MAX1706CSLASHD datasheet(8/20 Pages) MAXIM

8 / 20 page

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

Step-Up DC-DC Converters with Linear Regulator

_______________________________________________________________________________________

____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 2, TA = +25°C, unless otherwise noted.)

200

µs/div

MAX1705

LINE-TRANSIENT RESPONSE

IOUT = 0mA, VOUT = 3.3V

A = VIN, 1.5V TO 2.0V, 200mV/div

B = VOUT, 10mV/div, 3.3V DC OFFSET

200

µs/div

MAX1705

POWER-ON DELAY

(PWM MODE)

VIN = 1.2V, LOAD = 1kΩ

A = ONA, 2V/div

B = VLDO, 2V/div

C = VOUT, 2V/div

D = INDUCTOR CURRENT, 500mA/div

2.5V

3.3V

0mA

µs/div

MAX1705

PWM SWITCHING WAVEFORMS

VIN = 1.2V, VOUT = 4.5V, VLDO = 3.3V, ILDO = 200mA

A = INDUCTOR CURRENT, 500mA/div

B = LX VOLTAGE, 5V/div

C = VOUT RIPPLE, 50m/div AC COUPLED

D = VLDO RIPPLE, 5m/div AC COUPLED

C5 = 0.33

µF

VOUT

VLDO

µs/div

MAX1705

PFM SWITCHING WAVEFORMS

VIN = 1.2V, VOUT = 4.5V, VLDO = 3.3V, ILDO = 40mA

A = INDUCTOR CURRENT, 500mA/div

B = LX VOLTAGE, 5V/div

C = VOUT RIPPLE, 50mV/div AC COUPLED

D = VLDO RIPPLE, 5mV/div AC COUPLED

C5 = 0.33

µF

0mA

VOUT

VLDO

1ms/div

MAX1705

LINEAR-REGULATOR

OUTPUT NOISE

VLDO IS AC COUPLED, 1mv/div

ILDO = 200mA

C5 = 0.33

µF

VLDO

DC TO 500kHz

200

µs/div

MAX1705

LOAD-TRANSIENT RESPONSE

VIN = 1.2V, VOUT = 3.3V

A = VOUT, 50mV/div, 3.3V DC OFFSET

B = IOUT, 0mA TO 200mA, 200mA/div

MAX1706C/D Datasheet(PDF) 8 Page - Maxim Integrated Products

MAX1706C/D Datasheet(HTML) 8 Page - Maxim Integrated Products

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