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参数资料
| 型号： | LTC3862IUH#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/42页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM CM 24-QFN |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 500kHz |
| 占空比： | 96% |
| 电源电压： | 4 V ~ 36 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 24-WQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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LTC3862
ELECTRICAL CHARACTERISTICS (Notes 2, 3) The l denotes the specifications which apply over the specified
operating junction temperature range, otherwise specifications are at T A = 25°C. V IN = 12V, RUN = 2V and SS = open, unless
otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Input an d INTV CC Linear Regulator
V IN
V IN Supply Voltage Range
4
36
V
I VIN
V IN Supply Current
Normal Mode, No Switching
Shutdown
(Note 5)
V RUN = 0V
l
l
1.8
30
3.0
80
mA
μA
INTV CC
dV INTVCC(LINE)
LDO Regulator Output Voltage
Line Regulation
6V < V IN < 36V
4.8
5.0
0.002
5.2
0.02
V
%/V
dV INTVCC(LOAD) Load Regulation
V UVLO INTV CC UV + Voltage
INTV CC UV – Voltage
3V8
LDO Regulator Output Voltage
Load = 0mA to 20mA
Rising INTV CC
Falling INTV CC
–2
3.3
2.9
3.8
%
V
V
V
Switcher Contro l Loop
V FB
dV FB /dV IN
dV FB /dV ITH
Reference Voltage
Feedback Voltage V IN Line Regulation
Feedback Voltage Load Regulation
V ITH = 0.8V (Note 6) E-Grade (Note 3)
I-Grade and H-Grade (Note 3)
V IN = 4V to 36V (Note 6)
V ITH = 0.5V to 1.2V (Note 6)
l
l
1.210
1.199
1.223
1.223
±0.002
0.01
1.235
1.248
0.01
0.1
V
V
%/V
%
g m
f 0dB
V ITH
I ITH
Transconductance Amplifier Gain
Error Amplifier Unity-Gain Crossover
Frequency
Error Amplifier Maximum Output Voltage
(Internally Clamped)
Error Amplifier Minimum Output Voltage
Error Amplifier Output Source Current
Error Amplifier Output Sink Current
V ITH = 0.8V (Note 6), ITH Pin Load = ±5μA
(Note 7)
V FB = 1V, No Load
V FB = 1.5V, No Load
660
1.8
2.7
50
–30
30
μMho
MHz
V
mV
μA
μA
I FB
V ITH(PSKIP)
I SENSE(ON)
Error Amplifier Input Bias Currents
Pulse Skip Mode Operation ITH Pin Voltage
SENSE Pin Current
(Note 6)
Rising ITH Voltage (Note 6)
Hysteresis
–50
0.275
25
0.01
–200
2
nA
V
mV
μA
V SENSE(MAX)
V SENSE(MATCH)
Maximum Current Sense Input Threshold
CH1 to CH2 Maximum Current Sense
Threshold Matching
V SLOPE = Float, Low Duty Cycle
(Note 3)
V SLOPE = Float, Low Duty Cycle (Note 3)
(V SENSE1 – V SENSE2 )
l
l
65
60
–10
75
75
85
90
10
mV
mV
mV
RUN/Soft-Start
I RUN
V RUN
V RUNHYS
I SS
R SS
RUN Source Current
High Level RUN Channel Enable Threshold
RUN Threshold Hysteresis
SS Pull-Up Current
SS Pull-Down Resistance
V RUN = 0V
V RUN = 1.5V
V SS = 0V
V RUN = 0V
–0.5
–5
1.22
80
–5
10
μA
μA
V
mV
μA
kΩ
Oscillator
f OSC
Oscillator Frequency
R FREQ = 45.6k
R FREQ = 45.6k
l
280
260
300
300
320
340
kHz
kHz
Oscillator Frequency Range
l
75
500
kHz
V FREQ
Nominal FREQ Pin Voltage
R FREQ = 45.6k
1.223
V
3862fc
For more information www.linear.com/LTC3862
3
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