参数资料
型号: LM3686TLE-AAED/NOPB
厂商: National Semiconductor
文件页数: 4/27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:
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-AAED/NOPBDKR
LM3686TLE-AAEDDKR
LM3686TLE-AAEDDKR-ND
SNVS520E – AUGUST 2008 – REVISED MAY 2013
Enable Combinations
EN_DCDC
0
0
EN_LILO
0
0
EN_LDO
0
1
Function
No Outputs
Linear Regulator enabled only (EN_LDO), supply from V IN_LDO , I OUT_MAX = 300
mA
0
1
0
Linear Regulator enabled only LILO supplies from V IN_LDO ,
I OUT_MAX = 50 mA, V IN_LDO > = V OUT_LILO
1
1
0
1
0
0
DC-DC converter enabled only
Linear Regulator & DCDC enabled
1) V IN_LILO < V OUT_LILO + 150 mV (typ.), the small NMOS device is active (I MAX
= 50 mA) and supplied by V IN_LDO .
2) If V IN_LILO > V OUT_LILO + 250 mV (typ.), the large NMOS device is active (I MAX
= 350 mA) and supplied by V IN_LILO . Maxium current of DC-DC when EN_LILO =
High is 250 mA (1) (2)
1
1
1
DC-DC converter and linear regulator active.
Linear regulator starts after DC-DC converter.
(1)
(2)
The LILO is turned on via a small NMOS device supplied by V IN_LDO . The maximum current is 50 mA when this small NMOS is ON. If
higher current > 50 mA is desired the following condition must be done: EN_DC = HIGH .
When the switcher is enabled, a transition occurs from the small NMOS to a larger NMOS. The transition occurs when V IN_LILO >
V OUT_LILO + 250 mV. If V IN_LILO < V OUT_LILO + 150 mV, the LILO switches back to small NMOS (Switcher EN = low).
1.8V
V OUT -DCDC
V OUT -LILO
0V
0V
1.2V
LARGE NMOS
I OUT -LILO > 50 mA
FET OF LILO (SMALL NMOS)
I OUT -LILO 7 50 mA
(SMALL NMOS TO LARGE NMOS TRANSITION)
Figure 4. Mode Transition
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
4
Product Folder Links: LM3686
Copyright ? 2008–2013, Texas Instruments Incorporated
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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
LM3686TLX-AADW/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-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