Datasheet

LT3055
3
3055f
For more information www.linear.com/LT3055
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage (Note 3, 11) I
LOAD
= 500mA
l
1.8 2.2 V
ADJ Pin Voltage (Note 3, 4) V
IN
= 2.2V, I
LOAD
= 1mA
2.2V < V
IN
< 45V, 1mA < I
LOAD
< 500mA
l
594
588
600 606
612
mV
mV
Line Regulation (Note 3)
∆V
IN
= 2.2V to 45V, I
LOAD
= 1mA
l
0.25 3 mV
Load Regulation (Note 3) V
IN
= 2.2V, I
LOAD
= 1mA to 500mA
l
0.5 4 mV
Dropout Voltage, V
IN
= V
OUT(NOMINAL)
(Notes 5, 6) I
LOAD
= 10mA
l
140 175
260
mV
mV
I
LOAD
= 50mA
l
200 250
370
mV
mV
I
LOAD
= 100mA
l
225 275
410
mV
mV
I
LOAD
= 500mA
l
350 400
590
mV
mV
GND Pin Current, V
IN
= V
OUT(NOMINAL)
+ 0.6V
(Notes 6, 7)
I
LOAD
= 0mA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 100mA
I
LOAD
= 500mA
l
l
l
l
l
65
100
270
1.8
11
130
200
550
4.5
25
μA
μA
μA
mA
mA
Quiescent Current in Shutdown V
IN
= 45V, V
SHDN
= 0V 0.2 1 μA
ADJ Pin Bias Current (Notes 3,12) V
IN
= 12V
l
16 60 nA
Output Voltage Noise C
OUT
= 10µF, I
LOAD
= 500mA, V
OUT
= 600mV,
BW = 10Hz to 100kHz
90 μV
RMS
C
OUT
= 10µF, C
BYP
= 10nF, I
LOAD
= 500mA,
V
OUT
= 600mV, BW = 10Hz to 100kHz
25 μV
RMS
Shutdown Threshold V
OUT
= Off to On
V
OUT
= On to Off
l
l
0.9
1.3
1.1
1.42 V
V
SHDN Pin Current (Note 13) V
SHDN
= 0V, V
IN
= 45V
V
SHDN
= 45V, V
IN
= 45V
l
l
0.5
1
3
μA
µA
Ripple Rejection V
IN
-V
OUT
= 2V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 500mA
70 85 dB
Input Reverse Leakage Current V
IN
= –45V, V
OUT
= 0
l
300 μA
Reverse Output Current (Note 14) V
OUT
= 1.2V, V
IN
= 0 0 10 μA
Internal Current Limit (Note 3) V
IN
= 2.2V, V
OUT
= 0, I
MAX
= 0
V
IN
= 2.2V, ∆V
OUT
= –5%
l
520
900 mA
mA
External Programmed Current Limit, V
OUT
= 5V
(Notes 6, 8)
5.6V < V
IN
< 10V, V
OUT
= 5V, R
IMAX
= 1.5k,
FAULT2 Pin Threshold (I
FAULT
)
l
180 200 220 mA
5.6V < V
IN
< 7V, V
OUT
= 5V, R
IMAX
= 604Ω,
FAULT2 Pin Threshold (I
FAULT
)
l
445 495 545 mA
FAULT, PWRGD Pins Logic Low Voltage Pull-Up Current = 50μA
l
0.14 0.25 V
FAULT, PWRGD Pins Leakage Current V
FAULT1
, V
FAULT2
, V
PWRGD
= 5V 0.01 1 μA
I
MIN
Threshold Accuracy (Notes 6, 9) 5.6V < V
IN
< 15V, V
OUT
= 5V, R
IMIN
= 1.2M
5.6V < V
IN
< 15V, V
OUT
= 5V, R
IMIN
= 120K
l
l
0.9
9
1
10
1.1
11
mA
mA
PWRGD Trip Point % of Nominal Output Voltage, Output Rising
l
86 90 94 %
PWRGD Trip Point Hysteresis % of Nominal Output Voltage 1 %