MAX8819A MAXIM [Maxim Integrated Products], MAX8819A Datasheet - Page 12

• Manufacturer Part Number: MAX8819A
• Description: PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN
• Manufacturer: MAXIM [Maxim Integrated Products]

PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
(Circuit of Figure 1, T
12
100
90
80
70
60
50
40
30
20
10
0
______________________________________________________________________________________
0
V
V
OVP4
vs. LED CURRENT (4 LEDS)
I
EN4
LED
5
LED EFFICIENCY
100
LED CURRENT (mA)
95
90
85
80
75
70
65
60
55
50
REG4 STARTUP AND SHUTDOWN
10
2.5
A
= +25°C, unless otherwise noted.)
I
INDUCTOR: TOKO 1096AS-100M
DIODE: NXP PMEG3005EB
LED EFFICIENCY vs. SYS VOLTAGE
LED
3.0
= 25mA
15
V
RESPONSE
SYS
2ms/div
3.5
SYS VOLTAGE (V)
= 3.6V
20
6 LEDS
4.0
25
4 LEDS
4.5
MAX8819A toc33
5.0
100
Typical Operating Characteristics (continued)
95
90
85
80
75
70
65
60
55
50
2V/div
10V/div
0V
10mA/div
0mA
2.5
5.5
I
6 LEDS
INDUCTOR: TOKO 1096AS-100M
DIODE: NXP PMEG3005EB
LED
LED AND BOOST EFFICIENCY
= 25mA
3.0
vs. SYS VOLTAGE
BOOST
3.5
SYS VOLTAGE (V)
4.0
LED
4.5
500
450
400
350
300
250
200
150
100
50
0
0
5.0
100
90
80
70
60
50
40
30
20
10
0
FB4 VOLTAGE vs. LED CURRENT
0
5.5
5
LED CURRENT (mA)
vs. LED CURRENT (6 LEDS)
5
10
LED EFFICIENCY
LED CURRENT (mA)
300
250
200
150
100
50
0
10
2.5
15
6 LEDS, I
3.0
15
V
20
SYS
REG4 INPUT CURRENT
LED
vs. SYS VOLTAGE
= 3.6V
= 25mA
3.5
SYS VOLTAGE (V)
20
25
4.0
25
4.5
5.0
5.5