EL7512C Elantec Semiconductor, EL7512C Datasheet
EL7512C
Available stocks
Related parts for EL7512C
EL7512C Summary of contents
Page 1
... When shut down, it draws <3µA of current. This feature, along with the minimum starting voltage of 2V, makes it suitable for portable equipment powered by one lithium ion NiMH cells. The EL7512C is available in a 10-pin MSOP package, with maximum height of 1.1mm. With proper external components, the whole con- 2 verter takes less than 0 ...
Page 2
... EL7512C - Preliminary High Frequency PWM Step-Up Regulator Absolute Maximum Ratings Values beyond absolute maximum ratings can cause the device to be pre- maturely damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied V , LBI Important Note: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the ...
Page 3
... Block Diagram 10k FB MAX_DUTY RT Reference 100k Generator VREF VRAMP EN LBO LBI - + 210mV EL7512C - Preliminary High Frequency PWM Step-Up Regulator V OUT 80.6k 4.7nF VDD Thermal Shut-down PWM PWM Logic Comparato - Start-up Oscillator + I LOUT SGND 3 15µ 47µF 10µF LX 0.3 12µA 7.2k 80m SS PGND ...
Page 4
... EL7512C - Preliminary High Frequency PWM Step-Up Regulator Typical Performance Curves Efficiency V =3.3V, V =12V IN O 100 =670kHz 110 I (mA 1400 R 1200 1000 R 800 R 600 R 400 200 (V) DD Internal REF J 1.4 1.35 1.3 1.25 1.2 1.15 1.1 1.05 V =12V ...
Page 5
... Power-Up V =5V, V =12V, I =300mA EL7512C - Preliminary High Frequency PWM Step-Up Regulator Steady State Operation (inductor discontinuous conduction) V =5V, V =12V, I =25mA Load Transient Response V =5V, V =12V, I =50mA-300mA ...
Page 6
... EL7512C - Preliminary High Frequency PWM Step-Up Regulator Applications Information The EL7512C is a step-up regulator, operated at fixed frequency pulse-width-modulation (PWM) control. The input voltage is 2V-12V and output voltage is 5V-16V. The switching frequency (up to 1.2MHz) is decided by the resistor connected to RT pin. Start-up After VDD reaches a threshold of about than 2V, the power MOSFET is controlled by the start-up oscillator, which generates fixed duty-ratio of 0 ...
Page 7
... PGND pins. Maximizing the copper area around these pins is preferable. In addition, a solid ground plane is always helpful for the EMI performance. The demo board is a good example of layout based on these principles. Please refer to the EL7512C Applica- tion Brief for the layout ...
Page 8
... EL7512C - Preliminary High Frequency PWM Step-Up Regulator Package Outline Drawing NOTE: The package drawing shown here may not be the most recent revision. To verify the latest version, please refer to the Elantec website at: http://www.elantec.com/pages/package_outline.html 8 ...
Page 9
... EL7512C - Preliminary High Frequency PWM Step-Up Regulator General Disclaimer Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the cir- cuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement ...