Datasheet

LTC3260
3
3260fa
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= EN
+
= EN
–
= 12V, MODE = 0V, RT = 200kΩ.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Charge Pump
V
IN
Input Voltage Range
l
4.5 32 V
V
UVLO
V
IN
Undervoltage Lockout Threshold V
IN
Rising
V
IN
Falling
l
l
3.4
3.8
3.6
4 V
V
I
VIN
V
IN
Quiescent Current Shutdown, EN
+
= EN
–
= 0V
EN
–
= 0V, I
LDO
+
= 0mA
MODE = V
IN
, EN
+
= 0V, I
VOUT
= I
LDO
–
= 0mA
MODE = V
IN
, I
VOUT
= I
LDO
+
= I
LDO
–
= 0mA
MODE = 0V, I
VOUT
= 0mA
2
30
80
100
3.5
5
50
160
200
5.5
µA
µA
µA
µA
mA
V
RT
RT Regulation Voltage 1.200 V
V
OUT
V
OUT
Regulation Voltage MODE = 12V
MODE = 0V
–0.94 • V
IN
–V
IN
V
V
f
OSC
Oscillator Frequency RT = GND 450 500 550 kHz
R
OUT
Charge Pump Output Impedance MODE = 0V, RT = GND 32 Ω
I
SHORT_CKT
Max I
VOUT
Short-Circuit Current V
OUT
= GND
l
100 160 250 mA
V
MODE(H)
MODE Threshold Rising
l
1.1 2.0 V
V
MODE(L)
MODE Threshold Falling
l
0.4 1.0 V
I
MODE
MODE Pin Internal Pull-Down Current V
IN
= MODE = 32V 0.7 µA
50mA Positive Regulator
LDO
+
Output Voltage Range
l
1.2 32 V
V
ADJ
+
ADJ
+
Reference Voltage
l
1.176 1.200 1.224 V
I
ADJ
+
ADJ+ Input Current V
ADJ
+
= 1.2V –50 50 nA
I
LDO
+
(SC)
LDO
+
Short-Circuit Current
l
50 100 mA
Line Regulation 0.04 mV/V
Load Regulation 0.03 mV/mA
V
DROPOUT
+
LDO
+
Dropout Voltage I
LDO
+
= 50mA 400 800 mV
Output Voltage Noise C
BYP
+
= 10nF 100 µV
RMS
V
EN
+
(H)
EN
+
Threshold Rising
l
1.1 2.0 V
V
EN
+
(L)
EN
+
Threshold Falling
l
0.4 1.0 V
I
EN
+
EN
+
Pin Internal Pull-Down Current V
IN
= EN
+
= 32V 0.7 µA
50mA Negative Regulator
LDO
–
Output Voltage Range
l
–32 –1.2 V
V
ADJ
–
ADJ
–
Reference Voltage
l
–1.224 –1.200 –1.176 V
I
ADJ
–
ADJ
–
Input Current V
ADJ
–
= –1.2V –50 50 nA
I
LDO
–
(SC)
LDO
–
Short-Circuit Current
l
50 100 mA
Line Regulation 0.002 mV/V
Load Regulation 0.02 mV/mA
V
DROPOUT
–
LDO
–
Dropout Voltage I
LDO
–
= 50mA 200 500 mV
Output Voltage Noise C
BYP
–
= 10nF 100 µV
RMS
V
EN(H)
EN
–
Threshold Rising
l
1.1 2.0 V
V
EN(L)
EN
–
Threshold Falling
l
0.4 1.0 V
I
EN
–
EN
–
Pin Internal Pull-Down Current V
IN
= EN
–
= 32V 1.4 µA