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参数资料
| 型号： | MAX8528EUD+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 2A 14-TSSOP |
| 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，可调式 |
| 输出电压： | 0.5 V ~ 3.4 V |
| 输入电压： | 1.43 V ~ 3.6 V |
| 电压 - 压降（标准）： | 0.1V @ 2A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 2A |
| 电流 - 限制（最小）： | 3.2A |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-TSSOP （0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 14-TSSOP-EP |
| 包装： | 带卷 (TR) |
1.425V to 3.6V Input, 2A,
0.2V Dropout LDO Regulators
Detailed Description
The MAX8526/MAX8527/MAX8528 are low-input, low-
dropout, PMOS regulators capable of delivering up to
2A of output current with as little as 200mV of head-
room from input to output. The PMOS output stage can
be driven from input voltages down to +1.425V without
Output Voltage Selection
The MAX8526/MAX8527/MAX8528 feature an
adjustable output voltage from 0.5V to 3.4V, using two
external resistors connected as a voltage-divider to FB
as shown in Figure 1. The output voltage is set by the
following equation:
V OUT FB ? 1 +
= V
?
sacrificing stability or transient performance. Since this
regulator has a PMOS output device, supply current is
not a significant function of load or input headroom.
?
?
R 1 ?
R 2 ?
R 1 = R 2 ? OUT -1 ?
? C OUT ( μ F ) ?
I INRUSH = I LOAD + ? ?
? ?
Internal p-Channel Pass Transistor
The MAX8526/MAX8527/MAX8528 feature a 50m ?
(typ) p-channel MOSFET pass transistor. Unlike similar
designs using pnp pass transistors, p-channel MOSFETs
require no base drive, which reduces quiescent current.
pnp-based regulators also waste considerable current in
dropout when the pass transistor saturates, and use high
base-drive currents under large loads. The MAX8526/
MAX8527/MAX8528 do not suffer from these problems
and consume only 500μA (typ) of quiescent current
under heavy loads, as well as in dropout.
Short-Circuit/Thermal Fault Protection
The MAX8526/MAX8527/MAX8528 are fully protected
from a short circuit at the output through current-limit-
ing and thermal-overload circuitry. In the fault condition
when the output is shorted to ground, the output cur-
rent is limited to 4A. Under these conditions, the part
quickly heats up. When the junction temperature reach-
es +165°C, the thermal-overload circuitry turns off the
output, allowing the part to cool down. When the junc-
tion temperature cools to +150°C, the output turns
back on and tries to reestablish regulation. Current
limiting and thermal protection continue until the fault is
removed. For continuous operation, do not exceed the
absolute maximum junction temperature rating of
T J = +150°C.
where typically V FB = 0.5V. Choose R2 < 5k ? to opti-
mize quiescent current, accuracy, and high-frequency
power-supply rejection. To simplify resistor selection:
? V ?
? V FB ?
Soft-Start
Inherent soft-start limits inrush current. Peak inrush cur-
rent is dependent on the value of C OUT and can be
calculated as follows:
66
Shutdown Mode
The MAX8526/MAX8527/MAX8528 include an enable
input. To shut down the device, pull EN to GND. For
normal operation, connect the EN to IN. During shut-
down, an internal 10k ? resistor pulls down the output.
Power-OK (POK, MAX8527 Only)
The MAX8527 features a power-OK output to indicate
the status of the output. POK remains high when the
regulator output is within ±10% of its nominal output
voltage. If the output voltage falls/rises outside this
range, POK transitions low. This open-drain output
+1.425V TO +3.6V
2.2 μ F
IN
IN
OUT
OUT
ADJUSTABLE
OUTPUT
requires an external pullup resistor to IN. An internal
delay circuit prevents the POK from switching for 50μs
(typ) after the trip threshold is initially reached. If the
part is in shutdown mode, POK is low.
MAX8526
MAX8528
100k ? *
ENABLE
IN
MAX8527
IN
POK (MAX8527) OR
POR (MAX8528)
EN
OUT
OUT
FB
GND
R1
R2
10 μ F
Power-On Reset (POR, MAX8528 Only)
The MAX8528 features a power-on reset output that
transitions high 150ms (typ) after the output has risen
above 90% of its final value. This open-drain output
requires an external pullup resistor to IN. If the part is in
shutdown mode, falls below 90% of the nominal output
voltage, or experiences a short-circuit/thermal fault,
SHUTDOWN
*FOR MAX8527 AND MAX8528
Figure 1. Typical Application Circuit
POR immediately transitions low.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8529EEG | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8529EEG+ | 功能描述:DC/DC 开关控制器 1.5MHz Dual 180 Out-of-Phase RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8529EEG+T | 功能描述:DC/DC 开关控制器 1.5MHz Dual 180 Out-of-Phase RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8529EEG-T | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8529EVKIT | 制造商:Maxim Integrated Products 功能描述:1.5MHZ DUAL 180 DEGREES OUT-OF-PHAS - Rail/Tube |
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