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參數(shù)資料
| 型號： | LTC3860IUH#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 1250 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封裝： | 5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32 |
| 文件頁數(shù)： | 20/36頁 |
| 文件大小： | 436K |
| 代理商： | LTC3860IUH#PBF |
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LTC3860
27
3860fc
APPLICATIONS INFORMATION
To set the output voltage equal to 1.2V:
RB = 10k
The Renesas R2J20602NP integrated-driver MOSFET is
chosen for the power stages because of its high efciency
and high level of integration.
Printed Circuit Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of
the converter.
1. The connection between the SGND pin on the LTC3860
and all of the small-signal components surrounding the
IC should be isolated from the system power ground.
Place all decoupling capacitors, such as the ones on
VCC, between ISNSP and ISNSN etc., close to the IC. In
multiphase operation SGND should be Kelvin-connected
to the main ground node near the bottom terminal of
the input capacitor. In dual-channel operation, SGND
should be Kelvin-connected to the bottom terminal of
the output capacitor for channel 2, and channel 1 should
be remotely sensed using the remote sense differential
amplier.
2. Place the small-signal components away from high
frequency switching nodes on the board. The LTC3860
contains remote sensing of output voltage and inductor
current and logic-level PWM outputs enabling the IC to
be isolated from the power stage.
3. The PCB traces for remote voltage and current sense
should avoid any high frequency switching nodes in
the circuit and should ideally be shielded by ground
planes. Each pair (VSNSP and VSNSN, ISNSP and
ISNSN) should be routed parallel to one another with
minimum spacing between them. If DCR sensing is
used, place the top resistor (Figure 6b, R1) close to
the switching node.
4. The input capacitor should be kept as close as possible
to the power MOSFETs. The loop from the input capaci-
tor’s positive terminal, through the MOSFETs and back
to the input capacitor’s negative terminal should also
be as small as possible.
5. If using discrete drivers and MOSFETs, check the
stress on the MOSFETs by independently measuring
the drain-to-source voltages directly across the device
terminals. Beware of inductive ringing that could exceed
the maximum voltage rating of the MOSFET. If this
ringing cannot be avoided and exceeds the maximum
rating of the device, choose a higher voltage rated
MOSFET.
6. When cascading multiple LTC3860 ICs, minimize
the capacitive load on the CLKOUT pin to minimize
phase error. Kelvin all the LTC3860 IC grounds to the
same point, typically SGND of the IC containing the
master.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3861EUH-1#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 DUAL 12PH 2.25MHZ 32QFN 制造商:Linear Technology 功能描述:BUCK, CNTRL, DUAL, 12PH, 2.25MHZ, 32QFN 制造商:Linear Technology 功能描述:PWM CONTROLLER, BUCK, 2.25MHZ, 24V, QFN-32, Input Voltage:24V, Output Voltage:5.5V, Output Current:60A, Supply Voltage Min:3V, Supply Voltage Max:5.5V, Digital IC Case Style:QFN, No. of Pins:32, Frequency:2.25MHz , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Dual-Phase/Dual-Channel Step-Down Voltage Mode Controller w |
| LTC3861EUH-1#TRPBF | 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN |
| LTC3861EUHE#PBF | 功能描述:IC REG CTRLR BUCK PWM VM 36-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 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 ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| LTC3861EUHE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM VM 36-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 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 ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3861IUH-1#PBF | 制造商:Linear Technology 功能描述:DC DC Cntrlr Dual-OUT Sync Step Down 3V to 24V Input 32-Pin QFN EP 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 DUAL 12PH 2.25MHZ 32QFN 制造商:Linear Technology 功能描述:BUCK, CNTRL, DUAL, 12PH, 2.25MHZ, 32QFN 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Dual-Phase/Dual-Channel Step-Down Voltage Mode Controller w 制造商:Linear Technology 功能描述:PWM CONTROLLER, BUCK, 2.25MHZ, 24V, QFN-32, Input Voltage:24V, Output Voltage:5.5V, Output Current:60A, Supply Voltage Min:3V, Supply Voltage Max:5.5V, Digital IC Case Style:QFN, No. of Pins:32, Frequency:2.25MHz , RoHS Compliant: Yes |
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