cypress公司的S6BP201A是有四個內置開關FET的降壓-升壓DC/DC轉換器，輸入電壓從2.5V到42V，負載電流高達1.0A，在低負載時能自動改變到PFM模式，以得到超高效率，靜態電流非常低20uA，工作頻率200kHz到2.1MHz，可選擇的輸出電壓5.000V/5.050V/5.075V/5.100V/5.125V/5.150V/5.200V，和規范AEC-Q100兼容（Grade-1），主要用在車體控制模塊（BCM），網關模塊，汽車應用和工業應用。本文介紹了S6BP201A主要特性，框圖和架構框圖，應用電路以及評估板S6SBP201A1AVA1001，S6SBP202A1FVA1001和S6SBP203A8FVA1001，框圖和指標，框圖，電路圖，材料清單和PCB設計圖。

S6BP201A is a 1-Ch Buck-boost DC/DC converter IC with four built-in switching FETs. This IC is able to supply up to 1.0A of loadcurrent within the very wide range from 2.5V to 42V in the input voltage. This IC has an operation mode that is automatically changedto PFM operation during low load， which can achieve super-high efficiency with a very low quiescent current 20 μA. It is possible toprovide stable output voltage from an automotive cold cranking and load dump， up to 42V， conditions within 1 ms transition time. As aresult， this IC is suitable for power supply solutions of automotive and Industrial applications. This IC has the SYNC function， which iscapable of selecting the SYNC_IN that is able to inputs an external clock signal. When an external clock signal in the range from 200kHz to 400 kHz is inputted， the FETs perform the switching operation with synchronizing signal from an external clock. When anexternal clock signal is not inputted， the FETs perform the switching operation from an internal clock. The internal clock signal in therange from 200 kHz to 2.1 MHz can be set by an external resistor. Since external voltage setting resistors and phase compensationcapacitors are not required with this IC， it can reduce the number of parts and a part mounting area. This IC has five protectionfunctions， input under voltage lockout （input UVLO）， output under voltage protection （output UVP）， output over voltage protection（output OVP）， output over current protection （output OCP）， and thermal shutdown （TSD）。 Moreover， this IC has the power good （PG）function that indicates the state of the output voltage （VOUT pin）。 When the output voltage reaches the PG voltage， the PG signal isoutputted. The VOUT output voltage of this product is selectable from the product lineup.

S6BP201A主要特性：

? Wide input voltage range： 2.5V to 42V

? Selectable output voltage （factory settable）：

5.000V/5.050V/5.075V/5.100V/5.125V/5.150V/5.200V

? Wide operating frequency range： 200 kHz to 2.1 MHz

? External synchronized clock range： 200 kHz to 400 kHz

? SYNC function

? SYNC_IN： External clock input（Unless inputting clock， this IC operates by internal clock）

? Super-high efficiency by PFM operation（When setting MODE pin to a low level）

? Automatic PWM/PFM switching operation and fixed PWMoperation are selectable by MODE pin

? Built-in switching FET

? Synchronous current mode architecture

? Shutdown current： Lower than 1 μA

? Quiescent current： 20 μA

? Power Good Monitor

? Output voltage monitoring by window comparator

? Power-on reset time： 14 ms

? Soft start time without load dependence ： 0.9 ms（When switching frequency =2.1 MHz）

? Enhanced protection functions

? Input under voltage lockout

? Output under voltage protection： 95.5%

? Output over voltage protection： 104.5%

? Output over current protection

? Thermal shutdown

? Small ETSSOP16 package （exposed PAD）： 5 mm × 6.4 mm

? AEC-Q100 compliant （Grade-1）

S6BP201A應用：

? Body Control Module （BCM）

? Gateway module

? Automotive applications

? Industrial applications

圖1. S6BP201A框圖

圖2. S6BP201A架構框圖

圖3. S6BP201A應用案例電路圖

應用案例電路元件列表：

評估板S6SBP201A1AVA1001，S6SBP202A1FVA1001和S6SBP203A8FVA1001

S6SBP201A1AVA1001， S6SBP202A1FVA1001 and S6SBP203A8FVA1001 are the evaluation kit forprimary power block of automotive.

These boards implement power management IC S6BP201A， S6BP202A， S6BP203A each.

It is necessary to prepare DC power supply.

圖4.評估板S6SBP201A1AVA1001，S6SBP202A1FVA1001和S6SBP203A8FVA1001框圖

評估板S6SBP201A1AVA1001，S6SBP202A1FVA1001和S6SBP203A8FVA1001指標：

圖5.評估板電路圖

評估板S6SBP201A1AVA1001，S6SBP202A1FVA1001和S6SBP203A8FVA1001材料清單：

圖6.評估板元件布局圖

圖7.評估板線布局圖