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onsemi NCP1400ASN50T1G
- Part No.:
- NCP1400ASN50T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1400ASN50T1G.pdf
- Description:
- IC REG BOOST 5V 100MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,551
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Product details
Overview
NCP1400ASN50T1G from onsemi is a micropower, fixed-frequency PWM step-up DC-DC switching regulator optimized for single- or dual-cell battery-powered portable devices. It delivers up to 100 mA output current at a regulated 5.0 V with startup capability down to 0.8 V input and operation sustained below 0.2 V. Its integrated power MOSFET, phase-compensated error amplifier, soft-start, and chip enable (CE) pin support efficient, stable boost conversion in discontinuous conduction mode for low-noise, long-battery-life applications.
For engineers reviewing the NCP1400ASN50T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.0 V fixed output, 180 kHz oscillator frequency, TSOP-5 package footprint, ultra-low startup voltage, and CE-controlled shutdown for <1.5 µA off-state current - critical for energy-constrained wearable and handheld designs.
Technical Context
The NCP1400ASN50T1G implements a voltage-mode PWM control architecture with an internal 180 kHz oscillator (±20% tolerance), phase-compensated error amplifier, and cycle-by-cycle current limiting. It operates exclusively in discontinuous conduction mode (DCM), relying on internal feedback resistors trimmed for 5.0 V ±2.5% output accuracy across −40°C to +85°C ambient.
Its control loop integrates soft-start (2.0 ms typical), VLX voltage limiting (0.8 V typ), and a dedicated CE pin with 150 nA internal pull-up - enabling reliable enable/disable without external biasing. The LX pin drives an external inductor while monitoring peak switch current via voltage sensing, with current limit threshold set at ~350 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2.5% - factory-trimmed internal feedback network eliminates need for external resistors; supports direct powering of 5 V logic or analog rails. |
| Oscillator Frequency | 180 kHz ±20% - fixed frequency enables predictable EMI filtering and consistent inductor sizing; temperature coefficient of 0.11%/°C ensures stability over operating range. |
| Startup Input Voltage | 0.8 V (typ) - allows operation from deeply discharged alkaline or NiMH cells; enables extended runtime in single-cell systems before cutoff. |
| Max Output Current | 100 mA - achievable under typical conditions (VIN ≥ 1.2 V, L = 22 µH, COUT = 68 µF); limited by internal MOSFET RDS(on) and thermal design in TSOP-5 package. |
| Quiescent Current | 70 µA (typ) at VOUT = 5.0 V - low operating current preserves battery life in always-on sensor nodes; drops to ≤1.5 µA in CE-disabled state. |
| Operating Temp Range | −40°C to +85°C - qualified for industrial and consumer portable environments; junction temperature rated to +125°C supports margin in compact enclosures. |
| Package | TSOP-5 (Case 483) - 3.0 × 1.5 mm surface-mount footprint with exposed pad option; compatible with standard reflow profiles and high-density PCB layouts. |
Pinout & Package
TSOP-5 package (Case 483), 5-pin surface-mount, Pb-free/RoHS-compliant. Pin 1 marked with microdot or laser etch; pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable input | Logic-level control: ≥0.9 V enables regulation; ≤0.3 V disables IC (≤1.5 µA IOFF); floating = enabled via internal 150 nA pull-up to OUT. |
| 2 - OUT | Output voltage monitor & supply rail | Provides regulated 5.0 V output and powers internal circuitry; must be decoupled with ≥10 µF capacitor; serves as reference for CE pull-up. |
| 3 - NC | No connection | Unbonded die pad; must remain unconnected on PCB - no routing, soldering, or grounding allowed. |
| 4 - GND | Power and signal ground | Primary return path for LX switch current, error amplifier, and oscillator; requires low-impedance one-point grounding per layout guidelines. |
