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MAX1515

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

Maxim Integrated 

Low-Voltage, Internal Switch,

Step-Down/DDR Regulator

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, VIN = +3.3V, VCC = VDD = SHDN = MODE = +3.3V, VREFIN = VREF, SKIP = GND, TA = -40°C to +85°C, unless

otherwise noted. Note 5)

PARAMETER

PWM CONTROLLER

Input Voltage Range

Output Adjust Range

SYMBOL

CONDITIONS

VIN

VCC, VDD

VFB -

VREFIN

VOUT ≤ VIN

VIN = +3.3V, ILOAD = 0, MODE = VCC

MIN TYP MAX UNITS

1.3

3.6

V

3.0

3.6

0.5

VCC

V

-5

+5

mV

FBSEL0 = VCC,

FBSEL1 = VCC,

REFIN = REF

2.438

2.562

Feedback Voltage Accuracy

FBSEL0 = VCC,

FBSEL1 = GND, 1.755

VFB

VIN = +3.3V, ILOAD = 0,

MODE = low

REFIN = REF

FBSEL0 = GND,

FBSEL1 = VCC, 1.463

REFIN = REF

1.845

V

1.538

Sink-Mode Detect Threshold

Source-Mode Detect Threshold

nFET On-Resistance

Switching Frequency

Current-Limit Threshold

Pulse-Skipping Current Threshold

Off-Time

Maximum On-Time

SS Source Current

SS Sink Current

FBSEL0 = GND,

FBSEL1 = GND,

REFIN = 0.5V

VFB -

VREFIN

VFB -

VREFIN

RNMOS

fSW

ILIMIT_P

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

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

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

(Note 2)

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

positive or sourcing mode

ISKIP_P

tOFF

tON(MAX)

ISS(SRC)

ISS(SNK)

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

positive or sourcing mode

VFB > 0.3 x VTARGET

(Note 4)

RTOFF = 33.2kΩ

RTOFF = 110kΩ

RTOFF = 499kΩ

0.487

+15

-35

3.35

0.4

0.250

0.8

3.8

5

3

100

0.513

+35

mV

-15

mV

0.10

Ω

1

MHz

5.05

A

1.2

A

0.425

1.2

µs

5.2

µs

7

µA

µA

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