MAX1536ETI-T View Datasheet(PDF) - Maxim Integrated

Part Name

Description

MFG CO.

MAX1536ETI-T

3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step Down Regulator with Dynamic Output Voltage Control

Maxim Integrated 

3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-

Down Regulator with Dynamic Output Voltage Control

ABSOLUTE MAXIMUM RATINGS

VCC, IN, SHDN, SKIP to AGND ................................-0.3V to +6V

OD, OD, GATE, PGOOD to AGND...........................-0.3V to +6V

COMP, FB, REF to AGND.........................................-0.3V to +6V

TOFF, REFIN, FBLANK to AGND .............................-0.3V to +6V

IN to VCC ...............................................................-0.3V to +0.3V

PGND to AGND .................................................... -0.3V to +0.3V

LX to PGND ................................................ -0.3V to (VIN + 0.3V)

LX Current (Note 1).............................................................±5.7A

REF Short Circuit to AGND.........................................Continuous

Continuous Power Dissipation (TA = +70°C)

28-Pin Thin QFN (derated 20.8mW/°C above +70°C;

part mounted on 1in2 of 1oz copper) .........................1667mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Note 1: LX has clamp diodes to PGND and IN. Thermal limits dictate the maximum continuous current through these diodes.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, VIN = VCC = VSHDN = +3.3V, VREFIN = +1.5V, SKIP = AGND, TA = 0°C to +85°C, unless otherwise noted. Typical

values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

PWM CONTROLLER

Input Voltage

Output Adjust Range

VIN, VCC

VOUT

3.0

VREFIN

5.5

V

VIN

V

Feedback Voltage Accuracy

VFB - VCC = VIN = +3.0V to

VREFIN +5.5V, ILOAD = 0

TA = +25°C to +85°C -3

TA = 0°C to +85°C

-4

0

+3

mV

0

+4

Feedback Load Regulation

ILOAD = 0 to 3.5A, VCC = VIN = +3.0V to +5.5V,

SKIP = VCC

0.3

%

FB Input Bias Current

Dropout

IFB

VDO

VFB = 1.01 × VREFIN

VCC = VIN = +3.0V, ILOAD = 3A, FB = AGND

-50

+50

nA

189 330 mV

PMOS Switch On-Resistance

NMOS Switch On-Resistance

Maximum Output Current

RPMOS

RNMOS

IOUT(RMS)

VCC = VIN = +4.5V, ILOAD = 0.5A

VCC = VIN = +3.0V, ILOAD = 0.5A

VCC = VIN = +4.5V, ILOAD = 0.5A

VCC = VIN = +3.0V, ILOAD = 0.5A

(Note 2)

54

90

mΩ

63

110

47

80

mΩ

53

90

3.6

A

Current-Limit Threshold

Idle Mode Current Threshold

ILIMIT

(Note 3)

SKIP = AGND

4.0

4.8

5.5

A

0.21 0.60 1.00

A

Zero-Cross Current Threshold

SKIP = AGND

200

mA

Switching Frequency

fSW (Note 2)

1.4 MHz

Off-Time

Extended Off-Time

On-Time

Soft-Start Time

Quiescent Supply Current

tOFF

tON

ICC + IIN

VFB ≥ 0.3 × VREFIN

VFB < 0.3 × VREFIN

(Note 2)

RTOFF = 30.1kΩ

RTOFF = 110kΩ

RTOFF = 499kΩ

(Note 3)

SKIP = AGND, VFB = 1.01 × VREFIN

0.24 0.30 0.37

0.85 1.00 1.15

3.8

4.5

5.2

4 × tOFF

0.3

3 × 256

350 750

µs

µs

µs

Cycles

µA

2 _______________________________________________________________________________________

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