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参数资料
| 型号： | MAX849ESE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC DC-DC CONV LN HP 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 转换器，RF 数据链路 |
| 输入电压： | 0.7 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 3.3V，2.7 V ~ 5.5 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
1-Cell to 3-Cell, High-Power,
Low-Noise, Step-Up DC-DC Converters
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NAME
AIN1
AIN2
REF
GND
OUT
POKIN
FB
POK
AINSEL
DATA
CLK/SEL
PGND
LX
POUT
ON2
ON1
FUNCTION
ADC’s Channel 1 Input. Analog input voltage range is 0.625V to 1.875V.
ADC’s Channel 2 Input. Analog input voltage range is 0V to 2.5V.
Reference Output. Bypass with a 0.22μF capacitor to GND.
Ground. Use for low-current ground paths. Connect to PGND with a short trace.
Output Sense Input. The IC is powered from OUT. Bypass to GND with a 0.1μF ceramic capacitor. Connect
OUT to POUT through a 10 ? series resistor.
Power-Good Comparator Input. Connect to GND for fixed threshold (V OUT x 0.9). To adjust the threshold,
connect to a resistor divider from OUT to GND.
Dual Mode DC-DC Converter Feedback Input. Connect to GND for fixed 3.3V output voltage. Connect to
a resistor divider from OUT to GND to adjust the output voltage. Minimize noise coupling from switching
signals to FB.
Power-Good Output. This open-drain output is pulled low when the output voltage (V OUT ) drops below
the internally set threshold (fixed threshold), or when the voltage at POKIN drops below V REF (adjustable
threshold).
ADC’s Input Channel Selector. Pull low to select AIN1 and drive high to select AIN2.
ADC’s Serial Output. Pulsed output, RZ format. Full scale is f OSC /2 (f CLK /2 in external sync mode). The
DATA output is low when V CLK/SEL = 0V (PFM mode).
External Clock Input/Regulator’s Switching Mode Selector.
CLK/SEL = low: low-power, low-quiescent PFM mode. Delivers 100mW of output power.
CLK/SEL = high: low-noise, high-power PWM mode, switching at a constant frequency (300kHz).
CLK/SEL = driven with external clock: low-noise, high-power, synchronized PWM mode. The internal
oscillator is synchronized to the external clock (200kHz ~ 400kHz). Turning the DC-DC converter on with
V CLK/SEL = 0V also serves as a soft-start function, since the peak inductor current is limited to 30% of the
nominal value.
Source of the Internal N-Channel Power MOSFET. Connect to high-current ground path.
Drain of the Internal N-Channel Power MOSFET and P-Channel Synchronous Rectifier
Source of the Internal P-Channel Synchronous Rectifier MOSFET. Connect an external Schottky diode from
LX to POUT. Bypass to PGND with a 0.1μF ceramic capacitor as close to the IC as possible.
OFF Control Input. When ON1 = 0 and ON2 = 1, the IC is off.
ON Control Input. When ON1 = 1 or ON2 = 0, the IC is on.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX849ESE+ | 功能描述:直流/直流开关转换器 1-3 Cell 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 |
| MAX849ESE+T | 功能描述:直流/直流开关转换器 1-3 Cell 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 |
| MAX849ESE-T | 功能描述:直流/直流开关转换器 1-3 Cell 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 |
| MAX849EVKIT | 功能描述:直流/直流开关转换器 1-Cell to 3-Cell 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 |
| MAX849EVKIT-SO | 功能描述:直流/直流开关转换器 Evaluation Kit for the MAX848 MAX849 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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