参数资料
型号: LTC3859EUHF#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 38-QFN
标准包装: 2,500
PWM 型: 电流模式,Burst Mode?
输出数: 3
频率 - 最大: 850kHz
占空比: 100%
电源电压: 4.5 V ~ 38 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 38-WFQFN 裸露焊盘
包装: 带卷 (TR)
LTC3859
ORDER INFORMATION
LEAD FREE FINISH
LTC3859EFE#PBF
LTC3859IFE#PBF
LTC3859EUHF#PBF
LTC3859IUHF#PBF
TAPE AND REEL
LTC3859EFE#TRPBF
LTC3859IFE#TRPBF
LTC3859EUHF#TRPBF
LTC3859IUHF#TRPBF
PART MARKING*
LTC3859FE
LTC3859FE
3859
3859
PACKAGE DESCRIPTION
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
38-Lead (5mm ¥ 7mm) Plastic QFN
38-Lead (5mm ¥ 7mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts speci?ed with wider operating temperature ranges. *The temperature grade is identi?ed by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel speci?cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating junction
temperature range, otherwise speci?cations are at T A = 25°C. V BIAS = 12V, V RUN1,2,3 = 5V, EXTV CC = 0 V unless otherwise noted. ( Note  2)
SYMBOL
V BIAS
PARAMETER
Bias Input Supply Operating Voltage
CONDITIONS
MIN
4.5
TYP
MAX
38
UNITS
V
Range
V FB1,2
Buck Regulated Feedback Voltage
(Note 4); I TH1,2 Voltage = 1.2V
–40°C to 125°C
l
0.788
0.800
0.812
V
–40°C to 85°C
0.792
0.800
0.808
V
V FB3
Boost Regulated Feedback Voltage
(Note 4); I TH3 Voltage = 1.2V
–40°C to 125°C
l
1.182
1.200
1.218
V
–40°C to 85°C
1.188
1.200
1.212
V
I FB1,2,3
V REFLNREG
Feedback Current
Reference Voltage Line Regulation
(Note 4)
(Note 4); V IN = 4V to 38V
±5
0.002
±50
0.02
nA
%/V
V LOADREG
Output Voltage Load Regulation
(Note 4)
Measured in Servo Loop;
D I TH Voltage = 1.2V to 0.7V
Measured in Servo Loop;
D I TH Voltage = 1.2V to 2V
l
l
0.01
–0.01
0.1
–0.1
%
%
g m1,2,3
Transconductance Amplifier g m
(Note 4); I TH1,2,3 = 1.2V;
2
mmho
Sink/Source 5μA
I Q
Input DC Supply Current
(Note 5)
Pulse-Skipping or
Forced Continuous Mode
(One Channel On)
RUN1 = 5V and RUN2,3 = 0V or
RUN2 = 5V and RUN1,3 = 0V or
RUN3 = 5V and RUN1,2 = 0V
2
mA
V FB1, 2 ON = 0.83V (No Load)
V FB3 = 1.25V
Pulse-Skipping or
Forced Continuous Mode
(All Channels On)
RUN1,2,3 = 5V,
V FB1,2 = 0.83V (No Load)
V FB3 = 1.25V
3
mA
Sleep Mode
RUN1 = 5V and RUN2,3 = 0V or
55
80
μA
(One Channel On, Buck)
RUN2 = 5V and RUN1,3 = 0V
V FB,ON = 0.83V (No Load)
Sleep Mode
RUN3 = 5V and RUN1,2 = 0V
55
80
μA
(One Channel On, Boost)
V FB3 = 1.25V
Sleep Mode
RUN1 = 5V and RUN2 = 0V or
65
100
μA
(Buck and Boost Channel On)
RUN2 = 5V and RUN1 = 0V
RUN3 = 5V
V FB1,2 = 0.83V (No Load)
V FB3 = 1.25V
Sleep Mode
RUN1,2,3 = 5V,
80
120
μA
(All Three Channels On)
V FB1,2 = 0.83V (No Load)
V FB3 = 1.25V
Shutdown
RUN1,2,3 = 0V
14
30
μA
3859fa
3
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