UC2578DP datasheet(2/11 Pages) TI1

부품명	UC2578DP

상세설명	Buck Pulse Width Modulator Stepdown Voltage Regulator

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UC2578

UC3578

ELECTRICAL CHARACTERISTICS: Unless otherwise specified VCC = 14V, VGG = 14V, TA =TJ.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Oscillator Section

Frequency

VCC = 14V to 72V, EAINV = 1.9V, TJ = 25°C

100

110

120

kHz

VCC = 11V to 14V, Over Temperature

90

120

kHz

Error Amplifier Section

EAINV

EAOUT = EAINV

1.97

2

2.03

V

IEAINV

EAOUT = EAINV

100

300

nA

EAVOL

EAOUT/EAINV, 25°C

70

80

dB

EAOUT High

EAINV

≤ 1.9V, IEAOUT = –100µA

5.5

6.2

V

EAOUT Low

EAINV

≥ 2.1V, IEAOUT = 100µA

0.8

1.1

V

Unity Gain Bandwidth

TJ = 25°C, F = 100kHz

0.85

1

MHz

PSRR, EAOUT

EAOUT = EAINV, VCC = 14V

80

90

dB

Current Sense Comparator Section

Threshold (Referred to VCC)

0.4

0.5

0.6

V

Input Bias Current

CS = VCC – 0.4V

0.2

1

µA

Propagation Delay

VOVERDRIVE = 250mV

0.7

1.2

µs

Blanking Time

VOVERDRIVE = 250mV

75

200

300

ns

Gate Drive Output Section

VOH

IOUT = –200mA

9.5

11

V

VOL

IOUT = 20mA

0.2

0.36

V

IOUT = 200mA

1.5

2

V

Rise Time

TJ = 25°C, CLOAD = 1nF

40

70

ns

Fall Time

TJ = 25°C, CLOAD = 1nF

40

70

ns

Pulse Width Modulator Section

Maximum Duty Cycle

EAINV

≤ 1.9V

85

90

%

Minimum Duty Cycle

EAINV

≥ 2.1V

0

%

Modulator Gain

EAOUT = 2.5V to 3.5V

30

%/V

Undervoltage Lockout Section

Start Threshold

OUT – SRC, EAINV

≤ 1.9V, SRC = 0V

10

11

12

V

UVLO Hysteresis

1.5

2

2.5

V

CONNECTION DIAGRAM

Note: The four GND pins are internally connected.

DIL-16, SOIC-16 (Top View)

N or DP Packages

VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +72V

EAINV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to +10V

EAOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to +10V

SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to +10V

DIODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to VCC

VGG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to VCC +14V

CS . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC – 5V to VCC +0.6V

IOUT Pulsed . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.8A to +0.6A

SRC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.6V to VCC

Storage Temperature . . . . . . . . . . . . . . . . . . .

−65°C to +150°C

Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C

Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C

Currents are positive into, negative out of the specified terminal.

Consult Packaging Section of Databook for thermal limitations

and considerations of packages.

ABSOLUTE MAXIMUM RATINGS

Not Recommended for New Designs

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