BD71850MWV数据手册集成电路（IC）的线性稳压器控制器规格书PDF

描述 Description

BD71850MWV是运用罗姆此前积累的处理器用电源技术，集成了i.MX 8M Nano Family处理器所需的电源和功能的PMIC。内置适用于i.MX 8M Nano Family的电源ON/OFF时序器，不仅可以实现小型化，还容易进行应用设计，有助于大幅削减开发周期。



集成了控制逻辑、降压DC/DC转换器（Buck Converter）6ch、LDO6ch，只需1枚芯片，即可向处理器，以及应用所需的DDR存储器供电。而且内置SDXC卡用1.8V/3.3V开关、32.768kHz晶体振荡器的缓存、各种保护功能（各电源系统的输出短路、输出过电压、输出过电流和热关断）。配备高功率转换效率为95%的降压DC/DC转换器，可在1节Li-Ion电池到USB的大输入电压范围（2.7V~5.5V）内工作，是适合i.MX 8M Nano Famil适用领域的PMIC。

特性 Features

• 6 Buck Regulators
2.0 MHz Switching Frequency. (BUCK1, BUCK2, BUCK5, BUCK7, and BUCK8).
1.5MHz Switching Frequency. (BUCK6)
Target Efficiency: 83% to 95%.
Output Current & Voltage.
BUCK1: 3.0 A, 0.7 V to 1.3 V/10 mV step, DVS
BUCK2: 3.0 A, 0.7 V to 1.3 V/10 mV step, DVS
BUCK5: 3.0 A, 0.70 V to 1.35 V/8steps, DVS
BUCK6: 3.0 A, 2.6 V to 3.3 V/100 mV step
BUCK7: 1.5 A, 1.605 V to 1.995 V/8steps
BUCK8: 3.0 A, 0.8 V to 1.4 V/10 mV step
• 6ch Linear Regulators (6 LDOs)
LDO1: 10 mA, 3.0 V to 3.3 V, 1.6 V to 1.9 V
LDO2: 10 mA, 0.9 V, 0.8 V
LDO3: 300 mA, 1.8 V to 3.3 V
LDO4: 250 mA, 0.9 V to 1.8 V
LDO5: 300 mA, 0.8 V to 3.3 V
LDO6: 300 mA, 0.9 V to 1.8 V
• Power Mux Switch
1.8V Input: 500 mΩ(Max)
3.3V Input: 500 mΩ(Max)
• 32.768 kHz Crystal Oscillator Driver
• Power Button Detector
• Protection and Monitoring: Soft Start, Power Rails Fault Detection, UVLO, OVP and TSD
• OTP Configurable Power Sequencing
• OTP and Software Programmable Output Voltage, Ramp rates.
• Hardware Signaling with SoC for Transition into or out of Low Power States
• Interfaces:
I²C: 100 kHz/400 kHz, 1 MHz
Power-on Reset Output: POR_B, RTC_RESET_B,
Watchdog Reset Input: WDOG_B:
Power State Control: PMIC_STBY_REQ, PMIC_ON_REQ, PWRON_B
Interrupt to SoC: IRQ_B
• Type3 PCB Applicable