LM2574-3.3BN datasheet(4/8 Pages) MICREL

номер детали	LM2574-3.3BN

подробное описание детали	52kHz Simple 0.5A Buck Regulator

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производитель	MICREL [Micrel Semiconductor]

домашняя страница	http://www.micrel.com

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4 / 8 page

LM2574

Micrel, Inc.

M9999-072805

4

July 2005

Electrical Characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Units

Device Parameters, Adjustable Regulator

IB

Feedback Bias Current

VOUT = 5V

50

100

nA

500

nA

Device Parameters, Fixed and Adjustable Regulators

fo

Oscillator Frequency

Note 8

47

52

58

kHz

42

63

kHz

VSAT

Saturation Voltage

IOUT = 0.5A(4)

0.8

1.2

V

1.4

V

DC

Max Duty Cycle (ON)

Note 5

93

98

%

ICL

Current Limit

Peak Current, tON ≤ 3µs(4)

0.7

1.0

1.6

A

0.65

1.8

IL

Output Leakage Current

VIN, Note 6, Output = 0V

2

mA

Note 6, Output = –1V

7.5

30

IQ

Quiescent Current

Note 6

5

10

mA

ISTBY

Standby Quiescent Current

ON/OFF Pin = 5V (OFF)

50

200

µA

θJA

Thermal Resistance

N Package, Junction to Ambient(7)

85

°C/W

On/Off Control, Fixed and Adjustable Regulators Test Circuit Figures 2, 3

VIH

ON/OFF Input Level

VOUT = 0V

2.2

1.4

V

2.4

V

VIL

ON/OFF Input Level

VOUT = 5V

1.2

1.0

V

0.8

V

IIH

ON/OFF Logic Current

ON/OFF = 5V (OFF)

4

30

µA

IIL

ON/OFF Logic Current

ON/OFF = 0V (ON)

0.01

10

µA

Notes:

4. Output (pin 2) sourcing current. No diode, inductor, or capacitor connected to input.

5. Feedback (pin 4) removed from output and connected to 0V.

6. Feedback (pin 4) removed from output and connected to 12V to force the output transistor OFF.

7. Junction-to-ambient thermal resistance with approximately 1 square inches of PC board copper surrounding the leads.

Test Circuit

VIN

PWR

GND

SIG

GND

ON/

OFF

OUT

FB

LM2574

(adjustable)

CIN

22µF

11DQ06

COUT

220µF

330µH

3.09k

1k

Figure 2. Adjustable Regulator Test Circuit

VIN

P W R

GND

SIG

GND

ON/

OFF

OUT

FB

LM2574–

3.3, 5, 12

CIN

22µF

11DQ06

COUT

220µF

330µH

Figure 3. Fixed Regulator Test Circuit

Аналогичный номер детали - LM2574-3.3BN

производитель	номер детали	датащи	подробное описание детали
Micrel Semiconductor	LM2574-3.3BN	67Kb / 5P	52kHz Simple 0.5A Buck Regulator
Micrel Semiconductor	LM2574-3.3BN	41Kb / 8P	52KHZ SIMPLE 0.5A BUCK REGULATOR

More results

Аналогичное описание - LM2574-3.3BN

производитель	номер детали	датащи	подробное описание детали
Micrel Semiconductor	LM2574	67Kb / 5P	52kHz Simple 0.5A Buck Regulator
	LM2574	41Kb / 8P	52KHZ SIMPLE 0.5A BUCK REGULATOR
	LM2576	64Kb / 9P	52kHz Simple 3A Buck Regulator
	LM2576-5.0WU	64Kb / 9P	52kHz Simple 3A Buck Regulator
	LM2576-5.0WT	58Kb / 9P	52kHz Simple 3A Buck Regulator
	LM2575-3.3BU	158Kb / 12P	52kHz Simple 1A Buck Regulator
	LM2575	158Kb / 12P	52kHz Simple 1A Buck Regulator
	LM2575	104Kb / 9P	52kHz Simple 1A Buck Regulator
	LM2576	89Kb / 8P	52kHz Simple 3A Buck Voltage Regulator
	MIC4574	462Kb / 7P	200kHz Simple 0.5A Buck Regulator

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Аналогичный номер детали - LM2574-3.3BN

Аналогичное описание - LM2574-3.3BN

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