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STM32H7B3AI 数据表(PDF) 87 Page - STMicroelectronics |
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STM32H7B3AI 数据表(HTML) 87 Page - STMicroelectronics |
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87 / 238 page  Table 27. SMPS step-down converter characteristics for external usage Symbol Conditions Min Typ Max Unit VDDSMPS(1) VOUT = 1.8 V 2.3 - 3.6 V VOUT = 2.5 V 3 - 3.6 VOUT(2) IOUT=600 mA 2.25 2.5 2.75 V 1.62 1.8 1.98 IOUT internal and external usage - - 600 mA External usage only(3) - - 600 RDSON - - 100 120 mΩ IDDSMPS_Q Quiescent current - 220 - µA TSMPS_START VOUT = 1.8 V - 270 405 µs VOUT = 2.5 V - 360 540 1. The switching frequency is 2.4 MHz±10% 2. Including line transient and load transient. 3. These characteristics are given for SMPSEXTHP bit is set in the PWR_CR3 register. The SMPS current consumption can be determined using the following formula based on the maximum LDO current consumption provided in Section 6.3.7 Supply current characteristics: IDDSMPS=IDDLDO× VCORE÷ VDD×efficency where IDDLDO is the current in LDO configuration given in the following tables VCORE is the digital core supply (VCAP) Efficiency is defined in the following curves. STM32H7B3xI Operating conditions DS13139 - Rev 8 page 87/238 |
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