LT1585-1.5 Ver la hoja de datos (PDF) - Linear Technology
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LT1585-1.5 Datasheet PDF : 8 Pages
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LT1585-1.5/LT1585A-1.5
ABSOLUTE MAXIMUM RATINGS (Note 1)
VIN ............................................................................ 7V
Operating Junction Temperature Range
Control Section .................................. 0°C to 125°C
Power Transistor ................................ 0°C to 150°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PRECONDITIONI G
100% Thermal Limit Functional Test
PACKAGE/ORDER INFORMATION
TAB
IS
OUTPUT
FRONT VIEW
3
2
1
VIN
VOUT
GND
M PACKAGE
3-LEAD PLASTIC DD
θJA = 30°C/W*
*WITH PACKAGE
SOLDERED TO 0.5
SQUARE INCH COPPER
AREA OVER BACKSIDE
GROUND PLANE OR
INTERNAL POWER PLANE.
θJA CAN VARY FROM
20°C/W TO > 40°C/W
WITH OTHER MOUNTING
TECHNIQUES
ORDER PART
NUMBER
LT1585CM-1.5
LT1585ACM-1.5
Consult factory for Industrial and Military grade parts.
TAB IS
OUTPUT
FRONT VIEW
3
2
1
T PACKAGE
3-LEAD PLASTIC TO-220
θJA = 50°C/W
ORDER PART
NUMBER
VIN
VOUT LT1585CT-1.5
GND LT1585ACT-1.5
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the specified operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage (Note 4)
Line Regulation (Notes 2, 3)
Load Regulation
(Notes 2, 3, 4)
VIN = 5V, TJ = 25°C, IOUT = 0mA
3V ≤ VIN ≤ 7V, 0mA ≤ IOUT ≤ IFULL LOAD
3V ≤ VIN ≤ 7V, IOUT = 0mA
VIN = 5V, TJ = 25°C, 0mA ≤ IOUT ≤ IFULL LOAD
1.485 (– 1%) 1.5 1.515 (+ 1%)
V
q 1.470 (– 2%) 1.5 1.530 (+ 2%)
V
0.005
0.2
%
0.05
0.3
%
q
0.05
0.5
%
Dropout Voltage (Note 4)
Current Limit
Quiescent Current
Ripple Rejection (Note 4)
Thermal Regulation
Temperature Stability
∆VOUT = 1%, IOUT = IFULL LOAD
q
1.200 1.400
V
LT1585-1.5, (VIN – VOUT) = 5.5V
LT1585A-1.5, (VIN – VOUT) = 5.5V
q
4.60
5.25
A
q
5.00
6.00
A
VIN = 5V
q
7
13
mA
f = 120Hz, COUT = 25µF Tant., VIN = 4.5V, IOUT = IFULL LOAD q
60
72
dB
TA = 25°C, 30ms Pulse
0.004
0.02
%/ W
q
0.5
%
Long-Term Stability
RMS Output Noise
(% of VOUT)
Thermal Resistance
Junction to Case
TA = 125°C, 1000 Hrs.
TA = 25°C, 10Hz ≤ f ≤ 10kHz
T Package: Control Circuitry/Power Transistor
M Package: Control Circuitry/Power Transistor
0.03
0.003
1.0
0.7/3.0
0.7/3.0
%
%
°C/ W
°C/ W
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: 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.
Note 3: Line and load regulation are guaranteed up to the maximum
power dissipation (25W for the LT1585-1.5 in T package and 27.5W for
the LT1585A-1.5). 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.
Note 4: IFULL LOAD is defined as the maximum value of output load current
as a function of input-to-output voltage. IFULL LOAD is equal to 4.6A for the
LT1585-1.5 and 5A for the LT1585A-1.5. The LT1585-1.5/LT1585A-1.5
have constant current limit with changes in input-to-output voltage.
2
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