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| 型号： | MAX1644EAE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/11页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 2A 16SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 76 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.1 V ~ 5.5 V |
| 输入电压： | 3 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 最高 350kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.209"，5.30mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 16-SSOP |
| 产品目录页面： | 1410 (CN2011-ZH PDF) |
2A, Low-Voltage, Step-Down Regulator with
Synchronous Rectification and Internal Switches
Typical Operating Characteristics (continued)
(Circuit of Figure 1, T A = +25°C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE
4V
V IN
3V
V OUT
20mV/div
LINE-TRANSIENT RESPONSE
V OUT = 1.5V, I OUT = 2A
20 μ s/div
2A
I L
0
V OUT
50mV/div
(FBSEL = REF)
V IN = 3.3V, V OUT = 1.5V
20 μ s/div
Pin Description
PIN
1
2, 4
3, 14, 16
5
6
7
8
9
10
11
12
13, 15
NAME
SHDN
IN
LX
SS
COMP
TOFF
FB
GND
REF
FBSEL
V CC
PGND
FUNCTION
Shutdown Control Input. Drive SHDN low to disable the reference, control circuitry, and internal
MOSFETs. Drive high or connect to V CC for normal operation.
Supply Voltage Input for the internal PMOS power switch
Connection for the drains of the PMOS power switch and NMOS synchronous-rectifier switch. Connect
the inductor from this node to output filter capacitor and load.
Soft-Start. Connect a capacitor from SS to GND to limit inrush current during start-up.
Integrator Compensation. Connect a capacitor from COMP to V CC for integrator compensation. See the
Integrator Amplifier section.
Off-Time Select Input. Sets the PMOS power switch off-time during constant-off-time operation. Connect a
resistor from TOFF to GND to adjust the PMOS switch off-time.
Feedback Input for both preset-output and adjustable-output operating modes. Connect directly to
output for fixed-voltage operation or to a resistor-divider for adjustable operating modes.
Analog Ground
Reference Output. Bypass REF to GND with a 1μF capacitor.
Feedback Select Input. Selects AC load-regulation error and output voltage. See Table 2 for program-
ming instructions.
Analog Supply Voltage Input. Supplies internal analog circuitry. Bypass V CC with a 10 Ω and 2.2μF low-
pass filter. See Figure 1.
Power Ground. Internally connected to the internal NMOS synchronous-rectifier switch.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1644EAE/GH9 | 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 |
| MAX1644EAE/GH9-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 |
| MAX1644EAE+ | 功能描述:直流/直流开关转换器 2A Step-Dow w/Synch Rectification 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 |
| MAX1644EAE+T | 功能描述:直流/直流开关转换器 2A Step-Dow w/Synch Rectification 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 |
| MAX1644EAE+TG116 | 制造商:Maxim Integrated Products 功能描述:2A, LOW-VOLTAGE, STEP-DOWN REGULATOR WITH SYNCHRONOUS RECTIF - Tape and Reel |
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