Datasheet

3
LT3028
3028f
PARAMETER CONDITIONS MIN TYP MAX UNITS
Dropout Voltage I
LOAD
= 1mA 0.10 0.15 V
(Output 2) I
LOAD
= 1mA 0.19 V
V
IN2
= V
OUT2(NOMINAL)
I
LOAD
= 10mA 0.17 0.22 V
(Notes 5, 6, 10)
I
LOAD
= 10mA 0.29 V
I
LOAD
= 50mA 0.24 0.31 V
I
LOAD
= 50mA 0.40 V
I
LOAD
= 100mA 0.30 0.35 V
I
LOAD
= 100mA 0.45 V
Dropout Voltage I
LOAD
= 10mA 0.12 0.19 V
(Output 1) I
LOAD
= 10mA 0.25 V
V
IN1
= V
OUT1(NOMINAL)
I
LOAD
= 50mA 0.17 0.22 V
(Notes 5, 6, 10)
I
LOAD
= 50mA 0.32 V
I
LOAD
= 100mA 0.21 0.28 V
I
LOAD
= 100mA 0.34 V
I
LOAD
= 500mA 0.32 0.37 V
I
LOAD
= 500mA 0.47 V
GND Pin Current I
LOAD
= 0mA 25 50 µA
(Output 2) I
LOAD
= 1mA 60 95 µA
V
IN2
= V
OUT2(NOMINAL)
I
LOAD
= 10mA 230 400 µA
(Notes 5, 7) I
LOAD
= 50mA 12 mA
I
LOAD
= 100mA 2.2 4 mA
GND Pin Current I
LOAD
= 0mA 30 75 µA
(Output 1) I
LOAD
= 1mA 65 120 µA
V
IN1
= V
OUT1(NOMINAL)
I
LOAD
= 50mA 1 1.6 mA
(Notes 5, 7) I
LOAD
= 100mA 23 mA
I
LOAD
= 250mA 58 mA
I
LOAD
= 500mA 10 16 mA
Output Voltage Noise C
OUT
= 10µF, C
BYP
= 0.01µF, I
LOAD
= Full Current, 20 µV
RMS
BW = 10Hz to 100kHz
ADJ1/ADJ2 Pin Bias Current ADJ1, ADJ2 (Notes 3, 8) 30 100 nA
Shutdown Threshold V
OUT
= Off to On 0.80 1.4 V
V
OUT
= On to Off 0.25 0.65 V
SHDN1/SHDN2 Pin Current V
SHDN1
, V
SHDN2
= 0V 0 0.5 µA
(Note 9) V
SHDN1
, V
SHDN2
= 20V 1 3.0 µA
Quiescent Current in Shutdown V
IN
= 6V, V
SHDN1
= 0V, V
SHDN2
= 0V 0.01 0.1 µA
Ripple Rejection V
IN
= 2.72V (Avg), V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz, 55 65 dB
I
LOAD
= Full Current
Current Limit Output 2, V
IN2
= 7V, V
OUT2
= 0V 500 mA
V
IN2
= 2.3V, V
OUT2
= –0.1V 110 mA
Output 1, V
IN1
= 7V, V
OUT1
= 0V 1.3 A
V
IN1
= 2.3V, V
OUT1
= –0.1V 520 mA
Input Reverse Leakage Current V
IN
= – 20V, V
OUT
= 0V 1mA
The denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C. (Note 2)
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3028 regulator is tested and specified under pulse load
conditions such that T
J
T
A
. The LT3028E is guaranteed to meet
performance specifications from 0°C to 125°C junction temperature.
Specifications over the –40°C to 125°C operating junction temperature
range are assured by design, characterization and correlation with
statistical process controls. The LT3028I is guaranteed and tested over the
full –40°C to 125°C operating junction temperature range.
Note 3: The LT3028 is tested and specified for these conditions with the
ADJ1/ADJ2 pin connected to the corresponding OUT1/OUT2 pin.