MAX1733EUK datasheet(3/8 Pages) MAXIM

Part #	MAX1733EUK

Description	Low-Voltage, Step-Down DC-DC Converters in SOT23

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Manufacturer	MAXIM [Maxim Integrated Products]

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3 / 8 page

Low-Voltage, Step-Down DC-DC Converters

in SOT23

_______________________________________________________________________________________

3

Note 1: All devices are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design.

ELECTRICAL CHARACTERISTICS

(VIN = +2.7V to +5.5V, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

UNITS

Input Voltage Range

VIN

2.7

5.5

V

Startup Voltage

VSTART

2.0

V

VIN rising, 200mV typical hysteresis

1.95

UVLO Threshold

VUVLO

VIN falling

1.55

V

Quiescent Supply Current

IIN

No switching (FB/OUT above trip point)

70

µA

Shutdown Supply Current

ISHDN

SHDN = GND

4

µA

Output Voltage Range (MAX1733)

VOUT

1.25

2.0

V

Output Voltage Accuracy

(MAX1734)

IOUT = 0 to 250mA

-3

+3

%

OUT Sense Current (MAX1734)

IOUT

VOUT = VREG, VIN = V SHDN = 5V

8

µA

FB Feedback Threshold

(MAX1733)

VFB

VIN = 3.6V

1.210

1.280

V

FB Leakage Current (MAX1733)

IFB

VFB = 1.5V

0.2

µA

SHDN Input High Voltage

VIH

2.7V < VIN < 5.5V

1.6

V

SHDN Input Low Voltage

VIL

2.7V < VIN < 5.5V

0.4

V

SHDN Leakage Current

ISHDN

SHDN = GND or IN

1

µA

High-Side Current Limit

ILIMP

300

565

mA

Low-Side Current Limit

ILIMN

200

430

mA

ILX = -50mA, VIN = 3.0V

1.4

High-Side On-Resistance

RONP

ILX = -50mA, VIN = 5.5V

1.1

Ω

ILX = -50mA, VIN = 3.0V

2

Rectifier On-Resistance

RONN

ILX = -50mA, VIN = 5.5V

1.6

Ω

LX Leakage Current

ILXLEAK

VIN = 5.5V, VLX = 0 to VIN

5

µA

LX Reverse Leakage Current

ILXLK,R

IN unconnected, VLX = 5.5V, SHDN = GND

5

µA

Minimum On-Time

tON(MIN)

0.25

0.55

µs

Minimum Off-Time

tOFF(MIN)

0.25

0.55

µs

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