LM2575 datasheet(4/17 Pages) UMW

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LM2575HV-XX

LM2575-XX

LM2575-ADJ,LM2575HV-ADJ

Specifications with standard type face are for T

J = 25˚C, and those with boldface type apply over full Operating Tempera-

ture Range

Symbol

Parameter

Conditions

Units

(Limits)

Typ

Limit

SYSTEM PARAMETERS (Note 5) Test Circuit Figure 1

Feedback Voltage

4.5V

≤ V

IN ≤ 40V, 0.2A ≤ ILOAD ≤ 2A

1.230

OUT programmed for 3V. Circuit of Figure 1

1.193/1.180

V(min)

1.267/1.280

V(max)

Efficiency

IN = 12V, VOUT = 3V, ILOAD = 2A

All Output Voltage Versions Electrical Characteristics

Specifications with standard type face are for T

J = 25˚C, and those with boldface type apply over full Operating Tempera-

ture Range. Unless otherwise specified, V

IN = 12V for the 3.3V, 5V, and Adjustable version and VIN = 24V for the 12V ver-

sion. I

LOAD = 500 mA

Symbol

Parameter

Conditions

Units

(Limits)

Typ

Limit

DEVICE PARAMETERS

Feedback Bias Current

Adjustable Version Only, V

FB = 1.3V

50/100

nA (max)

Oscillator Frequency

(Note 6)

kHz

47/42

kHz(min)

58/63

kHz(max)

SAT

Saturation Voltage

OUT = 2A (Notes 7, 8)

1.16

1.4/1.5

V(max)

Max Duty Cycle (ON)

(Note 8)

100

Min Duty Cycle (OFF)

(Note 9)

Current Limit

Peak Current (Notes 7, 8)

4.5

3.6/3.4

A(min)

6.9/7.5

A(max)

Output Leakage Current

Output = 0V (Notes 7, 9)

µA(max)

Output = −1V (Note 10)

mA(max)

Quiescent Current

(Note 9)

mA(max)

STBY

Standby Quiescent Current

ON/OFF pin = 5V (OFF)

(Note 10)

µA

200/250

µA(max)

Thermal Resistance

TO-220 or TO-263 Package, Junction to Case

˚C/W

TO-220 Package, Junction to Ambient (Note 11)

˚C/W

TO-263 Package, Junction to Ambient (Note 12)

˚C/W

TO-263 Package, Junction to Ambient (Note 13)

˚C/W

TO-263 Package, Junction to Ambient (Note 14)

˚C/W

ON/OFF CONTROL Test Circuit Figure 1

ON /OFF Pin Logic Input

1.3

Threshold Voltage

Low (Regulator ON)

0.6

V(max)

High (Regulator OFF)

2.0

V(min)

Electrical Characteristics

LM2575HV

LM2575 -ADJ

-ADJ

www.umw-ic.com

友台半导体有限公司

2A Step-Down Voltage Regulator

UMW

UMW LM2575/LM2575HV

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