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Part Number: NX1117CADJZ

Marking Code : NCADJZ

Function: LDO Voltage Regulator, 20VIN ADJ 1A ( Output = 1.25 adjustable )

Package: SOT-223 Type

Image and Pinouts:

NX1117CADJZ datasheet

Description

The NX1117CADJZ, NX1117C / NX1117CE are two series of low-dropout positive voltage regulators with an output current capability of 1 A. The two series consist of 18 fixed output voltage versions and two adjustable output voltage versions. The regulators feature output current limiting, Safe Operating Area (SOA) control, and thermal shutdown.

Features

Output current up to 1A
Adjustable output voltage via external resistor divider
Wide input voltage range: up to 20V
Low dropout voltage (typically ~1.1V at 1A)
High output voltage accuracy: ±1% / ±1.25%
No minimum load requirement (fixed versions)
Built-in thermal shutdown protection
Output current limiting
Safe Operating Area (SOA) protection
Wide operating temperature range

Design Notes

Ensure input voltage exceeds output voltage by at least the dropout voltage (~1.1V)
Output capacitor ESR is important for stability—follow datasheet recommendations
Thermal dissipation can be significant: P = (V_IN − V_OUT) × I_OUT
Use adequate copper area or heatsink for high current applications
Suitable as a post-regulator after switching converters to reduce ripple/noise
Avoid excessive input voltage to minimize power loss

Advantages

Simple design with minimal external components
Stable and low-noise output
Flexible adjustable output
Integrated protection features improve reliability

Typical Applications

Post-regulation for DC-DC converters
Point-of-load regulation in digital systems
Battery-powered devices
USB-powered circuits
Consumer electronics and industrial control systems
Hard disk drive and embedded controller supplies

Alternative / Equivalent Products

LM1117 – Industry-standard LDO regulator
AMS1117 – Widely used low-cost alternative
LD1117 – STMicroelectronics LDO
TLV1117 – TI improved LDO version
AP1117 – Diodes Inc. regulator

NX1117CADJZ Datasheet PDF Download

Other data sheets are available within the file:

7CE18Z, N7C25Z, NX1117C12Z, NX1117C18Z, NX1117C20Z

Description

This is Off-Line Quasi-Resonant Flyback Switching Regulator. The STR-W6554A is a quasi-resonant PWM controller IC with an integrated power MOSFET, designed for off-line switching power supplies in a compact package. It features low standby power consumption, built-in protection functions, and low noise operation suitable for energy-efficient designs. This device is commonly used in AC-DC adapters, LCD TV power supplies, and home appliance SMPS circuits.

Features

Built-in high-voltage power MOSFET

Quasi-resonant operation for high efficiency

Low standby power consumption

Auto-restart protection for overload and short circuit

Overcurrent protection (OCP)

Overvoltage protection (OVP)

Thermal shutdown protection

Low EMI noise characteristics

Pinouts