MAX1515ETG datasheet(3/24 Pages) MAXIM

Part #	MAX1515ETG

Description	Low-Voltage, Internal Switch, Step-Down/DDR Regulator

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Manufacturer	MAXIM [Maxim Integrated Products]

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Low-Voltage, Internal Switch,

Step-Down/DDR Regulator

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, VIN = +3.3V, VCC = VDD = SHDN = MODE = +3.3V, VREFIN = VREF, SKIP = GND, TA = 0°C to +85°C, unless oth-

erwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Sink-Mode Detect Threshold

VFB -

VREFIN

MODE = VCC, VREFIN = +0.5V to +1.5V

+18

+32

mV

Source-Mode Detect Threshold

VFB -

VREFIN

MODE = VCC, VREFIN = +0.5V to +1.5V

-32

-18

mV

MOSFET On-Resistance

RNMOS

VCC = VDD = VIN = +3.3V, ILOAD = 0.5A

0.04

0.10

Ω

Switching Frequency

fSW

(Note 2)

1

MHz

Maximum Output Current

IOUT(RMS)

(Note 3)

3.3

A

ILIMIT_P

VIN = +3.3V, MODE = GND or VCC,

positive or sourcing mode

3.60

4.2

4.85

Current-Limit Threshold

ILIMIT_N

MODE = VCC, negative or sinking mode

-3.0

A

Pulse-Skipping Current Threshold

ISKIP_P

VIN = +3.3V, MODE = GND or VCC, positive

or sourcing mode

0.5

0.8

1.1

A

IZX_P

VIN = +3.3V, MODE = GND or VCC, positive

or sourcing mode

200

Zero Cross Current Threshold

IZX_N

MODE = VCC, negative or sinking mode

-350

mA

FB Input Bias Current

FB = 1.01 x VTARGET (Note 4)

-50

+50

nA

RTOFF = 33.2k

Ω

0.270

0.34

0.405

RTOFF = 110k

Ω

0.85

1.00

1.15

Off-Time

tOFF

VFB > 0.3 x VTARGET

(Note 4)

RTOFF = 499k

Ω

3.8

4.5

5.2

µs

Extended Off-Time

tOFF(EXT)

VFB < 0.3 x VTARGET (Notes 2, 4)

4 x

tOFF

µs

Minimum On-Time

tON(MIN)

(Note 2)

180

ns

Maximum On-Time

tON(MAX)

511

µs

SS Source Current

ISS(SRC)

3.50

5.25

6.75

µA

SS Sink Current

ISS(SNK)

100

µA

MODE = GND,

FBSEL0 = GND,

FBSEL1 = GND,

VFB = 1.01 x

VTARGET

450

800

No-Load Supply Current

ICC + IDD

+ IIN

VIN = 3.3V

(not switching) (Note 4)

MODE = VCC,

VFB = VTARGET

700

1200

µA

ICC + IDD

+ IIN

SHDN = MODE = GND, LX = 0V or 3.3V

0.2

20

IIN

SHDN = MODE = GND, LX = 0V

0.2

20

Shutdown Supply Currents

ILX

SHDN = MODE = GND, LX = 3.3V

0.1

20

µA

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