参数资料
| 型号： | LT1930AES5#TRM |
| 厂商： | Linear Technology |
| 文件页数： | 5/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 1A TSOT23-5 |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.26 V ~ 34 V |
| 输入电压： | 2.45 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2.2MHz |
| 电流 - 输出： | 1A |
| 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： | 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： | LT1930AES5 LT1930AES5#TRMCT LT1930AES5-ND |
LT1930/LT1930A
APPLICATIO N S I N FOR M ATIO N
LT1930 AND LT1930A DIFFERENCES
Switching Frequency
The key difference between the LT1930 and LT1930A is
the faster switching frequency of the LT1930A. At 2.2MHz,
the LT1930A switches at nearly twice the rate of the
LT1930. Care must be taken in deciding which part to use.
The high switching frequency of the LT1930A allows
smaller cheaper inductors and capacitors to be used in a
given application, but with a slight decrease in efficiency
iron types. Choose an inductor that can handle at least 1A
without saturating, and ensure that the inductor has a low
DCR (copper-wire resistance) to minimize I 2 R power losses.
A 4.7 μ H or 10 μ H inductor will be the best choice for most
LT1930 designs. For LT1930A designs, a 2.2 μ H to 4.7 μ H
inductor will usually suffice. Note that in some applica-
tions, the current handling requirements of the inductor
can be lower, such as in the SEPIC topology where each
inductor only carries one-half of the total switch current.
Table 1. Recommended Inductors – LT1930
and maximum output current when compared to the
LT1930. Generally, if efficiency and maximum output
current are critical, the LT1930 should be used. If applica-
tion size and cost are more important, the LT1930A will be
the better choice. In many applications, tiny inexpensive
chip inductors can be used with the LT1930A, reducing
solution cost.
PART
CDRH5D18-4R1
CDRH5D18-100
CR43-4R7
CR43-100
DS1608-472
DS1608-103
L
( μ H)
4.1
10
4.7
10
4.7
10
MAX
DCR
m ?
57
124
109
182
60
75
SIZE
L × W × H
(mm)
4.5 × 4.7 × 2.0
3.2 × 2.5 × 2.0
4.5 × 6.6 × 2.9
VENDOR
Sumida
(847) 956-0666
www.sumida.com
Coilcraft
(847) 639-6400
Duty Cycle
www.coilcraft.com
The maximum duty cycle (DC) of the LT1930A is 75%
compared to 84% for the LT1930. The duty cycle for a
ELT5KT4R7M
ELT5KT6R8M
4.7
6.8
240
360
5.2 × 5.2 × 1.1
Panasonic
(408) 945-5660
www.panasonic.com
given application using the boost topology is given by:
Table 2. Recommended Inductors – LT1930A
DC =
| V OUT | – | V IN |
| V OUT |
PART
L
( μ H)
MAX
DCR
m ?
SIZE
L × W × H
(mm)
VENDOR
For a 5V to 12V application, the DC is 58.3% indicating that
the LT1930A could be used. A 5V to 24V application has
a DC of 79.2% making the LT1930 the right choice. The
LT1930A can still be used in applications where the DC, as
calculated above, is above 75%. However, the part must
be operated in the discontinuous conduction mode so that
the actual duty cycle is reduced.
LQH3C2R2M24
LQH3C4R7M24
CR43-2R2
CR43-3R3
1008PS-272
1008PS-332
2.2
4.7
2.2
3.3
2.7
3.3
126
195
71
86
100
110
3.2 × 2.5 × 2.0
4.5 × 4.0 × 3.0
3.7 × 3.7 × 2.6
Murata
(404) 573-4150
www.murata.com
Sumida
(847) 956-0666
www.sumida.com
Coilcraft
(800) 322-2645
www.coilcraft.com
INDUCTOR SELECTION
ELT5KT3R3M
3.3
204
5.2 × 5.2 × 1.1
Panasonic
(408) 945-5660
Several inductors that work well with the LT1930 are listed
in Table 1 and those for the LT1930A are listed in Table 2.
These tables are not complete, and there are many other
manufacturers and devices that can be used. Consult each
manufacturer for more detailed information and for their
entire selection of related parts, as many different sizes and
shapes are available. Ferrite core inductors should be used
to obtain the best efficiency, as core losses at 1.2MHz are
much lower for ferrite cores than for cheaper powdered-
www.panasonic.com
The inductors shown in Table 2 for use with the LT1930A
were chosen for small size. For better efficiency, use
similar valued inductors with a larger volume. For
example, the Sumida CR43 series in values ranging from
2.2 μ H to 4.7 μ H will give an LT1930A application a few
percentage points increase in efficiency, compared to the
smaller Murata LQH3C Series.
5
相关PDF资料 |
PDF描述 |
|---|---|
| LT1931AIS5#TRPBF | IC REG INV 1A TSOT23-5 |
| LT1933HS6#TRMPBF | IC REG BUCK ADJ 0.6A TSOT23-6 |
| LT1934IDCB-1#TRPBF | IC REG BUCK ADJ 60MA 6DFN |
| LT1935ES5#TRM | IC REG BST FLYBK SEPIC TSOT23-5 |
| LT1936HMS8E#TRPBF | IC REG BUCK ADJ 1.4A 8MSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1930AES5TRMPBF | 制造商:Linear Technology 功能描述:DC-DC Converter 1A 2.2MHz Step-Up TSOT23 |
| LT1930ES5 | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 2.45V to 16V 5-Pin TSOT-23 |
| LT1930ES5#PBF | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 2.45V to 16V 5-Pin TSOT-23 制造商:Linear Technology 功能描述:IC STEP-UP DC/DC CONVERTER 5-SOT-23 制造商:Linear Technology 功能描述:IC, STEP-UP DC/DC CONVERTER, 5-SOT-23 制造商:Linear Technology 功能描述:IC, STEP-UP DC/DC CONVERTER, 5-SOT-23; Primary Input Voltage:16V; No. of Outputs:1; Output Voltage:34V; Output Current:480mA; No. of Pins:5; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes |
| LT1930ES5#TR | 功能描述:IC REG BOOST ADJ 1A TSOT23-5 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 |
| LT1930ES5#TRM | 功能描述:IC REG BOOST ADJ 1A TSOT23-5 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 |
发布紧急采购，3分钟左右您将得到回复。