参数资料
| 型号： | SC196AMLTRT |
| 厂商： | Semtech |
| 文件页数： | 9/17页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1.5A 10MLP |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1V，1.05V，1.2V，1.8V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 1.5A |
| 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： | 10-VFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-MLP（3x3） |
| 其它名称： | SC196AMLDKR |
SC196A
V OUT 1
I L
POWERMANAGEMENT
Applications Information (Cont.)
Inductor Selection
The SC196A is designed for use with a 4.7 μ H inductor.
The magnitude of the inductor current ripple is dependent
on the inductor value and can be determined by the
following equation:
V OUT
V I N
L f OSC
This equation demonstrates the relationship between
input voltage, output voltage, and inductor ripple current.
The inductor should have a low DCR to minimize the
conduction losses and maximize ef ? ciency. As a minimum
requirement, the DC current rating of the inductor
should be equal to the maximum load current plus half
of the inductor current ripple, as shown by the following
equation:
PRELIMINARY
Output voltage ripple is a combination of the voltage ripple
from the charge - discharge cycle of the output capacitor
and the voltage created by the inductor ripple current
passing through the output capacitor ESR. Selecting an
output capacitor with a low ESR will reduce the output
voltage ripple component, as can be seen in the following
equation:
V OUT ( ESR ) I L ( ripple ) ESR ( COUT )
Capacitors with X7R or X5R ceramic dielectric are
strongly recommended for their low ESR and superior
temperature and voltage characteristics. Y5V capacitors
should not be used as their temperature coef ? cients
make them unsuitable for this application. Table 2 lists
the manufacturers of recommended capacitor options.
Table 1 — Recommended Inductors
I LPK I OUT ( MAX )
I L
2
Manufacturer/Part #
Value
( μ H)
DCR
( Ω )
Rated
Current
(A)
Tolerance
(%)
Dimensions
LxWxH
(mm)
Final inductor selection will depend on various design
considerations, such as ef ? ciency, EMI, size and cost.
Table 1 lists the manufacturers of practical inductor
options.
C IN Selection
The source input current to a buck converter is non-
continuous. To prevent large input voltage ripple, a low
ESR ceramic capacitor is required. A minimum value of
10 μ F should be used for suf ? cient input voltage ? ltering,
and a 22 μ F should be used for improved input voltage
BI Technologies
HM66404R1
Coilcraft
D01608C-472ML
TDK
VLCF4020T- 4R7N1R2
Taiyo Yuden
LMNP04SB4R7N
TOKO
D52LC
Sumida
CDRH3D16
Coilcraft
LPS3015
4.1
4.7
4.7
4.7
4.7
4.7
4.7
0.057
0.09
0.098
0.050
0.087
0.050
0.2
1.95
1.5
1.24
1.2
1.14
1.2
1.1
20
20
30
30
20
30
20
5.7 × 5.7 ×2.0
6.6 × 4.5 × 3.0
4.0 × 4.0 × 2.0
5.0 × 5.0 × 2.0
5.0 × 5.0 × 2.0
3.8 × 3.8 × 1.8
3.0 × 3.0 × 1.5
? ltering.
C OUT Selection
The internal compensation is designed to work with a
Note: recommended Inductors do not necessarily guarantee rated perfor-
mance of the part.
Table 2 — Recommended Capacitors
certain output ? lter corner frequency, which is de ? ned by
the equation:
Manufacturer/Part #
Value
( μ F)
Rated
Voltage
(VDC)
Temperature
Characteristic
Case Size
f C
2
1
L C OUT
Murata
GRM21BR60J226ME39L
22
6.3
X5R
0805
This single pole ? lter is designed to operate with a
minimum output capacitor value of 10 μ F. Larger output
Murata
GRM188R60J106
MKE19
10
6.3
X5R
0603
10
6.3
X5R
0603
capacitor values will improve transient performance.
If PSAVE operation is required, the minimum capacitor
value is 22 μ F.
TDK
C2012X5R0J106K
Note: Where PSAVE operation is required, 22 μ F must be used for C OUT .
? 2008 Semtech Corp.
9
www.semtech.com
相关PDF资料 |
PDF描述 |
|---|---|
| SC196ULTRT | IC REG BUCK SYNC ADJ 1.5A 10MLPD |
| SC198AMLTRT | IC REG BUCK SYNC PROG .8A 20MLPQ |
| SC198MLTRT | IC REG BUCK SYNC PROG .6A 20MLPQ |
| SC2440TETRT | IC REG BUCK 2A DL 16TSSOP |
| SC2443MLTRT | IC DUAL SYNC STP-DN CTRLR 24MLPQ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC196EVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.5A Synchronous Buck Converter with Integrated Power Devices |
| SC196UL.TRT | 制造商:SEMTECH 功能描述:I.C. |
| SC196ULTRT | 功能描述:IC REG BUCK SYNC ADJ 1.5A 10MLPD 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 |
| SC197 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:3.5MHz, 500mA Synchronous Dual Step-Down DC-DC Regulator |
| SC1972 | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:NPN EPITAXIAL PLANAR TYPE(for RF power amplifiers on VHF band Mobile radio applications) |
发布紧急采购，3分钟左右您将得到回复。