LT1587-1.5 查看數據表（PDF） - Linear Technology
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LT1587-1.5 Datasheet PDF : 8 Pages
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LT1587-1.5
ABSOLUTE MAXIMUM RATINGS
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
FRONT VIEW
3
2
1
VIN
VOUT
GND
ORDER PART
NUMBER
LT1587CM-1.5
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.
FRONT VIEW
3
2
1
ORDER PART
VIN
NUMBER
VOUT
GND
LT1587CT-1.5
T PACKAGE
3-LEAD PLASTIC TO-220
θJA = 50°C/W
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage
Line Regulation (Notes 1, 2)
Load Regulation
(Notes 1, 2, 3)
Dropout Voltage
Current Limit (Note 3)
Quiescent Current
Ripple Rejection
Thermal Regulation
Temperature Stability
Long-Term Stability
RMS Output Noise
(% of VOUT)
Thermal Resistance
Junction to Case
CONDITIONS
VIN = 5V, TJ = 25°C, IOUT = 0mA
3V ≤ VIN ≤ 7V, 0mA ≤ IOUT ≤ 3A
3V ≤ VIN ≤ 7V, IOUT = 0mA
VIN = 5V, TJ = 25°C, 0mA ≤ IOUT ≤ IFULL LOAD
∆VOUT = 1%, IOUT = 3A
(VIN – VOUT) = 5.5V
VIN = 5V
f = 120Hz, COUT = 25µF Tant., VIN = 4.5V, IOUT = 3A
TA = 25°C, 30ms pulse
TA = 125°C, 1000 Hrs.
TA = 25°C, 10Hz ≤ f ≤ 10kHz
T Package: Control Circuitry/Power Transistor
M Package: Control Circuitry/Power Transistor
MIN
TYP
MAX
UNITS
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
%
q
1.150 1.300
V
q
3.100
3.750
A
q
7
13
mA
q
60
72
dB
0.004
0.02
%/ W
q
0.5
%
0.03
1.0
%
0.003
%
0.7/3.0
0.7/3.0
°C/ W
°C/ W
The q denotes specifications which apply over the specified operating
temperature range.
Note 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.
Note 2: Line and load regulation are guaranteed up to the maximum
power dissipation (17W for the LT1587-1.5 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.
Note 3: 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 3A. The
LT1587-1.5 has constant current limit with changes in input-to-output
voltage.
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