- 您现在的位置：买卖IC网 > PDF目录1852 > MCP16323T-500E/NG (Microchip Technology)IC REG BUCK SYNC 5V 3A 16-VQFN PDF资料下载
参数资料
| 型号： | MCP16323T-500E/NG |
| 厂商： | Microchip Technology |
| 文件页数： | 20/32页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 5V 3A 16-VQFN |
| 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： | 5V |
| 输入电压： | 6 V ~ 18 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 3A |
| 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： | 16-VFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 16-QFN（3x3） |
| 其它名称： | MCP16323T-500E/NGDKR |
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页第16页第17页第18页第19页当前第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
MCP16323
TABLE 5-1:
CAPACITOR VALUE RANGE
5.0.7
BOOST CAPACITOR
Parameter
C OUT
Min
33 μF
Max
None
The boost capacitor is used to supply current for the
internal high-side drive circuitry that is above the input
voltage. The boost capacitor must store enough energy
5.0.6 INDUCTOR SELECTION
The MCP16323 is designed to be used with small
surface mount inductors. Several specifications should
be considered prior to selecting an inductor. To
optimize system performance, low ESR inductors
to completely drive the high-side switch on and off. A
22 nF X5R or X7R capacitor is recommended for all
applications. The boost capacitor maximum voltage is
5.5V, so a 6.3V or 10V rated capacitor is
recommended.
should be used.
5.0.8
THERMAL CALCULATIONS
Δ I L = ----- L - × t ON
EQUATION 5-3: INDUCTOR CURRENT
RIPPLE
V
L
The MCP16323 is available in a 3x3 QFN-16 package.
By calculating the power dissipation and applying the
package thermal resistance ( θ JA ), the junction
temperature is estimated. The maximum continuous
junction temperature rating for the MCP16323 is
+125°C.
To quickly estimate the internal power dissipation for
EXAMPLE 5-3:
MCP16323 PEAK
INDUCTOR CURRENT – 3A
the switching step-down regulator, an empirical
calculation using measured efficiency can be used.
Given the measured efficiency, the internal power
P DIS = ------------------------------- – ( V OUT × I OUT )
V IN = 12V
V OUT = 3.3V
I OUT = 3A
L = 4.7 μH
Δ IL
2
I LPK = --------- + IOUT
Inductor ripple current = 509 mA
Inductor peak current = 3.255A
An inductor saturation rating minimum of 3.255A is
recommended. A trade-off between size, cost and
efficiency is made to achieve the desired results.
dissipation is estimated in Equation 5-4 . This power
dissipation includes all internal and external
component losses. For a quick internal estimate,
subtract the estimated inductor ESR loss from the P DIS
EQUATION 5-4: TOTAL POWER
DISSIPATION ESTIMATE
V OUT × I OUT
Efficency
The difference between the first term, input power, and
the second term, power delivered, is the total system
power dissipation. The inductor losses are estimated
by P L = I OUT2 x L ESR .
TABLE 5-2:
MCP16323 RECOMMENDED
INDUCTORS
EXAMPLE 5-4:
POWER DISSIPATION
Part Number
Coilcraft ?
Value
(μH)
DCR
( Ω )
I SAT
(A)
Size
WxLxH
(mm)
V IN =
V OUT =
I OUT =
Efficiency =
12V
5.0V
3A
88%
MSS6132-472
4.7
0.056
2.84
6.1x6.1x3.2
Total System Dissipation
=
2.05 W
LPS6225-472
MSS7341-502
DO1813H-472
4.7
4.7
4.7
0.065
0.024
0.054
3.2
3.16
2.6
6.2x6.2x2.5
7.3x7.3x4.1
8.89x6.1x5.0
L ESR = 0.02 Ω
P L = 180 mW
MCP16323 internal power dissipation estimate:
Wurth Elektronik ?
7447785004 4.7
7447786004 4.7
0.06
0.057
2.5
2.8
5.9x6.2x3.3
5.9x6.2x5.1
P DIS – P L =
θ JA =
Estimated Junction =
1.87 W
38.5°C/W
+71.995°C
EPCOS
7447789004
?
B82464G2
B82464A2
4.7
4.7
4.7
0.033
0.033
0.03
3.9
3.1
4.5
7.3x3.2x1.5
10.4x10.4x3.0
10.4x10.4x3.0
Note
1:
2:
θ JA = 38.5°C/W for a 4-layer FR4 Printed Circuit
Board with a 13.5 in 2 , 1 oz internal copper ground
plane.
A smaller ground plane will result in a larger θ JA
temperature rise.
DS22284A-page 20
? 2011 Microchip Technology Inc.
相关PDF资料 |
PDF描述 |
|---|---|
| MCP1640C-I/MC | IC REG BOOST SYNC ADJ 0.1A 8DFN |
| MCP1653ST-E/UN | IC REG CTRLR BST FLYBK CM 10MSOP |
| MCP1700-3002E/TO | IC REG LDO 3V .25A TO-92-3 |
| MCP1701AT-4602I/MB | IC REG LDO 4.6V SOT89-3 |
| MCP1702T-1502E/MB | IC REG LDO 1.5V 50MA SOT89-3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP16323T-ADJE/NG | 功能描述:开关变换器、稳压器与控制器 3A Synchrouns Buck Switcher 18Vin RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MCP1632-BAE/MC | 制造商:Microchip Technology Inc 功能描述:STANDALONE LOW-SIDE PWM CONTROLLER WITH INTEGRATED MOSFET DR - Rail/Tube |
| MCP1632-BAE/MS | 制造商:Microchip Technology Inc 功能描述:STANDALONE LOW-SIDE PWM CONTROLLER WITH INTEGRATED MOSFET DR - Rail/Tube |
| MCP1640 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:0.65V Start-up Synchronous Boost Regulator with True Output Disconnect or Input/Output Bypass Option |
| MCP1640_11 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:0.65V Start-up Synchronous Boost Regulator with True Output Disconnect or Input/Output Bypass Option |
发布紧急采购，3分钟左右您将得到回复。