参数资料
| 型号： | LTC3780EG#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 25/30页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM CM 24-SSOP |
| 标准包装： | 59 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 440kHz |
| 占空比： | 99% |
| 电源电压： | 4 V ~ 36 V |
| 降压： | 是 |
| 升压： | 是 |
| 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 ~ 85°C |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 包装： | 管件 |
| 产品目录页面： | 1336 (CN2011-ZH PDF) |
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LTC3780
APPLICATIONS INFORMATION
? Use immediate vias to connect the components (includ -
ing the LTC3780’s SGND and PGND pins) to the ground
plane. Use several large vias for each power component.
? Use planes for V IN and V OUT to maintain good voltage
filtering and to keep power losses low.
? Flood all unused areas on all layers with copper. Flooding
with copper will reduce the temperature rise of power
components. Connect the copper areas to any DC net
(V IN or GND).
? Segregate the signal and power grounds. All small-
signal components should return to the SGND pin at
one point, which is then tied to the PGND pin close to
the sources of switch B and switch C.
? Place switch B and switch C as close to the controller as
possible, keeping the PGND, BG and SW traces short.
? Keep the high dV/dT SW1, SW2, BOOST1, BOOST2,
TG1 and TG2 nodes away from sensitive small-signal
nodes.
? The path formed by switch A, switch B, D1 and the C IN
capacitor should have short leads and PC trace lengths.
The path formed by switch C, switch D, D2 and the
C OUT capacitor also should have short leads and PC
trace lengths.
? The output capacitor (–) terminals should be connected
as close as possible the (–) terminals of the input
capacitor.
? Connect the top driver boost capacitor C A closely to the
BOOST1 and SW1 pins. Connect the top driver boost
capacitor C B closely to the BOOST2 and SW2 pins.
? Connect the input capacitors C IN and output capacitors
C OUT closely to the power MOSFETs. These capacitors
carry the MOSFET AC current in boost and buck mode.
? Connect V OSENSE pin resistive dividers to the (+) termi-
nals of C OUT and signal ground. A small V OSENSE bypass
capacitor may be connected closely to the LTC3780 SGND
pin. The R2 connection should not be along the high
current or noise paths, such as the input capacitors.
? Route SENSE – and SENSE + leads together with minimum
PC trace spacing. Avoid sense lines pass through noisy
area, such as switch nodes. The filter capacitor between
SENSE + and SENSE – should be as close as possible
to the IC. Ensure accurate current sensing with Kelvin
connections at the SENSE resistor. One layout example
is shown in Figure 12.
? Connect the I TH pin compensation network close to the
IC, between I TH and the signal ground pins. The capaci-
tor helps to filter the effects of PCB noise and output
voltage ripple voltage from the compensation loop.
? Connect the INTV CC bypass capacitor, C VCC , close to the
IC, between the INTV CC and the power ground pins. This
capacitor carries the MOSFET drivers’ current peaks.
An additional 1μF ceramic capacitor placed immediately
next to the INTV CC and PGND pins can help improve
noise performance substantially.
3780ff
For more information www.linear.com/LTC3780
25
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| LTC3780EUH | 制造商:Linear Technology 功能描述:DC DC Cntrlr Dual-OUT Synchronous Boost/Buck Controller 4V to 36V Input 32-Pin QFN EP |
| LTC3780EUH#PBF | 功能描述:IC REG CTRLR BST PWM CM 32-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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 |
| LTC3780EUH#PBF | 制造商:Linear Technology 功能描述:DC/DC Converter IC |
| LTC3780EUH#TR | 制造商:Linear Technology 功能描述:DC DC Cntrlr Dual-OUT Synchronous Boost/Buck Controller 4V to 36V Input 32-Pin QFN EP T/R |
| LTC3780EUH#TRPBF | 功能描述:IC REG CTRLR BST PWM CM 32-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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 |
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