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参数资料
| 型号： | MAX1598EZK45-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 4.5 V FIXED POSITIVE LDO REGULATOR, 0.12 V DROPOUT, PDSO5 |
| 封装： | THIN, SOT-23, 5 PIN |
| 文件页数： | 6/9页 |
| 文件大小： | 363K |
| 代理商： | MAX1598EZK45-T |
MAX1598
Detailed Description
The MAX1598 is a low-noise, low-dropout, low-quies-
cent-current linear regulator designed primarily for bat-
tery-powered applications. The part is available with
preset output voltages from 2.5V to 5V in 100mV incre-
ments. This device can supply loads up to 200mA. As
illustrated in Figure 1, the MAX1598 consists of a 1.25V
reference, error amplifier, P-channel pass transistor,
and internal feedback voltage-divider.
The 1.25V bandgap reference is connected to the error
amplifier’s inverting input. The error amplifier compares
this reference with the feedback voltage and amplifies
the difference. If the feedback voltage is lower than the
reference voltage, the pass-transistor gate is pulled
lower, which allows more current to pass to the output
and increases the output voltage. If the feedback volt-
age 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 an internal resistor voltage-
divider connected to the OUT pin.
An external bypass capacitor connected to the BP pin
reduces noise at the output. Additional blocks include a
current limiter, reverse battery protection, thermal sen-
sor, and shutdown logic. The MAX1598 also includes
an autodischarge function, which actively discharges
the output voltage to ground when the device is placed
in shutdown mode.
Low-Noise, Low-Dropout, 200mA
Linear Regulator
6
_______________________________________________________________________________________
SHUTDOWN
AND
POWER-ON
CONTROL
ERROR
AMP
1.25V
REF
P
N
OUT
BP
GND
IN
SHDN
MAX1598
MOS DRIVER
WITH ILIMIT
THERMAL
SENSOR
REVERSE
BATTERY
PROTECTION
Figure 1. Functional Diagram
______________________________________________________________Pin Description
PIN
NAME
FUNCTION
1IN
Regulator Input. Supply voltage can range from 2.5V to 6.5V. Bypass with a 1F capacitor to GND
(see the Capacitor Selection and Regulator Stability section).
2
GND
Ground. This pin also functions as a heatsink. Solder to a large pad or the circuit-board ground
plane to maximize power dissipation.
3
SHDN
Active-Low Shutdown Input. A logic low reduces the supply current to 10nA and causes the output
voltage to discharge to GND. Connect to IN for normal operation.
4BP
Reference-Noise Bypass. Bypass with a low-leakage, 0.01F ceramic capacitor for reduced noise at
the output.
5
OUT
Regulator Output. Sources up to 200mA. Bypass with a 2.2F (<0.2
typical ESR) capacitor to GND.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1598EZK4A | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1598EZK4A-T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1598EZK50 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1598EZK50+T | 功能描述:低压差稳压器 - LDO Integrated Circuits (ICs) 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 |
| MAX1598EZK50-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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