MC34717 查看數據表（PDF） - Freescale Semiconductor

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MC34717

5.0 A 1.0 MHz Fully Integrated Dual Switch-Mode Power Supply

Freescale Semiconductor 

ELECTRICAL CHARACTERISTICS

MAXIMUM RATINGS

Table 2. Maximum Ratings (continued)

All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or

permanent damage to the device.

Ratings

Symbol

Value

Unit

THERMAL RESISTANCE(7)

Thermal Resistance, Junction to Ambient, Single-Layer Board (1s)(8)

Thermal Resistance, Junction to Ambient, Four-Layer Board (2s2p)(9)

Thermal Resistance, Junction to Board(10)

RθJA

RqJMA

RqJB

93

32

13.6

°C/W

°C/W

°C/W

Notes

7. The PVIN, SW, and PGND pins comprise the main heat conduction paths.

8. Per SEMI G38-87 and JEDEC JESD51-2 with the single-layer board (JESD51-3) horizontal.

9. Per JEDEC JESD51-6 with the board (JESD51-7) horizontal. There are thermal vias connecting the package to the two planes in the

board. (per JESD51-5)

10. Thermal resistance between the device and the printed circuit board per JEDEC JESD51-8. Board temperature is measured on the top

surface of the board near the package.

34717

6

Analog Integrated Circuit Device Data

Freescale Semiconductor

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