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參數(shù)資料
| 型號(hào)： | MAX1793EUE-50 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Low-Dropout, Low IQ, 1A Linear Regulator |
| 中文描述： | FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.35 V DROPOUT, PDSO16 |
| 封裝： | 1.10 MM HEIGHT, TSSOP-16 |
| 文件頁(yè)數(shù)： | 7/10頁(yè) |
| 文件大?。?/td> | 448K |
| 代理商： | MAX1793EUE-50 |
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.
M
Low-Dropout, Low I
Q
, 1A Linear Regulator
_______________________________________________________________________________________
7
Dual Mode is a trademark of Maxim Integrated Products.
1175mV
IN
OUT
100mV
NMOS
4ms
4ms DELAY TIMER
R1
R2
PMOS
OUT
SET
GND
SHDN
IN
RST
SHUTDOWN
LOGIC
1.25V
REFERENCE
MOSFET DRIVER
WITH FOLDBACK
CURRENT LIMIT
ERROR AMP
SHUTDOWN
THERMAL
SENSOR
94% V
OUT
DETECTOR
DUAL MODE
COMPARATOR
MAX1793
Figure 1. Functional Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1793EUE-33 | Low-Dropout, Low IQ, 1A Linear Regulator |
| MAX1795 | Replaced by TMS320VC33 : Digital Signal Processor 132-BQFP |
| MAX1796 | Replaced by TMS320VC33 : Digital Signal Processor 132-BQFP |
| MAX1797 | Replaced by TMS320C6722B : Digital Signal Processor 144-QFP |
| MAX1795EUA | Low Supply Current, Step-Up DC-DC Converters with True-Shutdown |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1793EUE50+ | 功能描述:低壓差穩(wěn)壓器 - LDO Low-IQ 1A RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX1793EUE50+T | 功能描述:低壓差穩(wěn)壓器 - LDO Low-IQ 1A RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX1793EUE50-T | 功能描述:低壓差穩(wěn)壓器 - LDO Low-IQ 1A RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX1795EUA | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Low-Supply Current Step-Up DC/DC Conv RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1795EUA+ | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Low-Supply Current Step-Up DC/DC Conv RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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