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| 型号： | MAX1792EUA18+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V/ADJ .5A 8-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 1.8V，1.25 V ~ 5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 8-uMax-EP |
| 包装： | 管件 |
| 产品目录页面： | 1410 (CN2011-ZH PDF) |
500mA Low-Dropout
Linear Regulator in μMAX
0.7
0.6
POWER- μ MAX PACKAGE OPERATING
REGION AT T J(MAX) = +150 ° C
0.1 Ω or less to ensure stability and optimum transient
response. Surface-mount ceramic capacitors have very
low ESR and are commonly available in values up to
10μF. Connect C IN and C OUT as close to the MAX1792
0.5
CONTINUOUS CURRENT LIMIT
T A = +50 ° C
as possible to minimize the impact of PC board trace
inductance.
Noise, PSRR, and Transient Response
0.4
T A = +85 ° C
The MAX1792 is designed to operate with low dropout
voltages and low quiescent currents in battery-powered
0.3
0.2
0.1
T A = +70 ° C
MAXIMUM SUPPLY
VOLTAGE LIMIT
(V OUT = 1.25V)
systems while still maintaining good noise, transient
response, and AC rejection. See the Typical Operating
Characteristics for a plot of Power-Supply Rejection
Ratio (PSRR) vs. Frequency. When operating from
noisy sources, improved supply-noise rejection and
transient response can be achieved by increasing the
values of the input and output bypass capacitors and
through passive filtering techniques.
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
The MAX1792 load-transient response graphs (see
INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V)
Figure 3. Power Operating Regions: Maximum Output Current
vs. Supply Voltage
duction path from the die to the PC board. Additionally,
the MAX1792’s ground pin (GND) performs the dual
function of providing an electrical connection to system
ground and channeling heat away. Connect the
exposed backside pad and GND to the system ground
using a large pad or ground plane, or multiple vias to
the ground plane layer.
The MAX1792 delivers up to 0.5A (RMS) and operates
with input voltages up to 5.5V, but not simultaneously.
High output currents can only be sustained when input-
output differential voltages are low, as shown in Figure 3.
Applications Information
Capacitor Selection
and Regulator Stability
Capacitors are required at the MAX1792’s input and
output for stable operation over the full temperature
range and with load currents up to 500mA. Connect a
1μF capacitor between IN and ground and a 3.3μF low
equivalent series resistance (ESR) capacitor between
OUT and ground. For output voltages less than 2V, use
a 4.7μF low-ESR output capacitor. The input capacitor
(C IN ) lowers the source impedance of the input supply.
Reduce noise and improve load-transient response,
stability, and power-supply rejection by using larger
Typical Operating Characteristics) show two compo-
nents of the output response: a DC shift from the output
impedance due to the load current change, and the
transient response. A typical transient response for a
step change in the load current from 5mA to 500mA is
18mV. Increasing the output capacitor ’s value and
decreasing the ESR attenuates the overshoot.
Input-Output (Dropout) Voltage
A regulator’s minimum input-to-output voltage differen-
tial (dropout voltage) determines the lowest usable sup-
ply voltage. In battery-powered systems, this
determines the useful end-of-life battery voltage.
Because the MAX1792 uses a P-channel MOSFET pass
transistor, its dropout voltage is a function of drain-to-
source on-resistance (R DS(ON) ) multiplied by the load
current (see Typical Operating Characteristics):
V DROPOUT = V IN - V OUT = R DS(ON) x I OUT
The MAX1792 ground current remains below 150μA in
dropout.
Note: The MAX1792 has an exposed thermal pad on
the bottom side of the package.
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages . Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
output capacitors such as 10μF.
The output capacitor’s (C OUT ) ESR affects stability and
output noise. Use output capacitors with an ESR of
PACKAGE
TYPE
μMAX-EP
PACKAGE
CODE
U8E+2
OUTLINE
NO.
LAND
PATTERN NO.
_______________________________________________________________________________________
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1792EUA18/V+ | 制造商:Maxim Integrated Products 功能描述:500MA, LOW-DROPOUT LINEAR REGULATOR IN UMAX - Rail/Tube |
| MAX1792EUA18/V+T | 制造商:Maxim Integrated Products 功能描述:500MA, LOW-DROPOUT LINEAR REGULATOR IN UMAX - Tape and Reel |
| MAX1792EUA18+ | 功能描述:低压差稳压器 - LDO 500mA 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 |
| MAX1792EUA18+ | 制造商:Maxim Integrated Products 功能描述:IC LDO REG 1.8V 500MA. 8UMAX |
| MAX1792EUA18+T | 功能描述:低压差稳压器 - LDO 500mA 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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