MAX1700EEE datasheet(5/16 Pages) MAXIM

Part #	MAX1700EEE

Description	1-Cell to 3-Cell, High-Power 1A, Low-Noise, Step-Up DC-DC Converters

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Manufacturer	MAXIM [Maxim Integrated Products]

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Input High Voltage (Note 7)

1-Cell to 3-Cell, High-Power (1A),

Low-Noise, Step-Up DC-DC Converters

_______________________________________________________________________________________

5

Note 1: Operating voltage. Since the regulator is bootstrapped to the output, once started it will operate down to 0.7V input.

Note 2: Start-up is tested with the circuit of Figure 2.

Note 3: In low-power mode (CLK/SEL = GND), the output voltage regulates 1% higher than low-noise mode (CLK/SEL = OUT or

synchronized).

Note 4: The regulator is in start-up mode until this voltage is reached. Do not apply full load current.

Note 5: Load regulation is measured from no-load to full load where full load is determined by the N-channel switch current limit.

Note 6: Supply current from the 3.30V output is measured between the 3.30V output and the OUT pin. This current correlates

directly to the actual battery supply current, but is reduced in value according to the step-up ratio and efficiency. Set VOUT

= 3.6V to keep the internal switch open when measuring the current into the device.

Note 7: ONA and ONB have hysteresis of approximately 0.15xVOUT.

Note 8: Specifications to -40°C are guaranteed by design and not production tested.

ELECTRICAL CHARACTERISTICS (continued)

(CLK/SEL = ONA = ONB = FB = PGND = GND, OUT = POUT, VOUT = 3.6V, MAX1701: AIN = LBN = GND, LBP = REF,

TA = -40°C to +85°C, unless otherwise noted.) (Note 8)

CONDITIONS

2.5V < VOUT < 5.5V, CLK/SEL

1.2V < VOUT < 5.5V, ONA and ONB

0.2VOUT

V

0.2VOUT

Input Low Voltage (Note 7)

1.2V < VOUT < 5.5V, ONA and ONB

0.8VOUT

Input High Voltage (Note 7)

ONA, ONB, and CLK/SEL

2.5V < VOUT < 5.5V, CLK/SEL

µA

-1

1

Logic Input Current

V

0.8VOUT

CLK/SEL = OUT

kHz

260

340

Internal Oscillator Frequency

UNITS

MIN

TYP

MAX

PARAMETER

%

80

92

Oscillator Maximum Duty Cycle

kHz

200

400

External Clock Frequency

Range

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

100

90

40

0.1

1

10

100

1000

EFFICIENCY vs. LOAD CURRENT

(VOUT = 3.3V)

50

LOAD CURRENT (mA)

60

70

80

PFM

PWM

VIN = 0.9V

VIN = 1.2V

VIN = 2.4V

100

90

40

30

0.1

1

10

100

1000

EFFICIENCY vs. LOAD CURRENT

(VOUT = 5V)

50

LOAD CURRENT (mA)

60

70

80

VIN = 1.2V

VIN = 2.4V

VIN = 3.6V

PFM

PWM

0

2.0

1.0

4.0

3.0

6.0

5.0

7.0

02

3

1

456

MAX1701

SHUTDOWN CURRENT

vs. INPUT VOLTAGE (V)

INPUT VOLTAGE (V)

T = 85°C

T = 25°C

T = -40°C

LOGIC AND CONTROL INPUTS

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