| 5 - LX | Switch node | Drain of internal N-channel MOSFET; connects to inductor and Schottky diode anode; handles peak currents up to ~350 mA; sensitive to layout parasitics. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low startup voltage | 0.8 V enables boost operation from near-dead primary cells - extends usable battery capacity in remote sensors and low-power wearables. |
| Integrated phase compensation | On-die compensation network ensures stable DCM operation across full load (0–100 mA) and input range (0.2–5.0 V) without external components. |
| Soft-start timing | 2.0 ms typical ramp prevents inrush current into output capacitors - avoids input voltage droop and protects upstream battery or LDO stages. |
| VLX voltage limiting | 0.8 V typical clamp limits LX swing during startup or overload - prevents MOSFET overstress and improves reliability with low-VF Schottky diodes. |
| CE-controlled shutdown | Sub-µA disable current (≤1.5 µA) and defined enable thresholds eliminate need for external logic-level translators in battery-gated systems. |
Applications
| White LED Torch Light | Digital Cameras |
|---|---|
Use Scenario: Compact, battery-powered flashlight requiring constant-current LED drive from 1–2 AA/AAA cells. IC Role / Device Role / Timing Role: Step-up regulator providing stable 5.0 V rail to LED driver IC or current-sense resistor network. Use Value: 0.8 V startup enables light output even when batteries drop below 1.0 V; 100 mA capability supports multi-LED arrays with minimal board area. |
Use Scenario: Powering image sensor bias, flash memory interface, or LCD backlight in ultra-thin digital still cameras. IC Role / Device Role / Timing Role: Primary 5.0 V supply for CMOS image sensor I/O and memory controllers during burst capture sequences. Use Value: Low quiescent current (70 µA) minimizes standby drain; fixed 180 kHz frequency simplifies EMI filtering around sensitive analog pixel circuits. |
| Handheld Instruments | Personal Digital Assistants |
Use Scenario: Portable multimeters, thermal imagers, or gas detectors powered by coin cells or AAA batteries. IC Role / Device Role / Timing Role: Main DC-DC converter generating 5.0 V for microcontroller, display, and precision ADC reference. Use Value: Operation down to 0.2 V input preserves functionality through full battery discharge; TSOP-5 footprint enables miniaturized PCBs under 25 mm². |
Use Scenario: Legacy PDA platforms requiring 5.0 V for USB OTG, SD card interface, or touch controller. IC Role / Device Role / Timing Role: Secondary boost stage supplying regulated 5.0 V from main Li-ion or NiMH pack (2.4–4.2 V). Use Value: CE pin allows host MCU to gate power during sleep modes; ±2.5% output accuracy ensures reliable USB enumeration and SD card initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61022DRVR | Higher 2.0 A switch current, 2.5 MHz switching, adjustable output (0.9–5.5 V), requires external feedback resistors. | Better suited for higher-current loads (>200 mA) and space-constrained designs needing smaller inductors; lacks sub-1 V startup. | Select TPS61022DRVR when output current >100 mA or board area demands >1 MHz switching; avoid if 0.8 V startup or fixed 5.0 V is mandatory. |
| MAX17222ETA+ | 0.4 V startup, 500 mA output, 1.2 MHz, 5.0 V fixed option (MAX17222–50), but only 2.5% initial accuracy at 25°C (vs. ±2.5% over full temp range for NCP1400ASN50T1G). | Superior for ultra-low-voltage harvesting (e.g., energy harvesters), but less accurate over temperature and not qualified for industrial −40°C operation. | Choose MAX17222ETA+ for sub-0.8 V sources like thermoelectric or piezoelectric harvesters; retain NCP1400ASN50T1G for battery-powered industrial devices requiring wide-temp accuracy. |
Compared with TPS61022DRVR and MAX17222ETA+, the NCP1400ASN50T1G uniquely balances ultra-low startup voltage (0.8 V), guaranteed ±2.5% output accuracy over −40°C to +85°C, and minimal BOM count - making it optimal for cost-sensitive, battery-limited portable instruments where reliability across temperature and deep discharge matters most.
Availability
NCP1400ASN50T1G is available at Aetrix Electronics and suitable for handheld instruments, white LED torch lights, and digital camera power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP1400ASN50T1G 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 intelligent edge applications.
