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参数资料
| 型号： | MAX1589EZT300-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | Low-Input-Voltage, 500mA LDO Regulator with RESETin SOT and TDFN |
| 中文描述： | 3 V FIXED POSITIVE LDO REGULATOR, 0.35 V DROPOUT, PDSO6 |
| 封装： | SC-74, MO-193, SOT-23, 6 PIN |
| 文件页数： | 7/12页 |
| 文件大小： | 312K |
| 代理商： | MAX1589EZT300-T |
transistor, allowing the IC to cool. The thermal sensor
turns the pass transistor on again after the junction tem-
perature cools by 15°C, resulting in a pulsed output
during continuous thermal-overload conditions.
Thermal-overload protection safeguards the MAX1589
in the event of fault conditions. For continuous opera-
tion, do not exceed the absolute maximum junction-
temperature rating of +150°C.
Operating Region and Power Dissipation
The MAX1589’s maximum power dissipation depends
on the thermal resistance of the IC package and circuit
board, the temperature difference between the die
junction and ambient air, and the rate of airflow. The
power dissipated in the device is P = I
OUT
(V
IN
-
V
OUT
). The maximum allowed power dissipation is:
P
MAX
= (T
J(MAX)
- T
A
) / (
θ
JC
+
θ
CA
)
where T
J(MAX)
- T
A
is the temperature difference between
the MAX1589 die junction and the surrounding air,
θ
JC
is
the thermal resistance of the junction to the case, and
θ
CA
is the thermal resistance from the case through the
PC board, copper traces, and other materials to the sur-
rounding air. Typical thermal resistance (
θ
JC
+
θ
JA
) for a
device mounted to a 1in square, 1oz copper pad is
41°C/W for the 3mm x 3mm TDFN package, and
110°C/W for the 6-pin thin SOT23 package. For best
heatsinking, expand the copper connected to GND, or
the exposed paddle.
The MAX1589 delivers up to 500mA and operates with
an input voltage up to +3.6V. However, when using the
6-pin SOT23 version, high output currents can only be
sustained when the input-output differential voltage is
low, as shown in Figure 2.
The maximum allowed power dissipation for the 6-pin
TDFN is 1.951W at T
A
= +70°C. Figure 3 shows that the
maximum input-output differential voltage is not limited
by the TDFN package power rating.
Applications Information
Capacitor Selection and
Regulator Stability
Capacitors are required at the MAX1589’s input and
output for stable operation over the full temperature
range and with load currents up to 500mA. Connect a
1μF ceramic capacitor between IN and GND and a
4.7μF low-ESR ceramic capacitor between OUT and
GND. The input capacitor (C
IN
) lowers the source
impedance of the input supply. Use larger output
M
Low-Input-Voltage, 500mA LDO Regulator
with
RESET
in SOT and TDFN
_______________________________________________________________________________________
7
Figure 1. Functional Diagram
P
OUT
RESET
MAX1589
MOS DRIVER
WITH I
LIMIT
ERROR
AMP
POWER-GOOD
COMPARATOR
THERMAL
SENSOR
100ms
TIMER
82.5%
REF
REF
SHUTDOWN
LOGIC
IN
SHDN
GND
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相关代理商/技术参数 |
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|---|---|
| MAX1589EZT-T | 制造商:Maxim Integrated Products 功能描述:500MA LOW VOLTAGE LINEAR REGULATOR IN TINY QF - Tape and Reel |
| MAX158ACAI | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX158ACAI+ | 功能描述:模数转换器 - ADC 8-Bit 4Ch 400ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX158ACAI+T | 功能描述:模数转换器 - ADC 8-Bit 4Ch 400ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX158ACAI-T | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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