UCC28C40, UCC28C41, UCC28C42, UCC28C43, UCC28C44, UCC28C45

UCC38C40, UCC38C41, UCC38C42, UCC38C43, UCC38C44, UCC38C45

SLUS458E -- AUGUST 2001 -- REVISED OCTOBER 2010

3

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PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Reference Section

Output voltage, initial accuracy

4.9

5.0

5.1

V

Line regulation

0.2

20

mV

Load regulation

1mA to 20mA

3

25

mV

Temperature stability

SeeNote2

0.2

0.4

mV/°C

Total output variation

SeeNote2

4.82

5.18

V

Output noise voltage

10 Hz to 10 kHz,

SeeNote2

50

μV

Long term stability

1000 hours,

SeeNote2

5

25

mV

Output short circuit

–30

–45

–55

mA

Oscillator Section

Initial accuracy

SeeNote3

50.5

53

55

kHz

Voltage stability

0.2%

1.0%

Temperature stability

1%

2.5%

Amplitude

RT/CT Pin peak-to-peak

1.9

V

Discharge current

RT/CT = 2 V,

See Note 4

7.7

8.4

9.0

mA

Discharge current

RT/CT = 2 V,

See Note 4

7.2

8.4

9.5

mA

Error Amplifier Section

Feedback input voltage, initial accuracy

2.475

2.500

2.525

V

Feedback input voltage, total variation

2.45

2.50

2.55

V

Input bias current

–0.1

–2.0

μA

65

90

dB

Unity gain bandwidth

SeeNote2

1.0

1.5

MHz

Power supply rejection ratio (PSRR)

60

dB

Output sink current

2

14

mA

Output source current

–0.5

–1.0

mA

High-level output voltage (VOH)

5

6.8

V

Low-level output voltage (VOL)

0.1

1.1

V

Current Sense Section

Gain

SeeNote5,6

2.85

3.00

3.15

V/V

Maximum input signal

0.9

1.0

1.1

V

Power supply rejection ratio (PSRR)

VDD = 12 V to 18 V, See Note 2, 5

70

dB

Input bias current

–0.1

–2.0

μA

CS to output delay

35

70

ns

COMP to CS offset

1.15

V

NOTE: 2. Ensured by design. Not production tested.

NOTE: 3. Output frequencies of the UCC38C41, UCC38C44 and the UCC38C45 are half the oscillator frequency.

NOTE: 6. Gain is defined as ACS =

ΔVCOM

ΔVCS

,0V ≼ VCS ≼ 900mV