参数资料
| 型号： | MAX1801EKA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/16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
Typical Operating Characteristics (continued)
(Circuit of Figure 1, T A = +25 ° C, unless otherwise noted.)
OV
STARTUP RESPONSE
MAX1801 toc10
V DCON
5V/div
LOAD TRANSIENT RESPONSE
MAX1801 toc11
V OUT
V OUT
2V/div
100mV/div
(AC-COUPLED)
OV
500mA
I LOAD
0.2A/div
I IN
OA
1ms/div
0.5A/div
100mA
OA
V IN = =+2.4V, V OUT = +5V, f OSC = 500kHz
400 μ s/div
Pin Description
PIN
1
2
3
4
5
6
7
8
NAME
OSC
GND
REF
DCON
COMP
FB
IN
DL
FUNCTION
Oscillator Input. Connect OSC to OSC of the MAX1800 or MAX1802. The oscillator frequency must
be between 100kHz and 1MHz.
Ground
1.25V Reference Input. Connect REF to REF of the MAX1800 or MAX1802. REF must be above 1V
for the controller to turn on. Bypass REF to GND with a 0.1μF or greater capacitor.
Maximum Duty-Cycle Control Input. Connect to REF or IN to set the default maximum duty cycle.
Connect a resistive voltage-divider from REF to DCON to set the maximum duty cycle between 40%
and 90%. Pull DCON below 0.35V to turn the controller off.
Controller Compensation. Output of transconductance error amplifier. Connect a series resistor and
capacitor to GND to compensate the control loop. See Compensation Design .
Controller Feedback Input. Connect a feedback resistive voltage-divider from the output to FB to
set the output voltage. Regulation voltage is V REF (1.25V).
IC Supply Bias Input. Bypass IN to GND with a 0.1μF or greater ceramic capacitor. Supply range is
2.7V to 5.5V.
External MOSFET Gate Drive Output. DL swings between IN and GND with typical 500mA drive
current. Connect DL to the gate of the external switching N-channel MOSFET.
6
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| 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 |
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