The NCP1400A series belongs to onsemi's micropower DC-DC converter product line, designed specifically for ultra-low-input-voltage, battery-constrained portable electronics - emphasizing minimal external components, robust startup behavior, and extended operational lifetime.
FAQ
What is the minimum input voltage required for NCP1400ASN50T1G to start switching?
The NCP1400ASN50T1G has a typical minimum startup voltage of 0.8 V, verified across production lots and specified in the Absolute Maximum Ratings table. It can initiate regulation from a single alkaline or NiMH cell even when deeply discharged. Startup voltage increases slightly with temperature - reaching up to 0.95 V at 85°C - so system design must allow margin below 0.8 V for worst-case cold conditions. The NCP1400ASN50T1G sustains operation down to <0.2 V once started.
Does NCP1400ASN50T1G require external feedback resistors to set its 5.0 V output?
No, the NCP1400ASN50T1G does not require external feedback resistors. Its 5.0 V output is set by an internal, factory-trimmed resistor divider network - confirmed in the Electrical Characteristics table (VOUT = 4.875 V to 5.125 V at 10 mA load). This eliminates two external components, reduces layout sensitivity, and ensures ±2.5% accuracy over −40°C to +85°C ambient - a key differentiator versus adjustable boost ICs.
Can NCP1400ASN50T1G operate in continuous conduction mode (CCM)?
No, the NCP1400ASN50T1G is explicitly designed for discontinuous conduction mode (DCM) operation only. The datasheet states: "Stability cannot be guaranteed in continuous conduction mode." Its internal compensation network, current-limiting scheme, and soft-start behavior are all optimized for DCM. Attempting CCM - e.g., using oversized inductors or heavy loads - risks instability, output ripple increase, and potential thermal stress not characterized by onsemi.
What is the maximum recommended inductor value for NCP1400ASN50T1G?
The recommended inductor range for NCP1400ASN50T1G is 18 µH to 27 µH, with 22 µH used in all evaluation data (Figures 4–7, 25–28). Larger values reduce peak current and EMI but lower efficiency and transient response; smaller values increase peak current capability but raise conduction losses. Inductor saturation current must exceed the worst-case peak current - calculated as IPK ≈ (VIN × tON) / L - with margin for temperature derating. The NCP1400ASN50T1G's internal current limit (~350 mA) sets the practical upper bound.
How does the CE pin behave when left unconnected on NCP1400ASN50T1G?
When the CE pin is left floating, the NCP1400ASN50T1G enables automatically due to an internal 150 nA pull-up current source connected to the OUT pin. This design eliminates the need for external pull-up resistors in always-on applications. However, the CE pin must never be biased between 0.3 V and 0.9 V - that range places the IC in an undefined state and may cause excessive supply current draw. For controlled enable/disable, drive CE to ≥0.9 V (enable) or ≤0.3 V (disable) with clean logic signals.
NCP1400ASN50T1G 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):
- 5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 100mA (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
NCP1400ASN50T1G FAQ
1.How can I place an order for NCP1400ASN50T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1400ASN50T1G 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 NCP1400ASN50T1G reliable?
The price and inventory of NCP1400ASN50T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1400ASN50T1G is usually 5 days.
3.What payment methods are accepted for NCP1400ASN50T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1400ASN50T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1400ASN50T1G?
NCP1400ASN50T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1400ASN50T1G 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 NCP1400ASN50T1G?
For technical support, including NCP1400ASN50T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1400ASN50T1G requirements.
6.How does Aetrix verify that NCP1400ASN50T1G is sourced from the original manufacturer or authorized distributors?
All NCP1400ASN50T1G 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 NCP1400ASN50T1G meets industry standards.
7.What is the process for return or replacement of NCP1400ASN50T1G?
All NCP1400ASN50T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1400ASN50T1G, 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 NCP1400ASN50T1G part is unused and in its original packaging.
Return procedure for NCP1400ASN50T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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