TL598

PULSE-WIDTH-MODULATION CONTROL CIRCUITS

SLVS053C – FEBRUARY 1988 – REVISED JULY 1999

6

POST OFFICE BOX 655303

(unless otherwise noted)

PARAMETER

TEST CONDITIONS

TL598C, TL598Q

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output-voltage rise time

CL = 1500 pF,

VC = 15 V,

VCC = 15 V,

60

150

ns

Output-voltage fall time

See Figure 2

35

75

ns

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

reference section (see Note 4)

PARAMETER

TEST CONDITIONS

TL598Y

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

Output voltage (REF)

IO = 1 mA

5

V

Input regulation

VCC = 7 V to 40 V

2

mV

Output regulation

IO = 1 mA to 10 mA

1

mV

Output-voltage change with temperature

2

mV/V

Short-circuit output current‡

REF = 0 V

–48

mA

† 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

TL598Y

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,

1

Hz/kHz

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

s +

N

n

+1

2

N–1

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

TL598Y

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input offset voltage

Feedback = 2.5 V

2

mV

Input offset current

Feedback = 2.5 V

25

nA

Input bias current

Feedback = 2.5 V

0.2

µA

Open-loop voltage amplification

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

95

dB

Unity-gain bandwidth

800

kHz

Common-mode rejection ratio

VCC = 40 V,

∆VIC = 6.5 V,

80

dB

Output sink current (FEEDBACK)

FEEDBACK = 0.5 V

0.7

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

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