- 您现在的位置：买卖IC网 > PDF目录4953 > LTC3880EUJ#PBF (Linear Technology)IC REG CTRLR BUCK PWM CM 40-QFN PDF资料下载
参数资料
| 型号： | LTC3880EUJ#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 22/112页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 40-QFN |
| 软件下载： | LTpowerPlay™ |
| 标准包装： | 61 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1MHz |
| 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 ~ 105°C |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 包装： | 管件 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页
LTC3880/LTC3880-1
OPERATION
VOUT_OV_FAULT_LIMIT .................................... +10%
VOUT_OV_WARN .............................................. +7.5%
VOUT_MAX....................................................... +7.5%
VOUT_MARGIN_HI ..............................................+5%
POWER_GOOD_ON ............................................. –7%
POWER_GOOD_OFF ............................................–8%
VOUT_MARGIN_LO .............................................–5%
VOUT_UV_WARN..............................................–6.5%
VOUT_UV_FAULT_LIMIT...................................... –7%
Input OV/FAULT Protection and UV Warning
Average Input OC Warn
Output OV/UV Fault and Warn Protection
Output OC Fault and Warn Protection
Internal and External Overtemperature Fault Protection
External Undertemperature Fault and Warn Protection
CML Fault (Communication, Memory or Logic)
External Fault Detection via the Bidirectional GPIO n
RCONFIG (RESISTOR CONFIGURATION) PINS
There are six input pins utilizing 1% resistor dividers be-
tween V DD25 and SGND to select key operating parameters.
The pins are ASEL, FREQ_CFG, V OUT0_CFG , V OUT1_CFG ,
V TRIM0_CFG and V TRIM1_CFG . If pins are floated, the value
stored in the corresponding NVM command is used. If
bit 6 of the MFR_CONFIG_ALL_LTC3880 configuration
command is asserted in NVM, the resistor inputs are
ignored upon power-up except for ASEL which is always
respected. The resistor configuration pins are only mea-
sured during a power-up reset or after an MFR_RESET
command is executed.
The V OUT n _CFG and V TRIM n pin settings are described in
Tables 12 and 13. These pins select the output voltages
for the LTC3880’s analog PWM controllers. If both pins
are open, the VOUT_COMMAND command is loaded from
NVM to determine the output voltage.
The following parameters are set as a percentage of the
output voltage if the RCONFIG pins are used to determined
output voltage:
n
n
n
n
n
n
n
n
n
The FREQ_CFG pin settings are described in Table 14. This
pin selects the switching frequency and phase relationships
between the two channels and SYNC pin. To synchronize to
an external clock, the part must be put into external clock
mode (FREQ_CFG pin shorted to ground). If no external
clock is supplied, the part will clock at the lowest free-
running frequency of the internal PWM oscillator. This low
clock rate will increase the ripple current of the inductor
possibly producing undesirable operation. If the external
SYNC signal is missing or misbehaving, a “PLL Lock Sta-
tus” fault will be indicated in the STATUS_MFR_SPECIFIC
command. If the user does not wish to see the PLL_FAULT
even if there is not a valid synchronization signal at power
up, bit 3 of the MFR_CONFIG_ALL_LTC3880 command
must be asserted. If the SYNC pin is connected between
multiple ICs only one of the ICs can be the oscillator, all
other ICs must be configured to external clock.
The ASEL pin settings are described in Table 15. This
pin selects the bottom 4 bits of the slave address for the
LTC3880. The 3 most significant bits are retrieved from
the NVM MFR_ADDRESS command. If the pin is floating,
the 7-bit value stored in NVM MFR_ADDRESS command
is used to determine the slave address. For more detail,
refer to Table 15a.
Note: Per the PMBus specification, pin programmed
parameters can be overridden by commands from the
digital interface with the exception of ASEL which is
always honored. Do not set any part address to 0x5A or
0x5B because these are global addresses and all parts
will respond to them.
FAULT DETECTION AND HANDLING
A variety of fault and warning reporting and handling
mechanisms are available. Fault and warning detection
capabilities include:
n
n
n
n
n
n
n
n
Pins.
In addition, the LTC3880 can map any combination of fault
indicators to their respective GPIO n pin using the propagate
GPIO n response commands, MFR_GPIO_PROPAGATE_
LTC3880. Typical usage of a GPIO pin is as a driver for an
external crowbar device, overtemperature alert, overvoltage
alert or as an interrupt to cause a microcontroller to poll
the fault commands. Alternatively, the GPIO n pins can be
3880fb
22
For more information www.linear.com/LTC3880
相关PDF资料 |
PDF描述 |
|---|---|
| UCD0J152MNL1GS | CAP ALUM 1500UF 6.3V 20% SMD |
| RMC28DRTI-S93 | CONN EDGECARD 56POS DIP .100 SLD |
| MCP1703-2502E/DB | IC REG LDO 2.5V .25A SOT-223-3 |
| RCE20DHFD | CONN EDGECARD 40POS 1MM SMD |
| RBE20DHFD | CONN EDGECARD 40POS 1MM SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3880IUJ#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 |
| LTC3880IUJ#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 |
| LTC3880IUJ-1#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 |
| LTC3880IUJ-1#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 |
| LTC3883EUH#PBF | 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN 制造商:Linear Technology 功能描述:BUCK CNTRL 24V 1MHZ 0.5/5.5V 32QFN 制造商:Linear Technology 功能描述:BUCK, CNTRL, 24V, 1MHZ, 0.5/5.5V, 32QFN 制造商:Linear Technology 功能描述:PWM CONTROLLER, BUCK, 1MHZ, 24V, QFN-32, Input Voltage:24V, Output Voltage:5.5V, Output Current:30A, Supply Voltage Min:4.5V, Supply Voltage Max:24V, Digital IC Case Style:QFN, No. of Pins:32, Frequency:1MHz, MSL:MSL 1 - Unlimited , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Digitally Programmable, Multiphase Step-Down DC/DC Controll |
发布紧急采购，3分钟左右您将得到回复。