MC34063A - Fairchild Semiconductor

June 2008

MC34063A/MC33063A • Rev. 1.0.3

MC34063A / MCC33063A— SMPS Controller

MC34063A / MC33063A

SMPS Controller

Features

 Operation from 3.0 to 40V Input

 Short Circuit Current Limiting

 Low Standby Current

 Output Switch Current of 1.5A Without External

Transistors

 Adjustable Output Voltage

 Frequency of Operation from 100Hz to 100KHz

 Step-up, Step Down, or Inverting Switching

Regulators

Description

The MC34063A/MC33063A is a monolithic regulator

subsystem intended for a DC to DC converter. The

device contains a temperature-compensated bandgap

reference, a duty cycle control oscillator, driver, and

high-current output switch. It can be used for step-

down, step-up, or inverting switching and series pass

regulators.

8-SOP

8-DI

P

Ordering Information

Part Number Operating

Temperature Range Eco Status Package

MC34063AP 0 ~ +70°C RoHS 8-DIP

MC34063AD 0 ~ +70°C RoHS 8-SOP

MC33063AP -40 ~ +85°C RoHS 8-DIP

MC33063AD -40 ~ +85°C RoHS 8-SOP

For Fairchild’s defini t i on of “green” Eco St atus, pleas e visit: http://www.fairchildsemi.com/company/green/rohs_green.html.

MC34063A/MC33063A • Rev. 1.0.3 2

MC34063A / MC33063A — SMPS Controller

Block Diagram

5

18

2

7

3

4

COMP

OSCILLATOR

RD

Q2

Q1

SQ

R

1.25V

REF

VTG COMPARATOR

INVERTING

INPUT

D

R

IVE

COLLECTOR SWITCH

COLLECTO

R

GND I

PK

SENSE

TIMING

CAPACITOR

*V

CC

(6)

Figure 1. Block Diagram

MC34063A/MC33063A • Rev. 1.0.3 3

MC34063A / MC33063A — SMPS Controller

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be

operable above the recommended operating conditions and stressing the parts to these levels is not recommended.

In addition, extended exposure to stresses above the recommended operating conditions may affect device

reliability. The absolute maximum ratings are stress ratings only.

Symbol Parameter Min. Max. Unit

VCC Supply Voltage 40 V

VI(COMP) Comparator Input Voltage Range -0.3 +40 V

VC(SW) Switch Collector Voltage 40 V

VE(SW) Switch Emitter Voltage 40 V

VCE(SW) Switch Collector to Emitter Voltage 40 V

VC(DR) Driver Collector Voltage 40 V

ISW Switch Current 1.5 A

TSTG Storage Temperature Range -65 +150 °C

SOP 0.8

PD Power Dissipation DIP 1 W

Electrical Characteristics

VCC = 5.0V, TA = 0°C to +70°C for MC34063, TA = -40°C to +85°C for MC33063, unless otherwi se specified.

Symbol Parameter Conditions Min. Typ. Max. Units

Oscillator

ICHG Charging Current VCC=5 to 40V, TA=25°C 22 31 42 µA

IDISCHG Discharging Current VCC=5 to 40V, TA=25°C 140 190 260 µA

V(OSC) Oscillator Amplitude TA=25°C 0.5 V

K Discharge-to-Charge Current Ratio V7=VCC, TA=25°C 5.2 6.1 7.5

VSENSE(CL) Current Limit Sense Voltage ICHG=IDISCHG, TA=25°C 250 300 350 mV

Output Switch

VCE(SAT)1 Saturation Voltage 1(1) I

SW=1.0A, VC(driver)=VC(SW) 0.95 1.30 V

VCE(SAT)2 Saturation Voltage 2(1) I

SW=1.0A, VC(driver)=50mA 0.45 0.70 V

GI(DC) DC Current Gain(1) ISW=1.0A,

VCE=5.0V, TA=25°C 50 180

IC(OFF) Collector Off-State Current(1) V

CE=40V, TA=25°C 0.01 100.00 µA

Comparator

VTH Threshold Voltage 1.21 1.24 1.29 V

ΔVTH Threshold Voltage Line Regulation VCC=3 to 40V 2 5 mV

IBIAS Input Bias Current VI=0V 50 400 nA

Total Device

MC34063 4

ICC Supply Current MC33063 VCC=5 to 40V, CT=0.001µF,

V7=VCC, V5>VTH, pin 2=GND 5

mA

Note:

