LT1086-05-220M中文资料
P R E L I M I A R Y
2.75
4.70BSC TO –220 Isolated Metal Package
Pin Fixed Adjustable 1GROUND ADJUST 2OUTPUT OUTPUT 3
INPUT INPUT Case is ISOLATED
LT1086–220M Positive Adjustable Regulator LT1086–05–220M Fixed +5V Regulator LT1086–12–220M
Fixed +12V Regulator
Pinouts
Ordering Information
ABSOLUTE MAXIMUM RATINGS (T case = 25°C unless otherwise stated)
LOW DROPOUT 1.5 AMP POSITIVE VOLTAGE REGULATOR
V IN Input Voltage *P D Power Dissipation
V IN
Operating Input Voltage
Adjustable 5 Volt 12 Volt
T J Operating Junction Temperature Range Control Power T STG Storage Temperature Range
T LEAD
Lead Temperature (for 10 sec.)
30V Internally limited
25V 20V 25V
–55 to 150°C –55 to 200°C –65 to 150°C
300°C
FEATURES ?Low Dropout Performance ?Fixed or Adjustable Voltages
?Fixed Output Voltages of 5V & 12V ?Output Current 1.5A
?Line Regulation 0.015% / V Typical.?Load Regulation 0.1% Typical.
?
Military Temperature Range (–55 to +150°C)
* Although the devices ’ maximum operating voltage is limited (20V for the 5V device, and 25V for the 12V and adjustable devices) the devices are guaranteed to withstand transient input voltages up to 30V. For input voltages greater than the maximum operating input voltage, some degradation of specifications will occur. For 5V and 12V devices operating at input-output voltage differentials >15V, a minimum external load of 5mA is required to maintain regulation.
BLOCK DIAGRAM
P R E L I M I N A R Y
V O
Output Voltage
V REF
Reference Voltage
REG (LINE)
Line Regulation
REG (LOAD)
Load Regulation See notes 1,2
V D
Dropout Voltage See note 3
Output
Parameter
Voltage Test Conditions
Min.
Typ.Max.
Unit
V IN = 6.5 to 20V I O = 0 to 1.5A
T J = –55 to 150°C V IN = 13.5V to 25V
I O = 0 to 1.5A
T J = –55 to 150°C V IN – V OUT = 1.5 to 15V
I O = 10mA to 1.5A T J = –55 to 150°C V IN = 6.5 to 20V I O = 0T J = –55 to 150°C V IN = 13.5 to 25V
I O = 0
T J = –55 to 150°C V IN – V OUT = 1.5 to 15V I LOAD = 10mA T J = –55 to 150°C V IN = 8V I O = 0 to 1.5A T J = –55 to 150°C V IN = 15V I O = 0 to 1.5A
T J = –55 to 150°C V IN – V OUT = 3V I O = 10mA to 1.5A T J = –55 to 150°C
D V OUT = 50mV I OUT = 1.5A T J = –55 to 150°C D V OUT = 120mV I OUT = 1.5A
T J = –55 to 150°C D V REF = 1%I OUT = 1.5A
T J = –55 to 150°C
4.90
5 5.1011.761212.241.225
1.25 1.2700.5101101252250.0150.20.0350.25201035123624720.10.30.20.41.3 1.51.3 1.51.3
1.5
5
12
ADJ.5
12
ADJ.5
12ADJ.5
12
ADJ.
ELECTRICAL CHARACTERISTICS (T J = 25°C unless otherwise stated)
V
mV
%
mV
%
V
DESCRIPTION
The LT1086 is designed to provide 1.5A with higher efficiency than currently available devices. All internal circuitry is designed to operate down to 1V input to output differential and the dropout voltage is fully specified as a function of load current. Dropout is guaranteed at a maximum of 1.5V at maximum output current, decreasing at lower load currents.On-chip trimming adjusts the reference output voltage to 1%. Current limit is also trimmed, minimising the stress on both the regulator and power source circuitry under overload conditions.
The LT1086 is pin compatible with older 3 terminal adjustable regulators. A 10m F output capacitor is required on these new devices; however, this is usually included in most regulator designs.
Unlike PNP regulators, where up to 10% of the output current is wasted as quiescent current, the LT1086 quiescent current flows into the load, increasing efficiency.
P R E
L I M I N A R Y
I CL Current Limit I Q
Quiescent Current
Minimum Load Current 4
REG (THERM)Thermal Regulation
R A
Ripple Rejection
I PIN Adjust Pin Current
D I PIN Adjust Pin Current Change T S Temperature Stability Long Term Stability V N RMS Output Noise R q JC
Thermal Resistance
Junction – Case
Output
Parameter
Voltage Test Conditions
Min.
Typ.Max.
Unit
V IN – V OUT = 5V T J = –55 to 150°C V IN – V OUT = 25V
T J = –55 to 150°C V IN ￡20V T J = –55 to 150°C V IN ￡25V T J = –55 to 150°C V IN – V OUT = 25V T J = –55 to 150°C T P = 30ms
T A = 25°C T J = –55 to 150°C
V IN = 8V C OUT = 25m F Tantalum V IN = 15V
f = 120Hz V IN – V OUT = 3V I O = 1.5A
C ADJ = 25m F
T J = –55 to 150°C V IN – V OUT = 1.5 to 15V I O = 10mA to 1.5A T J = –55 to 150°C
T J = –55 to 150°C T A = 125°C
T = 1000 Hrs f = 10Hz to 10kHz
T A = 25°C
Control Circuitry Power Transistor
1.5
1.6
2.5
0.075
0.155105105100.0080.046068546060
7555
120
0.250.50.310.003TBA TBA
512
ADJ.5
12
ADJ.
ELECTRICAL CHARACTERISTICS (T J = –55 to +150°C unless otherwise stated)
A
mA %/W
dB
m A m A %%%°C/W
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. Load regulation is measured at the output lead ?1/8” from the package.
2.Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the input - output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input - output voltage range.
3.Dropout voltage is specified over the full output current range of the device.
4.Minimum load current is defined as the minimum output current required to maintain regulation. At 25V input-output differential the device is guaranteed to regulate if the output current is greater than 10mA.