LT1086_04 Datasheet, PDF (6/16 Pages) Linear Technology – 1.5A Low Dropout Positive Regulators Adjustable and Fixed 2.85V, 3.3V, 3.6V, 5V, 12V

LT1086 Series
TYPICAL PERFORMANCE CHARACTERISTICS
LT1086-5 Ripple Rejection
vs Current
100
90
80
f_R = 120Hz
V_RIPPLE ≤ 3V_P-P
70
60
f_R = 20kHz
V_RIPPLE ≤ 0.5V_P-P
50
40
30
20 V_OUT = 5V
10
C_ADJ = 25µF
C_OUT = 25µF
0
0 0.25 0.5 0.75 1.0 1.25 1.5
OUTPUT CURRENT (A)
LT1086 • TPC10
LT1086 Line Transient Response
60
40
20
C_ADJ = 1µF
0
–20
C_ADJ = 0
–40 V_OUT = 10V
–60
I_OUT = 0.2A
C_IN = 1µF TANTALUM
14 ^COUT ^{= 10µF TANTALUM}
13
12
11
0
100
200
TIME (µs)
LT1086 • TPC13
LT1086H Dropout Voltage
2
INDICATES GUARANTEED TEST POINT
– 55°C ≤ T_J ≤ 150°C
0°C ≤ T_J ≤ 125°C
1
T_J = – 55°C
T_J = 25°C
T_J = 150°C
0
0
0.1 0.2 0.3 0.4 0.5
OUTPUT CURRENT (A)
LT1086 • TPC16
LT1086-12 Ripple Rejection
80
V_RIPPLE ≤ 3V_P-P V_RIPPLE ≤ 0.5V_P-P
70
60
(V_IN – V_OUT) ≥ 3V
50
40
(V_IN – V_OUT) ≥ V_DROPOUT
30
20
10
I_OUT = 1.5A
0
10
100
1k
10k
FREQUENCY (Hz)
100k
LT1086 • TPC11
LT1086 Load Transient Response
0.3
0.2
C_ADJ = 0
0.1
0
–0.1
C_ADJ = 1µF
–0.2 _{CIN = 1µF TANTALUM}
–0.3 ^{COUT = 10µF TANTALUM}
1.5
V_OUT = 10V
V_IN = 13V
1.0
PRELOAD = 100mA
0.5
0
0
50
100
TIME (µs)
LT1086 • TPC14
LT1086H Load Regulation
0.10
∆I = 0.5A
0.05
0
–0.05
–0.10
–0.15
–0.20
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
LT1086 • TPC17
LT1086-12 Ripple Rejection
vs Current
100
90
80
f_R = 120Hz
70
V_RIPPLE ≤ 3V_P-P
60
50
f_R = 20kHz
V_RIPPLE ≤ 0.5V_P-P
40
30
20 V_OUT = 5V
10
C_ADJ = 25µF
C_OUT = 25µF
0
0 0.25 0.5 0.75 1.0 1.25 1.5
OUTPUT CURRENT (A)
LT1086 • TPC12
LT1086H Short-Circuit Current
1.2
1.0
0.8
0.6
0.4
0.2
0
0
GUARANTEED
OUTPUT CURRENT
5
10
15
20
25
INPUT/OUTPUT DIFFERENTIAL (V)
LT1086 • TPC15
LT1086H Ripple Rejection
vs Current
100
90
80
f_R = 120Hz
70
V_RIPPLE ≤ 3V_P-P
60
f_R = 20kHz
50
V_RIPPLE ≤ 0.5V_P-P
40
30
20 V_OUT = 5V
10
C_ADJ = 25µF
C_OUT = 25µF
0
0
0.1
0.2
0.3
0.4
0.5
OUTPUT CURRENT (A)
LT1086 • TPC18
6
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