BD83850GWL-E2 ROHM

Single-chip Type with Built-in FET Switching Regulator Series Boost and Inverted Output Power Supply for TFT-LCD Displays BD83850GWL General Description Key Specifications BD83850GWL is a boost switching regulator and charge Input Voltage Range 2.5V to 4.5V pump inverter for small TFT-LCD Displays. It has a wide Output Boost Voltage 5.0V(typ) input voltage range of 2.5V to 4.5V that is suitable for Output Inverted Voltage -5.0V(typ) portable applications. In addition, its small package Maximum Current 50mA(max) design is ideal for miniaturizing the power supply. Operating Frequency 1.0MHz(typ) Efficiency >85 %(typ) Features Wide input voltage range of 2.5V to 4.5V Output Voltage Accuracy 2 %(typ) High frequency operation Standby Current 1A(max) Output Discharge Independent ON/OFF signal(STBYP, STBYN) Package W(Typ) x D(Typ) x H(Max) Circuit protection Over Current Protection (OCP) Short Current Protection (SCP) Under Voltage Lock Out (UVLO) Thermal Shutdown (TSD) Applications TFT LCD Smart phones TFT LCD Tablets UCSP50L1C 1.80mm x 1.50mm x 0.57mm Typical Application Circuit LLX 4.7H LX VREG VIN VIN 2.5V to 4.5V C1 CVREG 4.7F 4.7F PGND1 PGND2 V+ VOUTP 5.0V/max50mA AGND CVOP 4.7F CP1 STBYP CCP 2.2F STBYN CP2 V- VOUTN -5.0V/max50mA CVON 4.7F Figure 1. Application Circuit Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays . www.rohm.com TSZ02201-0242AAJ00160-1-2 2014 ROHM Co., Ltd. All rights reserved. 1/19 TSZ22111 15 001 28.Jan.2015 Rev. 001 BD83850GWL Contents General Description .................................................................................................................................................... 1 Features ....................................................................................................................................................................... 1 Applications ................................................................................................................................................................ 1 Key Specifications ...................................................................................................................................................... 1 Package W(Typ) x D(Typ) x H(Max) ....................................................................................................................... 1 Typical Application Circuit ......................................................................................................................................... 1 Pin Configuration ........................................................................................................................................................ 3 Pin Description............................................................................................................................................................ 3 Block Diagram ............................................................................................................................................................. 4 Absolute Maximum Ratings (Ta = 25C) ................................................................................................................... 4 Recommended Operating Conditions ...................................................................................................................... 4 Electrical Characteristics (Unless otherwise specified V =3.7V Ta=25C) .......................................................... 5 IN Typical Performance Curves ..................................................................................................................................... 6 Application Information ........................................................................................................................................... 11 Description of Protection Circuits ....................................................................................................................... 11 Application Example ............................................................................................................................................. 13 Selection of External Components ...................................................................................................................... 13 Power Dissipation ..................................................................................................................................................... 14 I/O Equivalent Circuit ............................................................................................................................................... 15 Operational Notes ..................................................................................................................................................... 16 Ordering Information ................................................................................................................................................ 18 Physical Dimension, Tape and Reel Information ................................................................................................... 18 Revision History ....................................................................................................................................................... 19 www.rohm.com TSZ02201-0242AAJ00160-1-2 2014 ROHM Co., Ltd. All rights reserved. 2/19 TSZ22111 15 001 28.Jan.2015 Rev. 001