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| 型号： | MAX1858AEEG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 24-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 660kHz |
| 电源电压： | 4.5 V ~ 23 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
Dual 180° Out-of-Phase Buck Controllers with
Sequencing/Prebias Startup and POR
Pin Description
PIN
NAME
FUNCTION
Compensation Pin for Regulator 2 (REG2). Compensate REG2’s control loop by connecting a series resistor
1
COMP2 (R COMP2 ) and capacitor (C COMP2A ) to GND in parallel with a second compensation capacitor (C COMP2B ) as
shown in Figure 1.
Feedback Input for Regulator 2 (REG2). Connect FB2 to a resistive divider between REG2’s output and GND to
2
3
4
5
6
7
8
9
10
11
FB2
ILIM2
OSC
V+
REF
GND
CKO
SYNC
ILIM1
FB1
adjust the output voltage between 1V and 18V. To set the output voltage below 1V, connect FB2 to a resistive
voltage-divider from REF to REG2’s output. See the Setting the Output Voltage section.
Current-Limit Adjustment for Regulator 2 (REG2). The PGND–LX2 current-limit threshold defaults to 100mV if
ILIM2 is connected to V L . Connect a resistor (R ILIM2 ) from ILIM2 to GND to adjust the REG2’s current-limit
threshold (V ITH2 ) from 50mV (R ILIM2 = 100k ? ) to 300mV (R ILIM2 = 600k ? ). See the Setting the Valley Current
Limit section.
Oscillator Frequency Set Input. Connect a resistor from OSC to GND (R OSC ) to set the switching frequency from
100kHz (R OSC = 60k ? ) to 600kHz (R OSC = 10k ? ). The controller still requires R OSC when an external clock is
connected to SYNC. When using an external clock, select R OSC as described above, and set the external clock
frequency to twice the desired switching frequency.
Input Supply Voltage. 4.5V to 23V.
2V Reference Output. Bypass to GND with a 0.22μF or greater ceramic capacitor.
Analog Ground
Clock Output. Clock output for external 2- or 4-phase synchronization (see the Clock Synchronization (SYNC,
CKO) section).
Synchronization Input or Clock Output Selection Input. SYNC has three operating modes. Connect SYNC to a
200kHz to 1200kHz clock for external synchronization. Connect SYNC to GND for 2-phase operation as a master
controller. Connect SYNC to V L for 4-phase operation as a master controller (see the Clock Synchronization
(SYNC, CKO) section).
Current-Limit Adjustment for Regulator 1 (REG1). The PGND–LX1 current-limit threshold defaults to 100mV if
ILIM1 is connected to V L . Connect a resistor (R ILIM1 ) from ILIM1 to GND to adjust REG1’s current-limit threshold
(V ITH1 ) from 50mV (R ILIM1 = 100k ? ) to 300mV (R ILIM1 = 600k ? ). See the Setting the Valley Current Limit section.
Feedback Input for Regulator 1 (REG1). Connect FB1 to a resistive divider between REG1’s output and GND to
adjust the output voltage between 1V and 18V. To set the output voltage below 1V, connect FB1 to a resistive
voltage-divider from REF and REG1’s output. See the Setting the Output Voltage section.
Compensation Pin for Regulator 1 (REG1). Compensate REG1’s control loop by connecting a series resistor
12
COMP1 (R COMP1 ) and capacitor (C COMP1A ) to GND in parallel with a second compensation capacitor (C COMP1B ) as
shown in Figure 1.
Open-Drain Reset Output (MAX1858A/MAX1876A Only). RST is low when either output voltage is more than 10%
below its regulation point. After soft-start is completed and both outputs exceed 90% of their nominal output
13
RST
N.C.
voltage (V FB _ > 0.9V), RST becomes high impedance after a 140ms delay and remains high impedance as long
as both outputs maintain regulation. Connect a resistor between RST and the logic supply for logic-level
voltages.
Connect to GND or leave unconnected for the MAX1875A.
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1858AEEG+ | 功能描述:电压模式 PWM 控制器 Dual 180 Out Buck Controllers RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX1858AEEG+T | 功能描述:电压模式 PWM 控制器 Dual 180 Out Buck Controllers RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX1858AEEG-T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1858EEG | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1858EEG+ | 功能描述:电压模式 PWM 控制器 Dual 180 Out Buck Controllers RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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