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| 型号： | MAX5072ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/27页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST ADJ 1A/2A 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 28 V |
| 输入电压： | 4.5 V ~ 23 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 200kHz ~ 2.2MHz |
| 电流 - 输出： | 1A，2A |
| 同步整流器： | 无 |
| 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 |
| 包装： | 管件 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
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页当前第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页第21页第22页第23页第24页第25页第26页第27页
2.2MHz, Dual-Output Buck or Boost
Converter with POR and Power-Fail Output
Pin Description (continued)
PIN
11
12
13, 14
15
16
17
18
19
20
21, 22
23
24
25
26, 27
NAME
OSC
V+
VL
BYPASS
MR
RST
COMP1
FB1
EN1
DRAIN1
BST1/VDD1
FSEL1
PGOOD1
SOURCE1
FUNCTION
Oscillator Frequency Set Input. Connect a resistor from OSC to SGND (R OSC ) to set the switching
frequency (see the Oscillator section). Set R OSC for equal to or lower oscillator frequency than the SYNC
input frequency when using external synchronization (0.2f SYNC < f OSC < 1.2f SYNC ). R OSC is still required
when an external clock is connected to the SYNC input.
Input Supply Voltage. V+ voltage range from 5.5V to 23V. Connect the V+ and VL together for 4.5V to
5.5V input operation. Bypass with a minimum 0.1μF ceramic capacitor to SGND.
Internal 5.2V Linear Regulator Output. Use VL to drive the high-side switch at BST1/VDD1 and
BST2/VDD2. Bypass VL with a 0.1μF capacitor to PGND and a 4.7μF ceramic capacitor to SGND.
2.0V Output. Bypass to SGND with a 0.22μF or greater ceramic capacitor.
Active-Low Manual Reset Input. Drive MR low to initiate a reset. RST remains asserted while MR is low
and for 180ms (t RP ) after MR returns high. MR requires no external debounce circuitry. MR is internally
pulled high by a 44k ? resistor and can be left open if not used.
Open-Drain Reset Output. RST remains low when either output voltage is below 92.5% of its regulation
point or while MR is low. After soft-start is completed and both outputs exceed 92.5% of their nominal
output voltage, RST becomes high impedance after a 180ms (typ) delay. RST remains high impedance
as long as both outputs maintain regulation.
Compensation Connection for Converter 1 (See the Compensation Section)
Feedback Input for Converter 1. Connect FB1 to a resistive divider between converter 1’s output and SGND
to program the output voltage. To set the output voltage below 0.8V, connect FB1 to a resistive voltage-
divider from BYPASS to regulator 1’s output (Figure 6). See the Setting the Output Voltage section.
Active-High Enable Input for Converter 1. Drive EN1 low to shut down converter 1, drive EN1 high for normal
operation. Use EN1 in conjunction with EN2 for supply sequencing. Connect to VL for always-on operation.
Connection to the Converter 1 Internal MOSFET Drain.
Buck converter operation—use the MOSFET as a high-side switch and connect DRAIN1 to the input supply.
Boost converter operation—use the MOSFET as a low-side switch and connect DRAIN1 to the inductor
and diode junction.
Buck Converter Operation—Bootstrap Flying-Capacitor Connection for Converter 1. Connect BST1/VDD1
to an external ceramic capacitor and diode according to the Standard Application Circuit (Figure 1).
Boost Converter Operation—Driver Bypass Capacitor Connection. Connect a low-ESR 0.1μF ceramic
capacitor from BST1/VDD1 to PGND (Figure 9).
Converter 1 Frequency Select Input. Connect FSEL1 to VL for normal operation. Connect FSEL1 to SGND
to reduce converter 1’s switching frequency to 1/2 converter 2’s switching frequency (converter 1
switching frequency will be 1/4 the SYNC frequency). Do not leave FSEL1 unconnected.
Converter 1 Power-Good Output. Open-drain output goes low when converter 1’s output falls below
92.5% of its set regulation voltage. Use PGOOD1 and EN2 to sequence the converters.
Connection to the Converter 1 Internal MOSFET Source.
Buck Converter Operation—connect SOURCE1 to the switched side of the inductor as shown in Figure 1.
Boost Converter Operation—connect SOURCE1 to PGND.
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5072ETJ+ | 功能描述:直流/直流开关转换器 2.2MHz Buck or Boost 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 |
| MAX5072ETJ+T | 功能描述:直流/直流开关转换器 2.2MHz Buck or Boost 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 |
| MAX5072ETJ-T | 功能描述:直流/直流开关转换器 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 |
| MAX5072EVKIT | 功能描述:电源管理IC开发工具 2.2MHz Buck or Boost Converter 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 |
| MAX5073 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2.2MHz, Dual-Output Buck or Boost Converter with Internal Power MOSFETs |
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