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参数资料
| 型号： | LTC3880EUJ-1#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/112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： | 500 |
| 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： | 带卷 (TR) |
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LTC3880/LTC3880-1
PIN FUNCTIONS
FREQ_CFG (Pin 17): Frequency or Phase Set/Select Pin.
Connect a ±1% resistor divider between the chip V DD25
FREQ_CFG and SGND in order to select switching frequency
or phase. If the pin is left open, the IC will use the value
programmed in the NVM. Minimize capacitance when the
pin is open to assure accurate detection of the pin state.
V OUT0_CFG /V OUT1_CFG (Pin 18/Pin 19): Output Voltage
Select Pin. Connect a ±1% resistor divider between the
chip V DD25 V OUT n _CFG and SGND in order to select output
voltage. This voltage can be adjusted with the V TRIM n _CFG
pins. If the pin is left open, the IC will use the value pro-
grammed in the NVM. Minimize capacitance when the
pin is open to assure accurate detection of the pin state.
V TRIM0_CFG /V TRIM1_CFG (Pin 20/Pin 21): Voltage Trim
Select Pin. Connect a ±1% resistor divider between the
chip V DD25 V TRIM n _CFG and SGND in order to adjust
the output voltage set point. The V TRIM n _CFG settings
in conjunction with the V OUT n _CFG setting adjusts the
voltage set point. If the pin is left open, the IC will either
not modify the V OUT n _CFG setting or use NVM. Minimize
capacitance when the pin is open to assure accurate de-
tection of the pin state.
V DD25 (Pin 22): Internally Generated 2.5V power Supply
Output Pin. Bypass this pin to SGND with a low ESR 1μF
capacitor. Do not load this pin with external current except
for the ±1% resistor dividers required for the configura-
tion pins.
WP (Pin 23): Write Protect Pin Active High. An internal
10μA current source pulls the pin to V DD33 . If WP is high,
the PMBus writes are restricted.
SHARE_CLK (Pin 24): Share Clock, Bidirectional Open-
Drain Clock Sharing Pin. Nominally 100kHz. Used to
synchronize the timing between multiple LTC3880s. Tie all
SHARE_CLK pins together. All LTC3880s will synchronize
to the fastest clock. A pull-up resistor to 3.3V is required.
V DD33 (Pin 25): Internally Generated 3.3V Power Supply
Output Pin. Bypass this pin to SGND with a low ESR 1μF
capacitor. Do not load this pin with external current except
for the pull-up resistors required for GPIO n , SCLK, SYNC
and possibly RUN n , ALERT , SDA and SCL.
V SENSE1 (Pin 27): Channel 1 Voltage Sense Input. This
input voltage is referenced to the SGND pin.
INTV CC (Pin 33) LTC3880: Internal Regulator 5V Out-
put. The control circuits are powered from this voltage.
Decouple this pin to PGND with a minimum of 4.7μF low
ESR tantalum or ceramic capacitor.
EXTV CC (Pin 33) LTC3880-1: External Regulator 5V
input. The control circuits are powered from this voltage.
Decouple this pin to PGND with a minimum of 4.7μF low
ESR tantalum or ceramic capacitor.
PGND (Pin 34): Power Ground Pin. Connect this pin closely
to the sources of the bottom N-channel MOSFETs, the (–)
terminal of C VCC and the (–) terminal of C IN .
V IN (Pin 35): Main Input Supply. Decouple this pin to
PGND with a capacitor (0.1μF to 1μF). For applications
where the main input power is 5V, tie the V IN and INTV CC
pins together.
BG0/BG1 (Pin 36/Pin 32): Bottom Gate Driver Outputs.
These pins drive the gates of the bottom N-Channel
MOSFETs between PGND and INTV CC .
BOOST0/BOOST1 (Pin 37/Pin 31): Boosted Floating Driver
Supplies. The (+) terminal of the booststrap capacitors
connect to these pins. These pins swing from a diode
voltage drop below INTV CC up to V IN + INTV CC .
TG0/TG1 (Pin 38/Pin 30): Top Gate Driver Outputs. These
are the outputs of floating drivers with a voltage swing equal
to INTV CC superimposed on the switch node voltages.
SW0/ SW1 (Pin 39/Pin 29): Switch Node Connections to
Inductors. Voltage swings at the pins are from a Schottky
diode (external) voltage drop below ground to V IN .
TSNS0/TSNS1 (Pin 40/Pin 28): Channel 0,1 External
Diode Temperature Sense. Connect to the anode of a diode
connected PNP transistor and star connect the cathode
to SGND in order to sense remote temperature. If exter-
nal temperature sense elements are not installed, short
pin to ground and set the UT_FAULT_LIMIT to –275°C,
IOUT_CAL_GAIN set to zero and the UT_FAULT_RESPONSE
to ignore.
SGND (Exposed Pad Pin 41): Signal Ground. All small-
signal and compensation components should connect to
this ground, which in turn connects to PGND at one point.
3880fb
For more information www.linear.com/LTC3880
13
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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 |
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