MC34063ADR 参数 Datasheet PDF下载

MC33063A, MC34063A

1.5 A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS

SLLS636D – DECEMBER 2004 – REVISED MARCH 2005

functional block diagram

Drive

Collector

8

1

Switch

Collector

S Q

R

100

Ω

Ipk

Sense

7

Q2

Q1

2

Switch

Emitter

Ipk

Oscillator

CT

6

VCC

3

Timing

Capacitor

+

_

Comparator

Inverting

Input

5

1.25-V

Reference

Regulator

4

GND

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

†

Supply voltage, V

CC

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 V

Comparator Inverting Input voltage range, V

IR

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 40 V

Switch Collector voltage, V

C(switch)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V

Switch Emitter voltage (V

PIN1

= 40 V), V

E(switch)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V

Switch Collector to Switch Emitter voltage, V

CE(switch)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V

Driver Collector voltage, V

C(driver)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V

Driver Collector current, I

C(driver)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mA

Switch current, I

SW

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A

Package thermal impedance,

θ

JA

(see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W

DRJ package . . . . . . . . . . . . . . . . . . . . . . . TBD°C/W

P package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85°C/W

Operating virtual junction temperature, T

J

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C

Storage temperature range, T

stg

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. Maximum power dissipation is a function of TJ(max),

θ

JA, and TA. The maximum allowable power dissipation at any allowable

ambient temperature is PD = (TJ(max) − TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.

2. The package thermal impedance is calculated in accordance with JESD 51-7.

2

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