EVB_RT6154BGQW

RT6154BGQW Evaluation Board your power partner. High Efficiency Single Inductor Buck-Boost Converter Purpose The startup voltage of the RT6154B is around 1.8V to 5.5V. When Input voltage is greater than 1.8V in light Load and heavy Load, the RT6154B feedback loop is internally compensated for both Buck and Boost operation and it provides seamless transition between Buck and Boost modes and optimal transient response. Table of Contents Purpose ................................................................................................................................................................. 1 Introduction............................................................................................................................................................ 2 Applications ........................................................................................................................................................... 2 Key Performance Summary Table .......................................................................................................................... 2 Bench Test Setup Conditions ................................................................................................................................. 3 Schematic, Bill of Materials & Board Layout ........................................................................................................... 5 More Information.................................................................................................................................................... 8 Important Notice for Richtek Evaluation Board ....................................................................................................... 8 EVB_RT6154BGQW-00 December 2015 1 http://www.richtek.com RT6154BGQW Evaluation Board your power partner. Introduction General Product Information RT6154B is a high efficiency single inductor Buck-Boost Converter which can operate with wide input voltage such as battery which is higher or lower than the output voltage and it can supply the load current up to 4A. The maximum average current in the switches is limited to a typical value of 5A. The RT6154B feedback loop is internally compensated for both Buck and Boost operation and it provides seamless transition between Buck and Boost modes and optimal transient response. The RT6154B operates at 2.4MHz typical switching frequency in full synchronous operation. The RT6154B operates in Pulse Skipped Modulation (PSM) mode for increasing efficiency during low power RF transmission modes. The Power Save Mode can be disabled, forcing the RT6154B to operate at a fixed switching frequency. The RT6154B output voltage is fixed internally to 3.3V. Product Feature         Operates from a Single Li-ion Cell : 1.8V to 5.5V Fixed Output Voltage 3.3V PSM Operation 3A Maximum Load Capability for VIN > 3.6V, VOUT = 3.3V 2.4MHz (typ.) Switching Frequency Up to 96% Efficiency Input Over Current Limit Internal Compensation Applications  Cellular Phones Portable Hard Disk Drives  PDA  Key Performance Summary Table Key Features Evaluation Board Number : PCB054_V1 Input Voltage Range 1.8V to 5.5V Switching Frequency 2.4MHz Max Output Current 4A Output Voltage Fixed 3.3V Default Marking & Package Type RT6154BGQW, WDFN-14AL 4x3 EVB_RT6154BGQW-00 December 2015 2 http://www.richtek.com RT6154BGQW Evaluation Board your power partner. Bench Test Setup Conditions Headers Description and Placement Please carefully inspect the EVB IC and external components, comparing them to the following Bill of Materials, to ensure that all components are installed and undamaged. If any components are missing or damaged during transportation, please contact the distributor or send e-mail to evb_service@richtek.com Test Points The EVB is provided with the test points and pin names listed in the table below. Test point/ Pin name Signal Comment (expected waveforms or voltage levels on test points) VINA Internal Driver voltage Analog VIN GND Analog Ground Analog Ground. FB Reference voltage Voltage feedback of adjustable versions, must be connected to VOUT on fixed output voltage versions. EN Enable Control BUCK-boost converter output. LX1 Switch Frequency First switching node LX2 Switch Frequency Second switching node VIN Input voltage Power VIN EN Enable Control Enable input (1 enabled, 0 disabled), must not be left open. PS/SYNC Enable/Disable Control Input Enable/disable power save mode (1 disabled, 0 enabled, clock signal for synchronization), must not be left open. PG Power Good Indicator Output. Output power good (1 good, 0 failure; open drain) PGND Power Ground PGND EVB_RT6154BGQW-00 December 2015 3 http://www.richtek.com RT6154BGQW Evaluation Board your power partner. Power-up & Measurement Procedure 1. Connect input power (1.8V < VIN < 5.5V) to VIN test pin. 2. EN short to VIN, PS/SYNC is Low or High, see SW switch is working. 3. Observe the output voltage is correct. Operating Guideline JP1 Setting PS/SYNC Pin Operate Mode VIN PWM GND PSM JP2 Setting Enable Pin (EN) Function VIN Turn on GND Turn off VOUT Setting VOUT = 3.3V EVB_RT6154BGQW-00 December 2015 4 http://www.richtek.com RT6154BGQW Evaluation Board your power partner. Schematic, Bill of Materials & Board Layout EVB Schematic Diagram Bill of Materials Reference Qty Part Number Description Package Manufacture C1 1 C2012X5R1C106KTHN 10µF 0805 TDK C2 1 C3216X5R0J476MT000N 47µF 1206 TDK C3 1 C3216X5R0J476MT000N 47µF 1206 TDK C6 1 C7 1 0805 TDK C9 1 C10 1 0603 TDK GP3 1 VIN GP5 1 VOUT GP6, GP12, GP13 3 GND GP7 1 SCL GP9 1 EN GP10 1 PS/SYNC GP11 1 PG GP14 1 VINA GP15 1 SDA EVB_RT6154BGQW-00 NC C2012X5R1C106KTHN 10µF NC C1608X7R1E104KT000N December 2015 0.1µF 5 http://www.richtek.com RT6154BGQW Evaluation Board your power partner. Reference Qty JP1 1 PS/SYNC JP2 1 EN JP4 1 SIP-3P L1 1 NRS5040T2R2NMGJ R1 1 R2 1 R3 1 NC R6 1 NC U1 1 Z1, Z2 2 FK_1 Z3, Z4, Z5, Z6 4 SIP-1P-M EVB_RT6154BGQW-00 Part Number December 2015 Description Package Manufacture 2.2µH 5040 TAIYO YUDEN 0603 1M00 1% 0Ω 0603 Walsin 0603 1M00 1% 1MΩ 0603 Walsin WDFN-14AL 4x3 RICHTEK Buck-Boost Converter RT6154BGQW 6 http://www.richtek.com RT6154BGQW Evaluation Board your power partner. PCB Layout Top View Bottom View EVB_RT6154BGQW-00 December 2015 7 http://www.richtek.com RT6154BGQW Evaluation Board your power partner. More Information For more information, please find the related datasheet or application notes from Richtek website http://www.richtek.com. Important Notice for Richtek Evaluation Board THIS DOCUMENT IS FOR REFERENCE ONLY, NOTHING CONTAINED IN THIS DOCUMENT SHALL BE CONSTRUED AS RICHTEK’S WARRANTY, EXPRESS OR IMPLIED, UNDER CONTRACT, TORT OR STATUTORY, WITH RESPECT TO THE PRESENTATION HEREIN. IN NO EVENT SHALL RICHTEK BE LIABLE T O BUYER OR USER FOR ANY AND ALL DAMAGES INCLUDING WITHOUT LIMITATION TO DIRECT, INDIRECT, SPECIAL, PUNITIVE OR CONSEQUENTIAL DAMAGES. EVB_RT6154BGQW-00 December 2015 8 http://www.richtek.com