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| 型号： | LT3980IDE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 14DFN |
| 标准包装： | 91 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.79 V ~ 52.2 V |
| 输入电压： | 3.6 V ~ 58 V |
| PWM 型： | 电流模式，Burst Mode? |
| 频率 - 开关： | 225kHz ~ 2.25MHz |
| 电流 - 输出： | 2A |
| 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： | 14-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 14-DFN-EP（4x3） |
LT3980
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. V IN = 10V, V RUN/SS = 10V, V BOOST = 15V, V BD = 3.3V unless otherwise
noted. (Note 2)
PARAMETER
Quiescent Current from BD
Feedback Voltage
CONDITIONS
V RUN/SS = 0.2V
V BD = 3V, Not Switching
V BD = 0, Not Switching
●
MIN
55
782
770
TYP
0.01
82
1
790
790
MAX
0.5
115
5
798
805
UNITS
μA
μA
μA
mV
mV
FB Pin Bias Current (Note 3)
FB Voltage Line Regulation
V FB = 0.8V, V C = 1.2V
4V < V IN < 56V
●
10
0.002
40
0.01
nA
%/V
Error Amp g m
Error Amp Gain
V C Source Current
V C Sink Current
V C Pin to Switch Current Gain
V C Clamp Voltage
500
1800
60
60
3.87
2
μmho
μA
μA
A/V
V
Switching Frequency
Minimum Switch Off-Time
Switch Current Limit
Switch V CESAT
R T = 8.66k
R T = 29.4k
R T = 187k
Duty Cycle = 5%
I SW = 2A
●
1.95
0.86
195
3.3
2.25
1.07
225
140
4
540
2.55
1.27
255
230
4.9
MHz
MHz
kHz
nS
A
mV
DA Pin Current to Pause OSC
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 4)
BOOST Pin Current
RUN/SS Pin Current
RUN/SS Input Voltage High
RUN/SS Input Voltage Low
V BD = 0V
I SW = 2A
V RUN/SS = 2.5V
●
●
1.9
0.4
2.4
0.02
1.7
40
6
3
2
2.2
55
10
2.5
A
μA
V
mA
μA
V
V
PG Threshold Offset from Feedback Voltage
V FB Rising
●
50
65
80
mV
PG Hysteresis
14
mV
PG Leakage
V PG = 5V
0.1
1
μA
PG Sink Current
SYNC Threshold
SYNC Pin Bias Current
V PG = 0.4V
V SYNC = 0V
●
200
0.575
700
0.675
0.1
0.775
μA
V
μA
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: The LT3980E is guaranteed to meet performance specifications
from 0°C to 125°C. Specifications over the –40°C to 125°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LT3980I specifications are
guaranteed over the –40°C to 125°C temperature range. The LT3980H
specifications are guaranteed over the –40°C to 150°C operating
temperature range. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated at junction temperatures greater
than 125°C.
Note 3: Bias current flows out of the FB pin.
Note 4: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 5: Absolute Maximum at V IN and RUN/SS pins is 80V for non-
repetitive 1 minute transients, and 60V for continuous operation.
3980fa
For more information www.linear.com/LT3980
3
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