My Inquiry
My Account
onsemi NCP1400ASN19T1
- Part No.:
- NCP1400ASN19T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1400ASN19T1.pdf
- Description:
- IC REG BOOST 1.9V 80MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,029
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP1400ASN19T1 from onsemi is a micropower, fixed-frequency PWM step-up DC-DC switching regulator in TSOP-5 package, designed for ultra-low-voltage battery-powered systems. It starts up at 0.8 V, operates down to 0.2 V input, delivers up to 100 mA output current at 1.9 V regulated output, and integrates oscillator, error amplifier, soft-start, and power MOSFET - enabling compact boost converters with only four external components.
For engineers reviewing the NCP1400ASN19T1 datasheet, pinout, applications, or equivalent options, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts, and supply-ready availability details - all specific to the NCP1400ASN19T1 variant with 1.9 V output and 180 kHz switching frequency.
Technical Context
The NCP1400ASN19T1 implements voltage-mode PWM control in discontinuous conduction mode (DCM), with an internal 180 kHz oscillator (±20% tolerance, 0.11%/°C tempco) and phase-compensated error amplifier ensuring stability across full load and input ranges. Its startup logic enables operation from single-cell alkaline or NiMH batteries as low as 0.8 V, while the integrated 350 mA cycle-by-cycle current limit protects the internal MOSFET during transient overloads.
Regulation is achieved via factory-trimmed internal feedback resistors set for 1.9 V ±2.5%, eliminating external resistor networks. The CE pin supports enable/disable control with 150 nA internal pull-up, allowing direct floating for always-on operation or active-low shutdown with <0.3 V threshold - reducing quiescent current to 0.6 µA typical in shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.9 V ±2.5% - factory-trimmed for stable rail generation without external resistors |
| Switching Frequency | 180 kHz ±20% - fixed internal oscillator enables predictable EMI filtering and inductor selection |
| Startup Voltage | 0.8 V typ - enables operation from nearly-dead single-cell batteries (e.g., 0.9 V alkaline) |
| Max Output Current | 100 mA - sufficient for powering white LEDs, low-power sensors, or RF modules from 1-cell sources |
| Operating Current (IDD1) | 23 µA typ at 1.9 V - ultra-low quiescent draw extends battery life in standby-sensitive devices |
| Shutdown Current | 0.6 µA typ - enables multi-year shelf life in energy-harvesting or remote sensor nodes |
| Package | TSOP-5 (Case 483) - 3.0 × 1.5 mm footprint ideal for space-constrained portable PCBs |
Pinout & Package
TSOP-5 package (Case 483), 3.0 mm × 1.5 mm body, 0.95 mm pitch, lead-free (Pb-free) construction per RoHS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable input | Active-high enable: ≥0.9 V = ON; ≤0.3 V = OFF; floating = ON via internal 150 nA pull-up to OUT |
| 2 - OUT | Output voltage monitor & IC power supply | Provides regulated 1.9 V output and powers internal circuitry - must be decoupled with ≥10 µF capacitor |
| 3 - NC | No internal connection | Unbonded pin - must remain unconnected; no routing or soldering required |
| 4 - GND | Ground reference | Common return for input, output, and internal circuits - requires low-impedance one-point grounding per layout guidelines |
| 5 - LX | Switch node | Drain of internal power MOSFET - connects to inductor and Schottky diode anode; handles peak currents up to 350 mA |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low startup voltage | 0.8 V enables use with single-cell alkaline/NiMH batteries at end-of-life (e.g., 0.9 V nominal) |
| Integrated compensation | On-chip phase compensation ensures stable DCM operation without external capacitors or resistors |
| Soft-start circuit | Ramps output to ~1.5 V before regulation engages - prevents inrush current and improves startup under load |
| Current-limited power switch | 350 mA cycle-by-cycle limiting protects internal MOSFET and prevents inductor saturation during transients |
| Pb-free & RoHS compliant | Meets global environmental regulations - suitable for consumer electronics and medical handhelds |
Applications
| White LED Backlighting | Low-Power Sensor Node |
|---|---|
Use Scenario: Powering 1–2 white LEDs (3.0–3.4 V forward) from a single 1.5 V alkaline cell in a handheld barcode scanner. IC Role / Device Role / Timing Role: Step-up regulator providing constant-current drive via external current-sense resistor and PWM dimming control. Use Value: Enables >100 hr runtime from one AA cell by operating down to 0.2 V input and delivering 1.9 V rail to LED driver IC. |
Use Scenario: Supplying 1.9 V to a low-power BLE SoC (e.g., Nordic nRF52810) and MEMS accelerometer in a wireless temperature sensor. IC Role / Device Role / Timing Role: Primary power rail generator during active transmission bursts; enters ultra-low-IQ shutdown between readings. Use Value: Achieves 5+ year battery life using CR2032 coin cell by combining 23 µA operating current and 0.6 µA shutdown draw. |
| Portable Medical Instrument | Electronic Game Console |
Use Scenario: Generating stable 1.9 V for analog front-end (AFE) and microcontroller in a handheld pulse oximeter powered by two AAA cells. IC Role / Device Role / Timing Role: Regulated supply for precision ADC reference and signal conditioning circuitry - critical for measurement accuracy. Use Value: Maintains ±2.5% output accuracy across −40°C to +85°C ambient, supporting clinical-grade performance in field-deployed units. |
Use Scenario: Boosting voltage for LCD display bias and audio amplifier in a handheld gaming device using two NiMH cells (1.2 V each). IC Role / Device Role / Timing Role: Main system rail generator with fast load-transient response to handle burst graphics rendering and audio playback. Use Value: Delivers <15 mV ripple at 30 mA load (Fig. 29) and recovers within 20 µs from 3→30 mA steps - preserving display contrast and audio fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610991DSER | 1.8 V output, 1.2 MHz switching, 400 mA IOUT, WSON-6 package | Higher efficiency at light loads due to DCS-Control™; supports higher output current but requires more external components | Select for designs needing >100 mA or faster transient response; not drop-in due to different pinout and control scheme |
| MAX17222ETA+ | 1.8 V output, 500 kHz switching, 120 mA IOUT, 2 mm × 2 mm TDFN-6 | Lower quiescent current (300 nA shutdown), integrated soft-start, but lacks CE pin - enabled by VIN only | Choose when ultra-low shutdown current is critical and enable control via VIN is acceptable; requires PCB redesign |
Compared with NCP1400ASN19T1, the TPS610991DSER offers higher frequency and output capability but increases BOM count and layout complexity, while the MAX17222ETA+ achieves deeper shutdown current at the cost of flexible enable control - making NCP1400ASN19T1 optimal for cost-sensitive, space-constrained 1-cell systems requiring simple CE-based power sequencing.
