参数资料
| 型号： | LT3682IDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1A 12DFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 20 V |
| 输入电压： | 3.6 V ~ 36 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 250kHz ~ 2.2MHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 12-DFN |
LT3682
ELECTRICAL CHARACTERISTICS The l denotes speci?cations which apply over the full operating temperature
range, otherwise speci?cations are at T A = 25°C, V IN = 10V, V RUN /SS = 10V, V BD = 3.3V unless otherwise noted. (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V C Source Current
V C Sink Current
V C Pin to Switch Current Gain
50
50
1.25
μA
μA
A/V
V C Switching Threshold
V C Clamp Voltage
0.5
0.6
2
0.7
V
V
Switching Frequency
R RT = 8.06kΩ
1.98
2.2
2.42
MHz
Minimum Switch Off-Time
R RT = 29.4kΩ
R RT = 158kΩ
l
0.9
225
1
250
130
1.1
275
210
MHz
kHz
ns
Switch Current Limit (Note 7)
Switch V CESAT
SYNC = 0V
SYNC = 3.3V or Clocked
I SW = 1A
1.45
1.18
1.7
1.4
460
2
1.66
A
A
mV
DA Pin Current to Stop OSC
Switch Leakage Current
Boost Schottky Diode Voltage Drop
Boost Schottky Diode Reverse Leakage
Minimum Boost Voltage (Note 5)
BOOST Pin Current
RUN/SS Pin Current
V SW = 0V, V IN = 60V
I BSD = 50mA
V SW = 10V, V BD = 0
I SW = 0.5A
V RUN/SS = 10V
l
1.25
1.6
0.01
720
0.1
1.7
10.5
12
1.95
1
850
1
2.5
17.5
20
A
μA
mV
μA
V
mA
μA
RUN/SS Input Voltage High
RUN/SS Input Voltage Low
2.5
0.2
V
V
PG Leakage Current
V PG = 5V
0.1
1
μA
PG Sink Current
V PG = 0.4V
l
100
1000
μA
PG Threshold as % of V FB
PG Threshold Hysteresis
SYNC Threshold Voltage
SYNC Input Frequency
Measured at FB pin. FB Pin Voltage Rising
Measured at FB Pin
88%
300
0.3
90%
12
550
92%
800
2.2
V
mV
mV
MHz
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 the device
reliability and lifetime.
Note 2: Absolute Maximum Voltage at V IN and RUN/SS pins is 60V for
nonrepetitive 1 second transients, and 36V for continuous operation.
Note 3: The LT3682E is guaranteed to meet performance speci?cations from
0°C to 125°C junction temperature. Speci?cations over the ? 40°C to 125°C
operating junction temperature range are assured by design, characterization
and correlation with statistical process controls. The LT3682I is guaranteed
over the full ? 40°C to 125°C operating junction temperature range.
Note 4: Bias current ?ows out of the FB pin.
Note 5: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 6: 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.
Note 7: Current limit guaranteed by design and/or correlation to static test.
Slope compensation reduces current limit at higher duty cycles.
3682f
3
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