Datasheet

LTC3219
5
3219fa
V
BAT
Shutdown Current
vs V
BAT
Voltage
1x Mode No Load V
BAT
Current vs
V
BAT
Voltage
V
BAT
VOLTAGE (V)
2.9
V
BAT
SHUTDOWN CURRENT (μA)
3.5
5.5
4.5
6.5
4.9
3219 G10
2.5
1.5
3.3
3.7
5.3
7.5
4.54.1
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
V
BAT
VOLTAGE (V)
2.7
V
BAT
CURRENT (μA)
405
415
425
5.1
3219 G11
395
385
400
410
420
390
380
375
3.33.0
3.93.6
4.5 4.8 5.4
4.2
1.5x Mode V
BAT
Current vs I
CPO
(I
VBAT
– 1.5I
CPO
)
I
CPO
(mA)
0
0
V
BAT
CURRENT (mA)
2
4
6
8
10
50
100 150 200
3219 G12
250 300
2x Mode V
BAT
Current vs I
CPO
(I
VBAT
– 2I
CPO
)
ULED Pin Current
vs ULED Pin Voltage
ULED Pin Current vs Input Code
ULED PIN VOLTAGE (V)
0
0
ULED PIN CURRENT (mA)
5
15
20
25
35
3219 G14
10
30
0.12
0.30
0.06
0.18 0.24
V
BAT
= 3.6V
INPUT CODE (HEX)
1
ULED PIN CURRENT (mA)
15
20
25
30
25
3219 G15
10
5
0
0A
13
1C
2E
37 3F
ULED Pin Dropout Voltage
vs ULED Pin Current
9-LED ULED Display Effi ciency vs
V
BAT
Voltage
ULED PIN CURRENT (mA)
04
0
ULED PIN DROPOUT VOLTAGE (mV)
80
20O
8
16
20
3219 G16
40
160
120
12
24
28
V
BAT
= 3.6V
V
BAT
VOLTAGE (V)
3.0
EFFICIENCY (PLED/PIN) (%)
60
80
100
5.0
3219 G17
40
20
50
70
90
30
10
0
3.5 4.0 4.5 5.5
9 LEDs AT 15mA/LED
(TYP V
F
AT 15mA = 3.2V
NICHIA NSCW100)
T
A
= 25°C
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C unless otherwise noted.
I
CPO
(mA)
0
0
V
BAT
CURRENT (mA)
2
4
6
8
10
50
100 150 200
3219 G13
250 300
V
BAT
= 3.6V