Datasheet

LTC3219
4
3219fa
TYPICAL PERFORMANCE CHARACTERISTICS
Mode Switch Dropout Times
V
CPO
1V/DIV
200μs/DIV
3219 G01
V
BAT
= 3.6V
1x
1.5x
2x
V
CPO
20mV/DIV
AC COUPLED
500ns/DIV
3219 G03
V
BAT
= 3.6V
I
CPO
= 100mA
C
CPO
= 2.2μF
1.5x Mode CPO Ripple 2x Mode CPO Ripple
1x Mode Switch Resistance vs
Temperature
1.5x Mode Charge Pump Open-Loop
Output Resistance vs Temperature
(1.5V
BAT
– V
CPO
)/I
CPO
TEMPERATURE (°C)
–40
SWITCH RESISTANCE (Ω)
1.00
1.10
1.20
60
3219 G04
0.90
0.80
0.95
1.05
1.15
0.85
0.75
0.70
–15
10
35
85
I
CPO
= 100mA
V
BAT
= 3.3V
V
BAT
= 3.9V
V
BAT
= 3.6V
TEMPERATURE (°C)
–40
OPEN-LOOP OUTPUT RESISTANCE (Ω)
5.50
6.00
6.50
60
3219 G05
5.00
4.50
5.25
5.75
6.25
4.75
4.25
4.00
–15
10
35
85
V
BAT
= 3V
V
CPO
= 4.2V
C2 = C3 = 1μF
C4 = 2.2μF
1.5x Mode CPO Voltage
vs I
CPO
I
CPO
(mA)
0
3.6
CPO VOLTAGE (V)
3.8
4.0
4.2
4.4
4.6
4.8
50 100 150 200
3219 G06
250
C4 = 2.2μF
C2 = C3 = 1μF
V
BAT
= 3.6V
3.5V
3.0V
3.3V
3.2V
3.1V
3.4V
2x Mode Charge Pump Open-Loop
Output Resistance vs Temperature
(2V
BAT
– V
CPO
)/I
CPO
2x Mode CPO Voltage
vs I
CPO
TEMPERATURE (°C)
–40
OPEN-LOOP OUTPUT RESISTANCE (Ω)
6.50
7.00
7.50
60
3219 G07
6.00
5.50
6.25
6.75
7.25
5.75
5.25
5.00
–15
10
35
85
V
BAT
= 3V
V
CPO
= 4.8V
C2 = C3 = 1μF
C4 = 2.2μF
I
CPO
(mA)
0
4.2
CPO VOLTAGE (V)
4.4
4.6
4.8
50
100
150 200
3219 G08
250
5.0
5.2
4.3
4.5
4.7
4.9
5.1
300
C4 = 2.2μF
C2 = C3 = 1μF
V
BAT
= 3.6V
3.0V
3.3V
3.2V
3.1V
3.5V
3.4V
Oscillator Frequency
vs V
BAT
Voltage
V
BAT
VOLTAGE (V)
2.7
775
FREQUENCY (kHz)
800
825
850
875
3.1 3.5 3.9 4.3
3219 G09
4.7 5.1 5.5
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
T
A
= 25°C unless otherwise noted.
V
CPO
20mV/DIV
AC COUPLED
500ns/DIV
3219 G02
V
BAT
= 3.6V
I
CPO
= 100mA
C
CPO
= 2.2μF