MAX1573 Maxim Integrated Products, MAX1573 Datasheet - Page 3

• Manufacturer Part Number: MAX1573
• Description: White LED 1x/1.5x Charge Pump
• Manufacturer: Maxim Integrated Products

(V
IN
100
30
25
20
15
10
90
80
70
60
50
9
8
7
6
5
4
3
2
1
0
5
0
= 3.6V, EN1 = EN2 = IN, C
3.0
5
4.2
FULL
1/10
INPUT RIPPLE vs. SUPPLY VOLTAGE
3/10
Li+ BATTERY VOLTAGE, TIME-WEIGHTED (V)
6
3.9
3.2
vs. Li+ BATTERY DISCHARGE
3/10
EFFICIENCY (P
7
LED CURRENT vs. R
FULL
3/10
3.8
SUPPLY VOLTAGE (V)
8
3.4
1/10
White LED 1x/1.5x Charge Pump in UCSP
9
R
_______________________________________________________________________________________
SET
3.7
1/10
3.6
10 11 12 13 14 15
(kΩ)
LEDs
3.6
3.8
FULL
/P
SET
BATT
IN
3.5 3.4 3.0
4.0
= C1 = C2 = C
)
4.2
V
100
OUT
V
OUT
20
19
18
17
16
15
14
13
12
11
10
90
80
70
60
50
I
IN
IN
3.0
2.0
= 1µF, R
LED CURRENT vs. SUPPLY VOLTAGE
TYPICAL OPERATING WAVEFORMS
2.5
1/10
3.2
EFFICIENCY (P
vs. SUPPLY VOLTAGE
3.0
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SET
3/10
3.4
IN 1x MODE
LED3
3.5
500ns/div
= 7.50kΩ, T
3.6V Li+ BATTERY INPUT
LED4
3.6
LEDs
FULL
4.0
Typical Operating Characteristics
3.8
/P
LED1
4.5
LED2
BATT
A
MAX1573 toc08
4.0
)
5.0
= +25°C, unless otherwise noted.)
5.5
4.2
20mV/
div
10mA/
div
20mV/
div
17.5
17.4
17.3
17.2
17.1
17.0
16.9
16.8
16.7
16.6
16.5
V
120
100
OUT
80
60
40
20
V
I
0
IN
IN
-40
3.0
-30
TYPICAL OPERATING WAVEFORMS
LED CURRENT vs. TEMPERATURE
-20 -10
3.2
1/10
vs. SUPPLY VOLTAGE
SUPPLY CURRENT
SUPPLY VOLTAGE (V)
3.4
TEMPERATURE (°C)
0 10 20 30 40 50 60 70 80
3/10
IN 1.5x MODE
www.DataSheet4U.com
500ns/div
3.6
3.4V Li+ BATTERY INPUT
FULL
3.8
4.0
MAX1573 toc09
4.2
20mV/
div
10mA/
div
20mV/
div
3