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参数资料
| 型号： | MAX8874SEUK+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.84V/ADJ SOT23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 2.84V，1.25 V ~ 6.5 V |
| 输入电压： | 2.5 V ~ 6.5 V |
| 电压 - 压降（标准）： | 0.055V @ 50mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 120mA（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
MAX8873T/S/R, MAX8874T/S/R
Low-Dropout, 120mA Linear Regulators
______________________________________________________________Pin Description
PIN
1
2
3
4
5
NAME
IN
GND
SHDN
SET
OUT
FUNCTION
Regulator Input. Supply voltage can range from 2.5V to 6.5V. Bypass with 1μF to GND (see Capacitor
Selection and Regulator Stability).
Ground. This pin also functions as a heatsink. Solder to large pads or the circuit board ground plane to max-
imize thermal dissipation.
Active-Low Shutdown Input. A logic low reduces the supply current to 0.1nA. On the MAX8874, a logic low
also causes the output voltage to discharge to GND. Connect to IN for normal operation.
Feedback Input for Setting the Output Voltage. Connect to GND to set the output voltage to the preset 2.80V
(MAX887_R), 2.84V (MAX887_S), or 3.15V (MAX887_T). Connect to an external resistor divider for
adjustable-output operation. DO NOT LEAVE THIS PIN UNCONNECTED .
Regulator Output. Fixed or adjustable from 1.25V to 6.5V. Sources up to 120mA. Bypass with a 1μF, <0.2 Ω
typical ESR capacitor to GND.
_______________Detailed Description
The MAX8873/MAX8874 are low-dropout, low-quiescent-
current linear regulators designed primarily for battery-
powered applications. They supply an adjustable 1.25V to
6.5V output or a preselected 2.80V (MAX887_R), 2.84V
(MAX887_S), or 3.15V (MAX887_T) output for load currents
up to 120mA. These devices consist of a 1.25V reference,
error amplifier, MOSFET driver, P-channel pass transistor,
dual-mode comparator, and internal feedback voltage
divider (Figure 1).
The 1.25V bandgap reference is connected to the error
amplifier’s inverting input. The error amplifier compares 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 pass
transistor. If the feedback voltage is lower than the refer-
ence, the pass-transistor gate is pulled lower, allowing more
current to pass and increasing the output voltage. If the
feedback voltage is too high, the pass-transistor gate is
pulled up, allowing less current to pass to the output.
The output voltage is fed back through either an internal
resistor voltage divider connected to the OUT pin, or an
external resistor network connected to the SET pin. The
dual-mode comparator examines the SET voltage and
selects the feedback path. If SET is below 60mV, internal
feedback is used and the output voltage is regulated to the
preset output voltage. Additional blocks include a current
limiter, reverse battery protection, thermal sensor, and shut-
down logic.
IN
SHDN
REVERSE
BATTERY
PROTECTION
SHUTDOWN
ERROR
AMP
MOS DRIVER
WITH I LIMIT
P
OUT
MAX8873
MAX8874
GND
* AUTO-DISCHARGE, MAX8874 ONLY
Figure 1. Functional Diagram
6
LOGIC
THERMAL
SENSOR
1.25V
REF
DUAL-MODE
COMPARATOR
60mV
*
N
SET
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8874TEUK | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX8874TEUK+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX8874TEUK+T | 功能描述:低压差稳压器 - LDO 120mA Linear Regulator 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 |
| MAX8874TEUK-T | 功能描述:低压差稳压器 - LDO 120mA Linear Regulator 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 |
| MAX8875EUK15 | 制造商:Maxim Integrated Products 功能描述: |
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