LTM4627_15 datasheet(3/32 Pages) LINER

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LTM4627

4627fc

For more information www.linear.com/LTM4627

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified internal

operating temperature range, otherwise specifications are at TA = 25°C (Note 2), VIN = 12V, per the typical application in Figure 18.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input DC Voltage

4.5

VOUT(DC)

Output Voltage, Total

Variation with Line and Load

CIN = 22µF × 3

COUT = 100µF Ceramic, 470µF POSCAP

RFB = 40.2k, MODE_PLLIN = GND

VIN = 5V to 20V, IOUT = 0A to 15A (Note 4)

1.477

1.50

1.523

Input Specifications

VRUN

RUN Pin On Threshold

VRUN Rising

1.1

1.25

1.4

VRUNHYS

RUN Pin On Hysteresis

130

IQ(VIN)

Input Supply Bias Current

VIN = 12V, VOUT = 1.5V, Burst Mode Operation, IOUT = 0.1A

VIN = 12V, VOUT = 1.5V, Pulse-Skipping Mode, IOUT = 0.1A

VIN = 12V, VOUT = 1.5V, Switching Continuous, IOUT = 0.1A

Shutdown, RUN = 0, VIN = 12V

µA

IS(VIN)

Input Supply Current

VIN = 5V, VOUT = 1.5V, IOUT = 15A

VIN = 12V, VOUT = 1.5V, IOUT = 15A

5.05

2.13

Output Specifications

IOUT(DC)

Output Continuous Current

Range

VIN = 12V, VOUT = 1.5V (Note 4)

∆VOUT (Line)

VOUT

Line Regulation Accuracy

VOUT = 1.5V, VIN from 4.5V to 20V

IOUT = 0A

0.02

0.06

%/V

∆VOUT (Load)

VOUT

Load Regulation Accuracy

VOUT = 1.5V, IOUT = 0A to 15A, VIN = 12V (Note 4)

0.2

0.45

VOUT(AC)

Output Ripple Voltage

IOUT = 0A, COUT = 100µF Ceramic, 470µF POSCAP

VIN = 12V, VOUT = 1.5V

mVP-P

∆VOUT(START)

Turn-On Overshoot

COUT = 100µF Ceramic, 470µF POSCAP,

VOUT = 1.5V, IOUT = 0A, VIN = 12V

tSTART

Turn-On Time

COUT = 100µF Ceramic, 470µF POSCAP,

No Load, TRACK/SS = 0.001µF, VIN = 12V

0.6

∆VOUTLS

Peak Deviation for Dynamic

Load

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

COUT = 100µF Ceramic, 470µF POSCAP,

VIN = 12V, VOUT = 1.5V

tSETTLE

Settling Time for Dynamic

Load Step

Load: 0% to 50% to 0% of Full Load VIN = 5V,

COUT = 100µF Ceramic, 470µF POSCAP

µs

IOUTPK

Output Current Limit

VIN = 12V, VOUT = 1.5V

VIN = 5V, VOUT = 1.5V

Control Section

VFB

Voltage at VFB Pin

IOUT = 0A, VOUT = 1.5V

0.594

0.60

0.606

IFB

Current at VFB Pin

(Note 7)

–12

–25

VOVL

Feedback Overvoltage

Lockout

0.65

0.67

0.69

ITRACK/SS

Track Pin Soft-Start Pull-Up

Current

TRACK/SS = 0V

1.0

1.2

1.4

µA

tON(MIN)

Minimum On-Time

(Note 3)

RFBHI

Resistor Between VOUT_LCL

and VFB Pins

60.05

60.40

60.75

kΩ

VOSNS+,

VOSNS– CM RANGE

Common Mode Input Range VIN = 12V, Run > 1.4V

VDIFF_OUT(MAX)

Maximum DIFF_OUT Voltage IDIFF_OUT = 300µA

INTVCC – 1.4

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