PDF《19-6844; Rev 1; 2/14》

165 ?C Thermal Shutdown Hysteresis

10 ?C ??

5 china.maximintegrated.com 典型工作特性 (VIN = VEN/UVLO = 24V, VPGND = VSGND = 0V, CVIN =

2 x 2.2?F, CVCC = 2.2?F, CBST = 0.1?F, CSS = 12,000pF, RT = MODE = open, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.)

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3500 EFFICIENCY (%) LOAD CURRENT (mA) 5V OUTPUT, PWM MODE, FIGURE

3 CIRCUIT, EFFICIENCY vs. LOAD CURRENT VIN = 48V VIN = 36V VIN = 24V VIN = 12V MODE = SGND toc01

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3500 EFFICIENCY (%) LOAD CURRENT (mA) 3.3V OUTPUT, PWM MODE, FIGURE

4 CIRCUIT, EFFICIENCY vs. LOAD CURRENT VIN = 48V VIN = 36V VIN = 24V VIN = 12V MODE = SGND toc02

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100 1000 EFFICIENCY (%) LOAD CURRENT (mA) 5V OUTPUT, PFM MODE, FIGURE

3 CIRCUIT, EFFICIENCY vs. LOAD CURRENT VIN = 48V VIN = 36V VIN = 24V VIN = 12V MODE = OPEN

3500 toc03

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100 1000 EFFICIENCY (%) LOAD CURRENT (mA) 3.3V OUTPUT, DCM MODE, FIGURE

4 CIRCUIT, EFFICIENCY vs. LOAD CURRENT VIN = 48V VIN = 36V VIN = 24V VIN = 12V MODE = VCC

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1000 EFFICIENCY (%) LOAD CURRENT (mA) 3.3V OUTPUT, PFM MODE, FIGURE

4 CIRCUIT, EFFICIENCY vs. LOAD CURRENT VIN = 48V VIN = 36V VIN = 24V VIN = 12V MODE = OPEN

3500 toc04 4.98 4.99 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08

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3000 3500 OUTPUT VOLTAGE (V) LOAD CURRENT (mA) 5V OUTPUT, PWM MODE, FIGURE

3 CIRCUIT, LOAD AND LINE REGULATION VIN = 48V VIN = 36V VIN = 24V VIN = 12V toc07 MODE = SGND

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100 1000 EFFICIENCY (%) LOAD CURRENT (mA) 5V OUTPUT, DCM MODE, FIGURE

3 CIRCUIT, EFFICIENCY vs. LOAD CURRENT VIN = 48V VIN = 36V VIN = 24V VIN = 12V MODE = VCC

3500 ??

6 china.maximintegrated.com 典型工作特性(续) (VIN = VEN/UVLO = 24V, VPGND = VSGND = 0V, CVIN =

2 x 2.2?F, CVCC = 2.2?F, CBST = 0.1?F, CSS = 12,000pF, RT = MODE = open, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.) 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 3.35 3.36

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3000 3500 OUTPUT VOLTAGE (V) LOAD CURRENT (mA) 3.3V OUTPUT, PWM MODE, FIGURE

4 CIRCUIT, LOAD AND LINE REGULATION VIN = 36V VIN = 48V VIN = 24V VIN = 12V toc08 MODE = SGND 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5

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3000 3500 OUTPUT VOLTAGE (V) LOAD CURRENT (mA) 5V OUTPUT, PFM MODE, FIGURE

3 CIRCUIT, LOAD AND LINE REGULATION VIN = 36V VIN = 48V VIN = 24V VIN = 12V toc09 MODE = OPEN 3.0 3.1 3.2 3.3 3.4 3.5 3.6

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3000 3500 OUTPUT VOLTAGE (V) LOAD CURRENT (mA) 3.3V OUTPUT, PFM MODE, FIGURE

4 CIRCUIT, LOAD AND LINE REGULATION VIN = 36V VIN = 48V VIN = 12V VIN = 24V toc10 MODE = OPEN 2A/div 1ms/div VEN/UVLO 2V/div SOFT-START/SHUTDOWN FROM EN/UVLO, 3.3V OUTPUT, 3.5A LOAD CURRENT, FIGURE

4 CIRCUIT toc13 VOUT 2V/div VRESET 5V/div IOUT

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100 SWITCHING FREQUENCY (kHz) RRT (kΩ) SWITCHING FREQUENCY vs. RT RESISTANCE toc11 2ms/div VEN/UVLO 2V/div SOFT-START/SHUTDOWN FROM EN/UVLO, 5V OUTPUT, PFM MODE, 5mA LOAD CURRENT, FIGURE

3 CIRCUIT toc14 VOUT 1V/div VRESET 5V/div MODE = OPEN 2A/div 1ms/div VEN/UVLO 2V/div SOFT-START/SHUTDOWN FROM EN/UVLO, 5V OUTPUT, 3.5A LOAD CURRENT, FIGURE