- 您现在的位置：买卖IC网 > PDF目录1839 > MAX1708EEE+T (Maxim Integrated Products)IC REG BST 3.3V/5V/ADJ 5A 16QSOP PDF资料下载
参数资料
| 型号： | MAX1708EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/14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： | 2,500 |
| 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： | 带卷 (TR) |
| 供应商设备封装： | 16-QSOP |
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
L1
V IN
2.2 μ H
KEEP TRACES
SHORT AND WIDE
D1
V OUT
+5V
GND
C1
150 μ F
ON/OFF
CONTROL
R1
O NA
ONB
LX
LX
LX
CLK
R2
2 Ω
C2
150 μ F
GND
3.3/5
C3
SS/LIM
MAX1708
OUT
C5
C4
0.1 μ F
KEEP TRACES
SHORT AND WIDE
Figure 1. Standard Operating Circuit
0.22 μ F
REF
GND
PGND PGND PGND
FB
GND
_______________Detailed Description
The MAX1708 step-up converter offers high efficiency
and high integration for high-power applications. It
operates with an input voltage as low as 0.7V and is
suitable for single- to 3-cell battery inputs, as well as
2.5V or 3.3V regulated supply inputs. The output volt-
age is preset to 3.3V or 5.0V or can be adjusted with
external resistors for voltages between 2.5V to 5.5V.
The MAX1708 internal N-channel MOSFET switch is
rated for 5A (RMS value) and can deliver loads to 2A,
depending on input and output voltages. For flexibility,
the current limit and soft-start rate are independently
programmable.
A 600kHz switching frequency allows for a small induc-
tor to be used. The switching frequency is also syn-
chronizable to an external clock ranging from 350kHz
to 1MHz.
ONA, ONB
The logic levels at ONA and ONB turn the MAX1708 on
or off. When ONA = 1 or ONB = 0, the device is on.
When ONA = 0 and ONB = 1, the device is off (Table
1). Logic high on-control can be implemented by con-
necting ONB high and using ONA for shutdown.
Implement inverted single-line on/off control by ground-
ing ONA and toggling ONB . Implement momentary
pushbutton on/off as described in the Applications
Information section. Both inputs have approximately
0.15V of hysteresis.
Switching Frequency
The MAX1708 switches at the fixed-frequency internal
oscillator rate (600kHz) or can be synchronized to an
external clock. Connect CLK to OUT for internal clock
operation. Apply a clock signal to CLK to synchronize
to an external clock. The MAX1708 will synchronize to a
new external clock rate in two cycles and will take
approximately 40μs to revert to its internal clock fre-
quency once the external clock pulses stop and CLK is
driven high. Table 2 summarizes oscillator operation.
Operation
The MAX1708 switches at a constant frequency
(600kHz) and modulates the MOSFET switch pulse
width to control the power transferred per cycle and
regulate the voltage across the load. In low-noise appli-
cations, the fundamental and the harmonics generated
by the fixed switching frequency are easily filtered out.
Figure 2 shows the simplified functional diagram for the
MAX1708. Figure 3 shows the simplified PWM con-
_______________________________________________________________________________________
9
相关PDF资料 |
PDF描述 |
|---|---|
| MAX17094ETM+T | IC REG BOOST ADJ 1A 7OUT 48TQFN |
| MAX1709ESE | IC REG BST 3.3V/5V/ADJ 4A 16SOIC |
| MAX17100ETM+T | IC REG BOOST INT-SWITCH 48-TQFN |
| MAX17101ETJ+T | IC REG CTRLR DIV PWM CM 32TQFNEP |
| MAX17108ETI+T | IC LEVEL SHIFTER 10CH 28TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAX17094AETM+ | 制造商:Maxim Integrated Products 功能描述:5GHZ 4-CHANNEL MIMO TRANSMITTER - Rail/Tube |
| MAX17094ETM+ | 功能描述:电流和电力监控器、调节器 Boost Regulator w/7Ch Driver RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX17094ETM+T | 功能描述:电流和电力监控器、调节器 Boost Regulator w/7Ch Driver RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。