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参数资料
| 型号： | MAX8792ETD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/28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页当前第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
Single Quick-PWM Step-Down
Controller with Dynamic REFIN
5V BIAS
SUPPLY
AGND
C1
1 μ F
C2
1 μ F
R10
100k Ω
PWR
2
13
14
V DD
V CC
PGOOD
TON
BST
DH
LX
DL
7
6
5
4
3
R TON
332k Ω
C BST
0.1 μ F
L1
R6
13.0k Ω
C IN
PWR
C OUT
PWR
INPUT
7V TO 24V
OUTPUT
3.3V
5A (MAX)
ON OFF
GND/OPEN/REF/V DD
C3
1000pF
1
12
11
EN
SKIP
REF
MAX8792
FB
8
PWR
R7
20.0k Ω
AGND
AGND
10
REFIN
ILIM
9
R4
0 Ω
REF
GND
AGND
(EP)
PWR
R5
OPEN
AGND
SEE TABLE 1 FOR COMPONENT SELECTION.
Figure 4. High Output-Voltage Application Using a Feedback Divider
Output Voltages Greater than 2V
Although REFIN is limited to a 0 to 2V range, the out-
put-voltage range is unlimited since the MAX8792 uti-
lizes a high-impedance feedback input (FB). By adding
a resistive voltage-divider from the output to FB to ana-
log ground (Figure 4), the MAX8792 supports output
voltages above 2V. However, the controller also uses
FB to determine the on-time, so the voltage-divider
influences the actual switching frequency, as detailed
in the On-Time One-Shot section.
Internal Integration
An integrator amplifier forces the DC average of the FB
voltage to equal the target voltage. This internal amplifi-
er integrates the feedback voltage and provides a fine
adjustment to the regulation voltage (Figure 2), allowing
accurate DC output-voltage regulation regardless of the
compensated feedback ripple voltage and internal
slope-compensation variation. The integrator amplifier
has the ability to shift the output voltage by ±55mV (typ).
The MAX8792 disables the integrator by connecting the
amplifier inputs together at the beginning of all downward
REFIN transitions done in pulse-skipping mode. The inte-
grator remains disabled until 20μs after the transition is
completed (the internal target settles) and the output is in
regulation (edge detected on the error comparator).
Power-Good Outputs (PGOOD)
and Fault Protection
PGOOD is the open-drain output that continuously
monitors the output voltage for undervoltage and over-
voltage conditions. PGOOD is actively held low in shut-
down (EN = GND), during soft-start, and soft-shutdown.
Approximately 200μs (typ) after the soft-start termi-
nates, PGOOD becomes high impedance as long as
the feedback voltage is above the UVP threshold
(REFIN - 200mV) and below the OVP threshold (REFIN
+ 300mV). PGOOD goes low if the feedback voltage
drops 200mV below the target voltage (REFIN) or rises
300mV above the target voltage (REFIN), or the SMPS
controller is shut down. For a logic-level PGOOD output
______________________________________________________________________________________
17
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相关代理商/技术参数 |
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| 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 |
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