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MAX8521 Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX8521 Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 19 page 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. VDD 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 (VDD + 0.3V) PVDD1, PVDD2 to GND...............................-0.3V to (VDD + 0.3V) PVDD1, PVDD2 to VDD ...........................................-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 (TA = +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 (VDD = PVDD1 = PVDD2 = SHDN = 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 Input Supply Range VDD 3.0 5.5 V Maximum TEC Current ±1.5 A Reference Voltage VREF VDD = 3V to 5.5V, IREF = 150µA 1.485 1.5 1.515 V Reference Load Regulation ∆VREF VDD = 3V to 5V, IREF = 10µA to 1mA 1.2 5.0 mV VMAXI_ = VREF 140 150 160 VDD = 5V VMAXI_ = VREF/3 40 50 60 VMAXI_ = VREF 143 150 155 MAXIP/MAXIN Threshold Accuracy VDD = 3V VMAXI_ = VREF/3 45 50 55 mV VDD = 5V, I = 0.2A 0.09 0.14 NFET On-Resistance RDS(ON-N) VDD = 3V, I = 0.2A 0.11 0.16 Ω VDD = 5V, I = 0.2A 0.14 0.23 PFET On-Resistance RDS(ON-P) VDD = 3V, I = 0.2A 0.17 0.30 Ω VLX = VDD = 5V, TA = +25 °C 0.03 4 NFET Leakage ILEAK(N) VLX = VDD = 5V, TA = +85 °C 0.3 µA VLX = 0, TA = +25 °C 0.03 4 PFET Leakage ILEAK(P) VLX = 0, TA = +85 °C 0.3 µA 500kHz mode 11 14 VCOMP = VREF = 1.500V, VDD = 5V 1MHz mode 16 21 500kHz mode 8 11 No-Load Supply Current IDD(NO LOAD) VCOMP = VREF = 1.500V, VDD = 3.3V 1MHz mode 11 14 mA Shutdown Supply Current IDD-SD SHDN = GND, VDD = 5V (Note 4) 2 3 mA Thermal Shutdown TSHUTDOWN Hysteresis = 15 °C +165 °C VDD rising 2.50 2.65 2.80 UVLO Threshold VUVLO VDD falling 2.40 2.55 2.70 V 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. |
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