Datasheet

LTC3260
5
3260fa
Typical perForMance characTerisTics
LDO
+
GND Pin Current vs I
LOAD
LDO
+
Load Regulation
ADJ
+
Pin Voltage vs Temperature
Effective Open-Loop Resistance
vs Supply Voltage
LDO
+
Dropout Voltage
vs Temperature
LDO
+
Supply Rejection
Effective Open-Loop Resistance
vs Temperature
V
OUT
Short-Circuit Current
vs Supply Voltage
Voltage Loss (V
IN
– |V
OUT
|)
vs Output Current (Constant
Frequency Mode)
(T
A
= 25°C, C
F LY
= 1µF, C
IN
= C
OUT
= C
LDO
+
= C
LDO
–
= 10µF unless otherwise noted)
SUPPLY VOLTAGE (V)
0 5
0
V
OUT
SHORT-CIRCUIT CURRENT (mA)
100
250
10
20
25
3260 G08
50
200
150
15
30
35
R
T
= GND
R
T
= 200kΩ
OUTPUT CURRENT (mA)
0.1
0
VOLTAGE LOSS (V)
2.0
2.5
3.0
f
OSC
= 50kHz
f
OSC
= 200kHz
f
OSC
= 500kHz
1 10 100
3260 G09
1.5
1.0
0.5
V
IN
= 12V
TEMPERATURE (°C)
–50
ADJ
+
PIN VOLTAGE (V)
1.200
1.212
150
3260 G11
1.188
1.176
0
50
100
–25
25
75
125
1.224
I
LOAD
(mA)
0
0.08
GND PIN CURRENT (mA)
0.10
0.12
0.14
1 10 100
3260 G14
0.06
0.04
0.02
0
V
IN
= 12V
SUPPLY VOLTAGE (V)
0
0
EFFECTIVE OPEN-LOOP RESISTANCE (Ω)
10
30
40
50
20
90
3260 G10
20
10
5
25
15 3530
60
70
80
f
OSC
= 200kHz
f
OSC
= 500kHz
TEMPERATURE (°C)
–50
0
EFFECTIVE OPEN-LOOP RESISTANCE (Ω)
10
20
30
40
0 50
100
150
3620 G07
50
60
–25 25
75
125
V
IN
= 32V
V
IN
= 25V
V
IN
= 12V
f
OSC
= 500kHz
TEMPERATURE (°C)
–50
LDO
+
DROPOUT VOLTAGE (mV)
400
600
150
3260 G12
200
0
0
50
100
–25
25
75
125
800
V
IN
= 12V
I
LDO
+
= 50mA
300
500
100
700
FREQUENCY (kHz)
20
LDO
+
SUPPLY REJECTION (dB)
40
60
10
30
50
0.1 10 100 1000
3260 G13
0
1
V
IN
= 6.5V
V
LDO
+
= 5V
I
LDO
+
= 50mA
V
RIPPLE
= 50mV
RMS
C
LDO
+
= 10µF
I
LDO
+
(mA)
0.1
1.1994
V
LDO
+
(V)
1.2002
1.2004
1.2006
1 10 100
3260 G15
1.2000
1.1998
1.1996
V
IN
= 12V
UNITY GAIN