ISL8501 Просмотр технического описания (PDF) - Intersil

Номер в каталоге

Компоненты Описание

Список матч

ISL8501

Triple Output Controller with 1A Standard Buck PWM and Dual LDOs

Intersil 

ISL8501

Typical Performance Curves Circuit of Figure 2. VIN = 12V, VIN_LDO1 = VIN_LDO2 = VOUT1 = 3.3V, IOUT1 = 1A, VLDO1 = 1.2V,

ILDO1 = 450mA, VLDO2 = 1.8V, ILDO2 = 450mA, TA = -40°C to +85°C unless otherwise noted.

Typical values are at TA = +25°C. (Continued)

5.1

6

5.0

5

4.9

4

4.8

50mA LOAD

4.7

3

4.6

2

NO LOAD

4.5

1

4.4

0

50

100

150

200

I VCC (mA)

FIGURE 15. VCC LOAD REGULATION

0

0

5

10

15

20

25

30

VIN (V)

FIGURE 16. VCC REGULATION WITH VIN

1.30

1.28

1.26

7VIN

1.24

1.22

12VIN

1.20

1.18

1.16

1.14

1.12

25VIN

1.10

0

100 200 300 400 500 600 700

OUTPUT LOAD (mA)

FIGURE 17. LDO1 vs LOAD, 500kHz, VIN_LDO1 = 3.3V

1.90

1.88

1.86

1.84

1.82

1.80

1.78

1.76

1.74

1.72

1.70

0

7VIN

12VIN

25VIN

100 200 300 400 500 600 700

OUTPUT LOAD (mA)

FIGURE 18. LDO2 vs LOAD, 500kHz VIN_LDO2 = 3.3V

PHASE 10V/DIV

VOUT1 RIPPLE

20mV/DIV

IL 0.2A/DIV

LDO1 RIPPLE

20mV/DIV

LDO2 RIPPLE

20mV/DIV

FIGURE 19. STEADY STATE OPERATION AT NO LOAD, 5µs/DIV

PHASE 10V/DIV

VOUT1 RIPPLE

20mV/DIV

IL 1A/DIV

LDO1 RIPPLE

20mV/DIV

LDO2 RIPPLE

20mV/DIV

FIGURE 20. STEADY STATE OPERATION AT FULL LOAD,

1µs/DIV

10

FN6500.1

July 12, 2007

Share Link: