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| 型号： | MAX604ESA |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V/ADJ .5A 8SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 3.3V，1.25 V ~ 11 V |
| 输入电压： | 2.9 V ~ 11.5 V |
| 电压 - 压降（标准）： | 0.48V @ 400mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
| 其它名称： | Q1004497 |
MAX603/MAX604
5V/3.3V or Adjustable, Low-Dropout,
Low I Q , 500mA Linear Regulators
IN
SHUTDOWN
OFF
SHUTDOWN
LOGIC
ERROR AMP
MOSFET DRIVER
WITH FOLDBACK
CURRENT LIMIT
P
REVERSE
CURRENT
PROTECTION
OUT
SET
R1
GND
THERMAL
SENSOR
1.20V
REFERENCE
DUAL-MODE
COMPARATOR
80mV
R2
MAX603
MAX604
Figure 2. Functional Diagram
_______________Detailed Description
The MAX603/MAX604 are low-dropout, low-quiescent-
current linear regulators designed primarily for battery-
powered applications. They supply an adjustable 1.25V
to 11V output or a preselected 5V (MAX603) or 3.3V
(MAX604) output for load currents up to 500mA. As
illustrated in Figure 2, they consist of a 1.20V reference,
error amplifier, MOSFET driver, P-channel pass transis-
tor, dual-mode comparator, and internal feedback volt-
age divider.
The 1.20V 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 reference, 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.
6
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 used. If SET is below 80mV,
internal feedback is used and the output voltage is regulat-
ed to 5V for the MAX603 or 3.3V for the MAX604.
Additional blocks include a foldback current limiter, reverse
current protection, thermal sensor, and shutdown logic.
Internal P-Channel Pass Transistor
The MAX603/MAX604 feature a 500mA P-channel
MOSFET pass transistor. This provides several advan-
tages over similar designs using PNP pass transistors,
including longer battery life.
The P-channel MOSFET requires no base drive, which
reduces quiescent current considerably. PNP based
regulators waste considerable amounts of current in
dropout when the pass transistor saturates. They also
use high base-drive currents under large loads. The
MAX603/MAX604 do not suffer from these problems
and consume only 15μA of quiescent current under
light and heavy loads, as well as in dropout.
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX604ESA/GG8 | 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 |
| MAX604ESA/GH9 | 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 |
| MAX604ESA/GH9-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 |
| MAX604ESA+ | 功能描述:低压差稳压器 - LDO 3.3/5/AdjV 500mA 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 |
| MAX604ESA+T | 功能描述:低压差稳压器 - LDO 3.3/5/AdjV 500mA 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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