LT3504 Просмотр технического описания (PDF) - Linear Technology

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LT3504

Quad 40V/1A Step-Down Switching Regulator with 100% Duty Cycle Operation

Linear Technology 

Applications Information

1

LT3504

0.1

0.01

SINGLE PULSE

10–3

10–5 10–4 10–3 0.01

D = 0.5

D = 0.2

D = 0.1

D = 0.05

D = 0.02

D = 0.01

0.1 1 10

t1, SQUARE WAVE PULSE DURATION (s)

PDM

t1

t2

ZθJC(t) = 0.7°C/W MAX

DUTY FACTOR = D = t1/t2

TJM – TC = PDM • ZθJC(t)

3504 F11

Figure 11. FQB34N20L Transient Thermal Response

SKY

2V/DIV

VSUPPLY

2V/DIV

VIN

2V/DIV

20ms/DIV

3504 F12

Figure 12. Figure 9’s Start-Up Behavior

VIN

50V/DIV

VOUT1

1V/DIV

VOUT2

1V/DIV

VOUT3

1V/DIV

VOUT4

1V/DIV

100ms/DIV

3504 F13

Figure 13. Figure 9’s Dropout Performance

For more information www.linear.com/LT3504

3504fa

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