500mV to 5.5V Input nanoPower

Boost Converter with Short-Circuit

Protection

and True Shutdown

MAX18000

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Analog Devices | 4

Electrical Characteristics

(VIN = 3V, VOUT = 3.3V, EN = HIGH, TJ = -40°C to +125°C, unless otherwise specified, (Note 2).)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

VIN

Input Range after start-up (Note 3)

0.5

5.5

V

Input Voltage UVLO

VIN_UVLO

VIN Rising, When VOUT is 1V or below

1.75

1.8

1.85

V

VIN Falling, When VOUT is 1V or below

1.65

1.7

1.75

Supply Current Into

OUT

IQ_OUT

VEN = VIN, Not Switching, VOUT = 105%

of Target Voltage, TJ = +25°C, RSEL =

191KΩ

512

800

nA

Supply Current Into IN

IQ_IN

VEN = VIN, Not Switching, VOUT = 105%

of Target Voltage, TJ = +25°C

-100

+10

+100

nA

Input Shutdown Current

ISD_IN

VEN = VOUT = 0V, TJ = +25°C

7

36

nA

LX Maximum Duty

Cycle

DC_NPWR

TJ = +25°C (Note 4)

85

%

POWER SWITCHES

High-Side RDSON

RDS_H

60

90

mΩ

Low-Side RDSON

RDS_L

30

60

mΩ

OUTPUT VOLTAGE

Output Voltage Range

VOUT

(Note 3, Note 8)

2.5

5.5

V

Output Accuracy

VOUT_ACC

Measured when the part exits nanoPower

Mode and is in Skip Mode (Note 5)

-1

+1

%

DC Load Regulation

ACCLOAD

Load from 20mA to IOUT at 80% of Peak

Inductor Current

-1

%

DC Line Regulation

ACCLINE

Duty Cycle varied from 25% to Maximum

-1

%

LX SWITCHING WAVEFORMS

Switching Frequency

FSW

VIN = 3.3V, VOUT - VIN > 0.25V, PWM

mode, TJ = 25°C

2

MHz

LX TON

TON_3.3V

VIN = 3.3V, VOUT = 5V

136

170

204

ns

TON_1.8V

VIN = 1.8V, VOUT = 5V

256

320

384

LX Minimum TON

TONMIN

VIN = 3V, VOUT = 3.3V

50

60

70

ns

LX Minimum TOFF

TOFFMIN

VIN = 3V, VOUT = 3.3V

50

60

70

ns

LIGHT LOAD CONDITION

Zero-Crossing

Threshold

IZX_LX

(Note 6)

75

150

225

mA

nanoPower regulation

Hysteresis

VNPWR_HYS

VIN = 3V, VOUT = 3.3V (Note 9)

66

83

132

mV

STARTUP

Soft-Start Time

tSS_LINEAR

Target VIN = VOUT

= 3.6V, Linear

Mode, COUTEFF =

22μ , TJ = 25°C

In linear phase

350

µs

Soft-Start Rate

dV/dt

VIN = 3.6V, VOUT

from 3.3V to 5V,

COUTEFF = 22μ ,

TJ = 25°C

In boost phase

3

V/ms

ENABLE, RSEL, ACTIVE DISCHARGE

Required Select

Resistor Accuracy

ACCRSEL

Use the resistor from RSEL Selection

Table.

±1

%