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参数资料
| 型号： | MAX8518EUB+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1A 10-UMAX |
| 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 @ 1A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1A |
| 电流 - 限制（最小）： | 1.6A |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 10-µMAX-EP |
| 包装： | 带卷 (TR) |
1.425V to 3.6V Input, 1A,
0.2V Dropout LDO Regulators
Detailed Description
The MAX8516/MAX8517/MAX8518 are low-input, low-
dropout, PMOS regulators capable of delivering up to
1A of output current with as little as 200mV of headroom
from input to output. The PMOS output stage can be dri-
ven from input voltages down to +1.425V without sacri-
Output Voltage Selection
The MAX8516/MAX8517/MAX8518 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
R 2 ?
ficing stability or transient performance. Since these
regulators have a PMOS output device, supply current
is not a significant function of load or input headroom.
?
?
R 1 ?
?
Internal p-Channel Pass Transistor
The MAX8516/MAX8517/MAX8518 feature a 100m ? (typ)
p-channel MOSFET pass transistor. Unlike similar
designs using pnp pass transistors, p-channel MOSFETs
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:
R 1 = R 2 ? OUT
1 ?
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
? V
? V FB
?
?
?
I INRUSH = I LOAD + ? OUT
?
?
?
base-drive currents under large loads. The MAX8516/
MAX8517/MAX8518 do not suffer from these problems
and consume only 340μA (typ) of quiescent current
under heavy loads, as well as in dropout.
Short-Circuit/Thermal Fault Protection
The MAX8516/MAX8517/MAX8518 are fully protected
from a short circuit at the output through current-limiting
and thermal-overload circuitry. In the fault condition
when the output is shorted to ground, the output current
is limited to 2A. Under these conditions, the part quickly
heats up. When the junction temperature reaches
+165°C, the thermal-overload circuitry turns off the
output, allowing the part to cool down. When the junction
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 maxi-
mum junction-temperature rating of T J = +150°C.
ADJUSTABLE
Soft-Start
Inherent soft-start limits inrush current. Peak inrush cur-
rent is dependent on the value of C OUT and can be cal-
culated as follows:
? C ( μ F) ?
66
Shutdown Mode
The MAX8516/MAX8517/MAX8518 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 (MAX8517 Only)
The MAX8517 features a power-OK (POK) 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 or rises out-
side this range, POK transitions low. This open-drain
+1.425V TO +3.6V
1 μ F
IN
IN
MAX8516
MAX8517
OUT
OUT
OUTPUT
output requires an external pullup resistor to IN. An
internal delay circuit prevents POK from switching for
50μs (typ) after the trip threshold is initially reached. If
the part is in shutdown mode, POK is low.
100k ? *
ENABLE
MAX8518
POK (MAX8517) OR
POR (MAX8518)
EN
FB
GND
R1
R2
4.7 μ F
Power-On Reset (MAX8518 Only)
The MAX8518 features a power-on reset (POR) output
that transitions high 140ms (typ) after the output has
risen above 90% of its final value. This open-drain out-
put requires an external pullup resistor to IN. If the part
is in shutdown mode, falls below 90% of the nominal
SHUTDOWN
*FOR MAX8517 AND MAX8518
Figure 1. Typical Application Circuit
output voltage, or experiences a short-circuit or thermal
fault, POR immediately transitions low.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
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| MAX8519EEE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8519EEE+ | 功能描述:低压差稳压器 - LDO 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 |
| MAX8519EEE+T | 功能描述:低压差稳压器 - LDO 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 |
| MAX851CSA | 功能描述:电荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX851CSA-T | 功能描述:电荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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