参数资料
型号: LTC3859EUHF#TRPBF
厂商: Linear Technology
文件页数: 12/42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
PIN FUNCTIONS
(QFN/TSSOP)
TRACK/SS1, TRACK/SS2, SS3 (Pins 34, 16, 3/Pins 38,
20, 7): External Tracking and Soft-Start Input. For the buck
channels, the LTC3859 regulates the V FB1,2 voltage to the
smaller of 0.8V, or the voltage on the TRACK/SS1,2 pin. For
the boost channel, the LTC3859 regulates the V FB3 voltage
to the smaller of 1.2V, or the voltage on the SS3 pin. An
internal 1μA pull-up current source is connected to this pin.
A capacitor to ground at this pin sets the ramp time to ?nal
regulated output voltage. Alternatively, a resistor divider on
another voltage supply connected to the TRACK/SS pins
of the buck channels allow the LTC3859 buck outputs to
track the other supply during start-up.
I TH1 , I TH2 , I TH3 (Pins 35, 15, 7/Pins 1, 19, 11): Error
Ampli?er Outputs and Switching Regulator Compensation
Points. Each associated channel’s current comparator trip
point increases.
V FB1 , V FB2 , V FB3 (Pins 36, 14, 6/Pins 2, 18, 10): Receives
the remotely sensed feedback voltage for each controller
from an external resistive divider across the output.
SENSE1 + , SENSE2 + , SENSE3 + (Pins 37, 13, 4/Pins 3, 17, 8):
The (+) Input to the Differential Current Comparators.
The I TH pin voltage and controlled offsets between the
SENSE – and SENSE + pins in conjunction with R SENSE set the
current trip threshold. For the boost channel, the SENSE3 +
pin supplies current to the current comparator.
SENSE1 – , SENSE2 – , SENSE3 – (Pins 38, 12, 5/Pins 4,
16, 9): The (–) Input to the Differential Current Compara-
tors. When SENSE1,2 – for the buck channels is greater
than INTV CC , then SENSE1,2 – pin supplies current to the
current comparator.
PGND (Exposed Pad Pin 39): Driver Power Ground. Con-
nects to the sources of bottom (synchronous) N-channel
MOSFETs and the (–) terminal(s) of C IN . The exposed
pad must be soldered to the PCB for rated electrical and
thermal performance.
3859fa
12
相关PDF资料
PDF描述
H2AXT-10112-B8-ND JUMPER-H1502TR/A3048B/X 12"
LTC1435IS#TRPBF IC REG CTRLR BUCK PWM CM 16-SOIC
LTC1142CG#TR IC REG CTRLR BUCK PWM CM 28-SSOP
H2AXT-10112-A8-ND JUMPER-H1502TR/A3048A/X 12"
9250A-823-RC CHOKE RF MOLDED 82UH FERRITE
相关代理商/技术参数
参数描述
LTC3859IFE#PBF 功能描述:IC REG CTRLR BST PWM CM 38-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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
LTC3859IFE#TRPBF 功能描述:IC REG CTRLR BST PWM CM 38-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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
LTC3859IUHF#PBF 功能描述:IC REG CTRLR BST PWM CM 38VQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP(0.173",4.40mm 宽) 包装:带卷 (TR)
LTC3859IUHF#TRPBF 功能描述:IC REG CTRLR BST PWM CM 38VQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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
LTC3860EUH#PBF 功能描述:IC REG CTRLR BUCK PWM VM 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