Availability
NCP1400ASN19T1 is available at Aetrix Electronics and suitable for portable medical instruments, handheld gaming consoles, battery-powered sensor nodes, and white LED lighting applications requiring stable component supply with guaranteed long-term manufacturability.
Supply support for NCP1400ASN19T1 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 supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The NCP1400A series was designed specifically for ultra-low-voltage, micropower boost conversion in single- or dual-cell battery-powered portable electronics - emphasizing minimal external components, wide input range, and robust start-up capability.
FAQ
What is the minimum input voltage required for NCP1400ASN19T1 to start regulating?
The NCP1400ASN19T1 has a typical minimum startup voltage of 0.8 V, with a maximum of 0.95 V across temperature. This allows reliable startup from nearly depleted single-cell alkaline or NiMH batteries. The device continues operation down to less than 0.2 V input, making it ideal for maximizing battery utilization in energy-sensitive designs. NCP1400ASN19T1 achieves this via optimized gate drive and low-threshold internal MOSFET.
Can NCP1400ASN19T1 be used with a 3.3 V input source?
Yes - the NCP1400ASN19T1 supports input voltages up to 6.0 V on the OUT pin (absolute max rating), and its internal architecture allows operation with input voltages exceeding the 1.9 V output. However, when VIN > VOUT, the device enters pass-through mode with minimal regulation; efficiency drops and ripple increases. For 3.3 V inputs, NCP1400ASN19T1 remains functional but is not optimal - consider a buck regulator instead. NCP1400ASN19T1 is best deployed where VIN < VOUT.
What is the purpose of the NC pin (Pin 3) on NCP1400ASN19T1?
Pin 3 of the NCP1400ASN19T1 is a no-connect (NC) terminal with no internal bond wire or circuit connection. It must remain unconnected - neither routed nor soldered - to avoid mechanical stress or unintended coupling. The NC pin exists for package symmetry and manufacturing compatibility across the NCP1400A family; leaving it floating has zero electrical impact on NCP1400ASN19T1 performance or reliability.
How does the CE pin function on NCP1400ASN19T1, and what happens if left unconnected?
The CE pin on NCP1400ASN19T1 features an internal 150 nA pull-up current source tied to the OUT pin, so leaving it floating automatically enables the device. Applying ≥0.9 V enables normal operation; applying ≤0.3 V disables it, reducing quiescent current to 0.6 µA. Voltages between 0.3 V and 0.9 V place NCP1400ASN19T1 in an undefined state and must be avoided. No external pull-up is needed - NCP1400ASN19T1 is ready-to-use with CE unconnected.
What external components are required to implement a working NCP1400ASN19T1 boost converter?
A functional NCP1400ASN19T1 circuit requires exactly four external components: (1) a 22 µH inductor (e.g., Sumida CR54-220MC), (2) a Schottky diode (e.g., MBR0520LT1), (3) a 10 µF input capacitor (e.g., KEMET T491C106K016AS), and (4) a 68 µF output capacitor (e.g., KEMET T494D686K010AS). No feedback resistors or compensation components are needed - all regulation and stability are internal. This minimal BOM directly enables NCP1400ASN19T1's micropower, space-saving design goal.
NCP1400ASN19T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 1.9V
- Voltage - Output (Min/Fixed):
- 1.9V
- Voltage - Output (Max):
- -
- Current - Output:
- 80mA (Switch)
- Frequency - Switching:
- 180kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP1400ASN19T1 FAQ
1.How can I place an order for NCP1400ASN19T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1400ASN19T1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NCP1400ASN19T1 reliable?
The price and inventory of NCP1400ASN19T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1400ASN19T1 is usually 5 days.
3.What payment methods are accepted for NCP1400ASN19T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1400ASN19T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1400ASN19T1?
NCP1400ASN19T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1400ASN19T1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NCP1400ASN19T1?
For technical support, including NCP1400ASN19T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1400ASN19T1 requirements.
6.How does Aetrix verify that NCP1400ASN19T1 is sourced from the original manufacturer or authorized distributors?
All NCP1400ASN19T1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NCP1400ASN19T1 meets industry standards.
7.What is the process for return or replacement of NCP1400ASN19T1?
All NCP1400ASN19T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP1400ASN19T1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NCP1400ASN19T1 part is unused and in its original packaging.
Return procedure for NCP1400ASN19T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP1400ASN19T1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
