BD9G101G-EVK-101 ROHM

Datasheet Single-chip Type with Built-in FET Switching Regulators Simple Step-down Switching Regulators with Built-in Power MOSFET BD9G101G General Description Key Specifications The BD9G101G is high voltage input 42V step-down Input Voltage 6V to 42 V switching regulator with integrated internal Power Reference Voltage Precision (Ta=25C) 1.5 % MOSFET. (Ta=-25C to 105C) 2.0 % It provides maximum 0.5A output with small SSOP6 Max Output Current 0.5 A (Max) package. Operating Temperature -40C to +105C It is allowing the use of small inductor by high frequency operation of 1.5MHz. Also, it is implemented to downsize Max Junction Temperature 150C by incorporation of phase compensation parts with current mode. Packages W(Typ) x D(Typ) x H(Max) SSOP6 2.90mm x 2.80mm x 1.25mm Features High and Wide Input Voltage Range (VCC=6V to 42V) 45V/800m Internal Power Nch-FET 1.5MHz Fixed Operating High Frequency Built-in Reference Voltage 0.75V1.5% circuit Built-in Phase Compensation circuit Internal Over Current protection, Under Voltage Lock Out, Thermal shutdown Stand-by function (I =0A) st SSOP6 Small package SSOP6 Applications Industrial distributed power applications Battery powered equipment OA instruments Typical Application Circuits 15000pF L1:6.8H 5V/0.5A LX BST D1 C2:10F/10V GND VCC VCC C1:4.7F/50V FB EN ON/OFF control 0.1F 680 3.9k Figure 1. Typical Application Circuit . Product structure : Silicon integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0Q1Q0AJ00150-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/25 TSZ22111 14 001 11.Dec.2018 Rev.008 BD9G101G Pin Configuration 6 BST 1 LX 5 VCC GND 2 EN FB 3 4 Figure 2. Pin Configuration (TOP VIEW) Pin Description Pin No. Pin Name Description The pin is power supply for floating Power Nch-FET driver. Connected 1 BST 15000pF between this pin and LX pin for bootstrap operation. 2 GND Ground. Voltage feedback pin. This pin is error-amplifier input, the DCDC is set 0.75V 3 FB at this pin with feed-back operation. ON/OFF pin. The IC is start-up to apply 2.0V or over. 4 EN This pin has pull-down resister 550k, the IC is shutdown to open or apply 0.8V or under. Input supply. It should be connected as near as possible to the bypass 5 VCC capacitor. It should be increased impedance by thick PCB pattern. Power Nch-FET switching node pin. It should be connected as near as 6 LX possible to the schottky barrier diode, and inductor. Block Diagram ON/OFF EN VCC TSD UVLO Reference REG Current Sense VREF AMP shutdown OCP BST FB Current - Comparator + - 0.75V + Error R Q 800m + S AMP VOUT LX Soft Start Oscillator 1.5MHz GND Figure 3. Block Diagram www.rohm.com TSZ02201-0Q1Q0AJ00150-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/25 TSZ22111 15 001 11.Dec.2018 Rev.008