3
LT1762 Series
1762fa
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C. (Note 2)
Dropout Voltage I
LOAD
= 1mA 0.09 0.15 V
V
IN
= V
OUT(NOMINAL)
I
LOAD
= 1mA ● 0.19 V
(Notes 5, 6) I
LOAD
= 10mA 0.15 0.21 V
I
LOAD
= 10mA ● 0.25 V
I
LOAD
= 50mA 0.21 0.27 V
I
LOAD
= 50mA ● 0.31 V
I
LOAD
= 150mA 0.27 0.33 V
I
LOAD
= 150mA ● 0.40 V
GND Pin Current I
LOAD
= 0mA ● 25 65 µA
V
IN
= V
OUT(NOMINAL)
I
LOAD
= 1mA ● 70 120 µA
(Notes 5, 7) I
LOAD
= 10mA ● 350 500 µA
I
LOAD
= 50mA ● 1.3 1.8 mA
I
LOAD
= 150mA ● 47 mA
Output Voltage Noise C
OUT
= 10µF, C
BYP
= 0.01µF, I
LOAD
= 150mA, BW = 10Hz to 100kHz 20 µV
RMS
ADJ Pin Bias Current (Notes 3, 8) 30 100 nA
Shutdown Threshold V
OUT
= Off to On ● 0.8 2 V
V
OUT
= On to Off ● 0.25 0.65 V
SHDN Pin Current V
SHDN
= 0V 0.1 µA
(Note 9) V
SHDN
= 20V 1 µA
Quiescent Current in Shutdown V
IN
= 6V, V
SHDN
= 0V 0.1 1 µA
Ripple Rejection V
IN
– V
OUT
= 1V (Avg), V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz, 50 65 dB
I
LOAD
= 150mA
Current Limit V
IN
= 7V, V
OUT
= 0V 400 mA
V
IN
= V
OUT(NOMINAL)
+ 1V, ∆V
OUT
= – 0.1V ● 160 mA
Input Reverse Leakage Current V
IN
= – 20V, V
OUT
= 0V ● 1mA
Reverse Output Current LT1762-2.5 V
OUT
= 2.5V, V
IN
< 2.5V 10 20 µA
(Note 10) LT1762-3 V
OUT
= 3V, V
IN
< 3V 10 20 µA
LT1762-3.3 V
OUT
= 3.3V, V
IN
< 3.3V 10 20 µA
LT1762-5 V
OUT
= 5V, V
IN
< 5V 10 20 µA
LT1762 (Note 3) V
OUT
= 1.22V, V
IN
< 1.22V 5 10 µA
Note 5: To satisfy requirements for minimum input voltage, the LT1762
(adjustable version) is tested and specified for these conditions with an
external resistor divider (two 250k resistors) for an output voltage of
2.44V. The external resistor divider will add a 5µA DC load on the output.
Note 6: Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a specified output current. In dropout, the
output voltage will be equal to: V
IN
– V
DROPOUT
.
Note 7: GND pin current is tested with V
IN
= V
OUT(NOMINAL)
and a current
source load. This means the device is tested while operating in its dropout
region. This is the worst-case GND pin current. The GND pin current will
decrease slightly at higher input voltages.
Note 8: ADJ pin bias current flows into the ADJ pin.
Note 9: SHDN pin current flows into the SHDN pin.
Note 10: Reverse output current is tested with the IN pin grounded and the
OUT pin forced to the rated output voltage. This current flows into the OUT
pin and out the GND pin.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT1762 regulators are tested and specified under pulse load
conditions such that T
J
≈ T
A
. The LT1762 is 100% tested at 25°C.
Performance at –40°C and 125°C is assured by design, characterization
and correlation with statistical process controls.
Note 3: The LT1762 (adjustable version) is tested and specified for these
conditions with the ADJ pin connected to the OUT pin.
Note 4: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification will not apply for
all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range must be
limited. When operating at maximum output current, the input voltage
range must be limited.
