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参数资料
| 型号： | LM3686TLX-AAEF/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 6/27页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC .9A TRPL 12USMD |
| 标准包装： | 3,000 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 3 |
| 输出电压： | 1.2V，1.8V，3V |
| 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： | 带卷 (TR) |
| 供应商设备封装： | 12-uSMD |
| 其它名称： | LM3686TLX-AAEF |
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SNVS520E – AUGUST 2008 – REVISED MAY 2013
Operating Ratings
Input Voltage Range V BATT
(DC-DC & LDO)
Junction Temperature (T J ) Range
Ambient Temperature (T A ) Range (1)
2.7V to 5.5V
-40°C to + 125°C
-40°C to + 85°C
(1)
In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may
have to be derated. Maximum ambient temperature (T A-MAX ) is dependent on the maximum operating junction temperature (T J-MAX-OP =
125°C), the maximum power dissipation of the device in the application (P D-MAX ), and the junction-to ambient thermal resistance of the
part/package in the application ( θ JA ), as given by the following equation: T A-MAX = T J-MAX-OP – ( θ JA × PD-MAX ).
Thermal Properties
Junction-to-Ambient Thermal Resistance ( θ JA ) (1)
DSBGA 12
120°C/W
(1)
Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power
dissipation exists, special attention must be paid to thermal dissipation issues in board design.
Electrical Characteristics
Linear Regulator — LILO (EN_DCDC = EN_LILO = ON - Large NMOS) (1) (2) (3) (4)
Limits in standard typeface are for T A = 25°C. Limits appearing in boldface type apply over the full operating ambient
temperature range: -40°C ≤ T A = T J ≤ +85°C. Unless otherwise noted, specifications apply to the closed loop typical
application circuits (linear regulator) with V IN_LDO = V BATT = 3.6V (5) , V IN_LILO = V OUT_DCDC(NOM) , V EN (All) = V BATT , C IN_DC = 4.7 μF,
C OUT_LILO = 2.2 μF , C IN_LDO = 1.0 μF , C OUT_LDO = 1.0 μF ,C OUT_DC = C IN_LILO = 10 μF
Symbol
Parameter
Condition
Min
Limits
Typ
Max
Units
Δ V OUT_LILO /
Output Voltage
I OUT_LILO = 1 mA to 350 mA
1.2
V OUT_LILO
Accuracy,
V IN_LILO = V OUT_DCDC
1.176
1.224
V
V OUT_LILO
V BATT = 3.6V
Δ V OUT_LILO / Δ mA Load Regulation (6)
I OUT_LILO = 1 mA & 350 mA
V IN_LILO = V OUT_DCDC
4
12
μV/mA
V BATT = 3.6V
V BATT = V OUT_LILO + 1.5V
50
80
mV
V DROP
Dropout Voltage
(7)
(V IN_LILO disconnected from
V OUT_DCDC ),
I OUT = 350 mA
I Q_VIN_LILO
I SC_LILO
Quiescent Current
Short Circuit Current
V BATT = V IN_LILO = 3.6V
V OUT = GND (V OUT_LILO = 0 )
400
70
90
μA
mA
Limit
(1)
(2)
(3)
(4)
(5)
(6)
(7)
All voltages are with respect to the potential at the GND pin.
Min and Max limits are specified by design, test, or statistical analysis. Typical (typ.) numbers represent the most likely norm. Unless
otherwise specified, conditions for typ. specifications are: V BATT = 3.6V and T A = 25°C.
The parameters in the electrical characteristic table are tested at V BATT = 3.6V unless otherwise specified. For performance over the
input voltage range refer to datasheet curves.
The input voltage range recommended for ideal applications performance for the specified output voltages is given below:V BATT = 2.7V
to 5.5V for 1.0V ≤ V OUT_DCDC < 1.8VV BATT = (V OUT_DCDC + 1V) to 5.5V for 1.8V ≤ V OUT_DCDC < 3.6V
VIN_LDO must be ON at all time for biasing internal reference circuits
To calculate the output voltage from the load regulation specified, use the following equation: Δ V OUT = Load Regulation (%/mA) x
Nominal V OUT (V) x Δ I OUT (mA).
Dropout voltage is defined as the input to output voltage differential at which the output voltage falls to 100 mV below the nominal output
voltage.
6
Product Folder Links: LM3686
Copyright ? 2008–2013, Texas Instruments Incorporated
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