LTM4613

3

4613fd

For more information www.linear.com/LTM4613

ELECTRICAL CHARACTERISTICS The

l

denotes the specifications which apply over the full internal

operating temperature range, otherwise specifications are at TA = 25°C (Note 2), VIN = 24V, unless otherwise noted. Per Typical

Application (front page) configuration.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN(DC)

Input DC Voltage

l

5

36

V

VOUT(DC)

Output Voltage, Total Variation

with Line and Load

CIN = 10µF × 3, COUT = 47µF × 4; FCB = 0,

VIN = 24V to 36V, VOUT = 12V

l

11.83

12.07

12.31

V

Input Specifications

VIN(UVLO)

Undervoltage Lockout Threshold

IOUT = 0A

3.2

4.8

V

IINRUSH(VIN)

Input Inrush Current at Start-Up

IOUT = 0A; CIN = 10µF × 3, COUT = 47µF × 4; CSS = 22nF

VOUT = 12V

VIN = 24V

VIN = 36V

150

120

mA

mA

IQ(VIN)

Input Supply Bias Current

VIN = 36V, VOUT = 12V, Switching Continuous, IOUT = 0A

VIN = 24V, VOUT = 12V, Switching Continuous, IOUT = 0A

Shutdown, RUN = 0, VIN = 36V

78

60

50

mA

mA

µA

IS(VIN)

Input Supply Current

VIN = 36V, VOUT = 12V, IOUT = 8A

VIN = 24V, VOUT = 12V, IOUT = 8A

2.90

4.26

A

A

VINTVCC

Internal VCC Voltage

VIN = 36V, RUN > 2V, IOUT = 0A

4.7

5

5.5

V

Output Specifications

IOUT(DC)

Output Continuous Current Range VIN = 24V, VOUT = 12V (Note 4)

0

8

A

∆VOUT(LINE)

VOUT

Line Regulation Accuracy

VOUT = 12V, FCB = 0V, VIN = 24V to 36V,

IOUT = 0A

l

0.05

0.3

%

∆VOUT(LOAD)

VOUT

Load Regulation Accuracy

VOUT = 12V, FCB = 0V, IOUT = 0A to 8A (Note 4)

VIN = 36V

VIN = 24V

l

l

0.5

0.5

0.75

0.75

%

%

VIN(AC)

Input Ripple Voltage

IOUT = 0A,

CIN = 1 × 10µF X5R Ceramic and 1 × 100µF Electrolytic,

3 × 10µF X5R Ceramic on VD Pins

VIN = 24V, VOUT = 12V (Note 5)

10

mVP-P

VOUT(AC)

Output Ripple Voltage

IOUT = 0A,

COUT = 1 × 10µF, 4 × 47µF X5R Ceramic

VIN = 24V, VOUT = 12V

19

mVP-P

fS

Output Ripple Voltage Frequency

VIN = 24V, VOUT = 12V, IOUT = 0A

600

kHz

∆VOUT(START) Turn-On Overshoot

COUT = 47µF × 4, VOUT = 12V, IOUT = 0A, CSS = 22nF

VIN = 36V

VIN = 24V

20

20

mV

mV

tSTART

Turn-On Time

COUT = 47µF × 4, VOUT = 12V, IOUT = 0A, CSS = Open

VIN = 36V

VIN = 24V

0.3

0.3

ms

ms

∆VOUT(LS)

Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load

COUT = 1 × 10µF, 3 × 47µF X5R Ceramic, 1 × 47µF POSCAP

VIN = 24V, VOUT = 12V

250

mV

tSETTLE

Settling Time for Dynamic Load

Step

Load: 0% to 50% to 0% of Full Load

COUT = 1 × 10µF, 3 × 47µF X5R Ceramic, 1 × 47µF POSCAP

VIN = 24V, VOUT = 12V

100

µs

IOUT(PK)

Output Current Limit

COUT = 47µF × 4

VIN = 36V, VOUT = 12V

VIN = 24V, VOUT = 12V

12

12

A

A