www.ti.com

GND

REF

Reference

Regulator

C1

Pulse-Steering

Flip-Flop

C1

1D

FEEDBACK

DTC

CT

RT

PWM

Comparator

Error Amplifier 2

1

+

-

Error Amplifier 1

≈0.1 V

DTC

Comparator

Oscillator

OUTPUT CTRL

(see Function Table)

0.7 mA

E1

C2

E2

2

+

-

Undervoltage

Lockout

Control

IN+

IN-

IN+

IN-

6

5

1

2

16

15

3

14

7

12

10

11

9

8

13

4

TL594

PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS052G – APRIL 1988 – REVISED JANUARY 2007

ORDERABLE PART NUMBER

TOP-SIDE MARKING

PDIP – N

Tube of 25

TL594CN

TL594CN

Tube of 40

TL594CD

SOIC – D

TL594C

Reel of 2500

TL594CDR

0

°C to 70°C

SOP – NS

Reel of 2000

TL594CNSR

TL594

Tube of 90

TL594CPW

TSSOP – PW

T594

Reel of 2000

TL594CPWR

PDIP – N

Tube of 25

TL594IN

TL594IN

Tube of 40

TL594ID

SOIC – D

TL594I

Reel of 2500

TL594IDR

–40

°C to 85°C

SOP – NS

Reel of 2000

TL594INSR

TL594I

Tube of 90

TL594IPW

TSSOP – PW

Z594

Reel of 2000

TL594IPWR

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2)

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

FUNCTION TABLE

INPUT

OUTPUT FUNCTION

OUTPUT CTRL

Single-ended or parallel output

Normal push-pull operation

FUNCTIONAL BLOCK DIAGRAM

2

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