MAX618EEE datasheet(3/14 Pages) MAXIM

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28V, PWM, Step-Up DC-DC Converter

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS

(VIN = +6V, PGND = GND, CVL = 4.7µF, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)

100

0.1

100

1000

EFFICIENCY vs. OUTPUT CURRENT

(VOUT = 12V)

OUTPUT CURRENT (mA)

VIN = 8V

VIN = 5V

VIN = 3V

100

0.1

100

1000

EFFICIENCY vs. OUTPUT CURRENT

(VOUT = 28V)

OUTPUT CURRENT (mA)

VIN = 12V

VIN = 5V

VIN = 3V

Typical Operating Characteristics

(Circuit of Figure 1, TA = +25°C.)

Note 2: Specifications to -40°C are guaranteed by design, not production tested.

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

Supply Current, Full Load

IIN

Supply Current, Full Load,

VL Connected to IN

IIN

7.5

Supply Current Shutdown

IIN

µA

VL Output Voltage

VVL

2.85

3.3

Supply Current, No Load

Input Voltage

VIN

328

IIN

800

µA

VL Undervoltage Lockout

VVL

2.55

2.85

FB Set Voltage

VFB

1.455

1.545

LX Voltage Range

VLXON

LX Switch Current Limit

ILXON

1.4

LX On-Resistance

RLXON

0.6

Ω

Switching Frequency

188

312

kHz

CONDITIONS

Rising edge, 1% hysteresis

VIN = 3.4V to 28V, VFB = 1.4V, SHDN = VL,

VL < VIN

VIN = 3V to 5.5, VFB = 1.4V, SHDN = VL = IN

VIN = 28V, VFB = 1.6V, SHDN = GND

PWM mode

VIN = 3.5V or 28V, no load

VIN = 3V to 28V, VFB = 1.6V, SHDN = VL

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