- 您现在的位置：买卖IC网 > PDF目录1774 > A8582KLPTR-T (Allegro Microsystems Inc)IC REG BUCK ADJ 2A 16TSSOP PDF资料下载
参数资料
| 型号： | A8582KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 16/32页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 16TSSOP |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 0.8V |
| 输入电压： | 4.7 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 250kHz ~ 2.45MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 16-TSSOP-EP |
| 其它名称： | 620-1395-6 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页当前第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
A8582
Wide Input Voltage, 2.4 MHz , 2.0 A
Asynchronous Buck Regulator
Application Information
R FSET = 26730 – 1.8
Design and Component Selection
f SW
(2)
R FB2 = 0.8 V – 1
R FB1 V OUT
V OUT
(V)
Setting the Output Voltage (VOUT, RFB1, RFB2)
The output voltage of the A8582 is determined by connecting
a resistor divider from the output node (VOUT) to the FB pin,
as shown in figure 10. There are trade-offs when choosing the
value of the feedback resisters. If the series combination (RFB1
+ RFB2) is relatively low, the light load efficiency of the regula-
tor will be reduced. So to maximize the efficiency, it is best to
choose high values for the resistors. On the other hand, if the par-
allel combination (RFB1 // RFB2) is too high, then the regulator
may be susceptible to noise coupling into the FB pin. In general,
the feedback resisters must satisfy the ratio shown in equation 1
to produce a required output voltage.
(1)
When the PWM switching frequency is chosen, the designer
should be aware of the minimum controllable PWM on-time,
t ON(MIN) of the A8582. If the system required on-time is less than
the A8582 minimum controllable on-time, then switch node jitter
will occur, and the output voltage will have increased ripple or
oscillations. The PWM switching frequency should be calculated
using equation 3, where V OUT is the output voltage, t ON(MIN) is
the minimum controllable on-time of the A8582 (worst case of
Table 2. Recommended Feedback Resistor Values
RFB1 RFB2
VOUT to FB pin FB pin to GND
(k Ω ) (k Ω )
1.2 6.04 12.1
Table 2 shows the most common output voltages and recom-
mended feedback resistor values, assuming less than 0.2% effi-
ciency loss at light load of 100 mA and a parallel combination of
4 k Ω presented to the FB pin. For optimal system accuracy, it is
recommended that the feedback resistors have ≤ 1% tolerances.
PWM Switching Frequency (RFSET)
1.5
1.8
2.5
3.3
5.0
7.0
8.0
9.6
7.50
9.09
12.4
16.5
24.9
34.8
40.2
47.5
8.45
7.15
5.76
5.23
4.75
4.53
4.42
4.32
The PWM switching frequency is set by connecting a resistor
from the FSET pin to ground. Figure 11 is a graph showing the
relationship between the typical switching frequency (y axis)
and the FSET resistor, 1/R FSET (x axis). For a given switching
frequency (f SW ), the FSET resistor can be calculated using equa-
tion 2, where f SW is in kHz and R FSET is in k Ω .
VOUT
2400
2200
2000
1800
1600
1400
1200
A8582
FB
RFB1
1000
800
600
400
RFB2
200
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.11
1/ RFSET Resistance, 1/R FSET (k Ω )
Figure 10. Connecting the feedback divider
Figure 11. PWM switching frequency versus 1/R FSET
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
16
相关PDF资料 |
PDF描述 |
|---|---|
| A8583KLPTR-T | IC REG BUCK ADJ 3.5A 16TSSOP |
| A8601KLPTR-T | IC REG MULTIPLE OUTPUT 28-TSSOP |
| A8670EESTR-T | IC REG BUCK ADJ 2A 20QFN |
| A8697ELJ-T | IC REG BUCK ADJ 4A 8SOIC |
| A8698ELJ-T | IC REG BUCK ADJ 3A 8SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A8583 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A8583 is an adjustable frequency, high output current, PWM regulator that integrates a low resistance, high-side, N-channel MOSFET. |
| A85838-000 | 制造商:TE Connectivity 功能描述:ZH4-7.0-0-SP-SM 制造商:TE Connectivity 功能描述:ZH4-7.0-0-SP-SM - Cable Rools/Shrink Tubing 制造商:TE Connectivity 功能描述:HEATSHRINK TUBING 1=350 METERS |
| A8583KLPTR-T | 功能描述:IC REG BUCK ADJ 3.5A 16TSSOP 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:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 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:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| A8584 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A8584 is an adjustable frequency, high output current, PWM regulator that integrates a low resistance, high-side, N-channel MOSFET. |
| A8584KLPTR-T | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A8584 is an adjustable frequency, high output current, PWM regulator that integrates a low resistance, high-side, N-channel MOSFET. |
发布紧急采购，3分钟左右您将得到回复。