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LT1585A Datasheet(PDF) 2 Page - ON Semiconductor

Part No. LT1585A
Description  5A LOW DROPOUT FAST RESPONSE POSITIVE ADJUSTABLE AND FIXED VOLTAGE REGULATOR
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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LT1585A
2
MOTOROLA ANALOG IC DEVICE DATA
ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond which damage to the device may occur)
Rating
Symbol
Pin #
Value
Unit
Maximum Supply Voltage
Vin
3
12
V
Power Dissipation
Case 221A (TO–220) (TJ = +25°C)
PD
Internally Limited
W
Thermal Resistance, Junction–to–Ambient
R
θJA
65
°C/W
Thermal Resistance, Junction–to–Case
R
θJC
5.0
°C/W
Case 936 (D2PAK) (TJ = +25°C)
PD
Internally Limited
W
Thermal Resistance, Junction–to–Ambient
R
θJA
70
°C/W
Thermal Resistance, Junction–to–Case
R
θJC
5.0
°C/W
Storage Temperature Range
Tstg
–65 to 150
°C
Minimum ESD Rating (Human Body Model: C = 100pF, R = 1.5 k
W)
3.0
kV
Lead Temperature (Soldering, 10 sec.)
260
°C
Maximum Junction Temperature
TJ
150
°C
OPERATING RATINGS (Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee
specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics)
Rating
Symbol
Pin #
Value
Unit
Operating Junction Temperature Range
TJ
0 to +125
°C
Supply Voltage
3
7.0
V
ELECTRICAL CHARACTERISTICS (0 < TJ < +125°C, unless otherwise noted)
Characteristic
Symbol
Pin #
Min
Typ
Max
Unit
Reference Voltage (LT1585A)
Vref
1
V
(Vin–Vout) = 3V, Iout = 10mA, TJ = 25°C
1.238
1.250
1.262
1.5V
≤ (Vin–Vout) ≤ 5.75V, 10mA ≤ Iout ≤ 5A
1.225
1.250
1.275
Output Voltage (LT1585A–1.5)
2
V
Vin = 5V, TJ = 25°C, Iout = 0mA
1.485
1.5
1.515
3V
≤ Vin ≤ 7V, 0mA ≤ Iout ≤ 5A
1.470
1.5
1.530
Line Regulation [Notes 1, 2]
Regline
2
%
LT1585A: 2.75V
≤ Vin ≤ 7V, Iout = 10mA
0.005
0.2
LT1585A–1.5: 3V
≤ Vin ≤ 7V, Iout = 0mA
0.005
0.2
Load Regulation [Notes 1, 2]
Regload
2
%
LT1585A: (Vin–Vout) = 3V, TJ = 25°C, 10mA ≤ Iout ≤ 5A
0.05
0.3
LT1585A–1.5: Vin = 5V, TJ = 25°C, 0mA ≤ Iout ≤ 5A
0.05
0.3
LT1585A: (Vin–Vout) = 3V, 10mA ≤ Iout ≤ 5A
0.05
0.5
LT1585A–1.5: Vin = 5V, 0mA ≤ Iout ≤ 5A
0.05
0.5
Dropout Voltage
Vin–Vout
V
LT1585A:
DVREF = 1%, IOUT = 3A
1.150
1.300
LT1585A–1.5:
DVOUT = 1%, IOUT = 3A
1.150
1.300
LT1585A:
DVREF = 1%, IOUT = 5A
1.200
1.400
LT1585A–1.5:
DVOUT = 1%, IOUT = 5A
1.200
1.400
Current Limit [Note 3]
ILimit
2
A
(Vin–Vout) = 5.5V
5.0
6.0
Adjust Pin Current (LT1585A)
IAdj
1
55
120
µA
Adjust Pin Current Change (LT1585A) [Note 3]
1
µA
1.5V
≤ (Vin–Vout) ≤ 5.75V, 10mA ≤ Iout ≤ 5A
0.2
5.0
Minimum Load Current (LT1585A) 1.5V
≤ (Vin–Vout) ≤ 5.75V
ILoad min
2
2.0
10
mA
Quiescent Current (LT1585A–1.5) Vin = 5V
1
7.0
13
mA
Ripple Rejection
RR
2
dB
LT1585A: f = 120Hz, Cout = 25µF Tant., (Vin–Vout) = 3V, Iout = 5A
60
72
LT1585A–1.5: f = 120Hz, Cout = 25µF Tant., Vin = 4.5V, Iout = 5A
60
72
Thermal Regulation TJ = 25°C, 30ms Pulse
T
°Reg
0.004
%/W
Temperature Stability
T
°Stab
0.5
%
Long Term Stability TJ = 125°C, 1000 Hrs
0.03
1.0
%
RMS Output Noise (% of Vout) TJ = 25°C, 10Hz ≤ f ≤ 10kHz
0.003
%
NOTES 1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are measured at a constant
junction temperature by low duty cycle pulse testing.
2. Line and load regulations are guaranteed up to the maximum power dissipation 28.8W for the LT1585A in T–package. Power dissipation is
determined by input/output differential and the output current. Guaranteed maximum output power will not be available over the full input/output voltage range.
3. The LT1585A has constant current limit with changes in input–to–output voltage.




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