LTM4622 datasheet(3/28 Pages) LINER

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LTM4622

Rev F

For more information www.analog.com

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the full internal

operating temperature range (Note 2). Specified as each individual output channel at TA = 25°C, VIN = 12V, unless otherwise noted per

the typical application shown in Figure 24.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Switching Regulator Section: per Channel

VIN

Input DC Voltage

3.6

VIN_3.3

3.3V Input DC Voltage

VIN = INTVCC

3.1

3.3

3.5

VOUT(RANGE)

Output Voltage Range

VIN = 3.6V to 20V

0.6

5.5

VOUT(DC)

Output Voltage, Total Variation

with Line and Load

CIN = 22µF, COUT = 100µF Ceramic, RFB = 40.2k,

MODE = INTVCC,VIN = 3.6V to 20V, IOUT = 0A to 2.5A

1.477

1.50

1.523

VRUN

RUN Pin On Threshold

RUN Threshold Rising

RUN Threshold Falling

1.20

0.97

1.27

1.00

1.35

1.03

IQ(VIN)

Input Supply Bias Current

VIN = 12V, VOUT = 1.5V, MODE = GND

VIN = 12V, VOUT = 1.5V, MODE = INTVCC

Shutdown, RUN1 = RUN2 = 0

500

µA

IS(VIN)

Input Supply Current

VIN = 12V, VOUT = 1.5V, IOUT = 2.5A

0.35

IOUT(DC)

Output Continuous Current Range VIN = 12V, VOUT = 1.5V (Note 3)

2.5

ΔVOUT (Line)/VOUT Line Regulation Accuracy

VOUT = 1.5V, VIN = 3.6V to 20V, IOUT = 0A

0.01

0.1

%/V

ΔVOUT (Load)/VOUT Load Regulation Accuracy

VOUT = 1.5V, IOUT = 0A to 2.5A

0.2

1.0

VOUT(AC)

Output Ripple Voltage

IOUT = 0A, COUT = 100µF Ceramic, VIN = 12V,

VOUT = 1.5V

ΔVOUT(START)

Turn-On Overshoot

IOUT = 0A, COUT = 100µF Ceramic, VIN = 12V,

VOUT = 1.5V

tSTART

Turn-On Time

COUT = 100µF Ceramic, No Load, TRACK/SS = 0.01µF,

VIN = 12V, VOUT = 1.5V

4.3

ΔVOUTLS

Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load, COUT = 100µF

Ceramic, VIN = 12V, VOUT = 1.5V

100

tSETTLE

Settling Time for Dynamic Load

Step

Load: 0% to 50% to 0% of Full Load, COUT = 100µF

Ceramic, VIN = 12V, VOUT = 1.5V

µs

IOUTPK

Output Current Limit

VIN = 12V, VOUT = 1.5V

VFB

Voltage at FB Pin

IOUT = 0A, VOUT = 1.5V

0.592

0.60

0.608

IFB

Current at FB Pin

(Note 4)

±30

RFBHI

Resistor Between VOUT and FB

Pins

60.00

60.40

60.80

kΩ

ITRACK/SS

Track Pin Soft-Start Pull-Up

Current

TRACK/SS = 0V

1.4

µA

tSS

Internal Soft-Start Time

10% to 90% Rise Time (Note 4)

400

700

μs

tON(MIN)

Minimum On-Time

(Note 4)

tOFF(MIN)

Minimum Off-Time

(Note 4)

VPGOOD

PGOOD Trip Level

VFB With Respect to Set Output

VFB Ramping Negative

VFB Ramping Positive

–8

–14

RPGOOD

PGOOD Pull-Down Resistance

1mA Load

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