onsemi NCP6922CBMTTXG

Overview

NCP6922CBMTTXG from onsemi is a mini-power management IC integrating two 800 mA step-down DC-DC converters with dynamic voltage scaling and two 150 mA low-noise LDOs, all controlled via I²C interface; operates from 2.3 V to 5.5 V input, delivers 0.6–3.3 V (12.5 mV steps) from DC-DCs and 1.0–3.3 V (50 mV steps) from LDOs, and targets camera modules and microprocessor power rails in portable battery-powered systems.

For engineers reviewing the NCP6922CBMTTXG datasheet, pinout, applications, or equivalent options, key selection criteria include I²C-programmable output resolution, 95% peak DC-DC efficiency at 3 MHz switching frequency, ultra-low 82 µA quiescent current, 50 µV_RMS LDO noise, and WQFN-20 package thermal performance in space-constrained mobile designs.

Technical Context

The NCP6922CBMTTXG implements voltage-mode control for both synchronous buck converters, supporting dynamic voltage scaling via I²C to adjust core supply voltages in real time during processor load transitions. Each DC-DC channel delivers up to 800 mA with fixed 3 MHz switching frequency and internal compensation.

Its dual LDOs feature low dropout operation (<150 mV at 150 mA), programmable 1.0–3.3 V outputs in 50 mV increments, and 50 µV_RMS output noise-enabling clean biasing of image sensors and audio codecs without external filtering.

Key Specifications

Pinout & Package

Package: 4 mm × 4 mm, 0.5 mm pitch, 20-pin Wettable Flank QFN (WQFN-20) with exposed thermal pad for enhanced PCB heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65136YFFR and RTQ2132B-QA, the NCP6922CBMTTXG offers optimal balance of I²C-based DVS, ultra-low IQ, and compact WQFN-20 footprint for consumer mobile applications where board space and battery life are critical constraints.

Availability

NCP6922CBMTTXG is available at Aetrix Electronics and suitable for camera modules, mobile application processors, and USB-powered portable audio systems requiring stable component supply, consistent parametric performance, and long-term production availability.

Supply support for NCP6922CBMTTXG 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 NCP6922CBMTTXG belongs to onsemi's mini-PMIC family, engineered specifically for space- and power-constrained portable electronics requiring tightly regulated, dynamically scalable multi-rail power delivery.

FAQ

What is the maximum output current per DC-DC channel in the NCP6922CBMTTXG?

The NCP6922CBMTTXG supports up to 800 mA continuous output current per DC-DC channel. This rating is validated across the full input voltage range (2.3 V to 5.5 V) and ambient temperature range (–40 °C to +85 °C), with thermal derating applied above 65 °C case temperature. The NCP6922CBMTTXG integrates synchronous rectification and internal compensation to sustain this current without external current-sense resistors.

Does the NCP6922CBMTTXG support dynamic voltage scaling (DVS) on both DC-DC outputs?

Yes, the NCP6922CBMTTXG supports independent dynamic voltage scaling on both DC-DC outputs via its I²C interface. Each buck converter's output voltage can be adjusted in real time from 0.6 V to 3.3 V in 12.5 mV steps, enabling coordinated voltage/frequency scaling with application processors. The NCP6922CBMTTXG implements dedicated DVS registers and slew-rate control to prevent output overshoot during transitions.

What is the typical output noise specification for the LDOs in the NCP6922CBMTTXG?

The NCP6922CBMTTXG LDOs deliver 50 µV_RMS typical output noise over a 10 Hz to 100 kHz bandwidth, measured with 10 µF ceramic output capacitance. This low noise level is achieved through internal noise-reduction circuitry and optimized pass transistor design, making the NCP6922CBMTTXG suitable for powering noise-sensitive analog circuits such as CMOS image sensor analog front-ends and audio DACs without additional filtering.

Is the NCP6922CBMTTXG pin-compatible with other variants in the NCP6922 family?

Yes, the NCP6922CBMTTXG shares identical pinout and package (WQFN-20) with NCP6922CCMTTXG and all members of the NCP6922x series. Differences between variants are limited to factory-programmed default output voltages and I²C slave addresses; no PCB redesign is required when substituting within the same suffix group. The NCP6922CBMTTXG uses default I²C address 0x34 and ships with 1.2 V DC-DC outputs preconfigured.

What thermal management provisions does the NCP6922CBMTTXG include in its WQFN-20 package?

The NCP6922CBMTTXG uses a wettable flank WQFN-20 package with an exposed thermal pad that must be soldered to a minimum 100 mm² copper pour on the PCB's inner or bottom layer. Thermal resistance θ_JA is 42 °C/W on a 2-layer board with 1 oz copper and 6 thermal vias under the pad. This design enables the NCP6922CBMTTXG to dissipate up to 1.2 W continuously at +25 °C ambient, supporting full 800 mA load on both DC-DCs simultaneously.