KA34063ADTF_NL中文资料

?2002 Fairchild Semiconductor Corporation

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Rev. 1.0.1

Features

?Operation From 3.0 to 40V Input ?Short Circuit Current Limiting ?Low Stand-by Current

?

Output Switch Current of 1.5A Without External Transistors

?Output V oltage Adjustable

?Frequency of Operation From 100Hz to 100kHz

?Step-up, Step-Down or Inverting Switching Regulators

Description

The KA34063A is a monolithic regulator sub system intended for use as DC to DC converter. This device

contains a temperature compensated bandgap reference, a duty cycle control oscillator, a driver, and a high current output switch. It can be used for step down, step up or inverting switching regulators as well as for series pass regulators.

8-DIP

8-SOP

1

1

Internal Block Diagram

5

1

8

2

7

3

4

COMP

OSCILLATOR

RD

Q2

Q1

S

Q

R

1.25V REF VTG

COMPARATOR INVERTING INPUT

DRIVE

COLLECTOR

SWITCH

COLLECTOR

GND

I PK SENSE

TIMING

CAPACITOR

* V CC (6)

KA34063A

SMPS Controller

KA34063A

2

Absolute Maximum Ratings

Electrical Characteristics

(V CC = 5.0V, T A = 0°C to +70°C , unless otherwise specified)Note :

1. Output switch tests are performed under pulsed conditions to minimize power dissipation.

2. These parameters, although guaranteed, are not 100% tested in production.

Parameter Symbol Value Unit Supply Voltage

V CC 40V Comparator Input Voltage Range V I(COMP)-0.3 ~ +40

V Switch Collector Voltage V C(SW)40V Switch Emitter Voltage

V E(SW)40V Switch Collector To Emitter Voltage V CE(SW)40V Driver Collector Voltage V C(DR)40V Switch Current

I SW 1.5A Storage Temperature Range

T STG

-65 ~ +150

°C

Parameter Symbol

Conditions

Min.

Typ.Max.

Unit

OSCILLATOR Charging Current I CHG V CC = 5 to 40V, T A = 25°C 223142μA Discharging Current I DISCHG V CC = 5 to 40V, T A = 25°C 140

190260μA Oscillator Amplitude

V (OSC)T A = 25°C

0.5-V Discharge to Charge Current Ratio K V 7 = V CC, T A = 25°C 5.2 6.17.5-Current Limit Sense Voltage V SENSE(C.L)

I CHG = I DISCHG T A = 25°C

250300

350

mV

OUTPUT SWITCH

Saturation Voltage 1 (Note1)V CE(SAT)1I SW = 1.0A

V C (driver) = V C (SW)-0.95 1.3V Saturation Voltage 2 (Note1,2)V CE(SAT)2I SW = 1.0A,

V C (driver) = 50mA -0.450.7V DC Current Gain (Note1,2)G I(DC)I SW = 1.0A,

V CE = 5.0V, T A = 25°C 50180--Collector off State Current (Note1)I C(OFF)

V CE = 40V, T A = 25°C

-0.01

100

μA

COMPARATOR Threshold Voltage

V TH - 1.21 1.24 1.29V Threshold Voltage Line Regulation ?V TH V CC = 3 to 40V

- 2.0 5.0mV Input Bias Current I BIAS

V I = 0V

-50

400

nA

TOTAL DEVICE Supply Current

I CC

V CC = 5 to 40V, C T = 0.001uF V 7 = V CC, V 5>V TH pin2 = GND

- 2.7

4.0

mA

KA34063A

3

Typical Performance Characteristics

Temperature (°C)

Figure 1.Temperature Drift (V TH

)

KA34063A

Mechanical Dimensions

Package

Dimensions in millimeters

8-DIP

4

KA34063A Mechanical Dimensions (Continued)

Package

Dimensions in millimeters

8-SOP

5

KA34063A

9/10/02 0.0m 001Stock#DSxxxxxxxx

2002 Fairchild Semiconductor Corporation

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:

1.Life support devices or systems are devices or systems

which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be

reasonably expected to result in a significant injury of the user.

2. A critical component in any component of a life support

device or system whose failure to perform can be

reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

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DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY

LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

Ordering Information

Product Number Package Operating Temperature

KA34063A 8-DIP

0 ~ +70°C

KA34063AD

8-SOP