UC3573 datasheet(2/5 Pages) TI

部品番号	UC3573

部品情報	Buck Pulse Width Modulator Stepdown Voltage Regulator

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2

UC1573

UC2573

UC3573

DIL-8, SOIC-8 (TOP VIEW)

J or N, D Packages

ABSOLUTE MAXIMUM RATINGS

VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V

EAINV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.6V to VCC

IEAOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA

RAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 4V

CS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to VCC

IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.7A to 0.7A

I3VREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –15mA

Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C

Junction Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C

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

Currents are positive into, negative out of the specified termi-

nal. Consult Packaging Section of Databook for thermal limita-

tions and considerations of packages.

CONNECTION DIAGRAMS

ELECTRICAL CHARACTERISTICS: Unless otherwise specified, these parameters apply for TA = –55°C to +125°C for

the UC1573, –40°C to +85°C for the UC2573, and 0°C to +70°C for the UC3573, VCC = 5V, CT = 680pF, TA = TJ.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Reference Section

3VREF

2.94

3

3.06

V

Line Regulation

VCC = 4.75 to 30V

1

10

mV

Load Regulation

I3VREF = 0 to –5mA

1

10

mV

Oscillator Section

Frequency

VCC = 5V, 30V

85

100

115

kHz

Error Amp Section

EAINV

EAOUT = 2V

1.45

1.5

1.55

V

IEAINV

EAOUT = 2V

–0.2

–1

µA

AVOL

EAOUT = 0.5V to 3V

65

90

dB

EAOUT High

EAINV = 1.4V

3.6

4

4.4

V

EAOUT Low

EAINV = 1.6V

0.1

0.2

V

IEAOUT

EAINV = 1.4V, EAOUT = 2V

–350

–500

µA

EAINV = 1.6V, EAOUT = 2V

7

20

mA

Unity Gain Bandwidth

TJ = 25°C, F = 10kHz

0.6

1

MHz

Current Sense Comparator Section

Threshold (referred to VCC)

–0.39

–0.43

–0.47

V

Input Bias Current

CS = VCC

150

800

nA

CS Propagation Delay

400

ns

Gate Drive Output Section

OUT High Saturation

IOUT = 0

0

0.3

V

IOUT = –10mA

0.7

1.5

V

IOUT = –100mA

1.5

2.5

V

OUT Low Saturation

IOUT = 10mA

0.1

0.4

V

IOUT = 100mA

1.5

2.2

V

Rise Time

TJ = 25°C, CLOAD = 1nF + 3.3 Ohms

30

80

ns

Fall Time

TJ = 25°C, CLOAD = 1nF + 3.3 Ohms

30

80

ns

Pulse Width Modulator Section

Maximum Duty Cycle

EAINV = 1.4V

92

96

%

Minimum Duty Cycle

EAINV = 1.6V

0

%

Modulator Gain

EAOUT = 1.5V to 2.5V

25

35

45

%/V

Undervoltage Lockout Section

Start Threshold

3.5

4.2

4.5

V

Hysteresis

100

200

300

mV

同様の部品番号 - UC3573

メーカー	部品番号	データシート	部品情報
Texas Instruments	UC3573D	1Mb / 12P	[Old version datasheet] Buck Pulse Width Modulator Stepdown Voltage Refgulator
	UC3573DG4	1Mb / 12P	[Old version datasheet] Buck Pulse Width Modulator Stepdown Voltage Refgulator
	UC3573DTR	1Mb / 12P	[Old version datasheet] Buck Pulse Width Modulator Stepdown Voltage Refgulator
	UC3573DTRG4	1Mb / 12P	[Old version datasheet] Buck Pulse Width Modulator Stepdown Voltage Refgulator
	UC3573N	1Mb / 12P	[Old version datasheet] Buck Pulse Width Modulator Stepdown Voltage Refgulator

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同様の説明 - UC3573

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