MAX1705D datasheet(3/20 Pages) MAXIM

Part #	MAX1705D

Description	1- to 3-Cell, High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator

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Manufacturer	MAXIM [Maxim Integrated Products]

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1- to 3-Cell, High-Current, Low-Noise,

Step-Up DC-DC Converters with Linear Regulator

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VOUT = VPOUT = VLBP = 3.6V, CLK/SEL = FB = LBN = LBO = ONA = ONB = TRACK = GND, REF = open (bypassed with 0.22µF),

LX = open, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

f = 300kHz

VOUT = 5.5V, CLK/SEL, TRACK

VLBO = VOUT = 5V

ISINK = 1mA, VOUT = 2.5V, LBP = GND,

LBN = OUT

1.2V < VOUT < 5.5V, ONA, ONB (Note 3)

VOUT = 2.5V, CLK/SEL, TRACK

VLBN = VLBP = 1V

VLBN = 0.5V and 1.5V (at least one input must

be within this range)

Hysteresis approximately 10°C

LBP falling

1.2V < VOUT < 5.5V, ONA, ONB (Note 3)

LBP rising

CONDITIONS

µA

1

Input Leakage Current

(CLK/SEL, ONA, ONB, TRACK)

0.8VOUT

V

0.8VOUT

Input High Level

0.2VOUT

V

0.2VOUT

Input Low Level

dB

38

AC Power-Supply Rejection

µA

1

LBO High Leakage

V

0.4

LBO Output Low Voltage

nA

0.01

50

LBN, LBP Input Current

V

0.5

1.5

LBN, LBP Common-Mode

Input Range

°C

155

Thermal Shutdown

mV

-5

5

LBN, LBP Offset

mV

16

LBN, LBP Hysteresis

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

mA

20

70

120

P-Channel Synchronous-

Rectifier Turn-Off Current

VLX = 0V, V ONB = VOUT = 5.5V

µA

0.1

20

POUT Leakage Current

CLK/SEL = GND

250

435

550

CLK/SEL = OUT

mA

1000

1280

1550

ILIM

N-Channel MOSFET

Current Limit

550

750

950

MAX1705

MAX1706

250

435

550

FBLDO = LDO, ILOAD = 1mA

V

1.238

1.250

1.262

FBLDO Regulation Voltage

VFBLDO = 1.5V

nA

0.01

50

FBLDO Input Current

FBLDO = GND

mA

220

300

500

Short-Circuit Current Limit

VFBLDO = 1V, ILDO = 200mA

Ω

0.5

1.2

Dropout Resistance

10µA < ILDO < 200mA, FBLDO = LDO

%

0.4

1.2

Load Regulation

2.5V < VOUT < 5.5V, FBLDO = LDO,

ILDO = 1mA

%

0.1

0.5

Line Regulation

P-channel, ILX = 100mA

0.27

0.50

N-channel, ILX = 100mA

Ω

0.23

0.45

Switch On-Resistance

0.16

0.28

CLK/SEL = GND

CLK/SEL = OUT

VLX = 0V, V ONB = VOUT = 5.5V

µA

0.1

20

LX Leakage Current

V

1.25

5.0

LDO Adjust Range

CONTROL INPUTS

LOW-BATTERY COMPARATOR

LINEAR REGULATOR

DC-DC SWITCHES

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