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

MC34063A/MC33063A • Rev. 1.0.3 4

MC34063A / MC33063A — SMPS Controller

Typical Performance Characteristics

Figure 2. Temperature Drift (VTH) Figure 3. Temperature Drift (IOC)

MC34063A/MC33063A • Rev. 1.0.3 5

MC34063A / MC33063A — SMPS Controller

Physical Dimensions

C

7° TYP

.430 MAX

[10.92]

B

A.400

.373 [10.15

9.46 ]

.250±.005 [6.35±0.13]

.036 [0.9 TYP]

.070

.045 [1.78

1.14]

.100

[2.54]

.300

[7.62]

.060 MAX

[1.52]

.310±.010 [7.87±0.25]

.130 ±.005 [3.3±0.13]

.210 MAX

[5.33]

.140

.125 [3.55

3.17]

.015 MIN

[0.38]

.021

.015 [0.53

0.37]

.010+.005

-.000 [0.254+0.127

-0.000 ]

PIN #1

(.032) [R0.813]

(.092) [Ø2.337]

TOP VIEW

OPTION 1 TOP VI EW

OPTION 2

.001[.025] C

N08EREVG

C. DOES NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

DAMBAR PROTRUSIONS SHALL NOT EXCEED

D. DOES NOT INCLUDE DAMBAR PROTRUSIONS.

B. CON T RO L ING DIMENSIONS ARE IN INC HES

A. CONFOR MS TO JE DEC REGISTRA T ION M S-001,

MOLD FLASH O R PROTRUSIONS SHALL N O T EXCEED

VARIATIONS BA

E. DIMENSIONING AND TOLERANCING

NOTES:

REFE RENCE DIMENSIONS ARE IN MILLIMETERS

.010 INCHES OR 0.25 M M.

.010 INCHES OR 0.25MM.

PER ASME Y14.5 M- 1994.

Figure 4. 8-Lead PDIP, JEDEC MS-001

Pack age drawings are provi ded as a servic e to customers considering Fairc h i l d components. Drawi ngs may change in any manner

without notice. P l ease note the revi sion and/or date on t he drawing and contac t a Fairchild S emic onductor representative to v er ify

or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically

the warranty therein, which covers Fairchild products.

Always visit Fairchild Semiconductor’ s online packaging area for the most recent package drawings:

http://www.fairchildsemi.com/packaging/.

MC34063A/MC33063A • Rev. 1.0.3 6

MC34063A / MC33063A — SMPS Controller

Physical Dimensions

8°

0°

SEE DETAIL A

NOTES: UNLESS OTHERWISE SPECIFIED

A) THIS PACKAGE CONFORMS TO JEDEC

MS-012, VARIATION AA, ISSUE C,

B) ALL DIMENSIONS ARE IN MILLIMETERS.

C) DIMENSIONS DO NOT INCLUDE MOLD

FLASH OR BURRS.

D) LANDPATTERN STANDARD: SOIC127P600X175-8M.

E) DRAWING FI LENAME : M08AREV1 3

LAND PATTERN RECOMMENDATION

SEATING PLANE

0.10 C

C

GAGE PLANE

x 45°

DETAIL A

SCALE: 2:1

PIN ONE

INDICATOR 4

8

1

C

MBA0.25

B

5

A

5.60

0.65

1.75

1.27

6.20

5.80

3.81

4.00

3.80

5.00

4.80

(0.33) 1.27

0.51

0.33

0.25

0.10

1.75 MAX 0.25

0.19

0.36

0.50

0.25

R0.10

0.90

0.406 (1.04)

OPTION A - BEVEL EDGE

OPTION B - NO BEVEL EDGE

Figure 5. 8-Lead, SOIC, JEDEC MS-012, .150 inch Narrow Body

Pack age drawings are provided as a service to customers consideri ng Fai rchild components . Drawings may c hange i n any manner

without notice. P l ease note the revi sion and/or date on t he drawing and contac t a Fairchild S emiconductor represent ative to v er ify

or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically

the warranty therein, which covers Fairchild products.

Always visit Fairchild Semiconductor’ s online packaging area for the most recent package drawings:

http://www.fairchildsemi.com/packaging/.

MC34063A/MC33063A • Rev. 1.0.3 7

MC34063A / MC33063A — SMPS Controller