TL598

PULSE-WIDTH-MODULATION CONTROL CIRCUITS

SLVS053C – FEBRUARY 1988 – REVISED JULY 1999

4

POST OFFICE BOX 655303

(unless otherwise noted)

reference section (see Note 4)

PARAMETER

TEST CONDITIONS†

TL598C

TL598Q

UNIT

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

MIN

TYP‡

MAX

UNIT

Output voltage (REF)

IO =1mA

TA = 25°C

4.95

5

5.05

4.95

5

5.05

V

Output voltage (REF)

IO = 1 mA

TA = full range

4.9

5.1

4.9

5.1

V

Input regulation

VCC = 7 V to 40 V

TA = 25°C

2

25

2

22

mV

Output regulation

IO =1mAto10mA

TA = 25°C

1

15

1

15

mV

Output regulation

IO = 1 mA to 10 mA

TA = full range

50

80

mV

Output voltage change with

temperature

∆TA = MIN to MAX

2

10

2

10

mV/V

Short-circuit output current§

REF = 0 V

–10

–48

–10

–48

mA

† Full range is 0

°C to 70°C for the TL598C, and –40°C to 125°C for the TL598Q.

‡ All typical values except for parameter changes with temperature are at TA = 25°C.

§ Duration of the short circuit should not exceed one second.

NOTE 4: Pulse-testing techniques that maintain the junction temperature as close to the ambient temperature as possible must be used.

PARAMETER

TEST CONDITIONS†

TL598C, TL598Q

UNIT

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

UNIT

Frequency

100

kHz

Standard deviation of frequency¶

All values of VCC, CT, RT, TA constant

100

Hz/kHz

Frequency change with voltage

VCC = 7 V to 40 V,

TA = 25°C

1

10

Hz/kHz

Frequency change with temperature#

∆TA = full range

70

120

Hz/kHz

Frequency change with temperature#

∆TA = full range,

CT = 0.01 µF

50

80

Hz/kHz

† Full range is 0

°C to 70°C for the TL598C, and –40°C to 125°C for the TL598Q.

‡ All typical values except for parameter changes with temperature are at TA = 25°C.

¶ Standard deviation is a measure of the statistical distribution about the mean as derived from the formula:

# Effects of temperature on external RT and CT are not taken into account.

NOTE 4. Pulse-testing techniques that maintain the junction temperature as close to the ambient temperature as possible must be used.

error amplifier section (see Note 4)

PARAMETER

TEST CONDITIONS

TL598C, TL598Q

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP‡

MAX

UNIT

Input offset voltage

FEEDBACK = 2.5 V

2

10

mV

Input offset current

FEEDBACK = 2.5 V

25

250

nA

Input bias current

FEEDBACK = 2.5 V

0.2

1

µA

Common-mode input voltage range

VCC = 7 V to 40 V

0 to

VCC–2

V

Open-loop voltage amplification

∆VO (FEEDBACK) = 3 V, VO (FEEDBACK) = 0.5 V to 3.5 V

70

95

dB

Unity-gain bandwidth

800

kHz

Common-mode rejection ratio

VCC = 40 V,

∆VIC = 6.5 V,

TA = 25°C

65

80

dB

Output sink current (FEEDBACK)

FEEDBACK = 0.5 V

0.3

0.7

mA

Output source current (FEEDBACK)

FEEDBACK = 3.5 V

–2

mA

Phase margin at unity gain

FEEDBACK = 0.5 V to 3.5 V,

RL = 2 kΩ

65

°

Supply-voltage rejection ratio

FEEDBACK = 2.5 V,

∆VCC = 33 V,

RL = 2 kΩ

100

dB

‡ All typical values except for parameter changes with temperature are at TA = 25°C.

NOTE 4. Pulse-testing techniques that maintain the junction temperature as close to the ambient temperature as possible must be used.

s +

N

n

+1

xn–X

2

N–1