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参数资料
| 型号： | LTC3736-2EUF#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO24 |
| 封装： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-24 |
| 文件页数： | 5/28页 |
| 文件大小： | 344K |
| 代理商： | LTC3736-2EUF#PBF |
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LTC3736-2
13
37362fb
OPERATION
Figure 2 shows example waveforms for a single-phase
dual controller versus a 2-phase LTC3736-2 system. In this
case, 2.5V and 1.8V outputs, each drawing a load current
of 2A, are derived from a 7V (e.g., a 2-cell Li-Ion battery)
input supply. In this example, 2-phase operation would
reduce the RMS input capacitor current from 1.79ARMS
to 0.91ARMS. While this is an impressive reduction by
itself, remember that power losses are proportional to
IRMS2, meaning that actual power wasted is reduced by
a factor of 3.86.
The reduced input ripple current also means that less
power is lost in the input power path, which could include
batteries, switches, trace/connector resistances, and
protection circuitry. Improvements in both conducted
and radiated EMI also directly accrue as a result of the
reduced RMS input current and voltage. Signicant cost
and board footprint savings are also realized by being able
to use smaller, less expensive, lower RMS current-rated
input capacitors.
Of course, the improvement afforded by 2-phase operation
is a function of the relative duty cycles of the two control-
lers, which in turn are dependent upon the input supply
voltage. Figure 3 depicts how the RMS input current varies
for single-phase and 2-phase dual controllers with 2.5V
and 1.8V outputs over a wide input voltage range.
It can be readily seen that the advantages of 2-phase op-
eration are not limited to a narrow operating range, but in
fact extend over a wide region. A good rule of thumb for
most applications is that 2-phase operation will reduce the
input capacitor requirement to that for just one channel
operating at maximum current and 50% duty cycle.
Figure 2. Example Waveforms for a Single-Phase
Dual Controller vs the 2-Phase LTC3736-2
Figure 3. RMS Input Current Comparison
Single-Phase
Dual Controller
2-Phase
Dual Controller
SW1 (V)
SW2 (V)
IL1
IL2
IIN
37362 F02
INPUT VOLTAGE (V)
2
0
INPUT
CAPACITOR
RMS
CURRENT
0.2
0.6
0.8
1.0
2.0
1.4
4
6
7
37362 F03
0.4
1.6
1.8
1.2
35
8
9
10
SINGLE-PHASE
DUAL CONTROLER
2-PHASE
DUAL CONTROLER
VOUT1 = 2.5V/2A
VOUT2 = 1.8V/2A
(Refer to Functional Diagram)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3736EGN | 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:否 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:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 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 ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3736EGN#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
| LTC3736EGN#TR | 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:否 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:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 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 ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3736EGN#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP 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:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 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 ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3736EGN-1 | 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:否 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 |
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