Datasheet

LTC3400/LTC3400B
3
3400fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Output Load Burst Mode Threshold
vs V
IN
V
IN
(V)
0.9
0
OUTPUT CURRENT (mA)
1.5 2.1 2.7 3.3
3400 G01
3.9 4.5
20
10
V
OUT
= 3.3V V
OUT
= 5V
L = 4.7µH
T
A
= 25°C
TEMPERATURE (°C)
–60
3.24
V
OUT
(V)
3.26
3.28
3.30
3.32
3.36
–30
03060
3400 G02
90 120
3.34
FIGURE 1 CIRCUIT
I
O
= 10mA
I
OUT
(mA) CURRENT SOURCE LOAD
0.1
0.8
START-UP VOLTAGE (V)
1.2
1.3
1.4
1 10 100
3400 G03
1.1
1.0
0.9
T
A
= 25°C
V
OUT
vs Temperature
Minimum Start-Up Voltage
vs Load Current
No Load Battery Current vs V
BATT
BATTERY VOLTAGE (V)
1.2
10
100
1000
1.8
3400 G04
BATTERY CURRENT (µA)
0.9
3.01.5
2.1 2.4 2.7
V
OUT
= 3.3V
T
A
= 25°C
SW Pin Fixed Frequency,
Continuous Inductor Current
Operation
TEMPERATURE (°C)
–50
NORMALIZED FREQUENCY
0.99
1.00
1.01
10 50
3400 G05
0.98
0.97
–30 –10
30 70 90
0.96
0.95
SW Pin Antiringing Operation
Fixed Frequency and Burst Mode
Operation V
OUT
Transient Response
Normalized Oscillator Frequency
vs Temperature
V
SW
1V/DIV
0V
V
IN
= 1.3V 100ns/DIV 3400 G06
V
OUT
= 3.3V
I
OUT
= 10mA
L = 6.8µH
C
OUT
= 4.7µF
V
SW
1V/DIV
0V
V
IN
= 1.3V 100ns/DIV 3400 G07
V
OUT
= 3.3V
I
OUT
= 50mA
L = 6.8µH
C
OUT
= 4.7µF
V
OUT(AC)
100mV/DIV
60mA
V
IN
= 1.3V 10ms/DIV 3400 G08
V
OUT
= 3.3V
I
OUT
= 60mA TO 10µA
L = 6.8µH
C
OUT
= 4.7µF
10µA
I
OUT
V
OUT(AC)
100mV/DIV
100mA
V
IN
= 1.3V 100µs/DIV 3400 G09
V
OUT
= 3.3V
I
OUT
= 40mA TO 100mA
L = 6.8µH
C
OUT
= 4.7µF
40mA
I
OUT