参数资料
| 型号： | MAX1945REUI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 6A 28TSSOP |
| 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： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 1.8V，2.5V，可调 |
| 输入电压： | 2.6 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 400kHz ~ 1.2MHz |
| 电流 - 输出： | 6A |
| 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： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
1MHz, 1% Accurate, 6A Internal Switch
Step-Down Regulators
Typical Operating Characteristics (continued)
(V IN = V CC = 5V, V OUT = 1.8V, I OUT = 6A, f SW = 500kHz, V DD = V CC , and T A = +25°C, unless otherwise noted.)
SHORT-CIRCUIT INDUCTOR CURRENT
VOLTAGE MARGINING (9%)
MAX1945 toc18
V CTL1
2V/div
SHORT-CIRCUIT INDUCTOR CURRENT
MAX1945 toc19
V OUT
(EXPANDED TIME)
MAX1945 toc20
V OUT
500mV/div
500mV/div
I LX
10A/div
400 μ s/div
V OUT
200mV/div
100ms/div
I LX
5A/div
V LX
2V/div
10 μ s/div
Pin Description
PIN
1
2
3, 5, 7, 9,
20, 22, 24,
26
4, 6, 8, 10
11
12
13
14
15
16
17
18
NAME
BST
V DD
LX
IN
V CC
GND
REF
COMP
FB
FBSEL
SYNC
SYNCOUT
FUNCTION
Bootstrap Voltage. High-side driver supply input. Connect a 0.1μF capacitor from BST to LX. Connect a
Schottky diode from IN to BST. A 1N4148 diode can be used for 5V input to reduce cost.
Low-Side Driver Supply Voltage
Inductor Connection. Connect an inductor between LX and the regulator output. Connect all LX pins
together close to the device.
Power-Supply Voltage. Input voltage ranges from 2.6V to 5.5V. Bypass with 3 x 22μF ceramic capacitors
in parallel to PGND (see the Input Capacitor Selection section).
Supply-Voltage Input. V CC powers the device. Connect a 10 ? resistor from IN to V CC . Bypass V CC to
GND with 0.1μF.
Analog Ground
Reference. Bypass REF with 0.22μF capacitor to GND. REF tracks the soft-start ramp voltage margining
and is pulled to GND when the output shuts down.
Regulator Compensation. Connect a series RC network from COMP to GND. COMP is pulled to GND
when the output shuts down (see the Compensation Design section).
Feedback Input. When FBSEL = High-Z, use an external resistor divider from the output to set the voltage
from 0.8V to 85% of V IN . Connect FB to the output for regulation to 1.8V when FBSEL = 0, or for
regulation to 2.5V when FBSEL = V CC .
Feedback Select Input. The device regulates to an output of 0.8V when FBSEL is left unconnected. The
device regulates to an output of 1.8V when FBSEL = GND and regulates to an output of 2.5V when
FBSEL = V CC .
Synchronization/Frequency Select. Connect SYNC to GND for 500kHz operation, to V CC for 1MHz
operation, or connect to an external clock at 400kHz to 1.2MHz.
Synchronization Output. SYNCOUT provides a frequency output synchronized 180 degrees out-of-phase
to the operating frequency of the device.
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1945SEUI | 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 |
| MAX1945SEUI+ | 功能描述:直流/直流开关调节器 1MHz 1% 6A Step-Down PWM 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 |
| MAX1945SEUI+T | 功能描述:直流/直流开关调节器 1MHz 1% 6A Step-Down PWM 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 |
| MAX1945SEUI-T | 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 |
| MAX1946ETA | 制造商:Maxim Integrated Products 功能描述:SINGLE USB SWITCH WITH AUTORESET AND FAULT BL - Rail/Tube |
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