- 您现在的位置：买卖IC网 > PDF目录45008 > LX1672-03CLQTR (MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP) 1 A DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PQCC38 PDF资料下载
参数资料
| 型号： | LX1672-03CLQTR |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PQCC38 |
| 封装： | PLASTIC, MLPQ-38 |
| 文件页数： | 14/20页 |
| 文件大小： | 358K |
| 代理商： | LX1672-03CLQTR |
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright
2000
Rev. 0.3m, 2005-04-12
WWW
.Microse
m
i
.CO
M
LX1672
Multiple Output LoadSHARE PWM
PRELIMINARY DATA SHEET
TM
FUNCTIONAL PIN DESCRIPTION
NAME
DESCRIPTION
FB1
Bi-Phase Operation:
Phase 1 and 2 Voltage Feedback
Single Phase Operation:
Phase 1 Voltage Feedback – connected to the output through a resistor network to
set desired output voltage of Phase 1
EOX
Error Amplifier Output – Sets external compensation for the corresponding phase denoted by “X”.
FB2
Bi-phase Operation:
Load Sharing Voltage Sense Feedback – Connect filtered phase 2 switching output (pre-
inductor) to FB2 to ensure proper current sharing between phase 1 and phase 2.
Single Phase Operation:
Phase 2 Voltage Feedback – connected to the output through a resistor network (post
inductor) to set desired output voltage of Phase 2.
RF2
Bi-Phase Operation:
Load Sharing Voltage Sense Feedback Reference – Sets reference for current sharing
control loop. Connecting filtered phase 1 switching output (pre-inductor) to REF2 forces average current in
phase 2 to be equal to phase 1.
Single Phase Operation:
Phase 2 Voltage Reference – connected to SS2 pin as reference.
VCC
IC supply voltage (nominal 5V).
VCCL
Power supply pin for all Low side drivers.
LDFB
Low Dropout Regulator Voltage Feedback – Sets output voltage of external MOSFET via resistor network.
CSX
Over-Current Limit Set – Connecting a resistor between CS pin and the source of the high-side MOSFET sets the
current-limit threshold for the corresponding phase denoted by “X”. Exceeding the current-limit threshold forces
the corresponding phase into hiccup mode protection. A minimum of 1K must be in series with this input.
SSX
Soft-start/Hiccup Capacitor Pin – During start-up, the voltage on this pin controls the output voltage of its
respective regulator. An internal 20k resistor and the external capacitor set the time constant for soft-start
function. The Soft-start function does not initialize until the supply voltage exceeds the UVLO threshold. When
an over-current condition occurs, this capacitor is used for the timing of hiccup mode protection.
AGND
Analog ground reference.
DGND
Digital ground reference.
LDGD
Low Dropout Regulator Gate Drive – Connects to gate of external N-Channel MOSFET for linear regulator
function.
PGX
Driver Power Ground. Connects to the source of the bottom N-channel MOSFETS of phase 1 where X=1, and
phase 2 where X=2 for the TSSOP. The MLPQ package has a common PG output .
HOX
High Side MOSFET Gate Driver – “X” denotes corresponding phase.
LOX
Low Side MOSFET Gate Driver – “X” denotes corresponding phase.
VCX
Phase High-Side MOSFET Gate Driver Supply – Connect to separate supply or boot strap supply to ensure
proper high-side gate driver supply voltage. “X” denotes corresponding phase. If the phase is not used connect to
VCC.
LDDIS
LDO Disable input. High disables the LDO output. This pin has a 100K nominal pulldown resistor
VSX
Voltage reference for Current sense. This is also the supply pin for the Current Sense Comparator.
“X” denotes corresponding phase. This pin cannot be left floating, if the phase is not used connect to VCC
DISX
PWM Disable Input – High disables the PWM output. This pin has a nominal 80K pulldown resistor. “X”
denotes corresponding phase.
PWGD
Open drain output , high at end of Soft Start and no Fault. Pulls low if any Fault condition occurs.
This output is present on the MLP package only.
PP
AA
CC
KK
AA
GG
EE
DD
AA
TT
AA
相关PDF资料 |
PDF描述 |
|---|---|
| LX1673-03CPWTR | 1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO20 |
| LX1673-03CLQTR | 1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PQCC20 |
| LX1673-09CPWTR | 1 A SWITCHING CONTROLLER, 1035 kHz SWITCHING FREQ-MAX, PDSO20 |
| LX1673-06CLQ | 1 A SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PQCC20 |
| LX1673-03CPW-TR | 1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LX1672-03CLQ-TR | 制造商:Microsemi Corporation 功能描述:MOSFET DRVR 0.8V 1A 3-OUT Hi/Lo Side Half Brdg Non-Inv 38-Pin MLPQ T/R |
| LX1672-03CPW | 功能描述:IC REG CTRLR BUCK PWM VM 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:LoadSHARE™ 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 |
| LX1672-03CPW-TR | 制造商:Microsemi Corporation 功能描述:MOSFET DRVR 0.8V 1A 3-OUT HI/LO SIDE HALF BRDG NON-INV 28TSS - Tape and Reel |
| LX1672-05CPW | 功能描述:IC REG CTRLR BUCK PWM VM 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:LoadSHARE™ 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 |
| LX1672-05CPW-TR | 制造商:Microsemi Corporation 功能描述:MOSFET DRVR 0.8V 1A 3-OUT HI/LO SIDE HALF BRDG NON-INV 28TSS - Tape and Reel |
发布紧急采购，3分钟左右您将得到回复。