参数资料
型号: LT1301CS8#TRPBF
厂商: Linear Technology
文件页数: 7/12页
文件大小: 0K
描述: IC REG BOOST 5V/12V 8SOIC
标准包装: 2,500
类型: 升压(升压)
输出类型: 固定
输出数: 1
输出电压: 5V,12V
输入电压: 1.8 V ~ 10 V
PWM 型: Burst Mode?
同步整流器:
工作温度: 0°C ~ 70°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
LT1301
APPLICATIO N S I N FOR M ATIO N
Table 1. Recommended Inductors
PART NUMBER
DO3316-333
VENDOR
Coilcraft
L ( μ H) DCR ( ? ) V IN (V)
33 0.088 3.3
I LIM PIN
Open
EFFICIENCY (%)
30mA 60mA 120mA
84 84 85
COMPONENT
HEIGHT (mm)
5.5
PHONE NUMBER
(708) 639–6400
5
Open
89 89 90
DO1608-223 Coilcraft 22 .31 3.3
3.3
5
5
DO1608-103 Coilcraft 10 .11 2
Open
Ground
10k
Ground
Open
82 82 —
85 — —
86 87 —
88 — —
78 — —
3.5
3.5
CTX20-1 Coiltronics 20 .175 3.3
5
GA10-332 Gowanda 33 .077 3.3
5
LQH3G220K04M00 Murata-Erie 22 0.7 3.3
5
CD73-330KC Sumida 33 0.131 3.3
5
CDRH62-330MC Sumida 33 0.48 3.3
Open
Open
Open
Open
Ground
Ground
Open
Open
Open
84 84 —
88 88 89
86 86 87
89 89 90
81 — —
85 — —
84 85 86
88 88 89
80 80 81
4.2
Through-Hole
2.0
3.5
3.0
(407) 241-7876
(716) 532-2234
(404) 436-1300
(708) 956-0666
Ground
85 — —
5
Open
84 84 85
Ground
switching. Zero load current causes the LT1301 to switch
83 — —
Table 2. Recommended Capacitors
so infrequently that C3 can completely discharge reducing
subsequent peak switch current to 400mA. If a load is
suddenly applied, output voltage will sag until C3 can be
recharged and peak switch current returns to 1A.
VENDOR
AVX
Sanyo
Panasonic
SERIES
TPS
OS-CON
HFQ
TYPE
Surface Mount
Through-Hole
Through-Hole
PHONE#
(803)448–9411
(619) 661–6835
(201) 348-5200
If the full capacity of the LT1301 is not required peak
current can be reduced by changing the value of R3 as
shown in Figure 8. With R3 = 0 switch current is limited to
approximately 400mA. Smaller, less expensive inductors
with lower saturation ratings can then be used.
Inductor Selection
For full output power, the inductor should have a satura-
tion current rating of 1.25A for worst-case current limit,
although it is acceptable to bias an inductor 20% or more
into saturation. Smaller inductors can be used in conjunc-
1100
1000
900
800
700
600
500
400
1.6V ≤ V IN ≤ 5V
tion with the I LIM pin. Efficiency is significantly affected by
inductor DCR. For best efficiency limit the DCR to 0.03 ?
or less. Toroidal types are preferred in some cases due to
300
100
1k 10k 100k 1M
CURRENT LIMIT SET RESISTOR ( ? )
LT1301 F8
their inherent flux containment and EMI/RFI superiority.
Figure 8. Peak Switch Current vs. Current Limit Set Resistor
Recommended inductors are listed in Table 1.
7
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