TS34063A

1-8

2005/02 rev. A

TS34063AA

Dc to Dc Converter Controller

Supply Voltage Range 3 V to 40V

Output Driving Current 1.5A

Oscillator Frequency up to 100KHz

General Description

The TS34063A is a monolithic switching regulator and subsystem intended for use as DC to DC converter. It contains an
internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active peak current limit
circuit, drive and a high current output switch.
The TS34063A is specifically designed to be incorporated in step-up, step-down and voltage inverting converter
applications.
The TS34063A is offered in SOP-8 and DIP-8 package.

Features

Power forward control circuit

Operating voltage form 3V to 40V

Low standby current

Current limit adjustable

Output switch current up to 1.5A

Variable oscillator frequency up to 100KHz (max)

Output voltage adjustable

Pin Descriptions

Name Description

SC Switch

Collector

SE Switch

Emitter

CT Timing

Capacitor

Gnd Ground

Comp.

Comparator Inverting Input

Vcc Vcc

Collector

Ipk Ipk

Sense

Vdriver Driver

Applications

Charger

xD-ROM, xDSL product

DC to DC converter s

Ordering Information

Part No.

Operating Temp.

(Ambient)

Package

TS34063ACD

DIP-8

TS34063ACS

-20 ~ +85

SOP-8

Block Diagram

Pin assignment:
1. SC

2. SE

3. CT

4. Gnd

5. Comp.

6. Vcc

7. Ipk

8. Vdriver

TS34063A

2-8

2005/02 rev. A

Absolute Maximum Rating

Supply Voltage

40 V

Comparator Input Voltage Range

- 0.3 ~ 40

Switch Collector Output Voltage

C(SW)

40 V

Switch Emitter Voltage

E(SW)

40 V

Switch Collector to Emitter Voltage

CE(SW)

40 V

Driver Collector Voltage

Vc(driver)

Driver Collector Current (note 1)

Ic(driver)

100

Output Switching Current

1.5 A

Power Dissipation DIP-8
SOP-8

1.0
0.5

Operating Junction Temperature Range

-0 ~ +125

Storage Temperature Range

STG

-65 ~ +150

Note: Maximum package power dissipation limits must be observed

Electrical Characteristics

=5V, Ta =25

C; unless otherwise specified.)

Parameter Symbol

Test

Conditions

Min

Typ

Max

Unit

Oscillator (OSC)
Frequency F

OSC

= 1nF, Vpin5= 0V

KHz

Charge Current

CHARGE

= 5V ~ 40V

Discharge Current

DISCHARGE

= 5V ~ 40V

200

Discharge to Charge current ratio

DISCHARGE

/ I

CHARGE

Pin7 to Vcc

6.5

Current Limit Sense Voltage

IPK(SENSE)

DISCHARGE

= I

CHARGE

250

350

Output switch (note1)

Saturation Voltage

CE(SAT)

= 1A, pin1,8 connected)

1.0

1.3

Saturation Voltage

CE(SAT)

= 1A, Id=50mA

0.45

0.7

DC current gain

= 1A, Vce= 0.5V

Collector off-state current

C(OFF)

Vce= 40V

0.01

100

Comparator

Threshold Voltae

REF

1.225 1.25 1.275 V

Line regulation

RegLine

= 3V ~ 40V

Total device

Supply Current

= 5V ~ 40V, C

= 1nF,

pin7=Vcc, pin5>Vth,
pin2=Gnd, remaining pins
open

-- 1.6 3 mA

Note: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient

temperature as possible

2. If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (<=300mA)

and high driver currents (>=30mA), it may take up to 2uS for it to come out of saturation. This condition will
shorten the off time at frequencies >= 30KHz, and is magnified at high temperature. This condition does not
occur with a Darlington configuration, since the output switch cannot saturate. If a non-Darlington configuration
is used, the following output drive condition is recommended:

Forced Bata of output switch: Ic output / (Ic driver � 7mA*) >= 10

* The 100ohm resistor in the emitter of the driver divide requires about 7mA before the output switch conducts.

TS34063A

7-8

2005/02 rev. A

Design Formula Table

Test

Step Up

Step Down

Voltage Inverting

off

Vsat

Vcc

Vin

Vout

(min)

Vout

Vsat

Vcc

Vout

Vsat

Vcc

Vout

(

on+

off )

min

4.0 x 10

�5

4.0 x 10

�5

4.0 x 10

�5

Ipk(switch)

2Iout(max)

+ 1

toff

ton

2Iout(max)

+ 1

toff

ton

Rsc

)

(

switch

Ipk

)

(

switch

Ipk

)

(

switch

Ipk

L(min)

)

ton(

)

Ipk(switch

Vsat

)

Vin(

max

min

(max)

)

(

(min)

ton

switch

Ipk

Vout

Vsat

Vin

(max)

)

(

(min)

ton

switch

Ipk

Vsat

Vin

)

(

Vripple

ton

Iout

)

(

)

)(

(

Vripple

toff

ton

switch

Ipk

)

(

Vripple

ton

Iout

Terms and Definitions

Vsat = Saturation Voltage of the output switch.

= Forward Voltage drop of the rectifier.

The following power supply characteristics must be chosen:

Vin= Normal input voltage

Vout: Desied Output voltage, |Vout| =1.25 (1+R2 / R1)

Iout : Desired output current.

fmin : Minimum desired output switching frequency at the selected values for Vin

and Io.

Vripple(p-p): Desired peak-to-peak output ripple voltage. in practice, the calculated capacitor value will need to be
increased due to its equivalent series resistance and board layout. The ripple voltage should be kept to a low value
since it will directly affect the line and load regulation.

TS34063A

8-8

2005/02 rev. A

SOP-8 Mechanical Drawing

SOP-8 DIMENSION

MILLIMETERS INCHES

DIM

MIN MAX MIN MAX

A 4.80 5.00 0.189 0.196
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.054 0.068
D 0.35 0.49 0.014 0.019
F 0.40 1.25 0.016 0.049

1.27 (typ)

0.05 (typ)

K 0.10 0.25 0.004 0.009

M 0

P 5.80 6.20 0.229 0.244
R 0.25 0.50 0.010 0.019

DIP-8 Mechanical Drawing

DIP-8 DIMENSION

MILLIMETERS INCHES

DIM

MIN MAX MIN MAX

A 9.07 9.32 0.357 0.367
B 6.22 6.48 0.245 0.255
C 3.18 4.45 0.125 0.135
D 0.35 0.55 0.019 0.020

2.54 (typ)

0.10 (typ)

J 0.29 0.31 0.011 0.012

K 3.25 3.35 0.128 0.132

L 7.75 8.00 0.305 0.315

M - 10

- 10

Электронный компонент: TS34063ACD