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参数资料
| 型号： | MAX1957EUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 360kHz |
| 占空比： | 96% |
| 电源电压： | 3 V ~ 5.5 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
Low-Cost, High-Frequency, Current-Mode PWM
Buck Controller
Pin Description
MAX1953
PIN
MAX1954
MAX1957
NAME
FUNCTION
ILIM Sets the Current-Limit Threshold for the Low-Side N-Channel
1
—
—
ILIM
MOSFET, as well as the Current-Sense Amplifier Gain. Connect to IN
for 320mV, leave floating for 210mV, or connect to GND for 105mV
current-limit threshold.
HSD Senses the Voltage at the Drain of the High-Side N-Channel
—
1
—
HSD
MOSFET. Connect to the high-side MOSFET drain using a Kelvin
connection.
REFIN Sets the FB Regulation Voltage. Drive REFIN with the desired
—
—
1
REFIN
FB regulation voltage using an external resistor-divider. Bypass to
GND with a 0.1μF capacitor.
2
3
2
3
2
3
COMP
FB
Compensation and Shutdown Control Pin. Connect an RC network to
compensate control loop. Drive to GND to shut down the IC.
Feedback Input. Regulates at V FB = 0.8V (MAX1953/MAX1954) or
REFIN (MAX1957). Connect FB to a resistor-divider to set the output
voltage (MAX1953/MAX1954). Connect to output through a decoupling
resistor (MAX1957).
4
4
4
GND
Ground
Input Voltage (3V to 5.5V). Provides power for the IC. For the
MAX1953/MAX1957, IN serves as the current-sense input for the high-
side MOSFET. Connect to the drain of the high-side MOSFET
5
5
5
IN
(MAX1953/MAX1957). Bypass IN to GND close to the IC with a
0.22μF (MAX1954) capacitor. Bypass IN to GND close to the IC with
10μF and 4.7μF in parallel (MAX1953/MAX1957) capacitors. Use
ceramic capacitors.
6
7
8
6
7
8
6
7
8
DL
PGND
DH
Low-Side Gate-Drive Output. Drives the synchronous-rectifier MOSFET.
Swings from PGND to V IN .
Power Ground. Connect to source of the synchronous rectifier close to
the IC.
High-Side Gate-Drive Output. Drives the high-side MOSFET. DH is a
floating driver output that swings from V LX to V BST .
Master Controller Current-Sense Input. Connect LX to the junction of
9
9
9
LX
the MOSFETs and inductor. LX is the reference point for the current
limit.
10
10
10
BST
Boost Capacitor Connection for High-Side Gate Driver. Connect a
0.1μF ceramic capacitor from BST to LX and a Schottky diode to IN.
8
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX19586ETN | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX19586ETN+D | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX19586ETN+TD | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX19586ETN-D | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX19586ETN-TD | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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