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| 型号： | MAX1793EUE18 |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/11页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V/ADJ 1A 16-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 96 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 1.8V，1.25 V ~ 5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1A（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 管件 |
| 其它名称： | Q1171259 |
Low-Dropout, Low I Q , 1A Linear Regulator
Detailed Description
The MAX1793 features Dual Mode? operation, allow-
ing a fixed output or an adjustable output from +1.25V
to +5V. The regulators are guaranteed to supply 1A of
output current.
As Figure 1 shows, the device consists of a +1.25V ref-
erence, error amplifier, MOSFET driver, p-channel pass
transistor, internal feedback voltage-divider, Dual Mode
comparator, and 4ms reset output.
The +1.25V reference is connected to the inverting
input of the error amplifier. The error amplifier com-
pares this reference with the selected feedback voltage
and amplifies the difference. The MOSFET driver reads
the error signal and applies the appropriate drive to the
p-channel transistor. If the feedback voltage is lower
than the reference, the pass transistor’s gate is pulled
lower, allowing more current to pass and increase the
output voltage. If the feedback voltage is high, the pass
transistor’s gate is pulled up, allowing less current to
pass to the output. The low V OUT comparator senses
when the feedback voltage has dropped 6% below its
expected level, causing RST to go low.
The output voltage is fed back through either an inter-
nal resistor-divider connected to OUT or an external
resistor network connected to SET. The Dual Mode
comparator examines V SET and selects the feedback
path. If V SET is below 50mV, the internal feedback path
is used and the output is regulated to the factory-preset
voltage.
Dual Mode is a trademark of Maxim Integrated Products, Inc.
IN
SHUTDOWN
THERMAL
SENSOR
SHDN
SHUTDOWN
LOGIC
ERROR AMP
MOSFET DRIVER
WITH FOLDBACK
CURRENT LIMIT
PMOS
OUT
94% V OUT
DETECTOR
IN
4ms DELAY TIMER
NMOS
RST
1.25V
REFERENCE
1175mV
4ms
OUT
SET
R1
MAX1793
DUAL MODE
COMPARATOR
100mV
R2
GND
Figure 1. Functional Diagram
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1793EUE18+ | 功能描述:低压差稳压器 - LDO Low-IQ 1A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1793EUE18+T | 功能描述:低压差稳压器 - LDO Low-IQ 1A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1793EUE18-T | 功能描述:低压差稳压器 - LDO Low-IQ 1A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1793EUE20 | 功能描述:低压差稳压器 - LDO Low-IQ 1A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1793EUE20+ | 功能描述:低压差稳压器 - LDO Low-IQ 1A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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