MAX1705EEE datasheet(2/20 Pages) MAXIM

2 / 20 page

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

Step-Up DC-DC Converters with Linear Regulator

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(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.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ONA, ONB, FBLDO, OUT, POUT to GND...................-0.3V to 6V

PGND to GND.....................................................................±0.3V

POUT to OUT ......................................................................±0.3V

LX to PGND ............................................-0.3V to (VPOUT + 0.3V)

CLK/SEL, REF, FB, TRACK, LDO,

LBN, LBP, LBO to GND.......................-0.3V to (VOUT + 0.3V)

LDO Short Circuit .......................................................Continuous

Continuous Power Dissipation (TA = +70°C)

QSOP (derate 8.70mW/°C above +70°C) ...................696mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10sec) .............................+300°C

CLK/SEL = OUT

-1µA < IREF < 50µA

(Note 1)

IREF = 0µA

CLK/SEL = GND, VFB = VFBLDO = 1.5V,

no load

ONA = GND, ONB = OUT, measure IOUT

(Note 2)

VPOUT = VOUT = 1.5V

VFB = 1.5V

MAX1705, 0A

≤ ILX ≤ 0.5A;

MAX1706, 0A

≤ ILX ≤ 0.25A;

CLK/SEL = OUT

TRACK = VLDO > 2.3V

CLK/SEL = OUT

CONDITIONS

Reference Load Regulation

1.238

1.250

1.262

Reference Output Voltage

µA

180

360

IOUT

Supply Current in

Low-Noise Mode

1.219

1.233

1.247

FB Regulation Voltage

0.7

Minimum Operating Battery

Voltage

µA

100

190

IOUT

Supply Current in

Low-Power Mode

µA

IOUT

Supply Current in Shutdown

2.00

2.15

2.30

Start-Up to Normal Mode

Transition Voltage

kHz

150

300

fLX

Frequency in Start-Up Mode

0.01

FB Input Current

2.5

5.5

OUT Adjust Range

0.65

1.25

Load Regulation

VLDO

+ 0.2

+ 0.3

+ 0.4

OUT Voltage in Track Mode

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

TA = +25°C, ILOAD < 1mA, Figure 2

0.9

1.1

Minimum Start-Up Voltage

2.5V < VOUT < 5.5V

0.2

Reference Supply Regulation

DC-DC CONVERTER

REFERENCE

VFB = VFBLDO = 1.5V, no load

FB = GND (LX switching)

2.1

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