参数资料
型号: LTC3856IUH#TRPBF
厂商: Linear Technology
文件页数: 5/40页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 38-QFN
标准包装: 2,500
系列: PolyPhase®
PWM 型: 电流模式
输出数: 1
频率 - 最大: 850kHz
占空比: 94%
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: 32-WFQFN 裸露焊盘
包装: 带卷 (TR)
LTC3856
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T A = 25°C (Note 2). V IN = 15V, V RUN = 5V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Differential Amplifier
A DA
Gain
E-Grade
I-Grade
l
l
0.998
0.997
1
1
1.002
1.003
V/V
V/V
R IN
V OS
PSRR
I CL
Input Resistance
Input Offset Voltage
Power Supply Rejection Ratio
Maximum Output Current
Measured at DIFFP Input
V DIFFP = V DIFFOUT = 1.5V, I DIFFOUT = 100μA
4.5V < V IN < 38V
2
80
100
3
2
mV
dB
mA
V OUT(MAX)
Maximum Output Voltage
I DIFFOUT = 300μA
V INTVCC V INTVCC
–1.4 –1.1
V
On-Chip Drive r
TG R UP
TG R DOWN
BG R UP
BG R DOWN
GBW
SR
TG Pull-Up R DS(ON)
TG Pull-Down R DS(ON)
BG Pull-Up R DS(ON)
BG Pull-Down R DS(ON)
Gain-Bandwidth Product
Slew Rate
TG High
TG Low
BG High
BG Low
(Note 8)
(Note 8)
2.6
1.5
2.4
1.1
3
2
Ω
Ω
Ω
Ω
MHz
V/μs
Stage Shedding Mode
I ISET
Programmable Stage Shedding
Mode Current
6.5
7.5
8.5
μA
AVP (Active Voltage Positioning)
V AVP
Maximum V OUT with AVP
2.5
V
I SINK
I SOURCE
Sink Current of AVP Pin
Source Current of AVP Pin
SENSE + = 1.2V
SENSE + = 1.2V
250
2
μA
mA
V AVP -V O(MAX) Maximum Voltage Drop V AVP to V O
SENSE + = 1.2V
120
mV
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 LTC3856 is tested under pulse load conditions such that
T J ≈ T A . The LTC3856E is guaranteed to meet performance specifications
from 0°C to 85°C operating junction temperature. Specifications over
the –40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LTC3856I is guaranteed to meet performance specifications over the
full –40°C to 125°C operating junction temperature range.
Note 3: T J is calculated from the ambient temperature, T A , and power
dissipation, P D , according to the following formula:
Note 4: The LTC3856 is tested in a feedback loop that servos V ITH to a
specified voltage and measures the resultant V FB .
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See the Applications Information
section.
Note 6: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 7: The minimum on-time condition corresponds to the on inductor
peak-to-peak ripple current ≥40% of I MAX (see Minimum On-Time
Considerations in the Applications Information section).
Note 8: Guaranteed by design.
LTC3856UH: T J = T A + (P D ? 34°C/W)
LTC3856FE: T J = T A + (P D ? 25°C/W)
3856f
 
相关PDF资料
PDF描述
VI-2WD-EY-F4 CONVERTER MOD DC/DC 85V 50W
VE-B5J-EV-F1 CONVERTER MOD DC/DC 36V 150W
VE-2TP-EY-B1 CONVERTER MOD DC/DC 13.8V 50W
B41042A5477M 470UF 25V 10X20 SINGLE END
VE-2TP-EW-F4 CONVERTER MOD DC/DC 13.8V 100W
相关代理商/技术参数
参数描述
LTC3857EGN-1#PBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR
LTC3857EGN-1#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 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:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC3857EUH#PBF 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR
LTC3857EUH#PBF 制造商:Linear Technology 功能描述:IC DUAL SYNC STEP-DOWN CONTROLLER QFN-32
LTC3857EUH#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 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:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX