LTM4604 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTM4604

Low Voltage, 4A DC/DC µModule™ with Tracking

Linear Technology 

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LTM4604

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

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

SYMBOL

PARAMETER

CONDITIONS

MIN TYP MAX

IS(VIN)

Input Supply Current

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

2.9

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

2.2

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

1.45

Output Specifications

IOUT(DC)

Output Continuous Current

Range (See Output Current

VIN = 3.3V, VOUT = 1.5V

Derating Curves for Different

VIN, VOUT and TA)

ΔVOUT(LINE)

Line Regulation Accuracy

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

●

4

0.1

0.2

VOUT

ΔVOUT(LOAD)

VOUT

VOUT(AC)

fS

Load Regulation Accuracy

Output Ripple Voltage

Output Ripple Voltage

Frequency

VOUT = 1.5V, 0A to 4A

VIN = 3.3V

VIN = 5V

IOUT = 0A, COUT = 22μF/X5R/Ceramic ×3

VIN = 3.3V, VOUT = 1.5V

VIN = 5V, VOUT = 1.5V

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

●

0.3

0.6

●

0.3

0.6

10

12

1.25

ΔVOUT(START)

Turn-On Overshoot

COUT = 22μF ×3, VOUT = 1.5V, RUN/SS = 10nF,

IOUT = 0A

VIN = 3.3V

20

VIN = 5V

20

tSTART

Turn-on Time

COUT = 22μF ×3, VOUT = 1.5V, IOUT = 1A Resistive Load,

TRACK = VIN and RUN/SS = Float

VIN = 3.3V

1.5

VIN = 5V

1.0

ΔVOUT(LS)

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

Load Step

COUT = 22μF ×3 Ceramic

VIN = 5V, VOUT = 1.5V

25

tSETTLE

Settling Time for Dynamic Load: 0% to 50% to 0% of Full Load

Load Step

VIN = 5V, VOUT = 1.5V

10

IOUT(PK)

Output Current Limit

COUT = 22μF ×3

VIN = 3.3V, VOUT = 1.5V

8

VIN = 5V, VOUT = 1.5V

8

Control Section

VFB

IFB

VRUN

ITRACK

VTRACK(OFFSET)

VTRACK(RANGE)

RFBHI

Voltage at FB Pin

RUN Pin On/Off Threshold

TRACK Pin Current

Offset Voltage

Tracking Input Range

Resistor Between VOUT and

FB Pins

IOUT = 0A, VOUT = 1.5V, 0°C ≤ TA ≤ 85°C

IOUT = 0A, VOUT = 1.5V

TRACK = 0.4V

0.792 0.8 0.808

● 0.788 0.8 0.812

0.2

0.5 0.65 0.8

0.2

30

0

0.8

4.975 4.99 5.025

PGOOD

ΔVPGOOD

RPGOOD

PGOOD Range

PGOOD Resistance

Open-Drain Pull-Down

±7.5

90 150

UNITS

A

A

A

A

%

%

%

mVP-P

mVP-P

MHz

mV

mV

ms

ms

mV

μs

A

A

V

V

μA

V

μA

mV

V

kΩ

%

Ω

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 LTM4604E is guaranteed to meet performance specifications

from 0°C to 85°C. Specifications over the – 40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls. The LTM4604I is guaranteed over the full

–40°C to 85°C temperature range.

4604f

3

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