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參數(shù)資料
| 型號： | LX1672-03CPW |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Multiple Output LoadSHARE PWM |
| 中文描述： | 1 A DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | ROHS COMPLIANT, PLASTIC, TSSOP-28 |
| 文件頁數(shù)： | 3/20頁 |
| 文件大小： | 358K |
| 代理商： | LX1672-03CPW |
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
W
M
.
C
LX1672
Multiple Output LoadSHARE PWM
P
RELIMINARY
D
ATA
S
HEET
TM
F U N C T I O N A L P I N D E S C R I P T I O N
N
AME
D
ES CRIPT ION
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
Error Amplifier Output – Sets external compensation for the corresponding phase denoted by “X”.
EOX
FB2
Bi-phase Operation:
Load Sharing Voltage Sense Feedback – Connect filtered phase 2 switching output (pre-
inductor) to FB
2
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.
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 REF
2
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.
IC supply voltage (nominal 5V).
RF2
VCC
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.
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.
Analog ground reference.
SSX
AGND
DGND
Digital ground reference.
LDGD
Low Dropout Regulator Gate Drive – Connects to gate of external N-Channel MOSFET for linear regulator
function.
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 .
High Side MOSFET Gate Driver – “X” denotes corresponding phase.
PGX
HOX
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.
LDO Disable input. High disables the LDO output. This pin has a 100K
nominal pulldown resistor
LDDIS
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
PWM Disable Input – High disables the PWM output. This pin has a nominal 80K
pulldown resistor. “X”
denotes corresponding phase.
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.
DISX
PWGD
P
A
C
K
A
G
E
D
A
T
A
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:LoadSHARE™ 特色產品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱: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 |
| LX1672-06CLQ | 功能描述:IC REG CTRLR BUCK PWM VM 38MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:LoadSHARE™ 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| LX1672-06CLQ-TR | 制造商:Microsemi Corporation 功能描述:MOSFET DRVR 0.8V 1A 3-OUT HI/LO SIDE HALF BRDG NON-INV 38MLP - Tape and Reel |
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