Datasheet

3
LT1129/LT1129-3.3/LT1129-5
112935fd
PARAMETER CONDITIONS MIN TYP MAX UNITS
Regulated Output Voltage LT1129-3.3 V
IN
= 3.8V, I
OUT
= 1mA, T
J
= 25°C 3.250 3.300 3.350 V
(Notes 4, 12) 4.3V < V
IN
< 20V, 1mA < I
OUT
< 700mA ● 3.200 3.300 3.400 V
LT1129-5 V
IN
= 5.5V, I
OUT
= 1mA, T
J
= 25°C 4.925 5.000 5.075 V
6V < V
IN
< 20V, 1mA < I
OUT
< 700mA ● 4.850 5.000 5.150 V
LT1129 (Note 5) V
IN
= 4.3V, I
OUT
= 1mA, T
J
= 25°C 3.695 3.750 3.805 V
4.8V < V
IN
< 20V, 1mA < I
OUT
< 700mA ● 3.640 3.750 3.860 V
Line Regulation (Note 12) LT1129-3.3 ΔV
IN
= 4.8V to 20V, I
OUT
= 1mA ● 1.5 10 mV
LT1129-5 ΔV
IN
= 5.5V to 20V, I
OUT
= 1mA ● 1.5 10 mV
LT1129 (Note 5) ΔV
IN
= 4.3V to 20V, I
OUT
= 1mA ● 1.5 10 mV
Load Regulation (Note 12) LT1129-3.3 ΔI
LOAD
= 1mA to 700mA, T
J
= 25°C620mV
ΔI
LOAD
= 1mA to 700mA ● 15 30 mV
LT1129-5 ΔI
LOAD
= 1mA to 700mA, T
J
= 25°C620mV
ΔI
LOAD
= 1mA to 700mA ● 20 30 mV
LT1129 (Note 5) ΔI
LOAD
= 1mA to 700mA, T
J
= 25°C620mV
ΔI
LOAD
= 1mA to 700mA ● 15 30 mV
Dropout Voltage I
LOAD
= 10mA, T
J
= 25°C 0.13 0.20 V
(Note 6) I
LOAD
= 10mA ● 0.25 V
I
LOAD
= 100mA, T
J
= 25°C 0.25 0.35 V
I
LOAD
= 100mA ● 0.45 V
I
LOAD
= 500mA, T
J
= 25°C 0.37 0.45 V
I
LOAD
= 500mA ● 0.60 V
I
LOAD
= 700mA, T
J
= 25°C 0.45 0.55 V
I
LOAD
= 700mA ● 0.70 V
Ground Pin Current I
LOAD
= 0mA ● 50 70 μA
(Note 7) I
LOAD
= 10mA ● 310 450 μA
I
LOAD
= 100mA ● 2.0 3.5 mA
I
LOAD
= 300mA ● 10 20 mA
I
LOAD
= 500mA ● 25 45 mA
I
LOAD
= 700mA ● 50 90 mA
Adjust Pin Bias Current (Notes 5, 8) T
J
= 25°C 150 300 nA
Shutdown Threshold V
OUT
= Off to On ● 1.2 2.8 V
V
OUT
= On to Off ● 0.25 0.75 V
Shutdown Pin Current (Note 9) V
SHDN
= 0V ● 610 μA
Quiescent Current in Shutdown V
IN
= 6V, V
SHDN
= 0V ● 15 25 μA
(Note 10)
Ripple Rejection V
IN
– V
OUT
= 1V (Avg), V
RIPPLE
= 0.5V
P-P
,5264dB
f
RIPPLE
= 120Hz, I
LOAD
= 0.7A, T
J
= 25°C
Current Limit V
IN
– V
OUT
= 7V, T
J
= 25°C 1.2 1.6 A
Input Reverse Leakage Current V
IN
= –20V, V
OUT
= 0V ● 1.0 mA
Reverse Output Current (Note 11) LT1129-3.3 V
OUT
= 3.3V, V
IN
= 0V 16 25 μA
LT1129-5 V
OUT
= 5V, V
IN
= 0V 16 25 μA
LT1129 (Note 5) V
OUT
= 3.8V, V
IN
= 0V 16 25 μA
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.