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LTM4623EY

Ultrathin 20VIN , 3A Step-Down DC/DC µModule Regulator

Linear Technology 

LTM4623

Electrical Characteristics The l denotes the specifications which apply over the full internal

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

the front page.

SYMBOL

PARAMETER

ΔVOUT (Line)/VOUT Line Regulation Accuracy

ΔVOUT (Load)/VOUT Load Regulation Accuracy

VOUT(AC)

Output Ripple Voltage

ΔVOUT(START)

Turn-On Overshoot

tSTART

Turn-On Time

ΔVOUTLS

tSETTLE

IOUTPK

VFB

IFB

RFBHI

ITRACK/SS

VIN(UVLO)

Peak Deviation for Dynamic

Load

Settling Time for Dynamic

Load Step

Output Current Limit

Voltage at FB Pin

Current at FB Pin

Resistor Between VOUT and

FB Pins

Track Pin Soft-Start Pull-Up

Current

VIN Undervoltage Lockout

tON(MIN)

tOFF(MIN)

VPGOOD

Minimum On-Time

Minimum Off-Time

PGOOD Trip Level

IPGOOD

VPGL

VINTVCC

VINTVCC Load Reg

fOSC

PGOOD Leakage

PGOOD Voltage Low

Internal VCC Voltage

INTVCC Load Regulation

Oscillator Frequency

CONDITIONS

VOUT = 1.5V, VIN = 4V to 20V, IOUT = 0A

VOUT = 1.5V, IOUT = 0A to 3A

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

VOUT = 1.5V

IOUT = 0A, COUT = 100µF Ceramic, TRACK/SS = 0.01µF,

VIN = 12V, VOUT = 1.5V

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

VIN = 12V, VOUT = 1.5V

Load: 0% to 50% to 0% of Full Load, COUT = 47µF

Ceramic, VIN = 12V, VOUT = 1.5V

Load: 0% to 50% to 0% of Full Load, COUT = 47µF

Ceramic, VIN = 12V, VOUT = 1.5V

VIN = 12V, VOUT = 1.5V

IOUT = 0A, VOUT = 1.5V, –40°C to 125°C

(Note 4)

TRACK/SS = 0V

VIN Falling, SVIN = VIN

VIN Hysteresis, SVIN = VIN

(Note 4)

(Note 4)

VFB With Respect to Set Output

VFB Ramping Negative

VFB Ramping Positive

IPGOOD = 1mA

SVIN = 4V to 20V

ICC = 0mA to 20mA

FREQ = OPEN

MIN

l

l

3.5

l 0.592

60.05

2.4

–15

7

3.1

TYP

0.04

0.5

5

30

2.5

80

40

5

0.60

60.40

2

2.6

350

40

70

–10

10

0.02

3.3

0.5

1

MAX

0.15

1.5

0.606

±30

60.75

4

2.8

–7

15

2

0.1

3.4

UNITS

%/V

%

mV

mV

ms

mV

µs

A

V

nA

kΩ

µA

V

mV

ns

ns

%

%

µA

V

V

%

MHz

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTM4623 is tested under pulsed load conditions such that

TJ ≈ TA. The LTM4623E is guaranteed to meet performance specifications

over the 0°C to 125°C internal operating temperature range. Specifications

over the –40°C to 125°C internal operating temperature range are assured

by design, characterization and correlation with statistical process

controls. The LTM4623I is guaranteed to meet specifications over the

full –40°C to 125°C internal operating temperature range. Note that the

maximum ambient temperature consistent with these specifications is

determined by specific operating conditions in conjunction with board

layout, the rated package thermal resistance and other environmental

factors.

Note 3: See output current derating curves for different VIN, VOUT and TA.

Note 4: 100% tested at wafer level.

Note 5: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

4623fa

For more information www.linear.com/LTM4623

3

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