = VOS1 - VOS2 (MAX1968)

-4.3

+4.3

VDD = 5V, ITEC = 0 to 6A,

VOUT = VOS1 (MAX1969)

4.3

VDD = 3V, ITEC = 0 to

±3A,

VOUT = VOS1 - VOS2 (MAX1968)

-2.3

+2.3

Output Voltage Range

VOUT

VDD = 3V, ITEC = 0 to 6A,

VOUT = VOS1 (MAX1969)

2.3

MAX1968

±3

Maximum TEC

Current

ITEC(MAX)

MAX1969

Reference Voltage

VREF

VDD = 3V to 5.5V, IREF = 150µA

1.475

1.515

Reference Load

Regulation

∆VREF

VDD = 3V to 5.5V, IREF = +10µA to -1mA

VMAXI_ = VREF

135

165

VOS1 < VCS

VMAXI_ = VREF / 3

VMAXI_ = VREF

135

165

Current-Sense

Threshold Accuracy

VOS1 > VCS

VMAXI_ = VREF / 3

Switch-Fault Reset

Voltage

250

VDD = 5V, I = 0.5A

0.07

NFET On-Resistance

RDS(ON-N)

VDD = 3V, I = 0.5A

0.08

Ω

VDD = 5V, I = 0.5A

0.07

PFET On-Resistance

RDS(ON-P)

VDD = 3V, I = 0.5A

0.12

Ω

VLX = VDD = 5V, TA = +25

°C10

NFET Leakage

ILEAK(N)

VLX = VDD = 5V, TA = -40

°C10

µA

VLX = 0, TA = +25

°C10

PFET Leakage

ILEAK(P)

VLX = 0, TA = -40

°C10

µA

VDD = 5V

100

No Load Supply

Current

IDD(NO

LOAD)

VDD = 3.3V

Shutdown Supply

Current

IDD-SD

SHDN = GND, VDD = 5V (Note 2)

VDD rising

2.4

2.8

UVLO Threshold

VUVLO

VDD falling

2.25

2.75

Switching-Frequency

Internal Oscillator

fSW-INT

FREQ = GND

400

650

kHz

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