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| 型号： | MCP16321T-250E/NG |
| 厂商： | Microchip Technology |
| 文件页数： | 20/34页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 2.5V 1A 16-VQFN |
| 标准包装： | 3,300 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 2.5V |
| 输入电压： | 6 V ~ 24 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 1A |
| 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： | 带卷 (TR) |
| 供应商设备封装： | 16-QFN（3x3） |
| 其它名称： | MCP16321T-250E/NGTR |
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MCP16321/2
TABLE 5-1:
CAPACITOR VALUE RANGE
TABLE 5-2:
MCP16321 RECOMMENDED
Parameter
Min
Max
INDUCTORS
5.0.6
C OUT 33 μF
INDUCTOR SELECTION
None
Part
Number
Value
(μH)
DCR
( Ω )
I SAT
(A)
Size
WxLxH
(mm)
The MCP16321/2 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
should be used.
Coilcraft ?
1008PS
LPS4012
LPS4018
4.7
4.7
4.7
0.35
0.175
0.125
1.7
1.8
1.9
3.81x3.78x2.74
4.1x4.1x1.2
4.1x4.1x1.8
EQUATION 5-3:
INDUCTOR CURRENT
RIPPLE
LPS5015
MSS5121
LPS5030
4.7
4.7
4.7
0.15
0.095
0.083
1.8
1.66
2
5x5x1.5
5.1x5.1x2.2
5x5x3
Δ I L = ----- L - × t ON
V
L
MSS6122
MOS6020
4.7
4.7
0.065
0.05
1.82
1.94
6.1x6.1x2.2
6.8x6x2.4
Wurth Elektronik ?
EXAMPLE 5-3:
MCP16321 PEAK
INDUCTOR CURRENT – 1A
744042
744068
4.7
4.7
0.07
0.072
1.65
1.55
4.8x4.8x1.8
8x8x1.1
V IN = 12V
V OUT = 3.3V
I OUT = 1A
L = 4.7 μH
Δ IL
2
I LPK = --------- + IOUT
7448944
EPCOS ?
LTF5022T
VLC5020T
VLC6020T
VLCF5020T
VLF5014ST
4.7
4.7
4.7
4.7
4.7
4.7
0.0545
0.073
0.097
0.079
0.122
0.12
4.2
2
2
1.8
1.7
1.7
8x8x3.8
5.2x5x2.2
5x5x2
6x6x2
5x5x2
4.8x4.6x1.4
Inductor ripple current = 509 mA
Inductor peak current = 1.255A
TABLE 5-3:
MCP16322 RECOMMENDED
INDUCTORS
An inductor saturation rating minimum of 1.255A is
recommended. A trade-off between size, cost and
efficiency is made to achieve the desired results.
Part Number
Value
(μH)
DCR
( Ω )
I SAT
(A)
Size
WxLxH
(mm)
EXAMPLE 5-4:
V IN = 12V
V OUT = 3.3V
MCP16322 PEAK
INDUCTOR CURRENT – 2A
Coilcraft ?
MSS6132-472
LPS6225-472
MSS7341-502
DO1813H-472
4.7
4.7
4.7
4.7
0.056
0.065
0.024
0.054
2.84
3.2
3.16
2.6
6.1x6.1x3.2
6.2x6.2x2.5
7.3x7.3x4.1
8.89x6.1x5.0
I OUT = 2A
Wurth Elektronik ?
EPCOS
L = 4.7 μH
Δ IL
2
I LPK = --------- + IOUT
Inductor ripple current = 509 mA
Inductor peak current = 2.255A
7447785004
7447786004
7447789004
?
B82464G2
B82464A2
4.7
4.7
4.7
4.7
4.7
0.06
0.057
0.033
0.033
0.03
2.5
2.8
3.9
3.1
4.5
5.9x6.2x3.3
5.9x6.2x5.1
7.3x3.2x1.5
10.4x10.4x3.0
10.4x10.4x3.0
An inductor saturation rating minimum of 2.255A is
recommended. A trade-off between size, cost and
efficiency is made to achieve the desired results.
DS22285A-page 20
? 2011 Microchip Technology Inc.
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