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| 型号： | LT3085EDCB#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/28页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .5A 6-DFN |
| 产品培训模块： | LT3085 Adjustable Low Dropout Regulator More Information on LDOs |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 可调 |
| 输入电压： | 1.2 V ~ 36 V |
| 电压 - 压降（标准）： | 1.35V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA |
| 电流 - 限制（最小）： | 500mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN-EP（3x3） |
| 包装： | 标准包装 |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
| 其它名称： | LT3085EDCB#TRMPBFDKR |
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LT3085
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C (Note 2).
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SET Pin Current
I SET V IN = 1V, V CONTROL = 2V, I LOAD = 1mA, T J = 25°C
V IN ≥ 1V, V CONTROL ≥ 2V, 1mA ≤ I LOAD ≤ 500mA (Note 9)
l
9.9
9.8
10
10
10.1
10.2
μA
μA
Output Offset Voltage (V OUT – V SET )
Load Regulation
Line Regulation
V OS V IN = 1V, V CONTROL = 2V, I LOAD = 1mA, T J = 25°C
V IN = 1V, V CONTROL = 2V, I LOAD = 1mA
Δ I SET Δ I LOAD = 1mA to 500mA
Δ V OS Δ I LOAD = 1mA to 500mA (Note 8)
Δ I SET Δ V IN = 1V to 36V, Δ V CONTROL = 2V to 36V, I LOAD = 1mA
Δ V OS Δ V IN = 1V to 36V, Δ V CONTROL = 2V to 36V, I LOAD = 1mA
l
l
–1.5
–3
–0.1
–0.6
0.1
0.003
1.5
3
–1
0.5
mV
mV
nA
mV
nA/V
mV/V
Minimum Load Current (Notes 3, 9) V IN = V CONTROL = 10V
V IN = V CONTROL = 36V
l
l
300
500
1
μA
mA
V CONTROL Dropout Voltage (Note 4)
V IN Dropout Voltage (Note 4)
V CONTROL Pin Current (Note 5)
I LOAD = 100mA
I LOAD = 500mA
I LOAD = 100mA
I LOAD = 500mA
I LOAD = 100mA
I LOAD = 500mA
l
l
l
l
l
1.2
1.35
85
275
3
8
1.6
150
450
6
15
V
V
mV
mV
mA
mA
Current Limit (Note 9)
Error Ampli?er RMS Output Noise (Note 6)
V IN = 5V, V CONTROL = 5V, V SET = 0V, V OUT = –0.1V
I LOAD = 500mA, 10Hz ≤ f ≤ 100kHz, C OUT = 10μF, C SET = 0.1μF
l
500
650
33
mA
μV RMS
Reference Current RMS Output Noise (Note 6) 10Hz ≤ f≤ 100kHz
0.7
nA RMS
Ripple Rejection
Thermal Regulation, I SET
f = 120Hz, V RIPPLE = 0.5V P-P , I LOAD = 0.1A, C SET = 0.1μF, C OUT = 2.2μF
f=10kHz
f=1MHz
10ms Pulse
90
75
20
0.003
dB
dB
dB
%/W
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2. Unless otherwise speci?ed, all voltages are with respect to V OUT .
The LT3085 is tested and speci?ed under pulse load conditions such that
T J ? T A . The LT3085E is 100% tested at T A = 25°C. Performance of the
LT3085E over the full –40°C to 125°C operating junction temperature
range is assured by design, characterization, and correlation with
statistical process controls. The LT3085I regulators are guaranteed
over the full –40°C to 125°C operating junction temperature range. The
LT3085 (MP grade) is 100% tested and guaranteed over the –55°C to
125°C operating junction temperature range.
Note 3. Minimum load current is equivalent to the quiescent current of
the part. Since all quiescent and drive current is delivered to the output
of the part, the minimum load current is the minimum current required to
maintain regulation.
Note 4. For the LT3085, dropout is caused by either minimum control
voltage (V CONTROL ) or minimum input voltage (V IN ). Both parameters are
speci?ed with respect to the output voltage. The speci?cations represent
the minimum input-to-output differential voltage required to maintain
Note 5. The V CONTROL pin current is the drive current required for the
output transistor. This current will track output current with roughly a 1:60
ratio. The minimum value is equal to the quiescent current of the device.
Note 6. Output noise is lowered by adding a small capacitor across the
voltage setting resistor. Adding this capacitor bypasses the voltage setting
resistor shot noise and reference current noise; output noise is then equal
to error ampli?er noise (see Applications Information section).
Note 7. The SET pin is clamped to the output with diodes through 1k
resistors. These resistors and diodes will only carry current under
transient overloads.
Note 8. Load regulation is Kelvin sensed at the package.
Note 9. Current limit includes foldback protection circuitry. Current limit
decreases at higher input-to-output differential voltages. See the Typical
Performance Characteristics graphs for more information.
Note 10. This IC includes over-temperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when over-temperature protection is active. Continuous operation above
the speci?ed maximum operating junction temperature may impair device
reliability.
regulation.
3085fb
3
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