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| 型号： | LP3985IM5X-2.9/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 2.9 V FIXED POSITIVE LDO REGULATOR, 0.1 V DROPOUT, PDSO5 |
| 封装： | SOT-23, SOP-5 |
| 文件页数： | 1/17页 |
| 文件大小： | 993K |
| 代理商： | LP3985IM5X-2.9/NOPB |
LP3985
Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS
Voltage Regulator
General Description
The LP3985 is designed for portable and wireless applica-
tions with demanding performance and space requirements.
The LP3985 is stable with a small 1F ±30% ceramic or
high-quality tantalum output capacitor. The micro SMD re-
quires the smallest possible PC board area - the total appli-
cation circuit area can be less than 2.0mm x 2.5mm, a
fraction of a 1206 case size.
The LP3985’s performance is optimized for battery powered
systems to deliver ultra low noise, extremely low dropout
voltage and low quiescent current. Regulator ground current
increases only slightly in dropout, further prolonging the
battery life.
An optional external bypass capacitor reduces the output
noise without slowing down the load transient response.
Fast start-up time is achieved by utilizing an internal
power-on circuit that actively pre-charges the bypass capaci-
tor.
Power supply rejection is better than 50 dB at low frequen-
cies and starts to roll off at 1kHz. High power supply rejection
is maintained down to low input voltage levels common to
battery operated circuits.
The device is ideal for mobile phone and similar battery
powered wireless applications. It provides up to 150 mA,
from a 2.5V to 6V input. The LP3985 consumes less than
1.5A in disable mode and has fast turn-on time less than
200s.
The LP3985 is available in a 5 bump small bump micro SMD,
a 5 bump large bump micro SMD, a 5 bump thin micro SMD
and a 5 pin SOT-23 package. Performance is specified for
40C to +125C temperature range and is available in 2.5V,
2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V. 3.1V, 3.2V, 3.3V, 4.7V,
4.75V, 4.8V and 5.0V output voltages. For other output volt-
age options between 2.5V to 5.0V or for a dual LP3985,
please contact National Semiconductor sales office.
Key Specifications
n
2.5 to 6.0V input range
n
150mA guaranteed output
n
50dB PSRR at 1kHz @ V
IN =VOUT + 0.2V
n
≤1.5A quiescent current when shut down
n
Fast Turn-On time: 200 s (typ.)
n
100mV maximum dropout with 150mA load
n
30Vrms output noise (typ) over 10Hz to 100kHz
n
40 to +125C junction temperature range for operation
n
2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.1V, 3.2V,
3.3V, 4.7V, 4.75V, 4.8V and 5.0V outputs standard
Features
n
Miniature 5-I/O micro SMD and SOT-23-5 package
n
Logic controlled enable
n
Stable with ceramic and high quality tantalum capacitors
n
Fast turn-on
n
Thermal shutdown and short-circuit current limit
Applications
n
CDMA cellular handsets
n
Wideband CDMA cellular handsets
n
GSM cellular handsets
n
Portable information appliances
Typical Application Circuit
10136402
Note: Pin Numbers in parenthesis indicate micro SMD package.
* Optional Noise Reduction Capacitor.
August 2005
LP3985
Micropower
,
150mA
Low-Noise
Ultra
Low-Dropout
CMOS
V
oltage
Regulator
2005 National Semiconductor Corporation
DS101364
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LP3985IM5X-3.0 | 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 |
| LP3985IM5X-3.0/NOPB | 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 |
| LP3985IM5X-3.1 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator |
| LP3985IM5X-3.2 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator |
| LP3985IM5X-3.2/NOPB | 功能描述:IC REG LDO 3.2V .15A SOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.1V 输入电压:最高 5.5V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA 电流 - 限制（最小）:420mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:带卷 (TR) |
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