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| 型号： | MAX8862LESE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 4.95V/ADJ 16-SOIC |
| 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： | 4.95V，2 V ~ 11 V |
| 输入电压： | 2.5 V ~ 11.5 V |
| 电压 - 压降（标准）： | 0.16V @ 200mA，0.16V @ 100mA |
| 稳压器数量： | 2 |
| 电流 - 输出： | 250mA（最小），100mA（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
Low-Cost, Low-Dropout, Dual Linear Regulator
______________________________________________________________Pin Description
PIN
1
2
3
4, 5, 12, 13
6
7
8, 16
9
10
11
14
15
NAME
IN1
SHDN1
PWROK1
GND
OUT2
SET2
N.C.
IN2
SHDN2
REF2
OUT1
SET1
FUNCTION
Main Regulator Supply Input (2.5V to 11.5V). Bypass with a 1μF, low-ESR capacitor to GND.
Main Regulator Shutdown Input. A logic low turns off the main regulator and power-good comparator.
Power-Good Output. This open-drain output is low when V OUT1 is out of regulation (V OUT1 is 4%
lower than its nominal value).
Ground. Connect to a ground plane to maximize thermal dissipation.
Secondary Regulator Output. Bypass with a 2.2μF low-ESR (< 0.5 ? ) capacitor to GND. To improve
load-transient response and noise performance, use a higher-value, lower-ESR capacitor.
OUT2 Voltage-Set Input. Connect to GND for the factory-preset output voltage. Connect to a resistive
divider from OUT2 to GND for adjustable output voltage.
No connect. There is no internal connection to this pin.
Secondary Regulator Supply Input (2.5V to 11.5V). Bypass with a 1μF, low-ESR capacitor to GND.
Secondary Regulator Shutdown Input. A logic-low input turns off the secondary regulator and the
reference.
Secondary Reference Output. Bypass with a 0.1μF capacitor to GND.
Main Regulator Output. Bypass with a 3.3μF, low-ESR (< 0.5 ? ) capacitor to GND. To improve load-
transient response and noise performance, use a higher-value, lower-ESR capacitor.
OUT1 Voltage Set Input. Connect to GND for the factory-preset output voltage. Connect to a
resistive divider from OUT1 to GND for adjustable output voltage.
_______________Detailed Description
The MAX8862 features Dual Mode? operation, allow-
ing a fixed output of 4.95V (L), 3.175V (T), or 2.85V (R),
or an adjustable output from 2V to 11V. The regulator’s
outputs, OUT1 and OUT2, supply 250mA and 100mA,
respectively.
The block diagram (Figure 1) shows the contents of
each regulator. Note that the main regulator provides a
power-good indicator, and the secondary regulator’s
reference output voltage is available at REF2.
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 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 too high, the
pass transistor’s 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 OUT1/
OUT2, or an external resistor network connected to
SET1/SET2. The Dual Mode comparator examines
V SET1 /V SET2 and selects the feedback path. If this volt-
age is below 40mV, internal feedback is used and the
output voltage is regulated to the factory-preset volt-
age.
Internal P-Channel Pass Transistor
The MAX8862 ’s P-channel pass transistor provides
several advantages over similar designs using PNP
pass transistors, including longer battery life.
The P-channel MOSFET requires no continuous base
current, thereby reducing quiescent current consider-
ably. PNP regulators normally waste a considerable
amount of current in dropout when the pass transistor
saturates; they also use high base-drive currents under
large loads. The MAX8862 does not suffer from these
problems: it consumes only 200μA of quiescent current
for both regulators under light and heavy loads, as well
as in dropout.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8862RCSE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8862RESE | 功能描述:低压差稳压器 - LDO 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 |
| MAX8862RESE+ | 功能描述:低压差稳压器 - LDO Dual 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 |
| MAX8862RESE+T | 功能描述:低压差稳压器 - LDO Dual 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 |
| MAX8862RESE-T | 功能描述:低压差稳压器 - LDO 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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