V-Tec C5-AT25/D4 Manual do Utilizador descarregar pdf (Página 2)

MAX8520/MAX8521

Smallest TEC Power Drivers for

Optical Modules

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

to GND..............................................................-0.3V to +6V

SHDN, MAXV, MAXIP, MAXIN,

CTLI to GND .........................................................-0.3V to +6V

COMP, FREQ, OS1, OS2, CS, REF,

ITEC to GND...........................................-0.3V to (V

+ 0.3V)

1, PV

2 to GND...............................-0.3V to (V

+ 0.3V)

1, PV

2 to V

...........................................-0.3V to +0.3V

PGND1, PGND2 to GND .......................................-0.3V to +0.3V

COMP, REF, ITEC Short to GND ...................................Indefinite

LX Current (Note 1) ........................................±2.25A LX Current

Continuous Power Dissipation (T

= +70°C)

20-Pin 5mm x 5mm x 0.9mm QFN (derate 20.8mW/°C

above +70°C) (Note 2)...................................................1.67W

3mm x 3mm UCSP (derate 22mW/°C

above +70°C).................................................................1.75W

Maximum Junction Temperature .....................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering 10s) ..................................+300°C

ELECTRICAL CHARACTERISTICS

= PV

1 = PV

2 = SHDN = 5V, 1MHz mode (Note 3). PGND1 = PGND2 = GND, CTLI = MAXV = MAXIP = MAXIN = REF,

= 0°C to +85°C, unless otherwise noted. Typical values at T

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Supply Range V

3.0 5.5 V

Maximum TEC Current

±1.5

Reference Voltage V

REF

= 3V to 5.5V, I

REF

= 150µA

1.485

1.5

1.515

Reference Load Regulation ∆V

REF

= 3V to 5V, I

REF

= 10µA to 1mA 1.2 5.0 mV

MAXI_

= V

REF

140 150

160

= 5V

MAXI_

= V

REF

/3 40 50 60

MAXI_

= V

REF

143 150

155

MAXIP/MAXIN Threshold

Accuracy

= 3V

MAXI_

= V

REF

/3 45 50 55

= 5V, I = 0.2A

0.09 0.14

NFET On-Resistance

(

ON-N

)

= 3V, I = 0.2A

0.11 0.16

Ω

= 5V, I = 0.2A

0.14 0.23

PFET On-Resistance

(

ON-P

)

= 3V, I = 0.2A

0.17 0.30

Ω

= V

= 5V, T

= +25°C

0.03

NFET Leakage I

LEAK(N)

= V

= 5V, T

= +85°C 0.3

µA

= 0, T

= +25°C

0.03

PFET Leakage I

LEAK(P)

= 0, T

= +85°C 0.3

µA

500kHz mode 11 14

COMP

= V

REF

1.500V, V

= 5V

1MHz mode 16 21

500kHz mode 8 11

No-Load Supply Current

DD(NO

LOAD)

COMP

= V

REF

1.500V, V

= 3.3V

1MHz mode 11 14

Shutdown Supply Current I

DD-SD

SHDN = GND, V

= 5V (Note 4) 2 3 mA

Thermal Shutdown

SHUTDOWN

Hysteresis = 15°C

+165

°C

rising

2.50 2.65 2.80

UVLO Threshold V

UVLO

falling

2.40 2.55 2.70

Note 1: LX has internal clamp diodes to PGND and PVDD. Applications that forward bias these diodes should take care not to exceed

the IC’s package power dissipation limits.

Note 2: Solder underside metal slug to PC board ground plane.

1 2 3 4 5 6 7 ... 18 19

MAX8520/MAX8521 1
Optical Modules 1

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