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参数资料
| 型号： | LTC3534EGN#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST SYNC 0.5A 16SSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.8 V ~ 7 V |
| 输入电压： | 2.4 V ~ 7 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-SSOP |
LTC3534
APPLICATIONS INFORMATION
f FILTER _ ZERO =
Hz
1
2 ? π ?R ESR ?C OUT
where R ESR is the equivalent series resistance of the
output capacitor.
to allow a smaller output filter capacitor. To achieve a higher
bandwidth, Type III compensation is required, providing
two zeros to compensate for the double-pole response of
the output filter. Referring to Figure 6, the location of the
poles and zeros are given by:
A troublesome feature in boost mode is the right-half plane
zero (RHP), given by:
f POLE1 ?
1
2 ? π ? 5 × 10 3 ?R1?C P1
Hz
V IN 2
2 ? π ?I OUT ?L1? V OUT
f ZERO1 =
Hz
f ZERO2 =
Hz
f POLE2 =
Hz
f RHPZ = Hz
The loop gain is typically rolled off before the RHP zero
frequency.
A simple Type I compensation network can be incorporated
to stabilize the loop, but at a cost of reduced bandwidth and
slower transient response. To ensure proper phase margin
using Type I compensation, the loop must be crossed over
a decade before the LC double pole. Referring to Figure
5, the unity-gain frequency of the error amplifier utilizing
Type I compensation is given by:
(which is extremely close to DC)
1
2 ? π ?R Z ?C P1
1
2 ? π ?R1?C Z1
1
2 ? π ?R Z ?C P2
where resistance is in Ohms and capacitance is in Farads.
f UG =
1
2 ? π ?R1?C P1
Hz
Most applications demand an improved transient response
V OUT
+
ERROR
AMP
–
1V
FB
15
V C
C P1
V OUT
11
R1
R2
+
ERROR
AMP
–
1V
FB
15
V C
14
R Z
C P2
11
C P1
C Z1
R1
R2
14
3534 F05
3534 F06
Figure 5. Error Amplifier with Type I Compensation
Figure 6. Error Amplifier with Type III Compensation
3534fb
14
For more information www.linear.com/LTC3534
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相关代理商/技术参数 |
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|---|---|
| LTC3535 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Channel 550mA 1MHz Synchronous Step-Up DC/DC Converter |
| LTC3535EDD#PBF | 功能描述:IC REG BST SYNC ADJ 0.55A 12DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC3535EDD#PBF | 制造商:Linear Technology 功能描述:DC/DC CONVERTER IC |
| LTC3535EDD#TRPBF | 功能描述:IC REG BST SYNC ADJ 0.55A 12DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC3535EDD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Channel 550mA 1MHz Synchronous Step-Up DC/DC Converter |
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