LT1117 Datasheet, PDF (3/12 Pages) Linear Technology – 800mA Low Dropout Positive Regulators Adjustable and Fixed 2.85V, 3.3V, 5V

LT1117/LT1117-2.85
LT1117-3.3/LT1117-5
ELECTRICAL CHARACTERISTICS
PARAMETER
Quiescent Current
Thermal Regulation
Ripple Rejection
LT1117-2.85
LT1117-3.3
LT1117-5
Adjust Pin Current
Adjust Pin Current Change
Temperature Stability
Long Term Stability
RMS Output Noise
Thermal Resistance
CONDITIONS
V_IN ≤ 10V
V_IN ≤ 15V
V_IN ≤ 15V
T_A = 25°C, 30ms Pulse
f_RIPPLE = 120Hz, (V_IN – V_OUT) = 3V,
V_RIPPLE = 1Vp-p
10mA ≤ I_OUT ≤ 800mA, 1.4V ≤ (V_IN – V_OUT) ≤ 10V
T_A = 125°C, 1000Hrs
(% of V_OUT), 10Hz ≤ f ≤ 10kHz
(Junction-to-Case, at Tab)
MIN TYP MAX
q
5 10
q
5 10
q
5 10
0.01 0.1
q 60
75
q
55 120
q
0.2 5
0.5
0.3
0.003
15
UNITS
mA
mA
mA
%/W
dB
µA
µA
%
%
%
°C/W
The q denotes specifications which apply over the full operating
temperature range.
Note 1: See thermal regulation specification for changes in output voltage
due to heating effects. Load regulation and line regulation are measured at
a constant junction temperature by low duty cycle pulse testing.
Note 2: Dropout voltage is specified over the full output current range of
the device. Dropout voltage is defined as the minimum input/output
differential measured at the specified output current. Test points and limits
are also shown on the Dropout Voltage curve.
Note 3: Minimum load current is defined as the minimum output current
required to maintain regulation.
TYPICAL PERFOR A CE CHARACTERISTICS
Minimum Operating Current
(Adjustable Device)
4
3
T_J = 125°C
T_J = 25°C
2
T_J = –55°C
1
Short-Circuit Current
1.25
T_J = 125°C
1.00
T_J = 25°C
0.75
0.50
0.25
0
0
5
10
15
20
INPUT/OUTPUT DIFFERENTIAL (V)
LT1117 • TPC02
0
0
5
10
15
INPUT/OUTPUT DIFFERENTIAL (V)
LT1117 • TPC03
Load Regulation
0.10
∆ I_LOAD = 800mA
0.05
0
– 0.05
– 0.10
– 0.15
– 0.20
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
LT1117 • TPC04
3