MAX1642CSLASHD datasheet(5/12 Pages) MAXIM

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High-Efficiency, Step-Up

DC-DC Converters for 1V Inputs

_______________________________________________________________________________________

____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 4, VBATT = 1.2V, R1 + R2 = 1MΩ, TA = +25°C, unless otherwise noted.)

LOAD-TRANSIENT RESPONSE

400µs/div

VOUT = 3.3V, VBATT = 1.2V

A: OUT, 20mV/div, 3.3V DC OFFSET

B: LOAD, 2mA to 20mA, 10mA/div

0.8

MAXIMUM OUTPUT CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

1.4

0.9

1.3

1.2

1.5

1.6

1.0

1.1

L1 = 100

µH

SUMIDA CD54-101

VOUT = 5V

VOUT = 3.3V

VOUT = 2.4V

0.8

MAXIMUM OUTPUT CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

1.4

0.9

1.3

1.2

1.5

1.6

1.0

1.1

L1 = 150

µH

TDK NLC565050T-151K

VOUT = 5V

VOUT = 3.3V

VOUT = 2.4V

SWITCHING WAVEFORMS

10ms/div

VOUT = 3.3V, VIN = 1.2V, IOUT = 12mA

A: LX, 2V/div, L1 = TDK NLC565050T-151K

B: OUT, 20mV/div, 3.3V DC OFFSET

C: INDUCTOR CURRENT, 100mA/div

LINE-TRANSIENT RESPONSE

400µs/div

VOUT = 3.3V, LOAD = 15mA

A: OUT, 50mV/div, 3.3V DC OFFSET

B: VBATT, 1V to 1.5V, 500mV/div

SHUTDOWN RESPONSE AND

INDUCTOR CURRENT

10ms/div

VOUT = 3.3V, VBATT = 1.2V, IOUT = 5mA

A: OUT, 1V/div

B: INDUCTOR CURRENT, 200mA/div

C: SHDN, 2V/div

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