MAX1705EEE datasheet(5/20 Pages) MAXIM

5 / 20 page

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

Step-Up DC-DC Converters with Linear Regulator

_______________________________________________________________________________________

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 = -40°C to +85°C, unless otherwise noted, Note 4.)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

LBN, LBP Common-Mode

Input Range

0.5

1.5

CONDITIONS

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

be within this range)

LBO High Leakage

µA

LBO = OUT = 5V

Input Low Level

0.15VOUT

1.2V < VOUT < 5.5V, ONA, ONB (Note 2)

0.85VOUT

1.2V < VOUT < 5.5V, ONA, ONB (Note 2)

Internal Oscillator Frequency

260

340

kHz

CLK/SEL = OUT

External Oscillator

Synchronization Range

200

400

kHz

0.85VOUT

VOUT = 5.5V, CLK/SEL, TRACK

Note 1: Once the output is in regulation, the MAX1705/MAX1706 operate down to a 0.7V input voltage.

Note 2: The device is in start-up mode when VOUT is below this value (see Low-Voltage Start-Up Oscillator section).

Note 3: ONA and ONB inputs have a hysteresis of approximately 0.15VOUT.

Note 4: Specifications to -40°C to are guaranteed by design, not production tested.

Input High Level

VOUT = 2.5V, CLK/SEL, TRACK

0.15VOUT

LBN, LBP Offset

-5

LBP falling

FBLDO Regulation Voltage

1.233

1.268

FBLDO = LDO, ILOAD = 1mA

Short-Circuit Current Limit

220

600

FBLDO = LDO = GND

FBLDO Input Current

0.01

VFBLDO = 1.5V

Dropout Resistance

1.2

Ω

VFBLDO = 1V, ILDO = 200mA

LINEAR REGULATOR

CONTROL INPUTS

LOW-BATTERY COMPARATOR

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