Datasheet

LTC3204-3.3/LTC3204-5/
LTC3204B-3.3/LTC3204B-5
4
3204fa
SUPPLY VOLTAGE (V)
1.8
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
2.2
2.6
2.8
2.0
2.4
3.0
3.2
TEMPERATURE (°C)
–50
0
50
100
6
7
5
9
3204 G09
V
IN
= 1.8V
V
OUT
= 3V
3204 G12
3204 G143204 G13
3204 G15
3204 G07
SUPPLY VOLTAGE (V)
LOAD CURRENT (mA)
400
350
300
250
200
150
100
50
0
3204 G08
1.5
2.0
2.5 3.0 3.5
8
I
OUT
= 1mA
THEORETICAL MAX
I
OUT
= 30mA
LOAD CURRENT (mA)
0
OUTPUT VOLTAGE (V)
3.35
3.30
3.25
3.20
3.15
3.10
3.05
100 200 300 400 500
V
IN
= 1.8V
V
IN
= 2.4V
V
IN
= 3.2V
V
OUT
= 3.168V
T
A
= 25°C
T
A
= 90°C
T
A
= –45°C
SUPPLY VOLTAGE (V)
1.8
44
NO-LOAD INPUT CURRENT (µA)
NO-LOAD INPUT CURRENT (mA)
46
50
52
54
64
58
2.2
2.6
2.8
3204 G10
48
60
62
56
0
0.2
0.6
0.8
1.0
2.0
1.4
0.4
1.6
1.8
1.2
2
2.4
3
3.2
LTC3204B-3.3
LTC3204-3.3
LOAD CURRENT (mA)
0.01
0.1
EXCESS INPUT CURRENT (mA)
1
0.01 0.1 1 10 100
3204 G11
10
1000
LTC3204B-3.3
(NON-BURST MODE
OPERATION)
LTC3204-3.3
(BURST MODE
OPERATION)
V
IN
= 2.4V
V
OUT
Soft-Start Response Output Ripple
Load Transient Response
No-Load Input Current vs
Supply Voltage
Extra Input Current vs Load Current
(I
IN
-2I
LOAD
)
Effective Open-Loop Output
Resistance vs Temperature
(T
A
= 25°C, C
FLY
= C
IN
= C
OUT
= 2.2µF unless otherwise specified)
Load Regulation
Output Load Capability at 4%
Below Regulation
(LTC3204-3.3/LTC3204B-3.3 ONLY)
V
OUT
20mV/DIV
(AC COUPLED)
I
OUT
50mA
30mA
10µs/DIV
V
OUT
2V/DIV

S

H

D

N
2V/DIV
500µs/DIV
V
OUT
20mV/DIV
(AC COUPLED)
500ns/DIV
V
IN
= 2.4V
I
LOAD
= 50mA
V
IN
= 2.4V
I
LOAD
= 50mA
V
IN
= 2.4V
I
OUT
= 30mA TO 50mA STEP
3204 G13 3204 G14 3204 G15
Efficiency vs Supply Voltage
TYPICAL PERFOR A CE CHARACTERISTICS
U W