LTC3400/LTC3400B
TYPICAL PERFOR A CE CHARACTERISTICS
Output Load Burst Mode Threshold
vs V
IN
L = 4.7µH
T
A
= 25°C
OUTPUT CURRENT (mA)
20
V
OUT
= 3.3V
V
OUT
= 5V
3.32
V
OUT
(V)
3.30
3.28
3.26
3.36
3.34
START-UP VOLTAGE (V)
10
0
0.9
1.5
2.1
2.7
V
IN
(V)
3.3
3.9
4.5
3400 G01
No Load Battery Current vs V
BATT
1000
V
OUT
= 3.3V
T
A
= 25°C
NORMALIZED FREQUENCY
BATTERY CURRENT (µA)
100
10
0.9
1.2
1.5 1.8 2.1 2.4
BATTERY VOLTAGE (V)
SW Pin Fixed Frequency,
Continuous Inductor Current
Operation
V
SW
1V/DIV
0V
V
IN
= 1.3V
V
OUT
= 3.3V
I
OUT
= 50mA
L = 6.8µH
C
OUT
= 4.7µF
100ns/DIV
3400 G07
U W
2.7
3400 G04
V
OUT
vs Temperature
FIGURE 1 CIRCUIT
I
O
= 10mA
1.4
1.3
1.2
1.1
1.0
0.9
0.8
–30
0
30
60
TEMPERATURE (°C)
90
120
3400 G02
Minimum Start-Up Voltage
vs Load Current
T
A
= 25°C
3.24
–60
0.1
1
10
I
OUT
(mA) CURRENT SOURCE LOAD
100
3400 G03
Normalized Oscillator Frequency
vs Temperature
1.01
1.00
0.99
0.98
0.97
0.96
0.95
–50 –30
SW Pin Antiringing Operation
V
SW
1V/DIV
0V
V
IN
= 1.3V
V
OUT
= 3.3V
I
OUT
= 10mA
L = 6.8µH
C
OUT
= 4.7µF
100ns/DIV
3400 G06
3.0
30
50
–10 10
TEMPERATURE (°C)
70
90
3400 G05
Fixed Frequency and Burst Mode
Operation
V
OUT
Transient Response
V
OUT(AC)
100mV/DIV
60mA
10µA
10ms/DIV
V
IN
= 1.3V
V
OUT
= 3.3V
I
OUT
= 60mA TO 10µA
L = 6.8µH
C
OUT
= 4.7µF
3400 G08
V
OUT(AC)
100mV/DIV
100mA
I
OUT
40mA
100µs/DIV
V
IN
= 1.3V
V
OUT
= 3.3V
I
OUT
= 40mA TO 100mA
L = 6.8µH
C
OUT
= 4.7µF
3400 G09
I
OUT
3400fa
3
LINER [ LINEAR TECHNOLOGY ]
