参数资料
| 型号： | LT1613CS5#TRM |
| 厂商： | Linear Technology |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BST FLYBACK SEPIC TSOT23 |
| 标准包装： | 1 |
| 类型： | 升压（升压），回扫，Sepic |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 36 V |
| 输入电压： | 1.1 V ~ 10 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 300mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°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： | LT1613CS5 LT1613CS5#TRMCT LT1613CS5-ND |
LT1613
OPERATIO
effect on loop stability, as long as minimum capacitance
requirements are met). The transient response to a load
step of 50mA to 100mA is pictured in Figure 6. Note the
“double trace,” due to the ESR of C2. The loop is stable and
settles in less than 100 μ s. In Figure 7, C2 is replaced by a
10 μ F ceramic unit. Phase margin decreases drastically,
resulting in a severely underdamped response. By adding
R3 and C PL as detailed in Figure 8’s schematic, phase
margin is restored, and transient response to the same
load step is pictured in Figure 9. R3 isolates the device FB
pin from fast edges on the V OUT node due to parasitic PC
trace inductance.
V IN
2.5V
L1
10 μ H
D1
V OUT
5V
Figure 10’s circuit details a 5V to 12V boost converter,
delivering up to 130mA. The transient response to a load
step of 10mA to 130mA, without C PL , is pictured in
+
C1
15 μ F
V IN
LT1613
SW
R1
37.4k
+
C2
22 μ F
Figure 11. Although the ringing is less than that of the
previous example, the response is still underdamped and
can be improved. After adding R3 and C PL , the improved
SHDN
SHDN
GND
FB
R2
transient response is detailed in Figure 12.
C1: AVX TAJA156M010R
12.1k
Figure 13 shows a SEPIC design, converting a 3V to 10V
input to a 5V output. The transient response to a load step
C2: AVX TAJA226M006R
D1: MOTOROLA MBR0520
L1: MURATA LQH3C100
Figure 5. 2.5V to 5V Boost Converter with “A”
Case Size Tantalum Input and Output Capacitors
1613 F05
of 20mA to 120mA, without C PL and R3, is pictured in
Figure 14. After adding these two components, the im-
proved response is shown in Figure 15.
V IN
2.5V
L1
10 μ H
D1
V OUT
5V
V OUT
20mV/DIV
AC COUPLED
+
C1
15 μ F
SHUTDOWN
V IN
LT1613
SHDN
SW
FB
R3
10k
C PL
330pF
R1
37.4k
C2
10 μ F
GND
R2
12.1k
LOAD CURRENT
100mA
50mA
C1: AVX TAJA156M010R
200 μ s/DIV
1613 F06
C2: TAIYO YUDEN LMK325BJ106MN
D1: MBR0520
Figure 6. 2.5V to 5V Boost Converter Transient
Response with 22 μ F Tantalum Output Capacitor.
L1: MURATA LQH3C100K04
Figure 8. 2.5V to 5V Boost Converter with Ceramic
1613 F08
Apparent Double Trace on V OUT Is Due to Switching
Frequency Ripple Current Across Capacitor ESR
V OUT
20mV/DIV
AC COUPLED
Output Capacitor. C PL Added to Increase Phase Margin,
R3 Isolates FB Pin from Fast Edges
V OUT
20mV/DIV
AC COUPLED
LOAD CURRENT
100mA
50mA
LOAD CURRENT
100mA
50mA
200 μ s/DIV
1613 F07
200 μ s/DIV
1613 F09
Figure 7. 2.5V to 5V Boost Converter with
10 μ F Ceramic Output Capacitor, No C PL
Figure 9. 2.5V to 5V Boost Converter with 10 μ F Ceramic
Output Capacitor, 330pF C PL and 10k in Series with FB Pin
7
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PDF描述 |
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| LT1614CMS8 | 功能描述:IC REG INV ADJ 0.5A 8MSOP RoHS:否 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 |
| LT1614CMS8#PBF | 功能描述:IC REG INV ADJ 0.5A 8MSOP 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:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 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:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
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