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参数资料
| 型号： | MAX1802EHJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/28页 |
| 文件大小： | 0K |
| 描述： | IC PWR SPLY STEP DOWN 32-TQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 360 |
| 应用： | 控制器，数字式相机 |
| 输入电压： | 2.5 V ~ 11 V |
| 输出数： | 5 |
| 输出电压： | 1.25 V ~ 5.5 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-TQFP |
| 供应商设备封装： | 32-TQFP（5x5） |
| 包装： | 托盘 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
Digital Camera Step-Down
Power Supply
Pin Description (continued)
PIN
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
NAME
COMP2
DCON2
DL2
DL3
COMP3
FB3
DCON3
ONC
PGND
LXC
VDDC
VL
COMPC
FBC
REF
GND
FUNCTION
Compensation for Auxiliary Controller 2. Output of auxiliary controller 2 transconductance error
amplifier. Connect a series resistor and capacitor from COMP2 to GND to compensate the auxiliary
controller 2 control loop (see Compensation Design ).
Maximum Duty Cycle Control Input for Auxiliary Controller 2. Connect DCON2 to VL to set the default
maximum duty cycle. Connect a resistive voltage-divider from REF to DCON2 to set the maximum
duty cycle between 40% and 90%. Pull DCON2 below 300mV to turn the controller off.
External MOSFET Gate Drive Output for Auxiliary Controller 2. DL2 swings between VDDC and PGND
with 400mA (typ) drive current. Connect DL2 to the gate of the external switching N-channel MOSFET
for auxiliary controller 2.
External MOSFET Gate Drive Output for Auxiliary Controller 3. DL3 swings between VDDC and PGND
with 400mA (typ) drive current. Connect DL3 to the gate of the external switching N-channel MOSFET
for auxiliary controller 3.
Compensation for Auxiliary Controller 3. Output of auxiliary controller 3 transconductance error
amplifier. Connect a series resistor and capacitor from COMP3 to GND to compensate the auxiliary
controller 3 control loop (see Compensation Design ).
Feedback Input for Auxiliary Controller 3. Connect a feedback resistive voltage-divider from the
output of auxiliary controller 3 to FB3 to set the output voltage. Regulation voltage is V REF (1.25V).
Maximum Duty Cycle Control Input for Auxiliary Controller 3. Connect DCON3 to VL to set the default
maximum duty cycle. Connect a resistive voltage-divider from REF to DCON3 to set the maximum
duty cycle between 40% and 90%. Pull DCON3 below 300mV to turn the controller off.
Core Converter Enable Input. High level turns on the core converter. Connect ONC to VL to
automatically start the core converter.
Power Ground. Sources of internal N-channel MOSFET power switches. Connect PGND to GND as
close to the IC as possible.
Core Power Switching Node. Drains of the internal P- and N-channel MOSFET switches for the core
converter.
Core DC-DC Converter Power Input. VDDC is connected to the source of the internal P-channel
MOSFET power switch for the core converter. VDDC is limited to 5.5V. For battery voltages greater
than 5.5V, connect VDDC to the main output. Bypass VDDC to PGND with a 1 μ F or greater ceramic
capacitor.
Internal Low-Voltage Bypass. The internal circuitry is powered from VL. An internal linear regulator
powers VL from VDDM when VDDC is less than 2.4V. When VDDC is greater than 2.4V, an internal
switch connects VL to VDDC. Bypass VL to GND with a 1.0 μ F or greater ceramic capacitor.
Compensation for Core Converter. Output of core transconductance error amplifier. Connect a series
resistor and capacitor to GND to compensate the core control loop (see Compensation Design ).
Core DC-DC Converter Feedback Input. Connect a feedback resistive voltage-divider from the core
output to FBC to set the output voltage. Regulation voltage is V REF (1.25V).
1.25V Reference Output. Bypass REF to GND with a 0.1 μ F or greater ceramic capacitor.
Analog Ground
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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+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 |
| MAX1804EUB+ | 功能描述:电流和电力监控器、调节器 Feedback Integrator for Power Supply 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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