onsemi NCP6914AFCBT1G

Overview

NCP6914AFCBT1G from onsemi is a 5-channel power management IC integrating one 800 mA step-down DC-DC converter with Dynamic Voltage Scaling (DVS) and four 300 mA low-noise, low-dropout regulators (LDOs), all in a 1.77 × 2.06 mm WLCSP20 package. It operates from 2.3 V to 5.5 V input, delivers programmable output voltages (DCDC: 0.6–3.3 V in 12.5 mV steps; LDOs: 1.0–3.3 V in 50 mV steps), and supports I²C control (up to 3.4 MHz) for use in battery-powered camera subsystems and application processors.

For engineers reviewing the NCP6914AFCBT1G datasheet, pinout, applications, or equivalent options, key selection considerations include its factory-programmed power-up sequence (LDO1/LDO2 at 1.8 V → LDO3/LDO4 at 2.8 V → DCDC at 2.8 V), 50 µVrms LDO output noise, 72 µA quiescent current at no load, and hardware enable (HWEN) with internal pull-down for robust system-level power sequencing.

Technical Context

The NCP6914AFCBT1G implements a synchronous buck converter operating at 3 MHz (±15%) with integrated high-side (230 mΩ) and low-side (200 mΩ) MOSFETs, supporting auto PFM/PWM mode switching and DVS ramping (default 12.5 mV/1.33 s). Its four LDOs feature independent input pins (VIN12, VIN3, VIN4), active output discharge, and 75 dB PSRR at 1 kHz - enabling clean, sequenced rail generation for image signal processors and baseband SoCs.

Control is delivered via a 400 kHz / 3.4 MHz I²C interface with register-accessible configuration of power-up delays, DVS targets, SYNC ratio (1–12), and interrupt masking. Hardware signals include open-drain PG (AND-combined channel power-good), INTB (dual-edge interrupt), HWEN (active-high enable with 4–9 µs filter), and SYNC (external clock synchronization up to 100 MHz input).

Key Specifications

Pinout & Package

Package: 20-pin Wafer-Level Chip-Scale Package (WLCSP), Case 567CV, 1.77 mm × 2.06 mm, 0.40 mm pitch, Pb-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail PMIC applications.

Compared with TPS65132A1YFFT and RT5782AZSP, the NCP6914AFCBT1G uniquely combines DVS, factory-programmable sequencing, and external clock synchronization in a 1.77 × 2.06 mm WLCSP - making it optimal for space-constrained, dynamically scaled mobile imaging platforms.

Availability

NCP6914AFCBT1G is available at Aetrix Electronics and suitable for mobile camera modules, smartphone application processors, and portable media players requiring stable component supply across extended production lifecycles.

Supply support for NCP6914AFCBT1G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP6914AFCBT1G belongs to onsemi's mini PMIC family, designed specifically for battery-powered portable sub-systems - emphasizing ultra-low quiescent current, compact WLCSP packaging, and flexible I²C-programmable power sequencing for camera and application processor power domains.

FAQ

What is the default power-up sequence for the NCP6914AFCBT1G?

The NCP6914AFCBT1G has a factory-programmed 6-step power-up sequence: LDO1 and LDO2 enable at 2 ms (1.80 V), LDO3 and LDO4 enable at 4 ms (2.80 V), and the DCDC converter enables at 6 ms (2.80 V). This sequence is stored in non-volatile registers and executed automatically upon HWEN assertion, ensuring safe SoC initialization without external timing components.

Does the NCP6914AFCBT1G support Dynamic Voltage Scaling (DVS) on its DCDC output?

Yes, the NCP6914AFCBT1G supports DVS on its DCDC converter with smooth, controlled ramping between voltage setpoints. The default ramp rate is 12.5 mV per 1.33 seconds, configurable via I²C registers (TIME register DVS[1:0] bits). DVS enables real-time core voltage adjustment for ARM-based processors during varying workload conditions without system interruption.

What is the maximum input voltage rating for the NCP6914AFCBT1G?

The NCP6914AFCBT1G has an absolute maximum input voltage rating of +6.0 V on all power pins (AVIN, PVIN1, VIN12, VIN3, VIN4), with recommended operating range of 2.3 V to 5.5 V. Operation above 5.5 V risks permanent damage, and under-voltage lockout activates below 2.3 V (with 200 mV hysteresis), ensuring reliable startup across the full Li-Po battery discharge curve.

How does the NCP6914AFCBT1G handle thermal protection?

The NCP6914AFCBT1G integrates thermal shutdown at 150°C (typical) and a thermal warning interrupt at 135°C. When temperature exceeds 135°C, INTB asserts to notify the host processor; if it reaches 150°C, all outputs disable immediately. Hysteresis of 35°C ensures stable re-entry after cooling. Thermal behavior is active only during enabled operation - not in sleep or off modes.

Can the NCP6914AFCBT1G synchronize its DCDC switching frequency to an external clock?

Yes, the NCP6914AFCBT1G supports external synchronization via the SYNC pin. It accepts input frequencies from 2.55 MHz to 100 MHz, divides them using the SYNCRATIO[4:0] register (1–12), and locks to the result if within ±15% of 3 MHz. With SYNCAUTO = 1, it automatically switches between internal and external clock based on validity - critical for EMI reduction in synchronized multi-PMIC systems.