- 您现在的位置：买卖IC网 > PDF目录1849 > MAX8792ETD+T (Maxim Integrated Products)IC PWM CTRLR STEP-DWN 14TDFN PDF资料下载
参数资料
| 型号： | MAX8792ETD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/28页 |
| 文件大小： | 0K |
| 描述： | IC PWM CTRLR STEP-DWN 14TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 应用： | PWM 控制器 |
| 输入电压： | 2 V ~ 26 V |
| 电源电压： | 4.5 V ~ 5.5 V |
| 电流 - 电源： | 700µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x3） |
| 包装： | 标准包装 |
| 其它名称： | MAX8792ETD+TDKR |
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页第20页当前第21页第22页第23页第24页第25页第26页第27页第28页
Single Quick-PWM Step-Down
Controller with Dynamic REFIN
( R ESR + R PCB ) ≤ Δ I
? ? ( V IN OUT ) V OUT ? ?
R ESR ≤ ? ? V RIPPLE
Foldback Current Limit
Including an additional resistor between ILIM and the
output automatically creates a current-limit threshold that
folds back as the output voltage drops (see Figure 7).
The foldback current limit helps limit the inductor cur-
rent under fault conditions, but must be carefully
designed in order to provide reliable performance
under normal conditions. The current-limit threshold
must not be set too low, or the controller will not reliably
power up. To ensure the controller powers up properly,
the minimum current-limit threshold (when V OUT = 0V)
must always be greater than the maximum load during
startup (which at least consists of leakage currents),
plus the maximum current required to charge the out-
put capacitors:
I START = C OUT x 1mV/μs + I LOAD(START)
Output Capacitor Selection
The output filter capacitor must have low enough effec-
tive series resistance (ESR) to meet output ripple and
load-transient requirements. Additionally, the ESR
impacts stability requirements. Capacitors with a high
ESR value (polymers/tantalums) will not need additional
external compensation components.
In core and chipset converters and other applications
where the output is subject to large load transients, the
output capacitor’s size typically depends on how much
ESR is needed to prevent the output from dipping too
low under a load transient. Ignoring the sag due to
finite capacitance:
V STEP
LOAD ( MAX )
In low-power applications, the output capacitor’s size
often depends on how much ESR is needed to maintain
an acceptable level of output ripple voltage. The output
ripple voltage of a step-down controller equals the total
inductor ripple current multiplied by the output capaci-
tor’s ESR. The maximum ESR to meet ripple require-
ments is:
? V IN f SW L ?
? V
where f SW is the switching frequency.
5V BIAS
SUPPLY
C1
1 μ F
2
V DD
TON
BST
7
6
R TON
100k Ω
CBST
C IN
PWR
INPUT
4V TO 12V
AGND
C2
1 μ F
R10
PWR
13
V CC
DH
LX
5
4
0.1 μ F
L1
OUTPUT
1.50V 10A
1.05V 7A
ON OFF
GND/OPEN/REF/V DD
100k Ω
14
1
12
PGOOD
EN MAX8792
SKIP
DL
FB
3
8
PWR
C OUT
PWR
C3
AGND
1000pF
R1
11
REF
R8
100k Ω
AGND
R3
97.6k Ω
49.9k Ω
R2
54.9k Ω
10
REFIN
GND
ILIM
(EP)
9
R4
100k Ω
R5
100k Ω
REF
LO
HI
AGND
AGND
AGND
PWR
SEE TABLE 1 FOR COMPONENT SELECTION.
Figure 7. Standard Application with Foldback Current-Limit Protection
______________________________________________________________________________________
21
相关PDF资料 |
PDF描述 |
|---|---|
| MAX8794ETB+T | IC DDR LINEAR REG 10-TDFN |
| MAX8795AETJ+C7P | IC TFT-LCD DC/DC CONV 32-TQFN |
| MAX8798ETX+T | IC INTERNAL-SW BOOST REG 36-TQFN |
| MAX8804VETA+T | IC USB/AC ADP CHARGER 8TDFN-EP |
| MAX8804YETA+T | IC USB/AC ADP CHARGER 8-TDFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8792EVKIT+ | 功能描述:电源管理IC开发工具 MAX8792 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX8794ETB/V+T | 功能描述:低压差稳压器 - LDO Low-Voltage DDR Linear Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8794ETB+ | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE DDR LINEAR REGULATOR - Rail/Tube |
| MAX8794ETB+T | 功能描述:低压差稳压器 - LDO Low-Voltage DDR Linear Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8795AETJ+ | 功能描述:直流/直流开关转换器 TFT-LCD 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 |
发布紧急采购，3分钟左右您将得到回复。