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| 型号： | LM3686TLE-AADW/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 1/27页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC .9A TRPL 12USMD |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 3 |
| 输出电压： | 1.2V，1.8V，2.8V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 电流/电压模式 |
| 频率 - 开关： | 3MHz |
| 电流 - 输出： | 900mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFBGA |
| 包装： | 标准包装 |
| 供应商设备封装： | 12-uSMD |
| 产品目录页面： | 1288 (CN2011-ZH PDF) |
| 其它名称： | LM3686TLE-AADW/NOPBDKR LM3686TLE-AADWDKR LM3686TLE-AADWDKR-ND |
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SNVS520E – AUGUST 2008 – REVISED MAY 2013
LM3686 Step-Down DC-DC Converter with Integrated Post Linear Regulators System and
Low-Noise Linear Regulator
Check for Samples: LM3686
1
FEATURES
APPLICATIONS
2
DC-DC REGULATOR
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Moblie TV
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V OUT_DCDC = 1.2V to 2.5V (in 100 mV Steps -
Factory Programmed)
600 mA Maximum Load Capability (LILO =
OFF)
3 MHz PWM Fixed Switching Frequency (Typ.)
Automatic PFM/PWM Mode Switching
Internal Synchronous Rectification for High
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Hand-Held Radios
Personal Digital Assistants
Palm-top PCs
Portable Instruments
Battery-Powered Devices
Portable Personal Clients
Efficiency
DESCRIPTION
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Internal Soft Start
DUAL RAIL LINEAR REGULATOR: LILO
Load Transients < 50 mV Peak Typ.
Line Transients < 1 mV Peak Typ.
V OUT_LILO = 0.7V to 2.0V (in 50 mV Steps -
Factory Programmed)
70 μA Typical I Q From V IN_LILO
350 mA Maximum Load Capability (Large FET)
LINEAR REGULATOR: LDO
Load Transients < 80 mV Peak Typ.
Line Transients < 1 mV Peak Typ.
V OUT_LDO = 1.5V to 3.3V (in 100 mV Steps -
Factory Programmed)
50 μA Typical I Q
300 mA Maximum Load Capability
COMBINED GLOBAL FEATURES
V BATT ≥ V OUT_LILO + 1.5V or 2.7V, Whichever is
Higher
900 mA Maximum Combined Load Capability
Operates From a Single Li-Ion Cell or 3 Cell
The LM3686 is a step-down DC-DC converter with
one integrated very low dropout linear regulator and a
low noise linear regulator optimized for powering
ultra-low voltage circuits from a single Li-Ion cell or 3
cell NiMH/NiCd batteries. It provides three outputs
with combined load current up to 900 mA over an
input voltage range from 2.7V to 5.5V.
The device offers superior features and performance
for many applications. Automatic intelligent switching
between PWM low-noise and PFM low-current mode
offers improved system control. During full-power
operation, a fixed-frequency 3 MHz (typ.), PWM
mode drives loads from ~70 mA to 600 mA max.
Hysteretic PFM mode extends the battery life through
reduction of the quiescent current to 28 μ A (typ.) at
light load and system standby. Internal synchronous
rectification provides high efficiency.
Three enable pins allow the separate operation of
either the DC-DC, post-regulation linear regulator or
the linear regulator alone. If the DC-DC is not
enabled during startup of the post-regulation linear
regulator, a parallel small pass transistor supplies the
linear regulator from V BATT with maximal 50 mA. In
the combined operation where both enables are
NiMH/NiCd Batteries
raised
together,
the
small
pass
transistor
is
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Only Six Tiny Surface-mount External
Components Required (One Inductor, Five
Ceramic Capacitors)
12–bump DSBGA
100 μA Iq From V BATT
15.66 mm 2 Total Solution Size
deactivated and the big pass transistor provides 350
mA output current. In shutdown mode (Enable pins
pulled low), the device turns off and reduces battery
consumption to 2.5 μ A (typ.).
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright ? 2008–2013, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3686TLE-AAED | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Step-Down DC-DC Converter with Integrated Post Linear Regulators System and Low-Noise Linear Regulator |
| LM3686TLE-AAED/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM3686TLE-AAEF | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Step-Down DC-DC Converter with Integrated Post Linear Regulators System and Low-Noise Linear Regulator |
| LM3686TLE-AAEF/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM3686TLX-AADW | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Step-Down DC-DC Converter with Integrated Post Linear Regulators System and Low-Noise Linear Regulator |
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