500mV to 5.5V Input, Ultrasonic

Boost Converter with Short-Circuit

Protection and True Shutdown

MAX18002

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(VIN = 3V, VOUT = 3.3V, EN = high, TJ = -40ºC to +125ºC, unless otherwise specified. See Note 2.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Enable Input Leakage

ILEAK_EN

TJ = +25°C, VEN = 5.5V

0.3

100

nA

Enable Voltage High

Threshold

VIH

VEN rising, LX begins switching

0.8

1.2

V

Enable Voltage Low

Threshold

VIL

VEN falling, LX stops switching

0.4

V

PROTECTION

Inductor Peak Current

Limit

IPEAK_LX

VOUT = 3.3V (Note 7)

3

3.6

4

A

Short-Circuit Current

Limit

ISC

VIN = VEN = 2.5V, VOUT < 0.5V, VOUT

hysteresis = 100mV

400

700

1000

mA

Short-Circuit Detection

Time

tSC

VIN - VOUT = 0.7V

100

ns

Thermal-Shutdown

Threshold

TSHUT_R

TJ rising

165

˚C

TSHUT_F

TJ falling

150

Note 2: Limits over the specified operating temperature and supply voltage range are guaranteed by design and characterization

and production tested at room temperature only.

Note 3: This measurement was taken in test mode.

Note 4: Guaranteed by measuring LX frequency and duty cycle. Maximum duty cycle is a function of input voltage since LX on time

varies with VIN.

Note 5: The ultrasonic function is disabled when OUT regulation is set above 5V.

Note 6: This does not account for ripple, load regulation, and line regulation.

Note 7: This is a static measurement. The actual peak current limit and zero crossing threshold depend on VIN and L due to

propagation delays.

Note 8: This is the time required to determine the RSEL value. This time adds to the start-up time.