UC2827-1, UC2827-2

UC3827-1, UC3827-2

www.ti.com

SLUS365D

– APRIL 1999 – REVISED APRIL 2011

ABSOLUTE MAXIMUM RATINGS

(1)

UC2827-1

UC2827-2

UNITS

UC3827-1

UC3827-2

Supply voltage, VCC

20

CEAO, CEA+, CEA-, CSAO, CSA+, CSA-, CT, DELAY, PUSH, PULL,

–0.3 to 5

RAMP, RT, SS, SYNC, VEA+, VEAO,

V

Input voltage range

V+ and BUCK

90

SRC

90-VCC

I/O continuous

±250

mA

BUCK driver

I/O peak

±1

A

I/O continuous

±200

mA

PUSH/PULL driver

I/O peak

±0.8

A

Storage temperature

–65 to 150

Junction temperature

–55 to 150

°C

Lead temperature (soldering, 10 sec)

300

(1)

Voltages are referenced to ground. Currents are positive into, negative out of the specified terminal. Consult Packaging section of

databook for thermal limitations and considerations of packages.

ELECTRICAL CHARACTERISTICS

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY

VCC UVLO, Turn-on

8.3

8.8

9.5

V

Hysteresis

0.9

1.2

1.5

V

Supply current start

1000

µA

Supply current run

32

45

mA

0.2

1

2

mA

VOLTAGE ERROR AMPLIFIER

IB

0.5

3

µA

VIO

10

mV

AVOL

80

95

dB

Gain bandwidth

1

4

MHz

Low-level output voltage

0.3

0.5

V

High-level output voltage

2.85

3

3.20

V

CURRENT SENSE AMPLIFIER

IB

–1

–5

µA

VIO

5

mV

AVOL

80

110

dB

Gain bandwidth

15

29

MHz

Low-level output voltage

0.25

0.5

V

High-level output voltage

3

3.3

V

CMRR

-0.3

2

V

(1)

Ensured by design. Not production tested.

Copyright

© 1999–2011, Texas Instruments Incorporated

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