60mA 1.5x High-Efficiency White LED

Charge Pumps

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

noted.) (Note 1)

PARAMETER

CONDITIONS

MIN

MAX

UNITS

Output Leakage Current in Shutdown

10

µA

MAX1912

SET Regulation Point

0.19

0.21

V

SET Input Current

100

nA

SHDN Input Current

SHDN = 0 or 5.5V

1

µA

SHDN Input Voltage Low

0.4

V

SHDN Input Voltage High

1.6

V

Note 1: Limits to -40°C are guaranteed by design, not production tested.

Typical Operating Characteristics

20mV/div

INPUT AND OUTPUT VOLTAGE RIPPLE

MAX1912 DRIVING 4 LEDS (60mA)

1

µs/div

20mV/div

INPUT AND OUTPUT VOLTAGE RIPPLE

WITH ADDITIONAL INPUT FILTER

MAX1912 DRIVING 4 LEDS (60mA)

10

1

µs.div

4

3

2

1

0

03

12

456

QUIESCENT CURRENT vs.

INPUT VOLTAGE

5V/div

1V/div

50mA/div

STARTUP INPUT CURRENT AND

OUTPUT VOLTAGE

MAX1912/13 toc04

CIRCUIT OF FIGURE 2

R1 = R2 = R3 = 15

Ω

1ms/div

2V/div

100mV/div

15mA

45mA

INTENSITY CHANGE STEP RESPONSE

MAX1912/13 toc05

CIRCUIT OF FIGURE 10

50

µs/div