High Performance Regulated Charge Pump. Features

Transcription

1 High Performance Regulated Charge Pump General Description The is a high performance charge pump DC/DC converter that produces a regulated V output. No external inductor is required for operation. The operating voltage range is 2.8V to V. Internal soft-start circuitry effectively reduces the in-rush current both while start-up and mode change. The features very low quiescent current, over current protection and short circuit protection. The is available in SOT2- package. Order Information F: Pb-Free Features 2x Mode for Ultra-High Efficiency 2.8V to V Range Input Voltage Soft Start Function Built-In Short-Circuit Protection 0KHz Fixed frequency Built-in Thermal Protection Over Current Protection Function I SD<uA in Shutdown SOT2- Package RoHS Compliant and 00% Lead (Pb)-Free Typical Application Circuit Applications Package Type B: SOT2- LCD Panel Cellular and Smart mobile phone PDA/DSC Flash LED Driver uf V_V 2 Marking Information Device Marking Package Shipping LPS DXXX SOT2- K/REEL X: Batch numbers. -0 May marketing@lowpowersemi.com Page of

2 Functional Pin Description Package Type Pin Configurations SOT2- Pin Name Description V Output Voltage. 2 Ground. (Active High). CN Flying Capacitor Negative Terminal. Power Input Voltage. CP Flying Capacitor Positive Terminal. Function Block Diagram CP CN X2 Charge Pump V + - VREF Short Circuit Band Gap VREF OSC 0KHz -0 May marketing@lowpowersemi.com Page 2 of

3 Absolute Maximum Ratings Note Input Voltage to (V IN) V to Voltage (V ) V to V IN+0.V Maximum Power Dissipation (P D) W Thermal Resistance (J A) /W Operating Junction Temperature Range Operation Ambient Temperature Range to 8 Maximum Soldering Temperature (at leads, 0sec) Note. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ESD Susceptibility HBM(Human Body Mode) KV MM(Machine Mode) V Electrical Characteristics (Over recommended operating conditions unless specified otherwise, =.V,=High, TA=2 ) Parameter Symbol Condition Min Typ Max Units Input Voltage 2.8 V V Output Voltage Range V V Quiescent Current IQ No Load 2 ma Shutdown Current ISHDN V = µa Oscillator Frequency fosc 0 KHz Output Short Circuit Current Limit ISC V < 0.V 00 0 ma Enable Threshold Low V(L) 0. V Enable Threshold High V(H). V Input Low Current I = V =.V µa -0 May marketing@lowpowersemi.com Page of

4 Typical Operating Characteristics -0 May Page of

5 Application Information uf Up to pcs White/Blue LED 2 R R2 R R R R Figure: Up to pcs White/Blue LED Driver from Li-Ion Battery Source uf 0uF Up to V 2 LOAD Figure2: Step-up to V with loading application from Li-Ion Battery Source uf Flash WLED Driver Up to 0mA (A) 2 0uF 0R 0R uf ON/OFF 00K (B) 2 0uF Figure: Large Current Flash LED Driver from Li-Ion Battery Source -0 May marketing@lowpowersemi.com Page of

6 Packaging Information SOT2- Package -0 May Page of