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参数资料
| 型号： | MAX1973EUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1A 10UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.25 V ~ 5.5 V |
| 输入电压： | 2.6 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 1A |
| 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-µMAX |
Smallest 1A, 1.4MHz Step-Down Regulators
Typical Operating Characteristics (continued)
(Circuits of Figure 2, 3, and 4; T A = +25 ° C, unless otherwise noted.)
MAX1973
VOLTAGE MARGIN STEP CHANGE RESPONSE
MAX1973/74 toc14
MAX1974
POK AND INPUT VOLTAGE
MAX1973/74 toc15
V OUT
1V/div
V POK
2V/div
V CTL1
0
10V/div
0
V CTL2
I IN
0
10V/div
0
500mA/div
V OUT
V IN
1V/div
0
2V/div
0
1ms/div
V IN = 5V, VOUT = 2.5V, I OUT = 800mA, -4% TO +4% TO -4%
0
20ms/div
MAX1974 WITH 100k ? PULLUP RESISTOR
FROM POK TO IN, I LOAD = 100mA
Pin Description
PIN
NAME
MAX1973 MAX1974
FUNCTION
Feedback-Mode Selector. Connect FBSEL to GND to set the output voltage to 1.8V
1
FBSEL
FBSEL
(MAX1973) or 1V (MAX1974). Connect FBSEL to IN to set the output voltage to 2.5V
(MAX1973) or 1.5V (MAX1974). Leave FBSEL unconnected to set the output voltage
using a resistor-divider at FB.
Compensation. Connect a series RC network to GND. COMP is internally pulled to
2
COMP
COMP
GND when the device is in shutdown or in undervoltage lockout (see the Compen-
sation Components section).
3
FB
FB
Feedback Input. Connect to the output if a preset voltage is used, or to a resistor-
divider from the output to GND for an adjustable output voltage.
Soft-Start Pin and Reference Output. Bypass to GND with at least 0.01μF. Connect
4
SS
SS
0.1μF to GND for a soft-start ramp time of 6.25ms for the MAX1973, or 3.75ms for the
MAX1974. SS is internally pulled to GND when the device is shut down or in
undervoltage lockout.
5
6
7
8
9
10
GND
CTL2
—
PGND
LX
IN
CTL1
—
GND
—
POK
PGND
LX
IN
—
ON
Ground
Control Input 2. Controls enable/disable and voltage margining (see Table 1).
Power-OK Output. Open-drain output goes low when output is below 90% of nominal
output. POK is also low when the device is shut down or in undervoltage lockout.
Power Ground
Inductor Connection. Connect an inductor from LX to the output.
Input Supply Voltage. Input voltage range is 2.6V to 5.5V. Connect a 4.7μF capacitor
from IN to PGND.
Control Input 1. Controls Enable/Disable and voltage margining (see Table 1).
Enable Input. Connect to IN or drive high for normal operation. Drive low to put device
in shutdown.
8
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1973EVKIT | 功能描述:直流/直流开关调节器 Evaluation Kit for the MAX1973 MAX1974 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1974EUB | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1974EUB+ | 功能描述:直流/直流开关调节器 1A 1.4MHz Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1974EUB+T | 功能描述:直流/直流开关调节器 1A 1.4MHz Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1974EUB-G05 | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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