LTM4604A datasheet(3/20 Pages) LINER

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LTM4604A

4604af

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 LTM4604AE is guaranteed to meet performance speciﬁcations

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

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

ELECTRICAL CHARACTERISTICS The ● denotes the speciﬁcations which apply over the full internal

operating temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 5V unless otherwise noted. See Figure 15.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IS(VIN)

Input Supply Current

VIN = 2.5V, VOUT = 1.5V, IOUT = 4A

VIN = 3.3V, VOUT = 1.5V, IOUT = 4A

VIN = 5V, VOUT = 1.5V, IOUT = 4A

2.9

2.2

1.45

Output Speciﬁcations

IOUT(DC)

Output Continuous Current

Range (Note 3)

VIN = 3.3V, VOUT = 1.5V

ΔVOUT(LINE)

VOUT

Line Regulation Accuracy

VOUT = 1.5V, VIN from 2.375V to 5.5V, IOUT = 0A

●

0.1

0.2

ΔVOUT(LOAD)

VOUT

Load Regulation Accuracy

VOUT = 1.5V, 0A to 4A (Note 3)

VIN = 3.3V

VIN = 5V

●

0.3

0.6

VOUT(AC)

Output Ripple Voltage

IOUT = 0A

VIN = 3.3V, VOUT = 1.5V

VIN = 5V, VOUT = 1.5V

mVP-P

Output Ripple Voltage

Frequency

IOUT = 4A, VIN = 5V, VOUT = 1.5V

1.25

MHz

ΔVOUT(START)

Turn-On Overshoot

VOUT = 1.5V, RUN/SS = 10nF,

IOUT = 0A

VIN = 3.3V

VIN = 5V

tSTART

Turn-on Time

VOUT = 1.5V, IOUT = 1A Resistive Load, TRACK = VIN

and RUN/SS = Float

VIN = 3.3V

VIN = 5V

1.5

1.0

ΔVOUT(LS)

Peak Deviation for Dynamic

Load Step

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

COUT = 22μF ×3 Ceramic

VIN = 5V, VOUT = 1.5V

tSETTLE

Settling Time for Dynamic

Load Step

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

VIN = 5V, VOUT = 1.5V

μs

IOUT(PK)

Output Current Limit

VIN = 3.3V, VOUT = 1.5V

VIN = 5V, VOUT = 1.5V

Control Section

VFB

Voltage at FB Pin

IOUT = 0A, VOUT = 1.5V

●

0.793

0.788

0.8

0.807

0.808

IFB

0.2

μA

VRUN

RUN Pin On/Off Threshold

0.5

0.65

0.8

ITRACK

TRACK Pin Current

0.2

μA

VTRACK(OFFSET)

Offset Voltage

TRACK = 0.4V

VTRACK(RANGE)

Tracking Input Range

0.8

RFBHI

Resistor Between VOUT and

FB Pins

4.975

4.99

5.025

kΩ

PGOOD

ΔVPGOOD

PGOOD Range

±7.5

RPGOOD

PGOOD Resistance

Open-Drain Pull-Down

150

by design, characterization and correlation with statistical process controls.

The LTM4604AI is guaranteed to meet speciﬁcations over the full internal

operating temperature range. Note that the maximum ambient temperature

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.

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