Datasheet

MAX8630W/MAX8630X
125mA 1x/1.5x Charge Pumps for 5 White LEDs
in 3mm x 3mm TDFN
4 _______________________________________________________________________________________
INPUT CURRENT vs. INPUT VOLTAGE
DRIVING 2 SUB LEDs
MAX8630W/X toc04
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
3.93.63.0 3.3
20
40
60
80
120
100
140
160
0
2.7 4.2
I
LED
= 8.125mA
I
LED
= 1.875mA
I
LED
= 20mA
V
IN
FALLING
INPUT RIPPLE VOLTAGE vs. SUPPLY
VOLTAGE DRIVING 5 WHITE LEDs
MAX8630W/X toc05
INPUT VOLTAGE (V)
INPUT RIPPLE VOLTAGE (mV
P-P
)
3.73.2
20
40
60
80
100
120
140
0
2.7 4.2
20mA/LED
15mA/LED
8mA/LED
2mA/LED
LED CURRENT MATCHING vs. INPUT
VOLTAGE (25mA/LED)
MAX8630W/X toc06
INPUT VOLTAGE (V)
LED CURRENT (mA)
5.14.73.1 3.5 3.9 4.3
21
22
23
24
25
26
27
28
20
2.7 5.5
LED CURRENT MATCHING vs. INPUT
VOLTAGE (2.5mA/LED)
MAX8630W/X toc07
INPUT VOLTAGE (V)
LED CURRENT (mA)
5.14.73.1 3.5 3.9 4.3
2.10
2.20
2.30
2.40
2.50
2.60
2.70
2.80
2.00
2.7 5.5
OUTPUT CURRENT vs. TEMPERATURE
(5 LEDs AT 25mA EACH)
MAX8630W/X toc08
TEMPERATURE (°C)
OUTPUT CURRENT (mA)
603510-15
20
40
60
80
100
120
140
0
-40 85
TEMPERATURE
DERATING
1x MODE OPERATING WAVEFORMS
(V
IN
= 4.0V)
MAX8630W/X toc09
1μs/div
200mV/div
(AC-COUPLED)
200mV/div
(AC-COUPLED)
100mA/div
V
OUT
V
IN
I
IN
1.5x MODE OPERATING WAVEFORMS
(V
IN
= 3.6V)
MAX8630W/X toc10
1μs/div
200mV/div
(AC-COUPLED)
200mV/div
(AC-COUPLED)
100mA/div
V
OUT
V
IN
I
IN
Typical Operating Characteristics (continued)
(V
IN
= 3.6V, ENM = ENS = IN, T
A
= +25°C, unless otherwise noted.)