onsemi NCP10970 Dual Output HV Buck Switchers

onsemi NCP10970 Dual Output HV Buck Switchers are an auxiliary power solution. The NCP10970 switchers are optimized for a microcontroller unit or a digital signal processor- (DSP) based system. onsemi NCP10970 devices include a high-voltage switcher, a linear regulator, and dedicated comparator circuitry. The switcher is suitable for building output voltage up to 16V that is adjustable by the resistor divider on the FB pin and protected against short-circuits. The dedicated internal circuitry prevents continuous conduction mode (CCM) operation and improves surge robustness, efficiency, and EMI. Typical applications include power management for smart lighting, white goods, IoT, MCU- and DSP-based lighting drivers/ballasts, and industrial multiple-output auxiliary power solutions.

Features

Highly integrated multiple blocks
- 670V input buck switcher
- 3.3V/100mA LDO (A1 option)
- 5V/100mA LDO (B1 option)
Dual output buck
Standby mode by MCU
Protections/utility functions
- Fault in/out pin
- Fast response comparator
- Demagnetization detection
Short-circuit protection on the buck and LDO - internal thermal shutdown
Patented V_RAW generation for the LDO input
High-voltage start-up current source

Built-in 670V and 18Ω R_DS(on) lateral MOSFET
Fixed-frequency DCM current-mode control scheme
4ms soft start
Low LDO power loss
Low no-load input power
High system reliability
Flexible design with overtemperature protection (OTP)/overcurrent protection (OCP)
Stable operation without CCM
Easy to pass safety certification
Achieve good standby power performance
16-pin SO package with creepage distance
Small form factor design