- 您现在的位置：买卖IC网 > PDF目录16702 > MAX1533AETJ+T (Maxim Integrated Products)IC POWER SUPPLY CONTROLER 32TQFN PDF资料下载
参数资料
| 型号： | MAX1533AETJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 20/38页 |
| 文件大小： | 0K |
| 描述： | IC POWER SUPPLY CONTROLER 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 电源控制器 |
| 输入电压： | 4.5 V ~ 26 V |
| 电流 - 电源： | 15µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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页第13页第14页第15页第16页第17页第18页第19页当前第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页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页
High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
Table 3. Operating Modes
MODE
Shutdown Mode
Standby Mode
Normal Operation
3.3V SMPS Active
5V SMPS Active
Normal Operation
(Delayed 5V SMPS
Startup)
Normal Operation
(Delayed 3.3V
SMPS Startup)
SHDN
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
INPUTS*
ON5
X
LOW
HIGH
LOW
HIGH
REF
HIGH
ON3
X
LOW
HIGH
HIGH
LOW
HIGH
REF
LDO5
OFF
ON
ON
ON
ON
ON
ON
LDO3
OFF
ON
ON
ON
ON
ON
ON
OUTPUTS
5V SMPS
OFF
OFF
ON
OFF
ON
ON
Power-up after
3.3V SMPS is in
regulation
ON
3V SMPS
OFF
OFF
ON
ON
OFF
ON
ON
Power-up after
5V SMPS is in
regulation
* SHDN is an accurate, low-voltage logic input with 1V falling-edge threshold voltage and 1.6V rising-edge threshold voltage. ON3
and ON5 are 3-level CMOS logic inputs, a logic-low voltage is less than 0.8V, a logic-high voltage is greater than 2.4V, and the mid-
dle logic level is between 1.9V and 2.1V (see the Electrical Characteristics table).
SMPS Enable Controls (ON3, ON5)
ON3 and ON5 control SMPS power-up sequencing.
ON3 or ON5 rising above 2.4V enables the respective
outputs. ON3 or ON5 falling below 1.6V disables the
respective outputs. Driving ON_ below 0.8V clears the
overvoltage, undervoltage, and thermal fault latches.
SMPS Power-Up Sequencing
Connecting ON3 or ON5 to REF forces the respective
outputs off while the other output is below regulation
and starts after that output regulates. The second SMPS
remains on until the first SMPS turns off, the device
shuts down, a fault occurs, or LDO5 goes into undervolt-
age lockout. Both supplies begin their power-down
sequence immediately when the first supply turns off.
Output Discharge (Soft-Shutdown)
When output discharge is enabled ( OVP pulled low)
and the switching regulators are disabled—by transi-
tions into standby or shutdown mode, or when an
output undervoltage fault occurs—the controller dis-
charges both outputs through internal 12 Ω switches,
until the output voltages decrease to 0.3V. This slowly
discharges the output capacitance, providing a soft-
damped shutdown response. This eliminates the slight-
ly negative output voltages caused by quickly
discharging the output through the inductor and low-
side MOSFET. When an SMPS output discharges to
0.3V, its low-side driver (DL_) is forced high, clamping
the respective SMPS output to GND. The reference
remains active to provide an accurate threshold and to
provide overvoltage protection. Both SMPS controllers
contain separate soft-shutdown circuits.
When output discharge is disabled ( OVP = V CC ), the low-
side drivers (DL_) and high-side drivers (DH_) are both
pulled low, forcing LX into a high-impedance state. Since
the outputs are not actively discharged by the SMPS con-
trollers, the output-voltage discharge rate is determined
only by the output capacitance and load current.
Fixed-Frequency, Current-Mode
PWM Controller
The heart of each current-mode PWM controller is a multi-
input, open-loop comparator that sums two signals: the
output-voltage error signal with respect to the reference
voltage and the slope-compensation ramp (Figure 3).
The MAX1533A/MAX1537A use a direct-summing con-
figuration, approaching ideal cycle-to-cycle control over
the output voltage without a traditional error amplifier and
the phase shift associated with it. The MAX1533A/
MAX1537A use a relatively low loop gain, allowing the
use of low-cost output capacitors. The low loop gain
results in the -0.1% typical load-regulation error and
helps reduce the output capacitor size and cost by
shifting the unity-gain crossover frequency to a lower
level.
20
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| REC5-2409DRW/H6/C | CONV DC/DC 5W 18-36VIN +/-09VOUT |
| V375C36T75BL3 | CONVERTER MOD DC/DC 36V 75W |
| RBM24DSXS | CONN EDGECARD 48POS DIP .156 SLD |
| GBM18DRST | CONN EDGECARD 36POS DIP .156 SLD |
| V72C15E150BL3 | CONVERTER MOD DC/DC 15V 150W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1533ETJ | 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 |
| MAX1533ETJ+ | 功能描述:电流和电力监控器、调节器 PS Controllers for for Notebooks 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 |
| MAX1533ETJ+T | 功能描述:电流和电力监控器、调节器 PS Controllers for for Notebooks 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 |
| MAX1533ETJ-T | 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 |
| MAX1533EVKIT | 功能描述:电流和电力监控器、调节器 Evaluation Kit for the MAX1533 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。