- 您现在的位置：买卖IC网 > PDF目录15310 > LTC3832-1ES8#TRPBF (Linear Technology)IC REG CTRLR BUCK PWM VM 8-SOIC PDF资料下载
参数资料
| 型号： | LTC3832-1ES8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 17/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 8-SOIC |
| 标准包装： | 2,500 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 360kHz |
| 占空比： | 95% |
| 电源电压： | 3 V ~ 8 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 ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
LTC3832/LTC3832-1
APPLICATIO S I FOR ATIO
between the top of the resistor divider network and the V FB
pin to create a pole-zero pair in the loop compensation.
The zero location is prior to the pole location and thus,
phase lead can be added to boost the phase margin at the
loop crossover frequency. The pole and zero locations are
Table 3 shows the suggested compensation component
values for 3.3V to 2.5V applications based on 470 μ F Sanyo
POSCAP 4TPB470M output capacitors.
Table 3. Recommended Compensation Network for 3.3V to 2.5V
Applications Using Multiple Paralleled 470 μ F Sanyo POSCAP
located at:
f ZC2 = 1/[2 π (R2)(C2)] and
4TPB470M Output Capacitors
L1 ( μ H) C OUT ( μ F)
1.2 1410
R C (k ? )
13
C C ( μ F)
0.0047
C1 (pF)
100
f PC2 = 1/[2 π (R1||R2)(C2)]
where R1||R2 is the parallel combination resistance of R1
and R2. For low R2/R1 ratios there is not much separa-
tion between f CZ2 and f PC2 . In this case, use multiple
capacitors with a high ESR ? capacitance product to bring
f ESR close to f CO . Choose C2 so that the zero is located at
a lower frequency compared to f CO and the pole location
1.2
1.2
2.4
2.4
2.4
4.7
4.7
4.7
2820
4700
1410
2820
4700
1410
2820
4700
27
51
33
62
82
62
150
220
0.0018
0.0015
0.0033
0.0022
0.001
0.0022
0.0015
0.0015
56
47
56
15
39
15
10
2
is high enough that the closed loop has enough phase
margin for stability. Figure 10c shows the Bode plot using
phase lead compensation around the LTC3832 resistor
divider network.
Although a mathematical approach to frequency compen-
sation can be used, the added complication of input and/or
output filters, unknown capacitor ESR, and gross operat-
ing point changes with input voltage, load current varia-
tions, all suggest a more practical empirical method. This
can be done by injecting a transient current at the load and
Table 4 shows the suggested compensation component
values for 3.3V to 2.5V applications based on 1500 μ F
Sanyo MV-WX output capacitors.
Table 4. Recommended Compensation Network for 3.3V to 2.5V
Applications Using Multiple Paralleled 1500 μ F Sanyo MV-WX
Output Capacitors
L1 ( μ H) C OUT ( μ F) R C (k ? ) C C ( μ F) C1 (pF)
1.2 4500 39 0.0042 180
1.2 6000 56 0.0033 120
1.2 9000 82 0.0033 100
using an RC network box to iterate toward the final values,
or by obtaining the optimum loop response using a
network analyzer to find the actual loop poles and zeros.
Table 2 shows the suggested compensation component
value for 3.3V to 2.5V applications based on Sanyo OS-CON
4SP820M low ESR output capacitors.
2.4
2.4
2.4
4.7
4.7
4.7
4500
6000
9000
4500
6000
9000
82
100
150
120
220
220
0.0033
0.0022
0.0022
0.0022
0.0022
0.0015
82
56
68
39
27
33
Table 2. Recommended Compensation Network for 3.3V to 2.5V
Applications Using Multiple Paralleled 820 μ F Sanyo OS-CON
4SP820M Output Capacitors
LAYOUT CONSIDERATIONS
L1 ( μ H)
1.2
1.2
1.2
2.4
2.4
2.4
4.7
4.7
4.7
C OUT ( μ F)
1640
2460
4100
1640
2460
4100
1640
2460
4100
R C (k ? )
9.1
15
24
22
33
43
33
56
91
C C (nF)
4.7
4.7
3.3
4.7
3.3
2.2
3.3
2.2
2.2
C1 (pF)
560
330
270
330
220
180
120
100
100
C2 (pF)
1500
1500
1500
1500
1500
1500
1500
1500
1500
When laying out the printed circuit board, use the follow-
ing checklist to ensure proper operation of the LTC3832.
These items are also illustrated graphically in the layout
diagram of Figure 11. The thicker lines show the high
current paths. Note that at 10A current levels or above,
current density in the PC board itself is a serious concern.
Traces carrying high current should be as wide as pos-
sible. For example, a PCB fabricated with 2oz copper
requires a minimum trace width of 0.15" to carry 10A.
sn3832 3832fs
17
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3832-1ES8#TR | IC REG CTRLR BUCK PWM VM 8-SOIC |
| VE-B2Z-EW-F1 | CONVERTER MOD DC/DC 2V 40W |
| LT1950EGN#TRPBF | IC REG CTRLR PWM CM 16-SSOP |
| LT1950EGN#TR | IC REG CTRLR PWM CM 16-SSOP |
| ASC05DRYI-S93 | CONN EDGECARD 10POS DIP .100 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3832EGN | 功能描述:IC REG CTRLR BUCK PWM VM 16-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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) |
| LTC3832EGN#PBF | 功能描述:IC REG CTRLR BUCK PWM VM 16-SSOP 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: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) |
| LTC3832EGN#TR | 功能描述:IC REG CTRLR BUCK PWM VM 16-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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) |
| LTC3832EGN#TRPBF | 功能描述:IC REG CTRLR BUCK PWM VM 16-SSOP 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: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) |
| LTC3832EG-T | 制造商:LINEAR TECHNOLOGY CORPORA 功能描述: 制造商:LINTEC 功能描述: |
发布紧急采购，3分钟左右您将得到回复。