参数资料
| 型号： | MAX1801EKA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR DC-DC SOT23-8 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 控制器，数字式相机 |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 1 |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 带卷 (TR) |
Digital Camera Step-Up Slave
DC-DC Controller
FB
COMP
REF
DCON
OSC
REFI
LEVEL
SHIFT
SOFT-
START*
CLK
FAULT
R
S
Q
DL
*SOFT-START RAMPS REFI FROM 0 TO V REF IN 1024 CLK CYCLES.
PROTECTION
ENABLE
0.4V
POWER-ON
1.1V
IN
2.35V
IC
POWER
Figure 2. PWM Controller Block Diagram
Oscillator
The MAX1801 requires a 0 to 1.25V sawtooth oscillator
signal that is obtained from the MAX1800 or the
MAX1802 (at OSC). The 100kHz to 1MHz oscillator sig-
nal sets the converter switching frequency, and it is
used to control pulse-width modulation and maximum
duty cycle.
Maximum Duty Cycle
The MAX1801 uses the master-generated oscillator sig-
nal at OSC, the voltage at DCON, and an internal com-
parator to limit its maximum switching duty cycle (see
Setting the Maximum Duty Cycle ). Limiting the duty
cycle can prevent saturation in some magnetic compo-
nents. A low maximum duty cycle can also force the
converter to operate in discontinuous current mode,
simplifying design stability at the cost of a slight reduc-
tion in efficiency.
Soft-Start
The MAX1801 features a soft-start function that limits
inrush current and prevents excessive battery loading
at startup by ramping the output voltage to the regula-
tion voltage. This is achieved by increasing the internal
reference to the transconductance amplifier from 0 to
the 1.25V reference voltage over 1024 oscillator cycles
when initial power is applied or when the part is taken
out of shutdown or sleep mode.
8
_______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1802EHJ+ | IC PWR SPLY STEP DOWN 32-TQFP |
| MAX1804EUB+ | IC FEEDBACK INTERGRATOR 10UMAX |
| MAX1806EUA18+ | IC REG LDO 1.8V/ADJ .5A 8-UMAX |
| MAX1809ETI+ | IC DDR TERMINATION 28-TQFN |
| MAX1810ESA | IC REG SMART CARD NETWORK 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1802EHJ | 功能描述:直流/直流开关转换器 Step-Up Slave DC/DC Controller 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 |
| MAX1802EHJ+ | 功能描述:直流/直流开关转换器 Step-Up Slave DC/DC Controller 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 |
| MAX1802EHJ+T | 功能描述:直流/直流开关转换器 Step-Up Slave DC/DC Controller 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 |
| MAX1802EHJ-T | 功能描述:直流/直流开关转换器 Step-Up Slave DC/DC Controller 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 |
| MAX1804EUB | 功能描述:电流和电力监控器、调节器 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。