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STPM098C 数据表(PDF) 16 Page - STMicroelectronics |
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STPM098C 数据表(HTML) 16 Page - STMicroelectronics |
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16 / 110 page  3.1.3 VREF2 regulator The internal supply rail for the PWM output buffer is generated by a current limited LDO regulator with a PMOS output stage and an external tank capacitance supplied by VCC pin. Additionally, the VREF2 regulator is intended as a supply voltage for external pull-up resistances (4.7 kΩ) of PMBus™ pins SM_DATA, SM_CLK and SM_ALERT. Figure 10. VREF2 regulator simplified block diagram VCC CFILT/VREF2 GND - + GND VBG CVREF2 PWM Buffers PWMn RPU =4.7kΩ RPU =4.7kΩ SM_DATA SM_CLK SM_ALERT RPU =4.7kΩ Table 11. VREF2 regulator electrical characteristics Symbol Parameter Test condition Min Typ Max Unit Notes VREF2_iout VREF2 rated output current 0 - 100 mA Total load = ext.+ int. VREF2_vout VREF2 output voltage Iload = 0-100 mA CVREF2 = 4.7 µF 3 3.3 3.6 V Total load = ext.+ int. VREF2_ilim VREF2 current limitation VREF2 = 0 V 110 200 330 mA Total load = ext.+ int. VREF2_load_srv VREF2 static load regulation voltage VCC = 5 V Iload = 0-100 mA CVREF2 = 4.7 µF -15 - 15 mV Total load = ext.+ int. VREF2_load_trv VREF2 transient load regulation voltage VCC = 5 V Iload = 0-100 mA dIload/dt = 100 mA/µs CVREF2 = 4.7 µF -50 - 50 mV Total load = ext.+ int. Guaranteed by design T_vref2_boot_time VREF2 boot time VREF2 10% to 90% Iload = 100 mA CVREF2= 4.7 µF 0.07 0.1 0.2 ms - VREF1_ext_cap External capacitor ESR = 2 mΩ 3.76 4.7 5.64 μF Application information STPM098C Functional description DS14440 - Rev 1 page 16/110 |
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