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| 型号： | MAX1709ESE |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BST 3.3V/5V/ADJ 4A 16SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 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： | 350kHz ~ 1MHz |
| 电流 - 输出： | 4A |
| 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-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 16-SOIC |
| 其它名称： | Q1226679 |
4A, Low-Noise, High-Frequency,
Step-Up DC-DC Converter
Table 3. Component Selection Guide
PRODUCTION
Surface mount
INDUCTORS
Coilcraft DO3316P-102HC
Coiltronics UP2B-1R0
CAPACITORS
Panasonic EEFUE0J151R
Sanyo 6TPC100M
DIODES
Motorola MBRD1035CTL
STM-Microelectronics
STPS8L30B
Table 4. Component Suppliers
at a different frequency, scale the inductor value with
the inverse of frequency (L 1 = 1μH 600kHz / f SYNC ).
SUPPLIER
Coilcraft
Coiltronics
Motorola
Panasonic
STM-
Microelectronics
PHONE
847-639-6400
561-241-7876
602-303-5454
714-373-7939
617-259-0300
FAX
847-639-1489
561-241-9339
602-994-6430
714-373-7183
617-259-9442
The PWM design tolerates inductor values within ±25%
of this calculated value, so choose the closest standard
inductor value. For example, use 1.5μH for 350kHz and
0.68μH 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
begins to saturate and inductance falls) exceeds the
from its nominal value (see Electrical Characteristics). A
resistor (R1 in Figure 1) between SS/LIM and ground
reduces the current limit as follows:
internal current limit. Note that this current may be
reduced through SS/LIM if less than the MAX1709’s full
load current is needed (see Electrical Characteristics
R 1 = 312 . 5 k Ω ×
I 1
I LIM
( R 1 ≤ 312 . 5 k Ω )
for ratings). For highest efficiency, use a coil with low
DC resistance, preferably under 10m Ω . To minimize
radiated noise, use a toroid, pot core, or shielded
inductor. See Tables 3 and 4 for a list of recommended
I OUT ( MAX ) = D ' ? I LIM ? D ' ? OUT D IN ? ?
where I 1 is the desired current limit in amperes, and
I LIM is the current limit value from the Electrical
Characteristics.
Design Procedure
Inductor Selection (L1)
The MAX1709’s high switching frequency allows the
use of a small-size inductor. Use a 1.0μH inductor for
600kHz operation. If the MAX1709 will be synchronized
components and component suppliers. To calculate the
maximum output current (in amperes), use the following
equation:
? ? V + V ? V ? ?
? ? 2 × ? × L 1 ? ?
where:
V IN = input voltage
V IN
FB
REF
SLOPE
LX
COMP
R
S
Q
N
MAX1709
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
10
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1709ESE+ | 功能描述:直流/直流开关转换器 4A 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 |
| MAX1709ESE+T | 功能描述:直流/直流开关转换器 4A 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 |
| MAX1709ESE-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 |
| MAX1709EUI | 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 |
| MAX1709EUI/GG8 | 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 |
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