onsemi NCP600SN350T1G

Overview

NCP600SN350T1G from onsemi is a fixed-output 3.5 V, 150 mA low-dropout (LDO) linear regulator in TSOP-5 package, featuring 150 mV dropout at full load, ±2% output voltage tolerance over −40 °C to +125 °C, and 50 µV_RMS output noise - designed for noise-sensitive portable battery-powered systems including RF front-ends and camera modules.

For engineers reviewing the NCP600SN350T1G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 3.5 V output accuracy under load/temperature variation, fast 15 µs enable turn-on time, thermal shutdown at 175 °C, compatibility with low-ESR ceramic capacitors, and TSOP-5 footprint suitability for space-constrained PCB layouts.

Technical Context

The NCP600SN350T1G implements a PMOS pass transistor architecture enabling ultra-low dropout and stable operation with 1.0 µF ceramic output capacitors. Its internal bandgap reference and error amplifier deliver high line/load regulation (≤10 mV and ≤30 mV respectively) across input voltages from 1.75 V to 6.0 V.

It integrates active enable control with logic-level threshold (0.9 V high, 0.4 V low), thermal shutdown with 10 °C hysteresis, and current limiting (~550 mA typical short-circuit current). The device operates without external compensation and supports no-load regulation down to 10 µA minimum load.

Key Specifications

Pinout & Package

Package: TSOP-5 (Case 483), 3.00 × 1.50 × 0.95 mm, Pb-free, moisture sensitivity level MSL1/260.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MCP1700T-3502E/TT and TPS7A0535PDBVR, the NCP600SN350T1G offers lower dropout at rated current, tighter output tolerance, and documented thermal hysteresis - making it preferable for thermally constrained, noise-sensitive 150 mA applications where precision and fast enable matter most.

Availability

NCP600SN350T1G is available at Aetrix Electronics and suitable for portable instrumentation, RF front-end power, and camera module designs requiring stable component supply with consistent TSOP-5 footprint and Pb-free compliance.

Supply support for NCP600SN350T1G 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 (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and consumer markets.

The NCP600 series was engineered for portable battery-powered devices demanding low-noise, low-quiescent-current, and fast-enable LDO regulation - targeting space- and power-constrained applications like wearables, IoT edge nodes, and handheld medical instruments.

FAQ

What is the maximum input voltage rating for the NCP600SN350T1G?

The NCP600SN350T1G has an absolute maximum input voltage of 6.5 V. Operation above this level risks permanent damage. For reliable continuous operation, the recommended input range is 1.75 V to 6.0 V - with minimum input determined by dropout: Vin ≥ Vout + V_DO = 3.5 V + 0.125 V = 3.625 V at 150 mA. The NCP600SN350T1G must never be exposed to reverse voltage or transient spikes exceeding 6.5 V.

Does the NCP600SN350T1G require an external bypass capacitor for noise reduction?

No, the NCP600SN350T1G does not require an external bypass capacitor for noise reduction. Its internal design achieves 50 µV_RMS output noise (10 Hz–100 kHz) without one - unlike many competing LDOs that mandate a 10 nF–100 nF capacitor on the ADJ or NR pin. This simplifies layout and reduces BOM count while maintaining low-noise performance essential for RF and precision analog circuits using the NCP600SN350T1G.

What is the function of Pin 5 (NC) on the NCP600SN350T1G TSOP-5 package?

Pin 5 on the NCP600SN350T1G is explicitly designated as "No Connection" (NC) - it is not bonded to the die and carries no internal circuitry. Per the datasheet (Note 1), printed circuit board traces may be routed beneath or adjacent to this pin, but it must remain electrically unconnected. Connecting Pin 5 to any net - including ground or VIN - violates the device's validated design and may cause unpredictable behavior or reliability issues in the NCP600SN350T1G.

How does thermal shutdown behave in the NCP600SN350T1G during sustained overload?

The NCP600SN350T1G activates thermal shutdown at approximately 175 °C junction temperature and remains latched off until junction temperature falls by ~10 °C (hysteresis), then automatically resumes regulation. During sustained overload, this cycle repeats - preventing permanent damage but causing intermittent output. To avoid cycling, ensure PCB copper area ≥645 mm² (1 oz), limit power dissipation using P_D = (V_IN − 3.5 V) × I_OUT + I_GND × V_IN, and verify R_JA ≤ 215 °C/W for TSOP-5 in your layout. The NCP600SN350T1G relies on this behavior for robustness, not continuous operation.

Can the NCP600SN350T1G be used with ceramic output capacitors smaller than 1.0 µF?

No - the NCP600SN350T1G requires a minimum 1.0 µF ceramic output capacitor for guaranteed stability across all operating conditions, as confirmed in the datasheet's APPLICATIONS INFORMATION section and Figure 30 (stability vs. ESR). Using <1.0 µF risks oscillation or load-transient overshoot, especially at high currents or elevated temperatures. The NCP600SN350T1G is optimized for 1.0 µF–10 µF X5R/X7R ceramics; tantalum is acceptable but adds ESR-related trade-offs. Always place the capacitor within 3 mm of VOUT and GND pins.