MAX8521 datasheet(3/18 Pages) MAXIM

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Smallest TEC Power Drivers for Optical

Modules

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ELECTRICAL CHARACTERISTICS (continued)

(VDD = VPVDD1 = VPVDD2 = VSHDN = 5V, 1MHz mode (Note 3). PGND1 = PGND2 = GND, CTLI = MAXV = MAXIP = MAXIN = REF,

TA = 0°C to +85°C, unless otherwise noted. Typical values at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX8521, FREQ = VDD, VDD = 3V to 5V

0.8

1.0

1.2

MAX8521, FREQ = 0, VDD = 3V to 5V

0.4

0.5

0.6

MAX8520, REXT = 60k

Ω, VDD = 5V

0.8

1.0

1.2

MAX8520, REXT = 60k

Ω, VDD = 3V

0.76

0.93

1.10

MAX8520, REXT = 150k

Ω, VDD = 5V

0.4

0.5

0.6

Internal Oscillator Switching

Frequency

fSW-INT

MAX8520, REXT = 150k

Ω, VDD = 3V

0.36

0.46

0.56

MHz

External Sync Frequency Range

25% < duty cycle <75% (MAX8521 only)

0.7

1.2

MHz

LX_ Duty Cycle

(Note 5)

100

OS1, OS2, CS Input Current

IOS1, IOS2,

ICS

0 or VDD

-100

+100

µA

SHDN, FREQ Input Current

ISHDN,

IFREQ

0 or VDD, FREQ applicable for the

MAX8521 only

-5

µA

SHDN, FREQ Input Low Voltage

VIL

VDD = 3V to 5.5V, FREQ applicable for the

MAX8521 only

VDD x

0.25

SHDN, FREQ Input High Voltage

VIH

VDD = 3V to 5.5V, FREQ applicable for the

MAX8521 only

VDD x

0.75

VMAXV = VREF x 0.67, VOS1 to VOS2 =

±4V,

VDD = 5V

-2

MAXV Threshold Accuracy

VMAXV = VREF x 0.33, VOS1 to VOS2 =

±2V,

VDD = 3V

-3

MAXV, MAXI_ Input Bias Current

IMAXV-BIAS,

IMAXI_-BIAS

VMAXV = VMAXI_ = 0.1V or 1.5V

-0.1

+0.1

µA

CTLI Gain

ACTLI

VCTLI = 0.5V to 2.5V (Note 6)

9.5

10.0

10.5

V/V

CTLI Input Resistance

RCTLI

Ω terminated at REF

0.5

1.0

2.0

Ω

Error-Amp Transconductance

100

160

µS

VITEC Accuracy

VOS1 to VCS =

±100mV

VOS1 = VDD /2

-10

+10

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