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参数资料
| 型号： | LTC3853EUJ#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/36页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 40-QFN |
| 产品培训模块： | LTC3853 Multiphase Switching Controller |
| 标准包装： | 61 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 3 |
| 频率 - 最大： | 830kHz |
| 占空比： | 98% |
| 电源电压： | 4.5 V ~ 24 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： | 40-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1336 (CN2011-ZH PDF) |
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LTC3853
PIN FUNCTIONS
SENSE1 + , SENSE2 + , SENSE3 + (Pins 3, 5, 7): Current Sense
Comparator Inputs. The (+) inputs to the current compara-
tors are normally connected to DCR sensing networks or
current sensing resistors. SENSE3 + common modes up
to 13.5V, allowing higher V OUT voltages on channel 3.
SENSE1 – , SENSE2 – , SENSE3 – (Pins 4, 6, 8): Current
Sense Comparator Inputs. The (–) inputs to the current
comparators are connected to the outputs. SENSE3 – com-
mon modes up to 13.5V, allowing higher V OUT voltages
on channel 3.
V FB1 , V FB2 , V FB3 (Pins 9, 12, 14): Error Amplifier Feedback
Inputs. These pins receive the remotely sensed feedback
voltages for each channel from external resistive dividers
across the outputs. Connecting V FB2 to V IN through a 200k
resistor enables dual output (2 + 1) mode.
I TH1 , I TH2 , I TH3 (Pins 10, 13, 15): Current Control Thresh-
olds and Error Amplifier Compensation Points. Each as-
sociated channels’ current comparator tripping threshold
increases with its I TH control voltage. In dual output (2 +
1) mode, I TH1 and I TH2 need to be shorted externally.
SGND (Pin 11): Signal Ground. All small-signal compo-
nents and compensation components should connect
to this ground, which in turn connects to PGND at one
point.
PGOOD3 (Pin 16): Power Good Indicator Output for Phase
3. Open-drain logic out that is pulled to ground when any
channel output exceeds the ±7.5% regulation window, after
the internal 17μs power bad mask timer expires.
PGOOD12 (Pin 17): Power Good Indicator Output for
Phases 1 and 2. Open-drain logic out that is pulled to
ground when any channel output exceeds the ±7.5%
regulation window, after the internal 17μs power bad
mask timer expires.
INTV CC (Pin 22): Internal 5V Regulator Output. The
control circuits are powered from this voltage. Also
provides channel 3 driver power. Decouple this pin to
PGND with a minimum of 4.7μF low ESR tantalum or
ceramic capacitor.
EXTV CC (Pin 23): External Power Input to an Internal Switch
Connected to INTV CC . This switch closes and supplies the
IC power, bypassing the internal low dropout regulator,
whenever EXTV CC is higher than 4.7V. Do not exceed 6V
on this pin and ensure V IN > V EXTVCC at all times.
V IN (Pin 24): Main Input Supply. Decouple this pin to
PGND with a capacitor (0.1μF to 1μF).
DRV CC12 (Pin 29): Driver Voltage Input for Channels 1 and
2. Do not exceed 6V on this pin. This pin must be tied to
INTV CC externally.
BG1, BG2, BG3 (Pins 30, 28, 21): Bottom Gate Driver
Outputs. These pins drive the gates of the bottom N-channel
MOSFETs between PGND and INTV CC /DRV CC12 .
SW1, SW2, SW3 (Pins 31, 27, 20): Switch Node Con-
nections to Inductors. Voltage swing at these pins is from
a Schottky diode (external) voltage drop below ground
to V IN .
3853fa
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3853IUJ#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 40-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 |
| LTC3853IUJ#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 40-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 |
| LTC3854EDDB#PBF | 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Cut Tape Small Footprint, Low Pin Count Synchronous Step-Do |
| LTC3854EDDB#TRMPBF | 功能描述:IC REG CTRLR BUCK PWM CM 12-DFN 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:2,500 系列:- 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) |
| LTC3854EDDB#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 12-DFN 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:2,500 系列:- 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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