FDMF5821 datasheet(9/26 Pages) ONSEMI

Part #	FDMF5821

Description	Smart Power Stage (SPS) Module with Integrated Temperature Monitor

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Manufacturer	ONSEMI [ON Semiconductor]

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FDMF5821 • Rev. 1.0

8

Typical Performance Characteristics

Test Conditions: VIN=12 V, VCC=PVCC=5 V, VOUT=1.8 V, LOUT=250 nH, TA=25°C and natural convection cooling,

unless otherwise noted.

Figure 10.

Power Loss vs. Output Inductor

Figure 11.

Driver Supply Current vs. Switching

Frequency

Figure 12.

Driver Supply Current vs. Driver Supply

Voltage

Figure 13.

Driver Supply Current vs. Output Current

Figure 14.

UVLO Threshold vs. Temperature

Figure 15.

PWM Threshold vs. Driver Supply Voltage

0.97

0.98

0.99

1.00

1.01

200

250

300

350

400

450

500

Output Inductor, LOUT [nH]

VIN = 12V, PVCC & VVCC = 5V, FSW = 500kHz, VOUT = 1.8V, IOUT = 30A

0.01

0.02

0.03

0.04

0.05

0.06

0.07

200

300

400

500

600

700

800

900

1000

1100

Module Switching Frequency, FSW [kHz]

VIN = 12V, PVCC & VCC = 5V, VOUT = 1.8V, IOUT = 0A

0.02

0.022

0.024

0.026

0.028

0.03

0.032

0.034

0.036

4.0

4.5

5.0

5.5

6.0

Driver Supply Voltage, PVCC & VVCC [V]

VIN = 12V, VOUT = 1.8V, FSW = 500kHz, IOUT = 0A

0.88

0.90

0.92

0.94

0.96

0.98

1.00

1.02

1.04

1.06

0

5

10

15

20

25

30

35

40

45

50

55

60

Module Output Current, IOUT [A]

FSW = 300kHz

FSW = 1000kHz

VIN = 12V, PVCC & VVCC = 5V, VOUT = 1.8V

3.3

3.4

3.5

3.6

3.7

3.8

3.9

4.0

-55

0

25

55

100

125

Driver IC Junction Temperature, T J [oC]

UVLOUP

UVLODN

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.50

4.75

5.00

5.25

5.50

Driver Supply Voltage, VCC [V]

VIH_PWM

TA = 25°C

VTRI_HI

VTRI_LO

VIL_PWM

VHIZ_PWM

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