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| 型号： | MAX1708EEE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | IC REG BST 3.3V/5V/ADJ 5A 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 升压（升压） |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 3.3V，5V，可调 |
| 输入电压： | 0.7 V ~ 5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 600kHz |
| 电流 - 输出： | 5A |
| 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： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 16-QSOP |
| 产品目录页面： | 1410 (CN2011-ZH PDF) |
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
Table 3. Component Selection Guide
PRODUCTION
Surface mount
INDUCTORS
Coiltronics UP2B-2R2
Coilcraft DO3316P-222HC
CAPACITORS
Sanyo 6TPC100M
Panasonic EEFUE0J151R
DIODES
Motorola MBRD1035CTL
Central CMSH5-20
Table 4. Component Suppliers
internal current limit. Note that this current may be
reduced through SS/LIM if less than the MAX1708’s full
SUPPLIER
Central
Coilcraft
Coiltronics
Motorola
Panasonic
PHONE
631-435-1110
847-639-6400
561-241-7876
602-303-5454
714-373-7939
FAX
631-435-1824
847-639-1489
561-241-9339
602-994-6430
714-373-7183
load current is needed (see Electrical Characteristics
for ratings). For highest efficiency, use a coil with low
DC resistance, preferably under 20m Ω . To minimize
radiated noise, use a toroid, pot core, or shielded
inductor. See Tables 3 and 4 for a list of recommended
components and component suppliers. To calculate
the maximum output current (in amperes), use the fol-
lowing equation:
I OUT ( MAX ) = D ' ? I LIM ? D ' ? OUT D IN ? ?
__________________Design Procedure
Inductor Selection (L1)
The MAX1708’s high switching frequency allows the
use of a small-size inductor. Use a 2.2μH inductor for
600kHz operation. If the MAX1708 is synchronized at a
different frequency, scale the inductor value with the
inverse of frequency (L 1 = 2.2μH ? 600kHz / f SYNC ).
The PWM design tolerates inductor values within ±25%
of this calculated value, so choose the closest standard
inductor value. For example, use 3.3μH for 350kHz and
1.5μH for 1MHz).
Inductors with a ferrite core or equivalent are recom-
mended; powder iron cores are not recommended for
use at high switching frequencies. Ensure the induc-
tor’s saturation rating (the current at which the core
? ? V + V ? V ? ?
? ? 2 × ? × L 1 ? ?
where:
V IN = input voltage
V D = forward voltage drop of the Schottky diode
at I LIM
V OUT = output voltage
D' = (V IN ) / (V OUT + V D ), neglecting switch voltage
drop
f = switching frequency
L1 = inductor value
I LIM = minimum value of switch current limit from
Electrical Characteristics or set by R1 of
Figure 1.
begins to saturate and inductance falls) exceeds the
V IN
FB
REF
SLOPE
LX
COMP
R
Q
S
N
MAX1708
LX
R4
V OUT
SS/LIM
12.5
11m Ω
FB
(LIMITED TO 100mV)
OSCILLATOR
PGND
KEEP SHORT
R3
Figure 3. Simplified PWM Controller Functional Diagram
Figure 4. Adjustable Output Voltage
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1708EEE+ | 功能描述:直流/直流开关转换器 High f Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1708EEE+T | 功能描述:直流/直流开关转换器 High f Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1708EEE-T | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1708EVKIT | 功能描述:直流/直流开关转换器 Evaluation Kit for the MAX1708 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1708EVKIT+ | 功能描述:直流/直流开关转换器 High-Frequency High-Power Low-Noise Step-Up DC-DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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