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S P 7 6 4 8
L o w R e f e r e n c e H i g h E f f i c i e n c y B o o s t R e g u l a t o r
PIN DESCRIPTION
Name
V BATT
FLASH
NC (Test)
R LIM
SHDN
FB
GND
PGND
LX
V OUT
GND
Pin Number
1
2
3
4
5
6
7
8
9
10
Thermal Pad
Description
Battery Voltage.
The startup circuitry is powered by this pin. Battery Voltage is used to calculate switch
off time: T OFF = K OFF / (V OUT -V BATT ). When the battery voltage drops below 0.61V the
SP7648goes into an undervoltage lockout mode (UVLO), where the part is shutdown.
Reference Control Input.
Internal Reference defaults to 0.8V if FLASH= LOW and 0.288V if FLASH = HIGH.
No connection.
This pin is bonded out for test purposes only and must be left floating in all applications.
Current Limit Resistor.
By connecting a resistor R LIM from this pin t ground the inductor peak current is set by
I PEAK =1600/R LIM . The range for R LIM is 9k ? (for 180mA) to 1K ? (for 1.6A).
Shutdown Not.
Tie this pin high to V BATT , for normal operation. Pull this pin to ground to disable all
circuitry inside the chip.
Feedback.
Connect this pin to GND for fixed +5V operation. Connect this pin to a resistor voltage
divider between V OUT and GND for adjustable output operation.
Ground.
Connect to ground plane.
Power Ground.
The inductor charging current flows out of this pin.
Inductor Switching Node.
Connect one terminal of the inductor to the positive terminal of the battery. Connect
the second terminal of the inductor to this pin. The inductor charging current flows into
LX, through the internal charging N-channel FET, and out the PGND pin.
Output Voltage.
The inductor current flows out of this pin during switch off-time. It is also used as the
internal regulator voltage supply. Connect this pin to the positive terminal of the output
capacitor.
Connect to ground signal.
ORDERING INFORMATION
Part Number
SP7648ER-L
SP7648ER-L/TR
SP7648EU-L
SP7648EU-L/TR
Ambient
Temperature
Range
-40°C ≤T A ≤+85°C
- 40°C≤T A ≤+85°C
Marking
SP76
48ER
WWX
7648
EXXX
YWW
Package
DFN-10
MSOP-10
Packing
Quantity
Bulk
3K/Tape & Reel
Bulk
2.5K/Tape & Reel
Note 1
Note 2
“YY” = Year – “WW” = Work Week – “X” = Lot Number ; when applicable.
? 2012 Exar Corporation
4/13
Rev. 2.0.0
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相关代理商/技术参数
SP7648ER 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Low Reference High Efficiency Boost Regulator
SP7648ER/TR 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:PackageLow Reference High efficiency Boost Regulator
SP7648ER-L 功能描述:LED照明驱动器 Efficiency Boost Regulator RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
SP7648ER-L/TR 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
SP7648EU 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual
SP7648EU/TR 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Low Reference High Efficiency Boost Regulator
SP7648EU-L 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
SP7648EU-L/TR 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK