- 您现在的位置：买卖IC网 > PDF目录14024 > LT1303IS8#TR (Linear Technology)IC REG BOOST ADJ 0.2A 8SOIC PDF资料下载
参数资料
| 型号： | LT1303IS8#TR |
| 厂商： | Linear Technology |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.2A 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 25V |
| 输入电压： | 1.8 V ~ 6 V |
| PWM 型： | Burst Mode? |
| 电流 - 输出： | 200mA |
| 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
LT1303/LT1303-5
OPERATIO N
to about 2 μ s. Response time of C2, which determines
minimum on-time, is approximately 300ns.
Low Battery Detector
The low battery detector is enabled when SHDN is low and
disabled when SHDN is high. The comparator has no
hysteresis built in, but hysteresis can be added by
connecting a high-value resistor from LBI to LBO as
shown in Figure 5. The internal reference can be accessed
via the comparator as shown in Figure 6.
V IN
V BAT
LT1303
5V
100k
V IN
2N3906
LBO
R1
1.24V
–
+
R4
47k
V REF
OUTPUT
+
R2
2.2 μ F
R1
LBI
GND
LT1303
R2
( )
V REF = 1.24V 1 + R2
49.9k
1%
R1 = (V TRIP –1.24V) (43.5k)
HYSTERESIS ≈ 30mV
R3
2M
LT1303 F05
R1
V IN ≥ V REF + 200mV
R1 + R2 ≈ 33k
LT1303 F06
Figure 6. Accessing Internal Reference
Figure 5. R3 Adds Hysteresis to Low-Battery Detector
APPLICATIO N S I N FOR M ATIO N
Inductor Section
Inductors suitable for use with the LT1303 usually fall in
the 5 μ H to 50 μ H range. The inductor must: (1) handle
current of 1.25A without saturating, (2) have enough
inductance to provide a di/dt lower than 400mA/ μ s, and
(3) have low enough DC resistance to avoid excessive
heating or efficiency losses. Higher value inductors will
deliver more power but tend to be physically larger. Most
ferrite core drum or rod inductors such as those specified
in Table 1 are suitable for use. It is acceptable to bias open-
flux inductors (e.g. Sumida CD54) into saturation by 10 to
20% without adverse effects.
Table 1. Recommended Inductors
PHONE
Figure 7 shows inductor current of a suitable inductor,
di/dt is controlled at all times. The rapid rise in current
shown in Figure 8 results from this inductor saturating at
approximately 1A. Saturation occurs when the inductor
cannot hold any more magnetic energy in the core. Current
then increases rapidly, limited only by the resistance of the
winding. Figure 9’s inductor has high DC resistance which
results in the exponential time constant shape of the
inductor current.
I L
500mA/DIV
VENDOR
SERIES
APPROPRIATE VALUES NUMBERS
Coilcraft
D03316
D01608
10 μ H to 47 μ H (708) 639-6400
10 μ H
5 μ s/DIV
LT1303 F07
Coiltronics
OCTAPAK
CTX20-1
CTX20-2
CTX33-4
20 μ H
20 μ H
33 μ H
(407) 241-7876
Figure 7. Properly Chosen Inductor Does Not Saturate
Sumida
Gowanda
CD54
GA10
10 μ H to 33 μ H (708) 956-0666
10 μ H to 33 μ H (716) 532-2234
7
相关PDF资料 |
PDF描述 |
|---|---|
| LT1303IS8-5#TRPBF | IC REG BOOST 5V 0.2A 8SOIC |
| LT1303IS8-5#TR | IC REG BOOST 5V 0.2A 8SOIC |
| RCC20DRTI-S93 | CONN EDGECARD 40POS DIP .100 SLD |
| MAX6717AUKVDD2+T | IC SUPERVISOR MPU SOT23-5 |
| GBC35DRYN-S93 | CONN EDGECARD 70POS DIP .100 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1304 | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:MICROPOWER DC/DC CONVERTERS WITH LOW-BATTERY DETECTOR ACTIVE IN SHUTDOWN |
| LT1304-3.3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower DC/DC Converters with Low-Battery Detector Active in Shutdown |
| LT1304-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower DC/DC Converters with Low-Battery Detector Active in Shutdown |
| LT1304CS8 | 功能描述:IC REG BOOST ADJ 0.2A 8SOIC RoHS:否 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LT1304CS8#PBF | 功能描述:IC REG BOOST ADJ 0.2A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 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:8-VFDFN 裸露焊盘，8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?（2x2） 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2 |
发布紧急采购，3分钟左右您将得到回复。